CN111055748B - Low-voltage mobile energy storage system and control method thereof - Google Patents
Low-voltage mobile energy storage system and control method thereof Download PDFInfo
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- CN111055748B CN111055748B CN201911101823.2A CN201911101823A CN111055748B CN 111055748 B CN111055748 B CN 111055748B CN 201911101823 A CN201911101823 A CN 201911101823A CN 111055748 B CN111055748 B CN 111055748B
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- 229910003460 diamond Inorganic materials 0.000 claims description 3
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- KJLPSBMDOIVXSN-UHFFFAOYSA-N 4-[4-[2-[4-(3,4-dicarboxyphenoxy)phenyl]propan-2-yl]phenoxy]phthalic acid Chemical compound C=1C=C(OC=2C=C(C(C(O)=O)=CC=2)C(O)=O)C=CC=1C(C)(C)C(C=C1)=CC=C1OC1=CC=C(C(O)=O)C(C(O)=O)=C1 KJLPSBMDOIVXSN-UHFFFAOYSA-N 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 5
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/639—Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
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- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Transportation (AREA)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the technical field of power supply equipment, in particular to a low-voltage mobile energy storage system and a control method thereof. The control method comprises the following steps: A) connecting an energy storage vehicle; B) setting load peak and load valley time periods; C) in the load peak time period, the energy storage unit discharges; D) and in the load valley time period, the energy storage unit is charged. The substantial effects of the invention are as follows: by adopting the movable energy storage system, the energy storage device can be flexibly deployed in various application occasions, such as temporary power supply, emergency power supply, power protection and the like, and the benefit of the energy storage device is improved.
Description
Technical Field
The invention relates to the technical field of power supply equipment, in particular to a low-voltage mobile energy storage system and a control method thereof.
Background
In the power supply practice, a phenomenon that a short-term load is greatly increased exists in a part of power supply areas. If a large-capacity transformer is provided, the transformer in the transformer area works in an extremely low load state except for a time period when the short-term load is greatly increased, so that the waste of resources is caused. If the transformer of the transformer area is configured according to the long-term load level of the transformer area, the aging of the transformer area is aggravated and even the damage of the transformer area is caused in the overload working state of the transformer area in the time period of the large-amplitude load lifting of the load.
For example, when a part of villages in Anji county has a large number of users for planting tea trees, the electricity consumption of the part of users is greatly increased every tea frying season, and high load is concentrated at 7 to 12 o' clock in the evening. During the non-tea frying season, the user's load level is restored to a lower level again. The cost for upgrading and transforming the capacity of the transformer in the transformer area is high, and most of the capacity of the transformer in the transformed transformer area is in a waste state in the season of not frying tea. In order to solve the short-term high-load power demand and power supply stability of similar users, it is urgently needed to provide a technology and equipment capable of flexibly providing temporary high-load power supply.
Chinese patent CN109327075A, published 2019, 2, 12, a set of low-voltage energy storage power supply devices, which comprises a low-voltage switch cabinet, a main working power supply and an emergency standby power supply; the main working power supply is an alternating current commercial power which is connected into the low-voltage switch cabinet from the outside, a long bus is communicated in the low-voltage switch cabinet, and the main working power supply is connected to the long bus; a plurality of branch lines for supplying power to each electric device are led out from the long bus; the emergency standby power supply is a storage battery, the storage battery is arranged in the low-voltage switch cabinet, and direct current output by the storage battery is converted into low-voltage alternating current through the inverter, the output transformer, the static switch, the output switch and the first protection switch and then is connected to the long bus; under normal conditions, the main working power supply supplies power for the electric equipment; when an emergency occurs, the main working power supply is cut off, the storage battery is automatically put into use, and a low-voltage alternating-current power supply is continuously provided for the electric equipment. However, it needs to provide a fixed energy storage device on the transformer side, which has a high cost and is only used for emergency power supply, rather than for peak clipping and valley filling.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the technical problem that power supply equipment for temporarily expanding the capacity of a transformer is lacked at present. A low-voltage mobile energy storage system with small investment and flexible use and a control method thereof are provided.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a low-voltage mobile energy storage system is connected with the low-voltage side of a transformer in a transformer area and comprises a butt-joint box, a connecting wire and an energy storage vehicle, wherein the butt-joint box comprises a box body, a state controller, a signal relay, a plug-in base and a voltmeter, the plug-in base and the voltmeter are both installed on the wall of the box body, the plug-in base is connected with the low-voltage side of the transformer in the transformer area through the signal relay, the signal relay and the voltmeter are both connected with the state controller, the connecting wire comprises a wire and hot plug plugs connected to the two ends of the wire, the hot plug plugs are matched with the plug-in base, the energy storage vehicle comprises a vehicle body, a carriage, a plug-in base, a PCS unit, a PCS controller and an energy storage unit, the carriage is installed on the vehicle body, the energy storage unit is installed in the carriage, the PCS, the plug base is connected with the output end of the PCS unit and is installed on the carriage wall. By adopting the movable energy storage system, the energy storage device can be flexibly deployed in various application occasions such as temporary power supply, emergency power supply, power conservation and the like, so that the benefit of the energy storage device is improved; after the load peak stage is finished, the energy storage vehicle is withdrawn, the on-site maintenance is not needed, and the use cost is reduced; direct current of the energy storage unit is converted into alternating current through the PCS unit, an inverter is not needed, deployment cost is reduced, and energy utilization efficiency is improved; the energy storage vehicle is allowed to be connected into the platform zone in the uninterrupted state of the platform zone through the plugging base and the hot plugging plug, social benefits are achieved, and user experience is improved.
Preferably, install two sets of plug bases on the butt joint case and have two sets of signal relay, every group plug base is equallyd divide and is do not connected with platform district transformer low pressure side through a set of signal relay, signal relay all is connected with state controller, internal combustion generating set is still installed to the energy storage car, the energy storage car includes two sets of plug bases, two sets of plug bases respectively with the output and the internal combustion generating set connecting piece of PCS unit. The energy storage unit is used for the load is filled out in the peak clipping, and internal combustion generating set is used for emergent power supply, when the platform district has a power failure, inserts internal combustion generating set and supplies power.
Preferably, the plugging base comprises a flip cover, a mounting seat, an insulating shell, a metal contact sleeve and a core column, the flip cover is rotatably arranged on the mounting seat, the middle part of the mounting seat is provided with a circular hollow, one end of the insulating shell is fixedly arranged in the hollow and is hermetically connected with the hollow, the metal contact sleeve is in a hollow cylindrical shape with one closed end, the outer edge of the metal contact sleeve is abutted against the inner wall of the insulating shell, the core column is concentric with the metal contact sleeve and is fixedly connected with the closed end of the metal contact sleeve, the open end of the metal contact sleeve is close to the mounting seat, the end part of the insulating shell connected with the mounting seat extends inwards to form a protective edge, the protective edge covers the end part of the opening end of the metal contact sleeve, the hot plug comprises an insulating sleeve and a metal contact head, one end of the metal contact head is matched with the shape of the metal contact sleeve, and the other end of the metal contact head is wrapped in the insulating sleeve and is connected with a wire. Flip can protect the plug base not receive the jam of dust, and the safe edge can avoid metal contact cover tip to leak outward, causes the electric leakage hidden danger, and metal contact cover and metal contact butt can transmit the electric energy, accomplish and connect.
Preferably, the metal contact is provided with a clamping groove, the diameter from the clamping groove of the metal contact to the end close to the end of the metal contact sleeve is smaller than the diameter from the clamping groove to the other end of the metal contact, the metal contact sleeve further comprises an elastic sheet, a through hole perpendicular to the central axis of the metal contact is formed in the position, corresponding to the clamping groove, of the metal contact sleeve, holes are formed in two side walls of the metal contact sleeve along the radial direction of the through hole respectively, the elastic sheet is installed in the holes, and the elastic sheet is matched with the clamping groove. The cooperation of shell fragment and draw-in groove can form certain locking force, avoids hot plug to pull out the plug accident and drops. The diameter of the clamping groove of the metal contact head to the end part close to the metal contact sleeve is smaller than the diameter of the clamping groove to the other end of the metal contact head, so that a retraction space can be provided for the elastic sheet.
Preferably, one end of the elastic sheet is cylindrical, the cylindrical end is in interference fit connection with the hole, the other end of the elastic sheet is processed into a flat shape, the flat end of the elastic sheet is wound into a diamond shape, a gap is formed between the tail end of the diamond-shaped elastic sheet and the middle of the elastic sheet, and the longer edge of the flat end of the elastic sheet is in the normal direction of the central axis of the metal contact sleeve. The elastic sheet can provide locking force and is convenient to install.
Preferably, the metal contact head is provided with an electrified locking groove, the metal contact sleeve further comprises an electrified locking device, a locking hole is formed in the position of the metal contact sleeve corresponding to the electrified locking groove, the locking hole penetrates through the wall of one side of the metal contact sleeve, the insulating shell is provided with a cavity for accommodating the electrified locking device, the electrified locking device comprises a mounting ring, a spring, a pin, a magnetic cap, a magnetic ring, a resistor R1, a resistor R2, a capacitor C and a diode D1, the mounting ring and the locking hole are concentric and fixedly mounted on the outer wall of the metal contact sleeve close to the locking hole, one end of the pin penetrates through the mounting ring and extends into the locking hole, the other end of the pin is fixedly connected with the magnetic cap, a slope is formed on one side of the pin close to the opening end of the metal contact sleeve, the spring is mounted between the magnetic cap and the mounting ring, and two ends of the spring are respectively and fixedly connected with the magnetic cap, the spring is in a compression state, the magnetic ring is sleeved on the outer side of the pin and located between the magnetic cap and the mounting ring, the magnetic ring is fixedly connected with the insulating shell, attractive force is formed between the magnetic ring and the magnetic cap, one end of the spring is connected with one end of a resistor R1 through a lead, the other end of the resistor R1 is grounded, one end of a resistor R2 is connected with one end of a capacitor C1, the other end of the resistor R2 is grounded, the other end of the capacitor C1 is connected with the other end of the spring and the cathode of a diode D1, and the anode of a.
The working process of the preferred scheme is as follows: when the metal contact sleeve is electrified, alternating current is generated, the alternating current is rectified by a diode D1 and passes through a capacitor C1 and a resistor R2, partial voltage is generated on a resistor R2 and acts on a spring and a resistor R1, current passes through the spring and the resistor R1, the current is alternating current, when the current passes through the spring, the spring can contract, namely the external output elastic force of the compressed spring is weakened, under the action of the attraction force of the magnetic cap and the magnetic ring, the magnetic cap is close to the magnetic ring and drives the pin to move downwards, the tail end of the pin is clamped into an electrified locking groove, although the alternating current can enable the elastic force of the spring to generate vibration, under the action of the attraction force of the magnetic cap and the magnetic ring, the pin holding position can be maintained, and the capacitor C1 can weaken the fluctuation of the; when the metal contact sleeve is completely uncharged, the electric energy stored in the capacitor C1 and the spring is completely released, the elastic force output by the spring outwards is recovered, the elastic force overcomes the attraction force between the magnetic cap and the magnetic ring, the pin is driven to move upwards, the pin is separated from the electrified locking groove, and the hot plug can be pulled out.
When the hot plug is not inserted into the plug socket, if the plug socket is electrified, the pin can move downwards and is located at the locking position, however, a slope is machined on one side of the pin close to the opening end of the metal contact sleeve, and the hot plug can be inserted into the plug socket by applying force slightly under the action of the slope, so that hot connection is realized.
The state controller is used for controlling the corresponding signal relay to be disconnected when the plug is pulled out in a charged state, the PCS controller is used for controlling the energy storage unit not to output voltage, the specific state controller and the PCS controller are controlled through communication with the state controller and the PCS controller and preset programs, the prior art can solve the problem, generally, the problem is safety consideration, and the hot plug cannot be pulled out in the charged state. The hot plug refers to connection and extraction of a platform zone under a non-power-off state, and does not refer to connection and extraction of a hot plug under a charged state.
Preferably, a groove surrounding the insulating sleeve is processed at the abutting position of the insulating sleeve and the insulating shell, a rubber ring is sleeved in the groove, and the rubber ring abuts against the plugging base when the hot plugging plug is inserted into the plugging base. The rubber ring can provide sealedly, avoids dust and rainwater to get into, improves the security.
Preferably, the butt joint box is provided with an indicator light, and the indicator light respectively indicates whether each group of plugging bases is electrified or not; the butt joint box further comprises a box door, the box door is connected with the box body in a hinged mode, the position of the box door corresponding to the voltmeter and the indicating lamp is hollowed out, a transparent plate is embedded in the position of the box door corresponding to the voltmeter and the indicating lamp, a box door lock is installed on the box door, and the position of the box body corresponding to the box door lock is machined to be matched with the box door lock and a lock hole. The pilot lamp can instruct electrified condition, improves the security.
As preferred, the pilot lamp is located near the voltmeter, the chamber door has mutually independent last chamber door and lower chamber door, it all is connected with the box is articulated to go up chamber door and lower chamber door, it covers to go up the chamber door voltmeter and pilot lamp, lower chamber door cover the plug base, it corresponds voltmeter and the position fretwork of pilot lamp and inlays and has the transparent plate to go up the chamber door, go up chamber door and lower chamber door and all install the chamber door lock, the position processing that the chamber body corresponds the chamber door lock has with chamber door lock cooperation and lockhole. The door is arranged into an upper door and a lower door, so that the safety can be improved.
A method for controlling the low-voltage mobile energy storage system includes: A) connecting a plugging base of the energy storage vehicle with the butt joint box through a connecting wire; B) setting clocks in the state controller and the PCS controller, and setting load peak time and load valley time periods; C) when the station transformer is in a load peak time period, the state controller controls the signal relay to be closed, so that the energy storage unit is connected with the low-voltage side of the station transformer through the PCS unit, and the PCS controller controls the PCS unit to enable the PCS unit to output alternating current matched with the low-voltage side of the station transformer; D) when the energy storage unit is in the load valley time period, the state controller controls the signal relay to be closed, and the PCS controller controls the PCS unit to enable the energy storage unit to be in a charging state until the energy storage unit is full or the load underestimation time period is finished; E) namely not in the peak load time period and not in the underestimation load time period, the state controller controls the signal relay to be switched off.
The substantial effects of the invention are as follows: by adopting the movable energy storage system, the energy storage device can be flexibly deployed in various application occasions such as temporary power supply, emergency power supply, power conservation and the like, so that the benefit of the energy storage device is improved; after the load peak stage is finished, the energy storage vehicle is withdrawn, the on-site maintenance is not needed, and the use cost is reduced; direct current of the energy storage unit is converted into alternating current through the PCS unit, an inverter is not needed, deployment cost is reduced, and energy utilization efficiency is improved; the energy storage vehicle is allowed to be connected into the platform area in a non-power-off state in the platform area through the plugging base and the hot plugging plug, so that social benefits are achieved, and user experience is improved; the hot plug can be prevented from being mistakenly pulled out in a live state through the live locking device, and the safety of the mobile energy storage system is improved.
Drawings
Fig. 1 is a schematic diagram of a low-voltage mobile energy storage system according to an embodiment.
Fig. 2 is a schematic diagram of electrical connections of a low-voltage mobile energy storage system according to an embodiment.
Fig. 3 is a schematic partial structure diagram of an energy storage vehicle according to an embodiment.
Fig. 4 is a schematic diagram of a plug receptacle connector according to an embodiment.
Fig. 5 and 6 are schematic diagrams illustrating the hot-pluggable plug and the pluggable base according to the embodiment.
Fig. 7 is a flowchart illustrating a method for controlling a low-voltage mobile energy storage system according to an embodiment.
Fig. 8 is a schematic structural view of a hot-pluggable plug and a hot-pluggable base according to a second embodiment of the present invention.
Fig. 9 is a schematic diagram illustrating a connection between a PCS unit and an energy storage unit in the prior art.
Wherein: 1. the transformer, 2, butt joint case, 3, plug base, 4, energy storage car, 5, hot plug, 7, load, 31, insulating casing, 32, metal contact cover, 33, flip, 34, mount pad, 35, stem, 36, shell fragment, 41, extension power supply line, 42, direct board, 43, power supply line, 51, wire, 52, insulating cover, 53, metal contact, 54, electrified locking groove, 55, draw-in groove, 61, collar, 62, spring, 63, pin, 64, magnetic cap, 65, magnetic ring, 300, signal relay, 400, voltmeter, 500, status controller, 601, PCS unit, 602, PCS controller, 700, energy storage unit, 800, internal combustion generator set.
Detailed Description
The following provides a more detailed description of the present invention, with reference to the accompanying drawings.
The first embodiment is as follows:
a low-voltage mobile energy storage system is connected with a low-voltage side of a transformer 1 of a transformer area, the low-voltage side of the transformer 1 of the transformer area is connected with a load 7, hereinafter the load and a user are the same as the load 7, as shown in figure 1, the embodiment comprises a butt joint box 2, a connecting wire 51 and an energy storage vehicle 4, the butt joint box 2 comprises a box body, a state controller 500, a signal relay 300, a plug base 3 and a voltmeter 400, the plug base 3 and the voltmeter 400 are both installed on the wall of the box body, the plug base 3 is connected with the low-voltage side of the transformer 1 of the transformer area through the signal relay 300, the signal relay 300 and the voltmeter 400 are both connected with the state controller, the connecting wire 51 comprises a wire 51 and hot plug plugs 5 connected with the two ends of the wire 51, the hot plug plugs 5 are matched with the plug base 3, as shown in figure 2, the energy storage vehicle 4 comprises a, The car is mounted on the car body, the energy storage unit 700 is mounted in the car, the PCS unit 601 is connected with the energy storage unit 700, the PCS controller 602 is connected with the PCS unit 601, the plug base 3 is connected with the output end of the PCS unit 601, and the plug base 3 is mounted on the wall of the car. As shown in fig. 3, the rear portion of the car is provided with a plurality of power output interfaces, including extension power supply line 41, direct board 42, two sets of plug bases 3 and power supply line 43, extension power supply line 41 and power supply line 43 provide single-phase alternating current, direct board 42 is the wiring board that adopts bolted connection, direct board 42 can provide three-phase alternating current, and each set of plug bases 3 can provide three-phase alternating current. As shown in fig. 9, there is a technology in the prior art that a plurality of energy storage units 700 providing dc power directly output three-phase ac power through a PCS unit 601 and a PCS controller 602, and this patent only adopts this technology without any changes and improvements to this technology, and therefore, it is not described in detail. The extension power supply line 41 and the power supply line 43 may be connected to one of the outputs of the PCS unit 601.
Install two sets of plug bases 3 and have two sets of signal relay 300 on the butt joint case 2, every plug base 3 of group is equallyd divide and is do not connected with platform district transformer 1 low-voltage side through a set of signal relay 300, and signal relay 300 all is connected with state controller 500, and internal combustion generator set 800 is still installed to energy storage car 4, and energy storage car 4 includes two sets of plug bases 3, two sets of plug bases 3 respectively with PCS unit 601's output and internal combustion generator set 800 connecting piece. The energy storage unit 700 is used for peak clipping and valley filling, the internal combustion generator set 800 is used for emergency power supply, and when the platform area has power failure, the internal combustion generator set 800 is connected to supply power.
As shown in fig. 4, the plug base 3 includes a flip cover 33 and a mounting seat 34, insulating casing 31, metal contact cover 32 and stem 35, flip 33 rotates and installs on mount pad 34, mount pad 34 middle part has circular fretwork, insulating casing 31 one end fixed mounting in the fretwork and with fretwork sealing connection, metal contact cover 32 is one end confined hollow cylinder, metal contact cover 32 outer fringe and insulating casing 31 inner wall butt, stem 35 and metal contact cover 32 concentric and with the blind end fixed connection of metal contact cover 32, the open end of metal contact cover 32 is close to mount pad 34, the tip that insulating casing 31 and mount pad 34 are connected inwards extends there is the safe edge, the safe edge covers the tip of the open end of metal contact cover 32, hot plug 5 includes insulating cover 52 and metal contact 53, metal contact 53 one end matches with metal contact cover 32 shape, the other end parcel of metal contact 53 is in insulating cover 52 and is connected with wire 51. Flip 33 can protect plug base 3 not to receive the jam of dust, and the safe edge can avoid metal contact cover 32 tip to leak outward, causes the electric leakage hidden danger, and metal contact cover 32 and metal contact 53 butt can transmit the electric energy, accomplish and connect.
As shown in fig. 5 and 6, a clamping groove 55 is formed in the metal contact 53, a diameter from the clamping groove 55 of the metal contact 53 to an end close to the end of the metal contact sleeve 32 is smaller than a diameter from the clamping groove 55 to the other end of the metal contact 53, the metal contact sleeve 32 further comprises a spring plate 36, a through hole perpendicular to a central axis of the metal contact 53 is formed in a position of the metal contact sleeve 32 corresponding to the clamping groove 55, holes are respectively formed in two side walls of the metal contact sleeve 32 along a radial direction of the through hole, the spring plates 36 are respectively installed in the holes, and the spring plate 36 is matched with the clamping groove 55. The cooperation of shell fragment 36 and draw-in groove 55 can form certain locking force, avoids hot plug 5 unexpected the droing. The diameter from the clamping groove 55 of the metal contact head 53 to the end close to the metal contact sleeve 32 is smaller than the diameter from the clamping groove 55 to the other end of the metal contact head 53, so that a retraction space can be provided for the elastic sheet 36.
One end of the elastic sheet 36 is cylindrical, the cylindrical end is connected with the hole in an interference fit mode, the other end of the elastic sheet 36 is processed into a flat shape, the flat end of the elastic sheet 36 is wound into a diamond shape, a gap is formed between the tail end of the diamond-shaped elastic sheet 36 and the middle of the elastic sheet 36, and the longer edge of the flat end of the elastic sheet 36 is in the normal direction of the central axis of the metal contact sleeve 32. The elastic sheet 36 can provide locking force and is convenient to install.
The butt joint of insulating bush 52 and insulating casing 31 is processed with the recess that encircles insulating bush 52, and the recess endotheca has the rubber circle, and rubber circle and plug base 3 butt when hot plug 5 inserts plug base 3. The rubber ring can provide sealedly, avoids dust and rainwater to get into, improves the security.
The butt joint box 2 is provided with an indicator light which respectively indicates whether each group of the plugging bases 3 is electrified or not; butt joint case 2 still includes the chamber door, and the chamber door is connected with the box is articulated, and the position fretwork that the chamber door corresponds voltmeter 400 and pilot lamp is inlayed and is had the transparent plate, installs the case lock on the chamber door, and the position processing that the box corresponds the case lock has with case lock cooperation and lockhole. The pilot lamp can instruct electrified condition, improves the security.
The pilot lamp is located near voltmeter 400, the chamber door has mutually independent last chamber door and lower chamber door, it all is connected with the box is articulated to go up the chamber door and lower chamber door, go up the chamber door and cover voltmeter 400 and pilot lamp, lower chamber door covers plug base 3, the position fretwork that goes up the chamber door and correspond voltmeter 400 and pilot lamp is inlayed and is had the transparent plate, go up the chamber door and all install the case lock with lower chamber door, the position processing that the box corresponds the case lock has with case lock cooperation and lockhole. The door is arranged into an upper door and a lower door, so that the safety can be improved.
A method for controlling the low-voltage mobile energy storage system as described above, as shown in fig. 7, includes: A) connecting the plugging base 3 of the energy storage vehicle 4 with the butt joint box 2 through a connecting wire 51; B) setting clocks in the state controller 500 and the PCS controller 602, and setting load peak and load valley time periods; C) when the station is in a load peak time period, the state controller 500 controls the signal relay 300 to be closed, so that the energy storage unit 700 is connected with the low-voltage side of the station transformer 1 through the PCS unit 601, and the PCS controller 602 controls the PCS unit 601 so that the PCS unit 601 outputs alternating current matched with the low-voltage side of the station transformer 1; D) during the load valley period, the state controller 500 controls the signal relay 300 to be closed, and the PCS controller 602 controls the PCS unit 601 to enable the energy storage unit 700 to be in the charging state until the energy storage unit 700 is fully charged or the load underestimation period is over; E) i.e., not in the peak-load period or the underestimation-load period, the state controller 500 controls the signal relay 300 to be turned off.
Example two:
the embodiment provides more improved technical schemes and higher safety on the basis of the first embodiment. As shown in fig. 8, in this embodiment, the metal contact 53 is formed with an electrified locking groove 54, the metal contact sleeve 32 further includes an electrified locking device, a locking hole is formed at a position of the metal contact sleeve 32 corresponding to the electrified locking groove 54, the locking hole penetrates through a wall of one side of the metal contact sleeve 32, the insulating housing 31 is formed with a cavity for accommodating the electrified locking device, the electrified locking device includes a mounting ring 61, a spring 62, a pin 63, a magnetic cap 64, a magnetic ring 65, a resistor R1, a resistor R2, a capacitor C and a diode D1, the mounting ring 61 is concentric with the locking hole and is fixedly mounted on an outer wall of the metal contact sleeve 32 near the locking hole, one end of the pin 63 penetrates through the mounting ring 61 and extends into the locking hole, the other end of the pin 63 is fixedly connected with the magnetic cap 64, a slope is formed on one side of the pin 63 near an open end of the metal contact sleeve 32, the spring 62, two ends of the spring 62 are respectively fixedly connected with the magnetic cap 64 and the mounting ring 61, the spring 62 is in a compressed state, the magnetic ring 65 is sleeved outside the pin 63 and is positioned between the magnetic cap 64 and the mounting ring 61, the magnetic ring 65 is fixedly connected with the insulating shell 31, attractive force is formed between the magnetic ring 65 and the magnetic cap 64, one end of the spring 62 is connected with one end of the resistor R1 through the lead 51, the other end of the resistor R1 is grounded, one end of the resistor R2 is connected with one end of the capacitor C1, the other end of the resistor R2 is grounded, the other end of the capacitor C1 is connected with the other end of the spring 62 and the cathode of the diode D1, and the anode. The rest of the structure is the same as the first embodiment.
The working process of the preferred scheme is as follows: when the metal contact sleeve 32 is electrified, alternating current is generated, the alternating current is rectified by a diode D1, a partial voltage is generated on a resistor R2 through a capacitor C1 and a resistor R2, the partial voltage acts on a spring 62 and a resistor R1, so that current passes through the spring 62 and the resistor R1, the current is alternating current, when the current passes through the spring 62, the spring 62 can be contracted, namely the compressed elastic force of the spring 62 output outwards is weakened, under the action of the attraction force of the magnetic cap 64 and the magnetic ring 65, the magnetic cap 64 is close to the magnetic ring 65 and drives the pin 63 to move downwards, the tail end of the pin 63 is clamped into the electrified locking groove 54, although the alternating current can enable the elastic force of the spring 62 to generate vibration, under the action of the attraction force of the magnetic cap 64 and the magnetic ring 65, the holding position of the pin 63 can be maintained, and the fluctuation of the; when the metal contact sleeve 32 is completely uncharged, the electric energy stored in the capacitor C1 and the spring 62 is completely released, the external output elastic force of the spring 62 is recovered, the elastic force overcomes the attraction force between the magnetic cap 64 and the magnetic ring 65, the pin 63 is driven to move upwards, the pin 63 is separated from the electrified locking groove 54, and the hot plug 5 can be pulled out.
When the hot plug 5 is not inserted into the plug socket, if the plug socket is electrified, the pin 63 moves downwards to be located at the locking position, but a slope is processed on one side of the pin 63 close to the opening end of the metal contact sleeve 32, and the hot plug 5 can be inserted into the plug socket by slight force under the action of the slope, so that hot connection is realized.
To pull out in a charged state, the state controller 500 is required to control the corresponding signal relay 300 to be turned off, and the PCS controller 602 controls the energy storage unit 700 not to output voltage, and the specific control of the state controller 500 and the PCS controller 602 can be realized by communicating with the two and presetting programs. The hot plug is connected and pulled out under the condition that the power of the platform area is not cut off, but is not connected and pulled out under the condition that the hot plug 5 is electrified.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (8)
1. A low-voltage mobile energy storage system is connected with the low-voltage side of a transformer in a transformer area and is characterized in that,
comprises a butt joint box, a connecting wire and an energy storage vehicle,
the butt-joint box comprises a box body, a state controller, a signal relay, a plugging base and a voltmeter, wherein the plugging base and the voltmeter are both arranged on the wall of the box body, the plugging base is connected with the low-voltage side of the transformer area through the signal relay, the signal relay and the voltmeter are both connected with the state controller,
the connecting lead comprises a lead and hot plug plugs connected with the two ends of the lead, the hot plug plugs are matched with the plug base,
the energy storage vehicle comprises a vehicle body, a compartment, a plug-in base, a PCS unit, a PCS controller and an energy storage unit, wherein the compartment is installed on the vehicle body, the energy storage unit is installed in the compartment, the PCS unit is connected with the energy storage unit, the PCS controller is connected with the PCS unit, the plug-in base is connected with the output end of the PCS unit, and the plug-in base is installed on the wall of the compartment;
the plug base comprises a flip cover, a mounting seat, an insulating shell, a metal contact sleeve and a core column, wherein the flip cover is rotatably mounted on the mounting seat, the middle part of the mounting seat is provided with a circular hollow part, one end of the insulating shell is fixedly mounted in the hollow part and is hermetically connected with the hollow part, the metal contact sleeve is in a hollow cylindrical shape with one closed end, the outer edge of the metal contact sleeve is abutted against the inner wall of the insulating shell, the core column is concentric with the metal contact sleeve and is fixedly connected with the closed end of the metal contact sleeve, the open end of the metal contact sleeve is close to the mounting seat, a protective edge extends inwards from the end part of the insulating shell connected with the mounting seat, and the protective edge covers the end part of the open end of,
the hot plug comprises an insulating sleeve and a metal contact head, one end of the metal contact head is matched with the shape of the metal contact sleeve, and the other end of the metal contact head is wrapped in the insulating sleeve and is connected with a wire;
the metal contact is provided with an electrified locking groove,
the metal contact sleeve also comprises an electrified locking device, a locking hole is processed at the corresponding position of the metal contact sleeve and the electrified locking groove, the locking hole penetrates through the wall at one side of the metal contact sleeve, a cavity for accommodating the electrified locking device is processed on the insulating shell,
the electrified locking device comprises a mounting ring, a spring, a pin, a magnetic cap, a magnetic ring, a resistor R1, a resistor R2, a capacitor C and a diode D1, wherein the mounting ring and the locking hole are concentric and fixedly mounted on the outer wall of the metal contact sleeve close to the locking hole, one end of the pin penetrates through the mounting ring and extends into the locking hole, the other end of the pin is fixedly connected with the magnetic cap, one side of the pin close to the opening end of the metal contact sleeve is provided with a slope, the spring is mounted between the magnetic cap and the mounting ring, two ends of the spring are respectively fixedly connected with the magnetic cap and the mounting ring, the spring is in a compression state, the magnetic ring is sleeved outside the pin and is positioned between the magnetic cap and the mounting ring, the magnetic ring is fixedly connected with an insulating shell, attractive force is formed between the magnetic ring and the magnetic cap, one end of the spring is connected with one end of the resistor R1 through a lead, the other end, the other end of the resistor R2 is grounded, the other end of the capacitor C1 is connected with the other end of the spring and the cathode of the diode D1, and the anode of the diode D1 is connected with the metal contact sleeve.
2. The low-voltage mobile energy storage system according to claim 1,
the butt joint box is provided with two groups of plugging bases and two groups of signal relays, each group of plugging bases is respectively connected with the low-voltage side of the transformer area through one group of signal relays, the signal relays are connected with the state controller,
the energy storage car is further provided with an internal combustion generator set, and the energy storage car comprises two groups of plugging bases which are respectively connected with the output end of the PCS unit and the internal combustion generator set connecting piece.
3. The low-voltage mobile energy storage system according to claim 1,
the metal contact is provided with a clamping groove,
the metal contact sleeve further comprises an elastic sheet, the diameter from the clamping groove of the metal contact head to the end part close to the metal contact sleeve is smaller than the diameter from the clamping groove to the other end of the metal contact head, a through hole perpendicular to the central axis of the metal contact head is processed at the position, corresponding to the clamping groove, of the metal contact sleeve, through holes are formed in two side walls of the metal contact sleeve respectively in the radial direction of the through hole, the elastic sheet is installed in the holes, and the elastic sheet is matched with the clamping groove.
4. A low-voltage mobile energy storage system according to claim 3,
the elastic piece is characterized in that one end of the elastic piece is cylindrical, the cylindrical end is connected with the hole in an interference fit mode, the other end of the elastic piece is processed into a flat shape, the flat end of the elastic piece is wound into a diamond shape, a gap is formed between the tail end of the diamond-shaped elastic piece and the middle of the elastic piece, and the longer edge of the flat end of the elastic piece is in the normal direction of the central axis of the metal contact sleeve.
5. The low-voltage mobile energy storage system according to claim 1,
the insulation cover is provided with a groove surrounding the insulation cover at the butt joint with the insulation shell, a rubber ring is sleeved in the groove, and the rubber ring is abutted to the plug base when the hot plug is inserted into the plug base.
6. A low-voltage mobile energy storage system according to claim 1 or 2,
the butt joint box is provided with an indicator light, and the indicator light respectively indicates whether each group of plugging bases is electrified or not;
the butt joint box further comprises a box door, the box door is connected with the box body in a hinged mode, the position of the box door corresponding to the voltmeter and the indicating lamp is hollowed out, a transparent plate is embedded in the position of the box door corresponding to the voltmeter and the indicating lamp, a box door lock is installed on the box door, and the position of the box body corresponding to the box door lock is machined to be matched with the box door lock and a lock hole.
7. The low-voltage mobile energy storage system according to claim 6,
the utility model discloses a portable electronic device, including indicator lamp, chamber door, voltmeter, plug base, box door, position fretwork and inlay the transparent plate, the indicator lamp is located near the voltmeter, the chamber door has mutually independent last chamber door and lower chamber door, it all is connected with the box is articulated to go up chamber door and lower chamber door, it covers to go up the chamber door voltmeter and indicator lamp, lower chamber door covers the plug base, go up the position fretwork that the chamber door corresponds voltmeter and indicator lamp and inlay the transparent plate, go up the chamber door and all install the chamber door lock down, the position processing that the box corresponds the chamber door lock has with chamber door lock.
8. A control method of a low-voltage mobile energy storage system according to any one of claims 1 to 7,
the method comprises the following steps:
A) connecting the energy storage vehicle with the butt joint box through a connecting wire;
B) setting clocks in the state controller and the PCS controller, and setting load peak time and load valley time periods;
C) when the station transformer is in a load peak time period, the state controller controls the signal relay to be closed, so that the energy storage unit is connected with the low-voltage side of the station transformer through the PCS unit, and the PCS controller controls the PCS unit to enable the PCS unit to output alternating current matched with the low-voltage side of the station transformer;
D) when the energy storage unit is in the load valley time period, the state controller controls the signal relay to be closed, and the PCS controller controls the PCS unit to enable the energy storage unit to be in a charging state until the energy storage unit is full or the load valley time period is finished;
E) namely, the state controller controls the signal relay to be disconnected when the load is not in the peak time period or the low time period of the load.
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| CN113949153B (en) * | 2021-11-22 | 2022-09-16 | 贵州电网有限责任公司 | Portable emergency power supply with ice melting function |
| CN116544031B (en) * | 2023-05-31 | 2024-04-19 | 广东电网有限责任公司佛山供电局 | Protective device for protecting wiring terminal of high-voltage capacitor and application method of protective device |
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| CN201466333U (en) * | 2009-08-28 | 2010-05-12 | 安费诺科耐特(西安)科技有限公司 | self-locking connector |
| CN102025182B (en) * | 2010-11-30 | 2012-10-31 | 梁一桥 | Modular charging/discharging system of power battery pack of multifunctional electromobile |
| CN202564785U (en) * | 2012-08-31 | 2012-11-28 | 贵州电网公司电网规划研究中心 | Movable type container power station based on lithium battery energy storage system |
| CN103746410B (en) * | 2013-11-28 | 2016-06-15 | 安徽启光能源科技研究院有限公司 | A kind of mobile energy storage device being applied to power system |
| CN104779480B (en) * | 2014-01-13 | 2017-01-11 | 电连技术股份有限公司 | Side plugged connector |
| CN107732948A (en) * | 2017-10-17 | 2018-02-23 | 北京华泰美景科技发展有限公司 | A kind of Mobile energy storage electric power station system |
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