CN104518564A - Backup automatic switching apparatus with area automatic switching function, and backup automatic switching method - Google Patents
Backup automatic switching apparatus with area automatic switching function, and backup automatic switching method Download PDFInfo
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Abstract
The invention discloses a backup automatic switching apparatus with an area automatic switching function, used for a power supply system of a dual-source serial supply structure. The backup automatic switching apparatus comprises an area backup automatic switching device and a plurality of acquisition and execution units, the area backup automatic switching device is configured at any one power supply station or any one serial supply transformer station, the plurality of acquisition and execution units are respectively arranged at two power supply stations and each serial supply transformer station, and all the acquisition and execution units respectively interact real-time information with the area backup automatic switching device through a fiber communication network; and each acquisition and execution unit acquires analog quantity information of the station corresponding to each acquisition and execution unit, after converting the analog quantity information into switching quantity information, uploads the switching quantity information to the area backup automatic switching device, at the same time, receives switching-off and switching-on commands transmitted down by the area backup automatic switching device and executes switching-off and switching-on motion. By using the backup automatic switching apparatus provided by the invention, power supply can be quickly recovered for a power-off serial supply transformer station through switching-off and switching-on operation at a time when any one serial supply switch is taken as an open loop point. The invention also discloses a backup automatic switching method for a backup automatic switching apparatus with an area automatic switching function.
Description
Technical field
The present invention relates to a kind of automatic switching device of electric power system power transmission and distribution, particularly a kind of microcomputer type automatic switching device of standby power supply and method.
Background technology
In recent years, backup auto-activating device is used widely in the electrical network of 220kV and following grade, in the maintenance stabilization of power grids with improve in power supply reliability etc. and serve important function.
Backup auto-activating device wants to play a role, and must have stand-by power supply and the backup circuit breaker being in hot stand-by duty.When working power dead electricity, the switch of the former working power of backup auto-activating device tripping, the switch of the stand-by power supply that closes, realizes the fast automatic input of stand-by power supply, for transformer station restores electricity.The backup circuit breaker being in hot stand-by duty of stand-by power supply is generally called open loop point, only has and there is open loop point, could realize prepared auto restart.Duplicate supply statements based on collusion structure is a kind of electric power-feeding structure common in 110kV electrical network, power to several statements based on collusion transformer stations be cascaded middle by two power stations, in order to suppress short circuit current during Electromagnetic coupling, adopt open loop operation mode, namely one of them statements based on collusion switch is opened, after open loop operation, short circuit current can reduce really, but each statements based on collusion transformer station becomes is powered by single power station, power supply reliability reduces, in this case need to install backup auto-activating device, using another power station as stand-by power supply, by automatic switching to improve power supply reliability.
If use conventional prepared auto restart, open loop point is there is owing to only having one of them transformer station, there is not open loop point in other transformer station, the transformer station that there is not open loop point can control owing to not having the switch of stand-by power supply, conventional prepared auto restart cannot play a role, cause like this except open loop point place transformer station, even if other are respectively stood and install conventional backup auto-activating device and can not work, do not reach the object that fast recovery of power supply improves power supply reliability.For general remote automatic bus transfer equipment, only can realize the prepared auto restart between Liang Ge transformer station, the main electrical scheme for common multiple transformer stations statements based on collusion then cannot be suitable for.For the region prepared auto restart function be embedded in EMS system, because transfer of data time delay is large, the time of the needs that cause restoring electricity is partially long.Also someone proposed the region prepared auto restart strategy of recover by level; the switch at all dead electricity stations of tripping when statements based on collusion transformer station's dead electricity; close a floodgate step by step again and restore electricity; by after accelerated protection tripping again after He Zhong Library; the switching manipulation that this mode relates to often; restore electricity need time also longer, also can have certain impact to system during He Zhong Library.Above-mentioned method all can not rapidly and accurately for dead electricity transformer station restores electricity.
Summary of the invention
Object of the present invention, be that providing a kind of has backup auto-activating device and the spare power automatic switching method that function is hauled oneself willingly in region, it is applicable to duplicate supply statements based on collusion structure, and can realize arbitrary statements based on collusion switch as being operated by breaker tripping and closing during open loop point can be just dead electricity statements based on collusion transformer station fast recovery of power supply.
In order to reach above-mentioned purpose, solution of the present invention is:
Have the backup auto-activating device that function is hauled oneself willingly in region, for the electric power system of duplicate supply statements based on collusion structure, described duplicate supply statements based on collusion structure comprises two power stations and at least two statements based on collusion transformer stations; Described backup auto-activating device comprises region backup auto-activating device and several collection and performance element, described region backup auto-activating device is configured in any one power station or statements based on collusion transformer station, several collection and performance element are separately positioned on two power stations and transformer station of respectively acting in collusion to make each other's confessions, and all collections and performance element are respectively by Networks of Fiber Communications and the mutual real time information of region backup auto-activating device; Described each collection and performance element gather the analog quantity information at its corresponding station, by Networks of Fiber Communications being delivered to region backup auto-activating device after being converted to on-off model, receiving breaker tripping and closing order that described region backup auto-activating device issues simultaneously and performing breaker tripping and closing action.
Above-mentioned power station adopts transformer station, bus or interconnection power supply.
The collection that above-mentioned each station is corresponding and performance element access the busbar voltage at this station, and the bus according to setting has compression set value and bus definite value with no pressure, and being converted into bus has pressure mark and bus sign switch amount with no pressure signal; Access the electric current of two statements based on collusion inlet wires, according to inlet wire fault current definite value and the inlet wire no flow setpoint of setting, being converted into inlet wire has fault current mark and inlet wire without will on-off model of failing to be sold at auction, and in conjunction with busbar voltage, the angle of calculating voltage and electric current, obtains sense of current mark; Gather the trip position contact of two statements based on collusion switches, for the differentiation of system operation mode; Position contact after the conjunction of collection two statements based on collusion switches, for locking prepared auto restart during hand jumping working power; Gather the actuating signal of bus differential protection, be used for identifying busbar fault; Gather and performance element by above-mentioned each flag bit and each switching value by Networks of Fiber Communications being delivered to region backup auto-activating device, carry out integrated decision-making by region backup auto-activating device.
Based on the spare power automatic switching method there is region as previously mentioned hauling oneself willingly into the backup auto-activating device of function, comprise the steps:
(1) region prepared auto restart adopts discharge and recharge logic, and when system is normally run, a certain statements based on collusion switch is as open loop point, all the other statements based on collusion switches all close a floodgate operation, each substation bus bar voltage all has pressure, puts charging complete, put charge flag through charging setting time rear region prepared auto restart;
(2) after the charging complete of region prepared auto restart, if system has fault to occur, or power station decompression, then region backup auto-activating device selects according to failure condition the statements based on collusion switch being suitable for isolated fault;
(3) through tripping operation time delay, the statements based on collusion switch of the aforementioned selection of tripping of giving an order, trip signal is issued to collection and the performance element execution trip operation of corresponding transformer station by Networks of Fiber Communications, after confirming the tripping of statements based on collusion switch, send through combined floodgate time delay and run circling point statements based on collusion switch command jointly, order of closing a floodgate is issued to the collection of open loop point place transformer station by Networks of Fiber Communications and performance element carries out actual combined floodgate.
After adopting such scheme, the invention has the beneficial effects as follows: the open loop point position of self adaptation duplicate supply statements based on collusion structure, when arbitrary statements based on collusion switch is as open loop point, region backup auto-activating device can identify automatically; Automatically suitable statements based on collusion switch trip can be selected with isolated fault according to system running state, prevent He Zhong Library; The state of comprehensive each transformer station carries out decision-making, simultaneously for the statements based on collusion transformer station of multiple dead electricity restores electricity simultaneously, and can be not limited to the transformer station that there is open loop point; Prepared auto restart course of action only needs breaker tripping and closing to operate, succinctly accurately; No matter the number of statements based on collusion transformer station is how many, this region backup auto-activating device all can be suitable for; Transmit real time information by Networks of Fiber Communications, the region prepared auto restart of multiple transformer station is contained in real realization.
Accompanying drawing explanation
Fig. 1 is the electric power system main electrical scheme schematic diagram that the present invention applies;
Fig. 2 is the logic diagram of region of the present invention prepared auto restart;
Fig. 3 is the schematic diagram of prepared auto restart action situation in region of the present invention.
Embodiment
Below with reference to accompanying drawing, technical scheme of the present invention is described in detail.
The invention provides and a kind of there is the backup auto-activating device that function is hauled oneself willingly in region, be applicable to the electric power system of duplicate supply statements based on collusion structure, shown in figure 1.Power station 1, power station 2 are two power stations, and A station, B station, C station are 3 statements based on collusion transformer stations, and 001-008 is each statements based on collusion switch, and wherein 005 is the open loop point under current operational mode.The scale of the statements based on collusion structure shown in this figure is only a kind of citing, and when the number of act in collusion to make each other's confessions transformer station and statements based on collusion switch increases or reduces, the present invention is still applicable.Duplicate supply in this figure is power station 1, power station 2 in form, for other forms of duplicate supply, I female, II mother of such as same transformer station is respectively as two power supplys, or one of them power supply is interconnection power supply, or two power supplys are all interconnection power supply, and the present invention is still applicable.
Each transformer station (comprising power station and statements based on collusion transformer station) configures one respectively and gathers and performance element, select one of them transformer station to configure a region backup auto-activating device, region backup auto-activating device and each collection and performance element are by the mutual real time information of Networks of Fiber Communications.The analog quantity that every platform collection and performance element need access has: the busbar voltage of our station, the electric current of 2 statements based on collusion inlet wires; The switching value that need access has: the trip position of 2 statements based on collusion switches, close after position, bus bar differential prptection operation signal, blocked region prepared auto restart open into etc.The analog quantity collected is converted into switching value mark by collection and performance element, and the bus according to setting has compression set value, bus definite value with no pressure, and busbar voltage being converted into bus has pressure mark, bus mark with no pressure; According to inlet wire fault current definite value, the inlet wire no flow setpoint of setting, inlet wire current being converted into inlet wire has fault current mark, inlet wire without will of failing to be sold at auction; Utilize busbar voltage, inlet wire current, the angle of calculating voltage and electric current, obtain sense of current mark.Gather and performance element by above-mentioned various flag bit and each switching value by Networks of Fiber Communications being delivered to region backup auto-activating device, carry out integrated decision-making by region backup auto-activating device.
The time delay of Networks of Fiber Communications transmission information can be less than the level of 1 millisecond, and to gather and each analog quantity is converted to switching value by criterion on the spot by performance element, with region backup auto-activating device only mutual switching value information number, greatly can reduce the length of message transmission like this, be conducive to the fast transport of information, in this case, the requirement of real time interaction information can be reached.By mutual real time information, region backup auto-activating device can reach the operate time precision identical with common backup auto-activating device on the spot, the actual act time can reach Millisecond level, the adjusting and can consider according to the setting principle equal with common prepared auto restart of region prepared auto restart operate time.In this case, can also realize coordinating with the equity of common prepared auto restart, such as, have precedence over the rule of low-pressure side prepared auto restart action according to high-pressure side prepared auto restart, if this cover region prepared auto restart is installed on 110kV electric pressure, region prepared auto restart can be adjusted according to preferential action operate time; The operate time that the prepared auto restart of below 110kV electric pressure can be adjusted as being greater than region prepared auto restart operate time, and identical setting principle when coordinating with ordinary high pressure side prepared auto restart can be adopted.
The action logic reference of region backup auto-activating device as shown in Figure 2, mainly contains following several step:
Step 1: discharge and recharge logic.Region backup auto-activating device adopts discharge and recharge logic, after only having charging complete, just can carry out prepared auto restart operation.When meeting all charge conditions, and when meeting without any discharging condition, charging complete after charging setting time, puts Charging Flag.
Charge condition is the relation of "AND", needs to meet all charge conditions simultaneously, charging complete after charging setting time.Charge condition has:
1) two equal three-phases of power station have pressure;
2) the equal three-phase of each statements based on collusion transformer station has pressure;
3) a certain statements based on collusion switch is at open position, and other statements based on collusion switches are all at closing position, and all switches all do not have malposition to report to the police.
Discharging condition is the relation of "or", and meeting any one discharging condition will discharge, and removes Charging Flag.Discharging condition has:
1) open loop point switch closes;
2) region prepared auto restart sends order of closing a floodgate through short time delay;
3) arbitrary operation statements based on collusion switch (after running the conjunction of statements based on collusion switch, position KKJ becomes 0) is jumped in distant jumping, hand;
4) bus of two power stations is all with no pressure, through stand-by power supply discharge lag with no pressure;
5) after region prepared auto restart sends trip signal, switch failure of acting in collusion to make each other's confessions accordingly;
6) the statements based on collusion position of the switch being chosen as pre-trip switch is abnormal;
7) can not receive the collection of arbitrary transformer station and the information performing substation;
8) there is the outside locking input of blocked region prepared auto restart in arbitrary transformer station;
9) receive the collection of a certain transformer station and the communication abnormality information performing substation, this substation can not receive the information of region backup auto-activating device, if open loop point place transformer station, then blocked region prepared auto restart, if not the then not locking of open loop point place transformer station;
10) backup auto-activating device action in region could be charged after crossing and needing manual confirmation again;
11) open loop point place substation bus fault, or open loop point offside station busbar fault;
12) open loop point place line fault;
13) all break down in open loop point both sides;
14) region prepared auto restart function is exited.
Step 2: the selection of Fault Identification and trip switch.When after charging complete; if system has fault to occur; the statements based on collusion switch that protective relaying device action tripping co-bit is run; or power station decompression causes statements based on collusion transformer station dead electricity; then region backup auto-activating device enters fault location logic; select the statements based on collusion switch being suitable for isolated fault, prevent Backup Power Switch combined floodgate mistiming from closing in fault.
Step 3: at localizing faults and after choosing trip switch, through tripping operation time delay, the statements based on collusion switch that tripping of giving an order is selected, collection and the performance element of tripping operation statements based on collusion switch place transformer station carry out actual trip operation, after confirming the tripping of statements based on collusion switch, send through combined floodgate time delay and run circling point statements based on collusion switch command jointly, collection and the performance element of open loop point place transformer station carry out actual closing operation, by breaker tripping and closing operation, the statements based on collusion transformer station that can be embodied as dead electricity restores electricity.
According to the electric power system shown in Fig. 1, and consider that C station bus hangs with small power supply, when system is run for open loop point with 005 switch, consider the action situation of various abort situation lower area prepared auto restart, reference by location Fig. 3 of fault point.
After the prepared auto restart charging complete of region:
1) there is K1 point failure in A-wire, region prepared auto restart tripping 002 switch isolation fault, and close 005 switch afterwards, for A station, B station restore electricity.
2) there is K2 point failure in A station bus, and region prepared auto restart tripping 004 switch isolation fault, close 005 switch afterwards, for B station restores electricity.
3) there is K3 point failure in second line, and region prepared auto restart tripping 004 switch isolation fault, close 005 switch afterwards, for B station restores electricity.
4) there is K4 point failure in B station bus, and region prepared auto restart discharges, and prevents He Zhong Library.
5) there is K5 point failure in C-wire, and region prepared auto restart discharges, and prevents He Zhong Library.
6) there is K6 point failure in C station bus, and region prepared auto restart discharges, and prevents He Zhong Library.
7) there is K7 point failure in fourth line, and region prepared auto restart tripping 007 switch isolation fault, close 005 switch afterwards, for C station restores electricity.
8) power station 1 decompression, region prepared auto restart tripping 002 switch, close 005 switch afterwards, for A station, B station restore electricity.
9) power station 2 decompression, region prepared auto restart tripping 007 switch, close 005 switch afterwards, for C station restores electricity.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.
Claims (4)
1. have the backup auto-activating device that function is hauled oneself willingly in region, for the electric power system of duplicate supply statements based on collusion structure, described duplicate supply statements based on collusion structure comprises two power stations and at least two statements based on collusion transformer stations; It is characterized in that: described backup auto-activating device comprises region backup auto-activating device and several collection and performance element, described region backup auto-activating device is configured in any one power station or statements based on collusion transformer station, several collection and performance element are separately positioned on two power stations and transformer station of respectively acting in collusion to make each other's confessions, and all collections and performance element are respectively by Networks of Fiber Communications and the mutual real time information of region backup auto-activating device; Described each collection and performance element gather the analog quantity information at its corresponding station, by Networks of Fiber Communications being delivered to region backup auto-activating device after being converted to on-off model, receiving breaker tripping and closing order that described region backup auto-activating device issues simultaneously and performing breaker tripping and closing action.
2. a kind of as claimed in claim 1 have the backup auto-activating device that function is hauled oneself willingly in region, it is characterized in that: the collection that described each station is corresponding and performance element access the busbar voltage at this station, bus according to setting has compression set value and bus definite value with no pressure, and being converted into bus has pressure mark and bus sign switch amount with no pressure signal; Access the electric current of two statements based on collusion inlet wires, according to inlet wire fault current definite value and the inlet wire no flow setpoint of setting, being converted into inlet wire has fault current mark and inlet wire without will on-off model of failing to be sold at auction, and in conjunction with busbar voltage, the angle of calculating voltage and electric current, obtains sense of current mark; Gather the trip position contact of two statements based on collusion switches, for the differentiation of system operation mode; Position contact after the conjunction of collection two statements based on collusion switches, for locking prepared auto restart during hand jumping working power; Gather the actuating signal of bus differential protection, be used for identifying busbar fault; Gather and performance element by above-mentioned each flag bit and each switching value by Networks of Fiber Communications being delivered to region backup auto-activating device, carry out integrated decision-making by region backup auto-activating device.
3. a kind of as claimed in claim 1 or 2 have the backup auto-activating device that function is hauled oneself willingly in region, it is characterized in that: described power station adopts transformer station, bus or interconnection power supply.
4., based on the spare power automatic switching method there is region as claimed in claim 1 hauling oneself willingly into the backup auto-activating device of function, it is characterized in that comprising the steps:
(1) region prepared auto restart adopts discharge and recharge logic, and when system is normally run, a certain statements based on collusion switch is as open loop point, all the other statements based on collusion switches all close a floodgate operation, each substation bus bar voltage all has pressure, puts charging complete, put charge flag through charging setting time rear region prepared auto restart;
(2) after the charging complete of region prepared auto restart, if system has fault to occur, or power station decompression, then region backup auto-activating device selects according to failure condition the statements based on collusion switch being suitable for isolated fault;
(3) through tripping operation time delay, the statements based on collusion switch of the aforementioned selection of tripping of giving an order, trip signal is issued to collection and the performance element execution trip operation of corresponding transformer station by Networks of Fiber Communications, after confirming the tripping of statements based on collusion switch, send through combined floodgate time delay and run circling point statements based on collusion switch command jointly, order of closing a floodgate is issued to the collection of open loop point place transformer station by Networks of Fiber Communications and performance element carries out actual combined floodgate.
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| CN105207346A (en) * | 2015-09-10 | 2015-12-30 | 广东电网有限责任公司珠海供电局 | Area backup automatic switch method and system |
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