CN107979102A

CN107979102A - Loading interfaces power supply phase automatic clearing apparatus and its control method

Info

Publication number: CN107979102A
Application number: CN201610922607.4A
Authority: CN
Inventors: 谢楠; 张海波
Original assignee: Zhejiang University of Water Resources and Electric Power
Current assignee: Zhejiang University of Water Resources and Electric Power
Priority date: 2016-10-24
Filing date: 2016-10-24
Publication date: 2018-05-01
Anticipated expiration: 2036-10-24
Also published as: CN107979102B

Abstract

The invention discloses loading interfaces power supply phase automatic clearing apparatus and its control method.It is related to three-phase four-wire power delivery outlet phase electric separation and selects technical field, it can make the loading interfaces power supply phase malleable of three-phase four-wire power, and it can be exchanged automatically according to the uneven loading interfaces power supply phase that carries out of power factor (PF) on three-phase, including A phases, B phases, C phases, zero curve N, three loading interfaces, controller and several nodes and the three-phase activity coefficient monitor being connected respectively with controller, interface power factor monitor, two phase voltage sample circuits, two Single-Phase Inverter Sources, two filters, two isolating transformers, two loading interfaces voltage sampling circuits and several switches；The change of the input phase electricity between each loading interfaces is realized by the control of controller.

Description

Loading interfaces power supply phase automatic clearing apparatus and its control method

Technical field

The present invention relates to three-phase four-wire power delivery outlet phase electric separation to select technical field, and in particular to loading interfaces power supply phase is certainly Dynamic switch and its control method.

Background technology

With the development of economy and society, the type of power device is more and more.Since current electric power system is typically all Three-phase power supply system, in three-phase power supply system, if larger asymmetry occurs in the power factor (PF) on three-phase, just occurs The off-center operation of power grid, just occurs that power grid is shaken.

When operation of power networks is in non-equilibrium state, the transformer in power grid is at asymmetric operation state, in not right Claim the transformer of operating status the zero-sequence current of transformer can be made excessive, excessive zero-sequence current can make the local part of transformer Temperature increases, if the local Part temperature of transformer increase it is excessive may can burn transformer, so as to cause electric power system Power outage.

When unbalanced power supply is run, if to allow the power grid of off-center operation to be changed into the power grid of balance movement, at present The method taken is that the part load manual switching in the high power phase line of an a wide range of section is big to another In the low-power phase line of scope section.Since the load that this switching mode switches in moment is more, cause rushing for moment switching Hitting that electric current is excessive, excessive dash current can not only burn out switching device, due also in load switching at that moment, the load The front and rear power supply phase line difference of switching can cause the loaded work piece to occur chaotic or even damage.

The content of the invention

The present invention is to solve the deficiency of the loading interfaces of existing three-phase four-wire power power supply mutually not malleable, there is provided one Kind can make the loading interfaces power supply phase malleable of three-phase four-wire power, and can be loaded according to power factor (PF) imbalance on three-phase Interface power supply is mutually automatic to be exchanged, safe, good reliability, itself switching failure of energy autonomous detection combination switch, intelligence The high loading interfaces power supply phase automatic clearing apparatus of degree and its controlling party can be changed.

To achieve these goals, the present invention uses following technical scheme：

Loading interfaces power supply phase automatic clearing apparatus, including A phase, B phase, C phase, zero curve N, A connection jaws, B connection jaws, C connect Line mouth, No.1 loading interfaces, No. two loading interfaces, No. three loading interfaces, controller, node J1, node J2, node J3, node J4, node J5, node J6, node J7 and node J8；

Further include the three-phase activity coefficient monitor being connected respectively with controller, No.1 phase voltage sample circuit, No.1 list Phase inverter, No.1 filter, No.1 isolating transformer, No.1 loading interfaces voltage sampling circuit, interface power factor prison Device, No. two phase voltage sample circuits, No. two Single-Phase Inverter Sources, No. two filters are surveyed, No. two isolating transformers, No. two loads connect Mouth voltage sampling circuit, switch K1, switch K2, switch K3, switch K4, switch K5, switch K6, switch K7, switch K8, switch K9, switch K10, switch K11, switch K12, switch K13, switch K14, switch K15, switch K16, switch K17, switch K18, open Close K19, switch K20 and switch K21；

A is connected on the firewire input terminal of A connection jaws, and B is connected on the firewire input terminal of B connection jaws, and C is connected On the firewire input terminal of C connection jaws, the zero curve input terminal of A connection jaws, the zero of the zero curve input terminal of B connection jaws and C connection jaws Line input terminal is connected with zero curve N；

Switch a samplings of one end of K19, a monitoring sides of three-phase activity coefficient monitor, No.1 phase voltage sample circuit End, a sampling ends of No. two phase voltage sample circuits, the one end for switching K1, the output terminal of A connection jaws, the one end for switching K9, switch One end of K13 and one end of switch K15 are connected with node J1 respectively；

Switch the b samplings of one end of K20, the b monitoring sides of three-phase activity coefficient monitor, No.1 phase voltage sample circuit End, the b sampling ends of No. two phase voltage sample circuits, the one end for switching K2, the output terminal of B connection jaws, the one end for switching K8, switch One end of K12 and one end of switch K14 are connected with node J2 respectively；

Switch the c samplings of one end of K21, the c monitoring sides of three-phase activity coefficient monitor, No.1 phase voltage sample circuit End, the c sampling ends of No. two phase voltage sample circuits, the one end for switching K3, the output terminal of C connection jaws, the one end for switching K7, switch One end of K10 and one end of switch K11 are connected with node J3 respectively；

The power output end of No.1 isolating transformer, the sampling end of No.1 loading interfaces voltage sampling circuit, switch K4's One end of one end, the one end for switching K5 and switch K6 is connected with node J4 respectively；

The power output end of No. two isolating transformers, the sampling end of No. two loading interfaces voltage sampling circuits, switch K16 One end of one end, the one end for switching K17 and switch K18 is connected with node J5 respectively；

The other end for switching K4, the other end, the other end, the other end, the interface work(of switch K14 of switch K10 that switch K9 The No.1 monitoring side of rate factor monitor and No.1 loading interfaces are connected with node J6 respectively；

The other end for switching K5, the other end, the other end, the other end, the interface work(of switch K15 of switch K11 that switch K8 No. two monitoring sides of rate factor monitor and No. two loading interfaces are connected with node J7 respectively；

The other end for switching K6, the other end, the other end, the other end, the interface work(of switch K13 of switch K12 that switch K7 No. three monitoring sides of rate factor monitor and No. three loading interfaces are connected with node J8 respectively；

Switch the other end of K1, the other end of switch K2 and switch electricity of the other end of K3 with No.1 Single-Phase Inverter Source Source input terminal connection, the input terminal of No.1 filter are connected on the power output end of No.1 Single-Phase Inverter Source, No.1 filtering The output terminal of device is connected on the power input of No.1 isolating transformer；

Switch K19 the other end, switch K20 the other end and switch K21 the other end with No. two Single-Phase Inverter Sources Power input connection, the input terminal of No. two filters is connected on the power output end of No. two Single-Phase Inverter Sources, No. two The output terminal of filter is connected on the power input of No. two isolating transformers；

Switch K1, switch K2, switch K3, switch K7, switch K8, switch K9, switch K10, switch K11, switch K12, open It is the identical combination switch of circuit structure to close K13, switch K14, switch K15, switch K19, switch K20 and switch K21；

Combination switch includes No.1 node, No. two nodes, node Ms_a, node M_b, inductance L_a, capacitance C_a, capacitance C₂, diode D₁, diode D₂, diode D₃, diode D₄, photoelectrical coupler OPT, resistance R₀, resistance R₁, resistance R₂, switching switch K_a, magnetic drive Dynamic electric power road, silicon drive circuit, from electricity consumption power supply module and ground terminal SGND,

Controller includes pulse counter；Switching switch K_aIncluding reverse-blocking tetrode thyristor K_bK is switched with magnetic latching relay_c, Photoelectrical coupler OPT includes light emitting diode D₅With phototriode Q₀；

Reverse-blocking tetrode thyristor K_bOne end and magnetic latching relay switch K_cOne end be connected respectively with No.1 node, it is silicon-controlled Switch K_bThe other end, resistance R1 one end and inductance L_aOne end respectively with node M_aConnection, inductance L_aThe other end, magnetic protect Hold relay switch K_cThe other end, resistance R2 one end and capacitance C_aOne end respectively with node M_bConnection, capacitance C_aIt is another End is connected on No. two nodes, the other end and the capacitance C of resistance R1₂One end connection, diode D₁Positive terminal and diode D₃ Negative pole end be connected to capacitance C₂The other end on, diode D₂Positive terminal and diode D₄Negative pole end connect respectively In resistance R₂The other end on, diode D₁Negative pole end and diode D₂Negative pole end be connected to light emitting diode D₅'s On positive terminal, diode D₃Positive terminal and diode D₄Positive terminal be connected to light emitting diode D₅Negative pole end on, light Quick triode Q₀Collector terminal respectively with resistance R₀One end connected with controller, phototriode Q₀Emitter and signal Ground terminal SGND connections, from electricity consumption power supply module respectively with resistance R₀The other end, Magnetic driving circuit, silicon drive circuit and control Device connect, silicon drive circuit respectively with reverse-blocking tetrode thyristor K_bControl terminal connected with controller, Magnetic driving circuit respectively with magnetic protect Hold relay switch K_cControl terminal connected with controller；

No.1 node can only be conducted with wherein one in A phases, B phases and C phases this three-phases and be connected in discontinuity surface when same； No. two nodes are connected on zero curve N.

This programme can make the loading interfaces power supply phase malleable of three-phase four-wire power, and can be according to power factor (PF) on three-phase not Balance carries out that loading interfaces power supply is mutually automatic to be exchanged, safe, good reliability, can autonomous detection combination switch itself Switching failure, intelligence degree are high.

Preferably, No.1 loading interfaces are quick connector, quick connector includes plug and housing, in the upper of housing Insulation tube is fixed with surface upwards, the pressure sensor being connected with controller is equipped with the outer tube wall of insulation tube, exhausted The through hole being connected with the inner cavity of housing is fixed with the housing upper surface that edge pipe surrounds, contact pin is fixed with through hole, and The lower end of contact pin is located at the interior intracavitary of housing, and the upper end of contact pin is located in insulation tube；The both ends of a piece conducting wire are conductively connected respectively On the lower end of contact pin and node J6；The contact tube that plug includes insulation intubation and is arranged in insulation intubation；Insulation intubation Internal diameter is matched with the outside diameter of insulation tube, and the diameter of contact pin is matched with the internal diameter of contact tube；The structure of No. two loading interfaces and No. three The structure of loading interfaces is identical with the structure of No.1 loading interfaces.

Preferably, further include the memory being connected respectively with controller, wireless module, address scrambler and server.

A kind of control method suitable for loading interfaces power supply phase automatic clearing apparatus, control method include combination switch Itself switching breakdown judge process, itself switching breakdown judge process of combination switch include reverse-blocking tetrode thyristor K_bCan not turn on Failure, magnetic latching relay switch K_cCan not close failure, magnetic latching relay switch K_cCan not disconnect failure and silicon-controlled Switch K_bCan not turn off failure；

(4-1) judges reverse-blocking tetrode thyristor K_bFor can not the process of conducting failure be：

When putting into combination switch, it is assumed that reverse-blocking tetrode thyristor K_bIt is off state, and magnetic latching relay switch K_cAlso locate On the premise of off-state,

(4-1-1) is first from controller to reverse-blocking tetrode thyristor K_bConductivity control signal is sent, controller waits reverse-blocking tetrode thyristor K_b The start pulse signal that returns of operation detecting circuit, and with the pulse counter of controller into line triggering pulse counting, when prolonging When setting time after, if the trigger pulse number that receives of controller is when setting more than number, you can think that this silicon-controlled is opened Close K_bEnergy normally, if the trigger pulse number that controller receives is less than setting number,

(4-1-2) is again from controller to reverse-blocking tetrode thyristor K_bConductivity control signal is sent, and pulse counter is reset, then After the secondary delay adjustments time, if the trigger pulse number that receives of controller is still less than setting number, you can judge that this is controllable Transwitch K_bFor can not conducting failure；

(4-2) judges that magnetic latching relay switchs K_cIt is for the process of failure can not be closed：

When putting into combination switch, it is assumed that reverse-blocking tetrode thyristor K_bEnergy normally, and reverse-blocking tetrode thyristor Kb has been on State and magnetic latching relay switch K_cOn the premise of being off,

(4-2-1) first switchs K from controller to magnetic latching relay_cSend closure control signal, and by pulse counter Reset, after the delay adjustments time, if controller receives reverse-blocking tetrode thyristor K_bTrigger pulse number set number more than when,

(4-2-2) switchs K from controller to magnetic latching relay again_cSend disconnection control signal, and by pulse counter Reset, then after the delay adjustments time, if controller receives reverse-blocking tetrode thyristor K_bTrigger pulse number also setting number with When upper,

(4-2-3) switchs K from controller to magnetic latching relay again_cSend closure control signal, and by step-by-step counting Device is reset, again after the delay adjustments time, at this time if controller receives reverse-blocking tetrode thyristor K_bTrigger pulse count still exist When setting more than number, you can judge that the magnetic latching relay switchs K_cFor failure can not be closed；

(4-3) judges that magnetic latching relay switchs K_cIt is for the process of failure can not be disconnected：

When cutting off combination switch, it is assumed that reverse-blocking tetrode thyristor K_bEnergy normally, and reverse-blocking tetrode thyristor K_bIn disconnection shape State and magnetic latching relay switch K_cOn the premise of being in closure state,

(4-3-1) is first from controller to reverse-blocking tetrode thyristor K_bConductivity control signal is sent by reverse-blocking tetrode thyristor K_bConducting, and prolong When setting time allow reverse-blocking tetrode thyristor K_bAfter reliable conducting, and K is switched from controller to magnetic latching relay_cSend disconnection control Signal, and pulse counter is reset, after waiting setting time, if controller receives reverse-blocking tetrode thyristor K_bTrigger pulse When number is less than setting number；

(4-3-2) switchs K from controller to magnetic latching relay again_cSend disconnection control signal, and by pulse counter Reset, after again waiting for setting time, if controller receives reverse-blocking tetrode thyristor K_bTrigger pulse number still less than setting During number, you can judge that magnetic latching relay switchs K_cFor failure can not be disconnected；

(4-4) judges reverse-blocking tetrode thyristor K_bIt is for the process of failure can not be turned off：

When cutting off combination switch, it is assumed that magnetic latching relay switchs K_cCan normally it disconnect, and magnetic latching relay switch K_c It has been off and reverse-blocking tetrode thyristor K_bOn the premise of also in conducting state,

(4-4-1) is first from controller to reverse-blocking tetrode thyristor K_bShut-off control signal is sent, and pulse counter is reset, is prolonged When setting time after, if controller receives reverse-blocking tetrode thyristor K_bTrigger pulse number set number more than when；

(4-4-2) is again from controller to reverse-blocking tetrode thyristor K_bShut-off control signal is sent, and pulse counter is reset, then After the secondary delay adjustments time, if controller receives reverse-blocking tetrode thyristor K_bTrigger pulse number still set number more than when, It can determine whether reverse-blocking tetrode thyristor K_bFor failure can not be turned off.

A kind of control method suitable for loading interfaces power supply phase automatic clearing apparatus, control method are supplied including loading interfaces The mutually automatic exchange process of electricity, mutually automatic exchange process is as follows for loading interfaces power supply：

(5-2) three-phase activity coefficient monitor carries out power factor respectively in setting time interval to A phases, B phases and C phases Balance monitoring, and the monitoring data of every phase are uploaded to controller respectively, controller is immediately on three-phase activity coefficient monitor The monitoring data of biography carry out calculating processing；

If controller obtains current power after carrying out calculating processing to the monitoring data that three-phase activity coefficient monitor uploads Factor it is maximum be mutually A phases, current power factor minimum is mutually C phases, and power factor P at this time_ACMore than setting value P₀ When, then it needs to be determined that it is currently by A phases, B phases and C respectively to go out No.1 loading interfaces, No. two loading interfaces and No. three loading interfaces Mutually which in this three-phase is mutually powered to it；

(5-3) controller sends interface monitor instruction, the monitoring of interface power factor to interface power factor monitor immediately Device is immediately carried out at the same time the power factor in No.1 loading interfaces, No. two loading interfaces and No. three loading interfaces monitoring, and will Monitoring data in No.1 loading interfaces, No. two loading interfaces and No. three loading interfaces are uploaded to controller respectively, and controller is stood The monitoring data uploaded to interface power-factor monitoring device carry out calculating processing；

It can be determined respectively after the monitoring data that controller uploads interface power-factor monitoring device carry out calculating processing Which in A phases, B phases and C phases this three-phases goes out No.1 loading interfaces, No. two loading interfaces and No. three loading interfaces is currently by respectively One phase is powered to it；

If determining at this time, the power supply in No.1 loading interfaces is mutually powered by A phases, and the power supply in No. two loading interfaces is mutually by B Mutually power, the power supply in No. three loading interfaces is mutually powered by C phases, then switch K7, switch K8 and switch K9 at this time are in closing Conjunction state, switch K1, switch K2, switch K3, switch K4, switch K5, switch K6, switch K10, switch K11, switch at this time K12, switch K13, switch K14, switch K15, switch K16, switch K17 and switch K18 are in off-state, No.1 at this time The sample trap cutter spacing of phase voltage sample circuit is on d ends, and the sample trap cutter spacing of No. two phase voltage sample circuits is on d ends；

(5-4) is that the absolute value for making power factor in A phases, B phases and C phases two-by-two after the difference of absolute value is less than setting value P0, then need the power supply in No.1 loading interfaces mutually powering change by A phases to be powered by C phases, the power supply in No. two loading interfaces Mutually still powered by B phases, the power supply in No. three loading interfaces mutually powers change to be powered by A phases by C phases；

Power supply in No.1 loading interfaces is mutually powered change to be powered by C phases and by No. three loading interfaces by (5-5) by A phases Power supply mutually by C phases power become for powered by A phases loading interfaces power supply mutually automatically exchange process it is as follows：

(5-5-1) first, allows the sampling plug-in strip of No.1 phase voltage sample circuit to be connected to No.1 phase voltage sample circuit_a It is connected on sampling end with A, the voltage signal of No.1 phase voltage sample circuit collection A phases is simultaneously uploaded to controller；

Then, switch K1 closures are allowed No.1 Single-Phase Inverter Source is connected with A；Under the control of the controller, No.1 list Phase inverter output voltage signal with the voltage signal of A phases as reference, with No.1 Single-Phase Inverter Source export voltage Signal forms No.1 closed-loop control, produces No.1 drive signal in the controller, make No.1 single-phase inversion electric as feedback signal The No.1 voltage waveform of source output exports stable No.1 by No.1 isolating transformer again after first passing through the filtering of No.1 filter Sine-wave power, and make the No.1 sine-wave power of No.1 isolating transformer output and A phase voltages same under the control of the controller Amplitude same-phase；

Then, it is closed at switch K4 and disconnects switch K9, the state of the power supply phase in No.1 loading interfaces is still at this time It is identical with the state of the power supply phase in A phases；

Then, still allow switch K1 to close, allow the sampling plug-in strip of No.1 phase voltage sample circuit to be connected to No.1 phase voltage It is connected on the c sampling ends of sample circuit with C, the voltage signal of No.1 phase voltage sample circuit collection C phases is simultaneously uploaded to control Device；Controller uses phase shifting control, the voltage signal that No.1 Single-Phase Inverter Source exports is used as ginseng using the voltage signal of C phases Examine, using the voltage signal of No.1 Single-Phase Inverter Source output as feedback signal, new No.1 closed-loop control is formed, in controller The No.1 drive signal of middle generation SPWM, makes the No.1 voltage waveform that No.1 Single-Phase Inverter Source exports first pass through No.1 filter Again by the stable No.1 sine-wave power of No.1 isolating transformer output after filtering, and make under the control of the controller No.1 every From transformer output No.1 sine-wave power and C phase voltages with amplitude same-phase, the power supply phase in No.1 loading interfaces at this time State it is identical with the state of the power supply phase in C phases；

(5-5-2) similarly, allows the sampling plug-in strip of No. two phase voltage sample circuits to be connected to the c of No. two phase voltage sample circuits It is connected on sampling end with C, the voltage signal of No. two phase voltage sample circuit collection C phases is simultaneously uploaded to controller；

Then, switch K21 closures are allowed No. two Single-Phase Inverter Sources is connected with C；Under the control of the controller, No. two lists The voltage signal of phase inverter output with the voltage signal of C phases as reference, with the voltage of No. two Single-Phase Inverter Sources output Signal forms No. two closed-loop controls, produces No. two drive signals in the controller, make No. two single-phase inversion electricity as feedback signal No. two voltage waveforms of source output export stable No. two by No. two isolating transformers again after first passing through No. two filter filterings Sine-wave power, and make No. two sine-wave powers of No. two isolating transformers output and C phase voltages same under the control of the controller Amplitude same-phase；

Then, be closed at switch K18 and disconnect switch K7, at this time the state of the power supply phase in No. three loading interfaces also with The state of power supply phase in C phases is identical；

Then, still allow switch K21 to close, allow the sampling plug-in strip of No. two phase voltage sample circuits to be connected to No. two phase voltages It is connected on a sampling ends of sample circuit with A, the voltage signal of No. two phase voltage sample circuit collection A phases is simultaneously uploaded to control Device；Controller uses phase shifting control, the voltage signal of No. two Single-Phase Inverter Source output is used as ginseng using the voltage signal of A phases Examine, using the voltage signal of No. two Single-Phase Inverter Source output as feedback signal, No. two new closed-loop controls are formed, in controller No. two drive signals of middle generation SPWM, make No. two voltage waveforms of No. two Single-Phase Inverter Source outputs first pass through No. two filters Again by No. two stable sine-wave powers of No. two isolating transformers output after filtering, and make under the control of the controller No. two every From transformer output No. two sine-wave powers and A phase voltages with amplitude same-phase, the power supply phase in No. three loading interfaces at this time State it is identical with the state of the power supply phase in A phases；

(5-5-3) then, is closed at switch K10, disconnects switch K4, closure switch K13 and disconnects switch K18, at this time Power supply in No.1 loading interfaces is mutually powered by C phases completely, and the power supply in No. three loading interfaces is mutually powered by A phases completely；

(5-5-4) finally, the sample trap knife of No.1 phase voltage sample circuit is turned on d ends, and No. two phase voltages are adopted The sample trap knife of sample circuit is turned on d ends, is disconnected switch K1 and is disconnected switch K21, so that No.1 phase voltage sample circuit, No.1 Single-Phase Inverter Source, No.1 filter, No.1 isolating transformer, No. two phase voltage sample circuits, No. two single-phase inversion electricity Source, No. two filters and No. two isolating transformers exit the operation that loading interfaces power supply mutually exchanges automatically；

(5-5-5) so far, by the power supply in No.1 loading interfaces mutually powers change to be powered by C phases and being born No. three by A phases Power supply on load interface is mutually powered to become by C phases to be terminated into the automatic exchange process of loading interfaces power supply phase powered by A phases；

(5-5-6) similarly, the power supply phase in No.1 loading interfaces, the power supply phase in No. two loading interfaces and No. three are loaded Mutually the principle that is exchanged two-by-two becomes to be supplied by C phases with the power supply in No.1 loading interfaces is mutually powered by A phases for power supply on interface Electricity with by No. three loading interfaces power supply mutually by C phases power change into the principle powered by A phases it is identical.

A kind of control method suitable for loading interfaces power supply phase automatic clearing apparatus, is handed over if loading interfaces power supply is mutually automatic Change the outfit when being equipped with two, then the two loading interfaces power supply phase automatic clearing apparatus can by respective wireless module by this two A loading interfaces power supply phase automatic clearing apparatus carries out mutual wireless signal connection；

When only one of which loads in three loading interfaces in first loading interfaces power supply phase automatic clearing apparatus Interface is connected with load, and only wherein two in three loading interfaces in second loading interfaces power supply phase automatic clearing apparatus When a loading interfaces are connected with load；

If this loading interfaces of first loading interfaces power supply phase automatic clearing apparatus determine, Then allow the two loading interfaces of second loading interfaces power supply phase automatic clearing apparatus to be powered by B phases respectively to power with C phases.

The present invention can reach following effect：

Can make three-phase four-wire power loading interfaces power phase malleable, and can according to power factor (PF) imbalance on three-phase into Row loading interfaces are powered and are mutually exchanged automatically, safe, good reliability, itself switching event of energy autonomous detection combination switch Barrier, intelligence degree are high.The flexibility of network load switching can be strengthened, the reliability that phase cutting is changed is also enhanced, can carry significantly The stability and reliability of high operation of power networks.

Brief description of the drawings

Fig. 1 is that the power supply in No.1 loading interfaces is mutually powered by A phases, the power supply in No. two loading interfaces is mutually powered by B phases A kind of schematic diagram of circuit principle connecting structure when mutually being powered with the power supply in No. three loading interfaces by C phases.

Fig. 2 be the sampling plug-in strip of No.1 phase voltage sample circuit be connected on a sampling ends of No.1 phase voltage sample circuit, The sampling plug-in strip of No. two phase voltage sample circuits is connected on the c sampling ends of No. two phase voltage sample circuits, closure switch K1 and A kind of schematic diagram of circuit principle connecting structure during closure switch K21.

Fig. 3 is one in closure switch K4, disconnection switch K9, closure switch K18 and disconnection switch K7 on the basis of Fig. 2 Kind schematic diagram of circuit principle connecting structure.

Fig. 4 is to allow the sampling plug-in strip of No.1 phase voltage sample circuit to be connected to the sampling of No.1 phase voltage on the basis of Fig. 3 On the c sampling ends of circuit and allow the sampling plug-in strip of No. two phase voltage sample circuits to be connected to a of No. two phase voltage sample circuits to adopt A kind of schematic diagram of circuit principle connecting structure when on sample end.

Fig. 5 is to allow the sampling plug-in strip of No.1 phase voltage sample circuit to be connected to the sampling of No.1 phase voltage on the basis of Fig. 4 On the d sampling ends of circuit, the sampling plug-in strip of No. two phase voltage sample circuits is allowed to be connected to the d samplings of No. two phase voltage sample circuits On end, closure switch K10, disconnect switch K4, closure switch K13 and disconnect switch K18 when a kind of circuit theory connection structure Schematic diagram.

Fig. 6 is that switch K1 is disconnected on the basis of Fig. 4 and disconnects switch K21, so far by the power supply in No.1 loading interfaces Mutually powered by A phases after becoming to be powered by C phases and the power supply in No. three loading interfaces mutually being powered change to be powered by A phases by C phases A kind of schematic diagram of circuit principle connecting structure.

Fig. 7 is mutually powered by B phases for the power supply in No.1 loading interfaces and is mutually powered with the power supply in No. two loading interfaces by A phases A kind of schematic diagram of circuit principle connecting structure.

Fig. 8 is mutually powered by C phases for the power supply in No. two loading interfaces and is mutually powered with the power supply in No. three loading interfaces by B phases A kind of schematic diagram of circuit principle connecting structure.

Fig. 9 is that the contact tube of plug is not inserted into a kind of attachment structure schematic diagram not being connected in insulation tube also.

Figure 10 is that the contact tube of plug is already inserted into a kind of attachment structure schematic diagram being connected in insulation tube.

Figure 11 is a kind of schematic diagram of circuit principle connecting structure at combination switch.

Figure 12 is reverse-blocking tetrode thyristor K_bA kind of waveform diagram.

Embodiment

Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.

Embodiment 1：Loading interfaces are powered phase automatic clearing apparatus, referring to shown in Fig. 1 and Figure 11, including A phase, B phase, C phase, Zero curve N, A connection jaws, B connection jaws, C connection jaws, the loading interfaces of loading interfaces 822, three of No.1 loading interfaces 811, two 833rd, controller 107, node J1, node J2, node J3, node J4, node J5, node J6, node J7 and node J8；

Further include the three-phase activity coefficient monitor 101 being connected respectively with controller, No.1 phase voltage sample circuit 102, No.1 Single-Phase Inverter Source 103, No.1 filter 104, No.1 isolating transformer 105, No.1 loading interfaces voltage sampling circuit 108th, 1030, No. two filterings of the phase voltage sample circuit 110, two of interface power factor monitor 109, two Single-Phase Inverter Source Device 1040,1050, No. two loading interfaces voltage sampling circuits 1080 of No. two isolating transformers, switch K1, switch K2, switch K3, Switch K4, switch K5, switch K6, switch K7, switch K8, switch K9, switch K10, switch K11, switch K12, switch K13, open Close K14, switch K15, switch K16, switch K17, switch K18, switch K19, switch K20 and switch K21；

Combination switch includes No.1 node 701, No. two nodes 702, node Ms_a, node M_b, inductance L_a, capacitance C_a, capacitance C₂、 Diode D₁, diode D₂, diode D₃, diode D₄, photoelectrical coupler OPT, resistance R₀, resistance R₁, resistance R₂, switching switch K_a, Magnetic driving electric power road 502, silicon drive circuit 503, from electricity consumption power supply module 901 and ground terminal SGND,

Controller 107 includes pulse counter 805；Switching switch K_aIncluding reverse-blocking tetrode thyristor K_bAnd magnetic latching relay Switch K_c, photoelectrical coupler OPT includes light emitting diode D₅With phototriode Q₀；

No.1 node 701 can only be with the wherein company of being conducted in A phases, B phases and C phases this three-phases in discontinuity surface when same Connect；No. two nodes 702 are connected on zero curve N.

Combination switch fault self-checking principle is as follows：Referring to shown in Figure 11 and Figure 12,

When needing switching combination switch, controller is to reverse-blocking tetrode thyristor K_bConductivity control signal is sent, makes silicon-controlled open Close K_bConducting.Electric current is through reverse-blocking tetrode thyristor K_b, inductance L_aWith capacitance C_aClosed circuit is formed, is connected in parallel on inductance L_aThe capacitance at both ends C₂, diode D₁, diode D₂, diode D₃, diode D₄, photoelectrical coupler OPT, resistance R₁, resistance R₀, resistance R₂, from electricity consumption Power supply module and ground terminal SGND together form reverse-blocking tetrode thyristor K_bOperation detecting circuit.Reverse-blocking tetrode thyristor is flowed through in electric current K_bWhen reverse-blocking tetrode thyristor K_bOperation detecting circuit can produce start pulse signal, keep after a certain period of time, controller is protected to magnetic Hold relay switch K_cClosure control signal is sent, magnetic latching relay is switched K_cClosure.Magnetic latching relay switchs K_cClosure Afterwards by reverse-blocking tetrode thyristor K_bWith inductance L_aThe series arm of composition is short-circuit, at this time reverse-blocking tetrode thyristor K_bOperation detecting circuit will not Trigger pulse can be produced.Then, controller is to reverse-blocking tetrode thyristor K_bDisconnection control signal is sent, makes reverse-blocking tetrode thyristor K_bDisconnect, by Magnetic latching relay switchs K_cKeep current supply circuit work.

When needing to cut off combination switch, controller is to reverse-blocking tetrode thyristor K_bConductivity control signal is sent, makes silicon-controlled open Close K_bConducting, keeps after a certain period of time, controller switchs K to magnetic latching relay_cDisconnection control signal is sent, magnetic keeps relay Device switchs K_cThen turn off, at this time, silicon-controlled operation detecting circuit there will be trigger pulse appearance.Finally, controller is to silicon-controlled Switch K_bDisconnection control signal, reverse-blocking tetrode thyristor K are sent again_bThen turn off.So far combination switch has just been cut off completely.U_CNIt is Voltage in C phases.For sake of convenience, A phases, B phases are collectively referred to as firewire with C phases.

Combination switch possesses self fault detect can be carried out during switch motion, and without another in combination switch The outer instrument for setting detection failure, so that the structure of combination switch is simpler, small, structure is reliable, of low cost, drop Switching unsuccessful security risk when low combination switch uses.Combination switch can the intelligence for composite that switch itself switching failure Energyization detects, and can let the user know that whether combination switch failure occurs in time, easy to replace in time, simple in structure, reliability Height, security are good.Filter improves the reliability of isolating transformer input, so that the reliability of isolating transformer output Higher.

(1), in use, the automatic exchange process of loading interfaces power supply phase is as follows：

Shown in Figure 1, if determining at this time, the power supply in No.1 loading interfaces is mutually powered by A phases, No. two loading interfaces On power supply mutually powered by B phases, power supply in No. three loading interfaces is mutually powered by C phases, then switch K7, switch K8 at this time and is opened Close K9 and be in closure state, switch K1 at this time, switch K2, switch K3, switch K4, switch K5, switch K6, switch K10, open Close K11, switch K12, switch K13, switch K14, switch K15, switch K16, switch K17 and switch K18 and be in off-state, The sample trap cutter spacing of No.1 phase voltage sample circuit at this time is on d ends, and the sample trap cutter spacing of No. two phase voltage sample circuits is in d On end；

(5-4) is that the absolute value for making power factor in A phases, B phases and C phases two-by-two after the difference of absolute value is less than setting value P₀, then need the power supply in No.1 loading interfaces mutually powering change by A phases to be powered by C phases, the power supply in No. two loading interfaces Mutually still powered by B phases, the power supply in No. three loading interfaces mutually powers change to be powered by A phases by C phases；

(5-5-1) first, allows the sampling plug-in strip of No.1 phase voltage sample circuit to be connected to a of No.1 phase voltage sample circuit It is connected on sampling end with A, shown in Figure 2, the voltage signal of No.1 phase voltage sample circuit collection A phases is simultaneously uploaded to control Device；

Then, switch K1 closures are allowed No.1 Single-Phase Inverter Source is connected with A；It is shown in Figure 3, in the control of controller Under system, No.1 Single-Phase Inverter Source output voltage signal with the voltage signal of A phases as reference, with No.1 Single-Phase Inverter Source The voltage signal of output forms No.1 closed-loop control, produces No.1 drive signal in the controller, make No.1 as feedback signal The No.1 voltage waveform of Single-Phase Inverter Source output is exported by No.1 isolating transformer again after first passing through the filtering of No.1 filter Stable No.1 sine-wave power, and make under the control of the controller No.1 isolating transformer export No.1 sine-wave power with A phase voltages are the same as amplitude same-phase；

Then, it is closed at switch K4 and disconnects switch K9, shown in Figure 3, the power supply in No.1 loading interfaces at this time The state of phase is still identical with the state of the power supply phase in A phases；

Then, still allow switch K1 to close, allow the sampling plug-in strip of No.1 phase voltage sample circuit to be connected to No.1 phase voltage It is connected on the c sampling ends of sample circuit with C, shown in Figure 4, No.1 phase voltage sample circuit gathers the voltage signal of C phases And it is uploaded to controller；Controller uses phase shifting control, makes the voltage signal that No.1 Single-Phase Inverter Source exports with the voltage of C phases Signal as reference, using the voltage signal of No.1 Single-Phase Inverter Source output as feedback signal, forms new No.1 closed loop control System, produces the No.1 drive signal of SPWM in the controller, the No.1 voltage waveform that No.1 Single-Phase Inverter Source exports first is passed through Cross after the filtering of No.1 filter again by the stable No.1 sine-wave power of No.1 isolating transformer output, and in the control of controller The No.1 sine-wave power that No.1 isolating transformer exports is set to be connect with C phase voltages with amplitude same-phase, at this time No.1 load under system The state of power supply phase on mouth is identical with the state of the power supply phase in C phases；

(5-5-2) similarly, allows the sampling plug-in strip of No. two phase voltage sample circuits to be connected to the c of No. two phase voltage sample circuits It is connected on sampling end with C, shown in Figure 2, the voltage signal of No. two phase voltage sample circuit collection C phases is simultaneously uploaded to control Device；

Then, switch K21 closures are allowed No. two Single-Phase Inverter Sources is connected with C；It is shown in Figure 3, in controller Under control, the voltage signal of No. two Single-Phase Inverter Sources output with the voltage signal of C phases as reference, with No. two single-phase inversion electricity The voltage signal of source output forms No. two closed-loop controls, produces No. two drive signals in the controller, make two as feedback signal No. two voltage waveforms of number Single-Phase Inverter Source output first pass through defeated by No. two isolating transformers again after No. two filters filterings Go out No. two stable sine-wave powers, and make No. two sine-wave powers of No. two isolating transformer output under the control of the controller With C phase voltages with amplitude same-phase；

Then, it is closed at switch K18 and disconnects switch K7, shown in Figure 3, the power supply in No. three loading interfaces at this time The state of phase is also identical with the state of the power supply phase in C phases；

Then, still allow switch K21 to close, allow the sampling plug-in strip of No. two phase voltage sample circuits to be connected to No. two phase voltages It is connected on a sampling ends of sample circuit with A, shown in Figure 4, the voltage signal of No. two phase voltage sample circuit collection A phases And it is uploaded to controller；Controller uses phase shifting control, makes the voltage signal of No. two Single-Phase Inverter Source output with the voltage of A phases Signal as reference, using the voltage signal of No. two Single-Phase Inverter Source output as feedback signal, forms No. two new closed loop controls System, produces No. two drive signals of SPWM in the controller, No. two voltage waveforms of No. two Single-Phase Inverter Source outputs is first passed through Cross after No. two filter filterings again by No. two stable sine-wave powers of No. two isolating transformer output, and in the control of controller No. two sine-wave powers of No. two isolating transformer outputs are made to be connect with A phase voltages with amplitude same-phase, at this time No. three loads under system The state of power supply phase on mouth is identical with the state of the power supply phase in A phases；

(5-5-3) then, is closed at switch K10, disconnects switch K4, closure switch K13 and disconnects switch K18, referring to Shown in Fig. 5, the power supply in No.1 loading interfaces at this time is mutually powered by C phases completely, and the power supply in No. three loading interfaces is mutually completely by A Mutually power；

(5-5-4) finally, the sample trap knife of No.1 phase voltage sample circuit is turned on d ends, and No. two phase voltages are adopted The sample trap knife of sample circuit is turned on d ends, disconnects switch K1 and disconnection switchs K21, shown in Figure 6, so that No.1 phase Voltage sampling circuit, No.1 Single-Phase Inverter Source, No.1 filter, No.1 isolating transformer, No. two phase voltage sample circuits, two Number Single-Phase Inverter Source, No. two filters and No. two isolating transformers exit the operation that loading interfaces power supply mutually exchanges automatically；

It is shown in Figure 7, in No.1 loading interfaces power supply mutually by B phases power with No. two loading interfaces power supply mutually by A phases are powered.

It is shown in Figure 8, in No. two loading interfaces power supply mutually by C phases power with No. three loading interfaces power supply mutually by B phases are powered.

(2), itself switching breakdown judge process of combination switch includes reverse-blocking tetrode thyristor K_bCan not conducting failure, magnetic Guard relay switchs K_cCan not close failure, magnetic latching relay switch K_cCan not disconnect failure and reverse-blocking tetrode thyristor K_b Can not turn off failure；

When putting into combination switch, it is assumed that reverse-blocking tetrode thyristor K_bEnergy normally, and reverse-blocking tetrode thyristor K_bIt has been on shape State and magnetic latching relay switch K_cOn the premise of being off,

Example 2, the difference with example 1 are：

Referring to shown in Fig. 1, Fig. 9 and Figure 10, No.1 loading interfaces 811 are quick connector, and quick connector includes plug 34 and housing 39, it is fixed with insulation tube 31 upwards on the upper surface of housing, is equipped with the outer tube wall of insulation tube and control The pressure sensor 32 of device connection, be fixed with the housing upper surface that insulation tube surrounds be connected with the inner cavity of housing 38 it is logical Hole, is fixed with contact pin 37 in through hole, and the lower end of contact pin is located at the interior intracavitary of housing, and the upper end of contact pin is located at insulation tube It is interior；The both ends of a piece conducting wire 30 are conductively connected on the lower end of contact pin and node J6 respectively；Plug includes insulation intubation 36 and sets Put the contact tube 35 in insulation intubation；The internal diameter of insulation intubation is matched with the outside diameter of insulation tube, the diameter and contact tube of contact pin Internal diameter matching；The structure of No. two loading interfaces 822 and the structure of No. three loading interfaces 833 with No.1 loading interfaces 811 Structure is identical.Cone 33 is equipped with the top of contact pin.

The present embodiment can make the loading interfaces power supply phase malleable of three-phase four-wire power, and can be according to power factor (PF) on three-phase Imbalance carries out that loading interfaces power supply is mutually automatic to be exchanged, safe, good reliability, can autonomous detection combination switch from Body switching failure, intelligence degree are high.

Example 3, the difference with example 1 are：

Referring to shown in Fig. 1 and Figure 11, further including the memory 106 being connected respectively with controller, wireless module 504, address Encoder 507 and server 200.

If loading interfaces power supply phase automatic clearing apparatus has two, the power supply of the two loading interfaces is mutually automatic to exchange dress Mutual wireless signal company can be carried out by respective wireless module by the two loading interfaces power supply phase automatic clearing apparatus by putting Connect；

Above in conjunction with the attached drawing embodiment that the invention has been described, however, the implementation is not limited to the above embodiments, this area Those of ordinary skill can be with various changes and modifications may be made within the scope of the appended claims.

Claims

The phase automatic clearing apparatus 1. loading interfaces are powered, it is characterised in that connect including A phase, B phase, C phase, zero curve N, A connection jaws, B Line mouth, C connection jaws, No.1 loading interfaces (811), No. two loading interfaces (822), No. three loading interfaces (833), controllers (107), node J1, node J2, node J3, node J4, node J5, node J6, node J7 and node J8；

Further include the three-phase activity coefficient monitor (101) being connected respectively with controller, No.1 phase voltage sample circuit (102), No.1 Single-Phase Inverter Source (103), No.1 filter (104), No.1 isolating transformer (105), No.1 loading interfaces voltage are adopted Sample circuit (108), interface power factor monitor (109), No. two phase voltage sample circuits (110), No. two Single-Phase Inverter Sources (1030), No. two filters (1040), No. two isolating transformers (1050), No. two loading interfaces voltage sampling circuits (1080), Switch K1, switch K2, switch K3, switch K4, switch K5, switch K6, switch K7, switch K8, switch K9, switch K10, switch K11, switch K12, switch K13, switch K14, switch K15, switch K16, switch K17, switch K18, switch K19, switch K20 and Switch K21；

The A is connected on the firewire input terminal of A connection jaws, and B is connected on the firewire input terminal of B connection jaws, and C is connected On the firewire input terminal of C connection jaws, the zero curve input terminal of the A connection jaws, the zero curve input terminal of the B connection jaws and described The zero curve input terminal of C connection jaws is connected with zero curve N；

One end of the switch K19, a samplings of a monitoring sides of three-phase activity coefficient monitor, No.1 phase voltage sample circuit End, a sampling ends of No. two phase voltage sample circuits, the one end for switching K1, the output terminal of A connection jaws, the one end for switching K9, switch One end of K13 and one end of switch K15 are connected with node J1 respectively；

One end of the switch K20, the b samplings of the b monitoring sides of three-phase activity coefficient monitor, No.1 phase voltage sample circuit End, the b sampling ends of No. two phase voltage sample circuits, the one end for switching K2, the output terminal of B connection jaws, the one end for switching K8, switch One end of K12 and one end of switch K14 are connected with node J2 respectively；

One end of the switch K21, the c samplings of the c monitoring sides of three-phase activity coefficient monitor, No.1 phase voltage sample circuit End, the c sampling ends of No. two phase voltage sample circuits, the one end for switching K3, the output terminal of C connection jaws, the one end for switching K7, switch One end of K10 and one end of switch K11 are connected with node J3 respectively；

The power output end of the No.1 isolating transformer, the sampling end of No.1 loading interfaces voltage sampling circuit, switch K4's One end of one end, the one end for switching K5 and switch K6 is connected with node J4 respectively；

The power output end of No. two isolating transformers, the sampling end of No. two loading interfaces voltage sampling circuits, switch K16 One end of one end, the one end for switching K17 and switch K18 is connected with node J5 respectively；

The other end of the switch K4, the other end for switching K9, the other end for switching K10, the other end, the interface work(for switching K14 The No.1 monitoring side of rate factor monitor and No.1 loading interfaces are connected with node J6 respectively；

The other end of the switch K5, the other end for switching K8, the other end for switching K11, the other end, the interface work(for switching K15 No. two monitoring sides of rate factor monitor and No. two loading interfaces are connected with node J7 respectively；

The other end of the switch K6, the other end for switching K7, the other end for switching K12, the other end, the interface work(for switching K13 No. three monitoring sides of rate factor monitor and No. three loading interfaces are connected with node J8 respectively；

Electricity of the other end of the other end of the switch K1, the other end for switching K2 and switch K3 with No.1 Single-Phase Inverter Source Source input terminal connection, the input terminal of the No.1 filter is connected on the power output end of No.1 Single-Phase Inverter Source, described The output terminal of No.1 filter is connected on the power input of No.1 isolating transformer；

The other end of the switch K19, the other end for switching K20 and switch the other end of K21 with No. two Single-Phase Inverter Sources Power input connection, the input terminal of No. two filters is connected on the power output end of No. two Single-Phase Inverter Sources, The output terminal of No. two filters is connected on the power input of No. two isolating transformers；

The switch K1, switch K2, switch K3, switch K7, switch K8, switch K9, switch K10, switch K11, switch K12, open It is the identical combination switch of circuit structure to close K13, switch K14, switch K15, switch K19, switch K20 and switch K21；

The combination switch includes No.1 node (701), No. two nodes (702), node Ms_a, node M_b, inductance L_a, capacitance C_a, electricity Hold C₂, diode D₁, diode D₂, diode D₃, diode D₄, photoelectrical coupler OPT, resistance R₀, resistance R₁, resistance R₂, switching Switch K_a, Magnetic driving electric power road (502), silicon drive circuit (503), from electricity consumption power supply module (901) and ground terminal SGND,

The controller (107) includes pulse counter (805)；The switching switch K_aIncluding reverse-blocking tetrode thyristor K_bProtected with magnetic Hold relay switch K_c, the photoelectrical coupler OPT includes light emitting diode D₅With phototriode Q₀；

The reverse-blocking tetrode thyristor K_bOne end and magnetic latching relay switch K_cOne end be connected respectively with No.1 node, it is described can Control transwitch K_bThe other end, resistance R1 one end and inductance L_aOne end respectively with node M_aConnection, the inductance L_aIt is another End, magnetic latching relay switch K_cThe other end, resistance R2 one end and capacitance C_aOne end respectively with node M_bConnection, it is described Capacitance C_aThe other end be connected on No. two nodes, the other end of resistance R1 and capacitance C₂One end connection, the diode D₁'s Positive terminal and diode D₃Negative pole end be connected to capacitance C₂The other end on, the diode D₂Positive terminal and two poles Pipe D₄Negative pole end be connected to resistance R₂The other end on, the diode D₁Negative pole end and diode D₂Negative pole end It is connected to light emitting diode D₅Positive terminal on, the diode D₃Positive terminal and diode D₄Positive terminal connect respectively It is connected on light emitting diode D₅Negative pole end on, the phototriode Q₀Collector terminal respectively with resistance R₀One end and control Device connects, the phototriode Q₀Emitter be connected with signal ground end SGND, it is described from electricity consumption power supply module respectively with Resistance R₀The other end, Magnetic driving circuit, silicon drive circuit connected with controller, the silicon drive circuit is opened with silicon-controlled respectively Close K_bControl terminal connected with controller, the Magnetic driving circuit respectively with magnetic latching relay switch K_cControl terminal and control Device connects；

The No.1 node (701) can only be conducted with wherein one in A phases, B phases and C phases this three-phases in discontinuity surface when same Connection；No. two nodes (702) are connected on zero curve N.
The phase automatic clearing apparatus 2. loading interfaces according to claim 1 are powered, it is characterised in that the No.1 load connects Mouth (811) is quick connector, and the quick connector includes plug (34) and housing (39), on the upper surface of housing upwards Insulation tube (31) is fixed with, the pressure sensor (32) being connected with controller is equipped with the outer tube wall of insulation tube, is being insulated The through hole being connected with the inner cavity of housing (38) is fixed with the housing upper surface that pipe surrounds, contact pin is fixed with through hole (37), and the lower end of contact pin is located at the interior intracavitary of housing, and the upper end of contact pin is located in insulation tube；The both ends of a piece conducting wire (30) It is conductively connected respectively on the lower end of contact pin and node J6；The plug includes insulation intubation (36) and is arranged in insulation intubation Contact tube (35)；The internal diameter of insulation intubation is matched with the outside diameter of insulation tube, and the diameter of contact pin is matched with the internal diameter of contact tube；Institute State No. two loading interfaces (822) structure and No. three loading interfaces (833) structure with the No.1 loading interfaces (811) structure is identical.
The phase automatic clearing apparatus 3. loading interfaces according to claim 1 are powered, it is characterised in that further include respectively with control Memory (106), wireless module (504), address scrambler (507) and the server (200) of device connection processed.
4. a kind of control method of loading interfaces power supply phase automatic clearing apparatus suitable for described in claim 1, its feature exist In the control method includes itself switching breakdown judge process of combination switch, itself switching failure of the combination switch Deterministic process includes reverse-blocking tetrode thyristor K_bCan not conducting failure, magnetic latching relay switch K_cCan not close failure, magnetic keep Relay switch K_cCan not disconnect failure and reverse-blocking tetrode thyristor K_bCan not turn off failure；

(4-1) judges reverse-blocking tetrode thyristor K_bFor can not the process of conducting failure be：

When putting into combination switch, it is assumed that reverse-blocking tetrode thyristor K_bIt is off state, and magnetic latching relay switch K_cIt is also at disconnected On the premise of open state,

(4-1-1) is first from controller to reverse-blocking tetrode thyristor K_bConductivity control signal is sent, controller waits reverse-blocking tetrode thyristor K_bFortune The start pulse signal that row detection circuit returns, and counted with the pulse counter of controller into line triggering pulse, when delay is set After fixing time, if the trigger pulse number that controller receives is when setting more than number, you can think reverse-blocking tetrode thyristor K_b Energy normally, if the trigger pulse number that controller receives is less than setting number,

(4-1-2) is again from controller to reverse-blocking tetrode thyristor K_bConductivity control signal is sent, and pulse counter is reset, is prolonged again When setting time after, if the trigger pulse number that receives of controller is still less than setting number, you can judge that this silicon-controlled is opened Close K_bFor can not conducting failure；

(4-2) judges that magnetic latching relay switchs K_cIt is for the process of failure can not be closed：

When putting into combination switch, it is assumed that reverse-blocking tetrode thyristor K_bEnergy normally, and reverse-blocking tetrode thyristor K_bIt is in the conduction state and Magnetic latching relay switchs K_cOn the premise of being off,

(4-2-1) first switchs K from controller to magnetic latching relay_cClosure control signal is sent, and pulse counter is reset, After the delay adjustments time, if controller receives reverse-blocking tetrode thyristor K_bTrigger pulse number set number more than when,

(4-2-2) switchs K from controller to magnetic latching relay again_cDisconnection control signal is sent, and pulse counter is reset, Again after the delay adjustments time, if controller receives reverse-blocking tetrode thyristor K_bTrigger pulse number also set number more than when,

(4-2-3) switchs K from controller to magnetic latching relay again_cClosure control signal is sent, and pulse counter is clear Zero, again after the delay adjustments time, at this time if controller receives reverse-blocking tetrode thyristor K_bTrigger pulse count still setting When more than number, you can judge that the magnetic latching relay switchs K_bFor failure can not be closed；

(4-3) judges that magnetic latching relay switchs K_cIt is for the process of failure can not be disconnected：

When cutting off combination switch, it is assumed that reverse-blocking tetrode thyristor K_bEnergy normally, and reverse-blocking tetrode thyristor K_bBe off and Magnetic latching relay switchs K_cOn the premise of being in closure state,

(4-3-1) is first from controller to reverse-blocking tetrode thyristor K_bConductivity control signal is sent by reverse-blocking tetrode thyristor K_bConducting, and be delayed and set Fix time and allow reverse-blocking tetrode thyristor K_bAfter reliable conducting, and K is switched from controller to magnetic latching relay_cDisconnection control signal is sent, And reset pulse counter, after waiting setting time, if controller receives reverse-blocking tetrode thyristor K_bTrigger pulse number it is small When number is set；

(4-3-2) switchs K from controller to magnetic latching relay again_cDisconnection control signal is sent, and pulse counter is reset, After again waiting for setting time, if controller receives reverse-blocking tetrode thyristor K_bTrigger pulse number still less than setting number when, It can determine whether that magnetic latching relay switchs K_cFor failure can not be disconnected；

(4-4) judges reverse-blocking tetrode thyristor K_bIt is for the process of failure can not be turned off：

When cutting off combination switch, it is assumed that magnetic latching relay switchs K_cCan normally it disconnect, and magnetic latching relay switch K_cLocate In off-state and reverse-blocking tetrode thyristor K_bOn the premise of also in conducting state,

(4-4-1) is first from controller to reverse-blocking tetrode thyristor K_bShut-off control signal is sent, and pulse counter is reset, delay is set After fixing time, if controller receives reverse-blocking tetrode thyristor K_bTrigger pulse number set number more than when；

(4-4-2) is again from controller to reverse-blocking tetrode thyristor K_bShut-off control signal is sent, and pulse counter is reset, is prolonged again When setting time after, if controller receives reverse-blocking tetrode thyristor K_bTrigger pulse number still set number more than when, you can Judge reverse-blocking tetrode thyristor K_bFor failure can not be turned off.
5. a kind of control method of loading interfaces power supply phase automatic clearing apparatus suitable for described in claim 1, its feature exist In the control method includes the mutually automatic exchange process of loading interfaces power supply, the mutually automatic exchange process of the loading interfaces power supply It is as follows：

(5-1) sets power factor P_AC=| | A phase power factors |-| the power factor of C phases | |, power factor P_AB=| | A phase power Factor |-| the power factor of B phases | |, power factor P_BC=| | B phase power factors |-| the power factor of C phases | |；

(5-2) three-phase activity coefficient monitor carries out power factor balance respectively in setting time interval to A phases, B phases and C phases Monitoring, and the monitoring data of every phase are uploaded to controller respectively, what controller immediately uploaded three-phase activity coefficient monitor Monitoring data carry out calculating processing；

If controller obtains current power factor after carrying out calculating processing to the monitoring data that three-phase activity coefficient monitor uploads Maximum be mutually A phases, and current power factor minimum is mutually C phases, and power factor P at this time_ACMore than setting value P₀When, then It needs to be determined that go out No.1 loading interfaces, No. two loading interfaces and No. three loading interfaces be respectively currently by A phases, B phases and C phases this three Which in phase is mutually powered to it；

(5-3) controller sends interface monitor instruction to interface power factor monitor immediately, and interface power factor monitor is stood It is carried out at the same time monitoring to the power factor in No.1 loading interfaces, No. two loading interfaces and No. three loading interfaces, and by No.1 Monitoring data in loading interfaces, No. two loading interfaces and No. three loading interfaces are uploaded to controller respectively, and controller is right immediately The monitoring data that interface power factor monitor uploads carry out calculating processing；

One can be determined respectively after the monitoring data that controller uploads interface power-factor monitoring device carry out calculating processing Number loading interfaces, No. two loading interfaces and No. three loading interfaces are currently by which phase in A phases, B phases and C phases this three-phases respectively It is powered to it；

If determining at this time, the power supply in No.1 loading interfaces is mutually powered by A phases, and the power supply in No. two loading interfaces is mutually supplied by B phases Electricity, the power supply in No. three loading interfaces are mutually powered by C phases, then switch K7, switch K8 and switch K9 at this time are in closed form State, switch K1 at this time, switch K2, switch K3, switch K4, switch K5, switch K6, switch K10, switch K11, switch K12, open Close K13, switch K14, switch K15, switch K16, switch K17 and switch K18 and be in off-state, No.1 phase voltage at this time The sample trap cutter spacing of sample circuit is on d ends, and the sample trap cutter spacing of No. two phase voltage sample circuits is on d ends；

(5-4) is that the absolute value for making power factor in A phases, B phases and C phases two-by-two after the difference of absolute value is less than setting value P0, then Need the power supply in No.1 loading interfaces mutually powering change as being powered by C phases by A phases, power supply in No. two loading interfaces phase still by B phases are powered, and the power supply in No. three loading interfaces mutually powers change to be powered by A phases by C phases；

Power supply in No.1 loading interfaces mutually by A phases is powered change to be powered by C phases and by the confession in No. three loading interfaces by (5-5) Electric mutually powered by C phases becomes that mutually exchange process is as follows automatically for the loading interfaces power supply powered by A phases：

(5-5-1) first, allows the sampling plug-in strip of No.1 phase voltage sample circuit to be connected to a samplings of No.1 phase voltage sample circuit It is connected on end with A, the voltage signal of No.1 phase voltage sample circuit collection A phases is simultaneously uploaded to controller；

Then, switch K1 closures are allowed No.1 Single-Phase Inverter Source is connected with A；Under the control of the controller, No.1 is single-phase inverse Variable power source output voltage signal with the voltage signal of A phases as reference, with No.1 Single-Phase Inverter Source export voltage signal As feedback signal, No.1 closed-loop control is formed, No.1 drive signal is produced in the controller, makes No.1 Single-Phase Inverter Source defeated The No.1 voltage waveform gone out exports stable No.1 sine by No.1 isolating transformer again after first passing through the filtering of No.1 filter Ripple power supply, and make the No.1 sine-wave power that No.1 isolating transformer exports and the same amplitude of A phase voltages under the control of the controller Same-phase；

Then, be closed at switch K4 and disconnect switch K9, at this time the state of the power supply phase in No.1 loading interfaces still with A phases On power supply phase state it is identical；

Then, still allow switch K1 to close, allow the sampling plug-in strip of No.1 phase voltage sample circuit to be connected to the sampling of No.1 phase voltage It is connected on the c sampling ends of circuit with C, the voltage signal of No.1 phase voltage sample circuit collection C phases is simultaneously uploaded to controller；Control Device processed uses phase shifting control, make No.1 Single-Phase Inverter Source export voltage signal with the voltage signal of C phases as reference, with one The voltage signal of number Single-Phase Inverter Source output forms new No.1 closed-loop control, produces in the controller as feedback signal The No.1 drive signal of SPWM, after making the No.1 voltage waveform that No.1 Single-Phase Inverter Source exports first pass through the filtering of No.1 filter Again by the stable No.1 sine-wave power of No.1 isolating transformer output, and No.1 is set to isolate transformation under the control of the controller State of the No.1 sine-wave power of device output with C phase voltages with amplitude same-phase, at this time the power supply phase in No.1 loading interfaces It is identical with the state of the power supply phase in C phases；

(5-5-2) similarly, allows the sampling plug-in strip of No. two phase voltage sample circuits to be connected to the c samplings of No. two phase voltage sample circuits It is connected on end with C, the voltage signal of No. two phase voltage sample circuit collection C phases is simultaneously uploaded to controller；

Then, switch K21 closures are allowed No. two Single-Phase Inverter Sources is connected with C；Under the control of the controller, No. two it is single-phase inverse The voltage signal of variable power source output with the voltage signal of C phases as reference, with the voltage signal of No. two Single-Phase Inverter Sources output As feedback signal, No. two closed-loop controls are formed, No. two drive signals is produced in the controller, makes No. two Single-Phase Inverter Sources defeated No. two voltage waveforms gone out export No. two stable sines by No. two isolating transformers again after first passing through No. two filter filterings Ripple power supply, and make No. two sine-wave powers and the same amplitude of C phase voltages of No. two isolating transformer output under the control of the controller Same-phase；

Then, be closed at switch K18 and disconnect switch K7, at this time the state of the power supply phase in No. three loading interfaces also with C phases On power supply phase state it is identical；

Then, still allow switch K21 to close, allow the sampling plug-in strip of No. two phase voltage sample circuits to be connected to No. two phase voltages samplings It is connected on a sampling ends of circuit with A, the voltage signal of No. two phase voltage sample circuit collection A phases is simultaneously uploaded to controller；Control Device processed uses phase shifting control, make the voltage signal of No. two Single-Phase Inverter Sources output with the voltage signal of A phases as reference, with two The voltage signal of number Single-Phase Inverter Source output forms No. two new closed-loop controls, produces in the controller as feedback signal No. two drive signals of SPWM, after making No. two voltage waveforms of No. two Single-Phase Inverter Source outputs first pass through No. two filter filterings Again by No. two stable sine-wave powers of No. two isolating transformer output, and make No. two isolation transformations under the control of the controller State of No. two sine-wave powers of device output with A phase voltages with amplitude same-phase, at this time the power supply phase in No. three loading interfaces It is identical with the state of the power supply phase in A phases；

(5-5-3) then, is closed at switch K10, disconnects switch K4, closure switch K13 and disconnects switch K18, at this time No.1 Power supply in loading interfaces is mutually powered by C phases completely, and the power supply in No. three loading interfaces is mutually powered by A phases completely；

(5-5-4) finally, the sample trap knife of No.1 phase voltage sample circuit is turned on d ends, by No. two phase voltage sampling electricity The sample trap knife on road is turned on d ends, is disconnected switch K1 and is disconnected switch K21, so that No.1 phase voltage sample circuit, No.1 Single-Phase Inverter Source, No.1 filter, No.1 isolating transformer, No. two phase voltage sample circuits, No. two Single-Phase Inverter Sources, two Number filter and No. two isolating transformers exit the operation that loading interfaces power supply mutually exchanges automatically；

(5-5-5) so far, by the power supply in No.1 loading interfaces mutually powers change to be powered by C phases and being connect No. three loads by A phases Power supply on mouth is mutually powered to become by C phases to be terminated into the automatic exchange process of loading interfaces power supply phase powered by A phases；

(5-5-6) similarly, by the power supply phase in No.1 loading interfaces, the power supply phase in No. two loading interfaces and No. three loading interfaces On power supply mutually the principle that is exchanged two-by-two with the power supply in No.1 loading interfaces is mutually powered by A phases become to be powered by C phases and By in No. three loading interfaces power supply mutually by C phases power change into the principle powered by A phases it is identical.
6. a kind of control method of loading interfaces power supply phase automatic clearing apparatus suitable for described in claim 3, its feature exist In if loading interfaces power supply phase automatic clearing apparatus has two, the two loading interfaces power supply phase automatic clearing apparatus is The two loading interfaces power supply phase automatic clearing apparatus can be carried out by mutual wireless signal connection by respective wireless module；

When only one of which loading interfaces in three loading interfaces in first loading interfaces power supply phase automatic clearing apparatus Load is connected with, and only two of which is born in three loading interfaces in second loading interfaces power supply phase automatic clearing apparatus When load interface is connected with load；

If this loading interfaces of first loading interfaces power supply phase automatic clearing apparatus determine it is after being powered by A phases, to allow The two loading interfaces of second loading interfaces power supply phase automatic clearing apparatus are powered by B phases respectively powers with C phases.