CN113067354B - Multi-stage response energy storage system of power distribution network - Google Patents
Multi-stage response energy storage system of power distribution network Download PDFInfo
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- CN113067354B CN113067354B CN202110234945.XA CN202110234945A CN113067354B CN 113067354 B CN113067354 B CN 113067354B CN 202110234945 A CN202110234945 A CN 202110234945A CN 113067354 B CN113067354 B CN 113067354B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 88
- 230000004044 response Effects 0.000 title claims abstract description 21
- 238000004891 communication Methods 0.000 claims description 30
- 239000012188 paraffin wax Substances 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000005057 refrigeration Methods 0.000 claims description 9
- 239000004065 semiconductor Substances 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 11
- 238000012806 monitoring device Methods 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 244000062793 Sorghum vulgare Species 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 235000019713 millet Nutrition 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
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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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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/08—Control of fire-fighting equipment comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
- A62C37/10—Releasing means, e.g. electrically released
- A62C37/11—Releasing means, e.g. electrically released heat-sensitive
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the technical field of peak clipping and valley filling of a power distribution network, in particular to a multi-level response energy storage system of the power distribution network, which comprises a plurality of user side energy storage devices, a distribution network energy storage box, a distribution network monitoring device and a control center, wherein the user side energy storage devices are arranged at user entrance lines, the user side energy storage devices are connected with the entrance lines, the distribution network energy storage box is arranged near a transformer, the distribution network energy storage box is connected with an outgoing line of the transformer, the distribution network monitoring device is connected with a distribution bus in the distribution network, the voltage and the frequency of the distribution bus are monitored, and the user side energy storage devices, the distribution network energy storage box and the distribution network monitoring device are all connected with the control center. The substantial effects of the invention are as follows: the user side energy storage equipment provides quick response load adjustment, the load adjustment for single-user users is very convenient and effective, the power consumption capacity of the power distribution network energy storage box can be provided for several hours, the load adjustment effect of a larger range can be provided, peak clipping and valley filling are realized, and the operation of the power distribution network is more stable.
Description
Technical Field
The invention relates to the technical field of peak clipping and valley filling of a power distribution network, in particular to a multi-stage response energy storage system of the power distribution network.
Background
Energy supply, consumption, technology and system in the current power grid are deeply changed, various factors are mutually overlapped, and the new problem of the power distribution network appears under a complex background. At present, the power distribution network still belongs to a semi-rigid power grid with a source driven by load. More redundancies are reserved in the power distribution network, and excessive power resources are occupied. The limitation margin of the power grid equipment cannot be released, so that the limitation efficiency is improved; the equipment operation standard lacks effective evaluation under the changing environment, and the improvement of redundancy security to the reduction of redundancy security is urgently needed. With the development of new energy, fossil energy with regulation capacity under the condition of energy double control is limited in development, the occupation ratio is reduced, and the autonomous regulation capacity is rapidly occupied. In a traditional mode, the safety and the efficiency have natural contradictions, the efficiency optimization is accompanied with the reduction of the safety margin, and the safety stability level is increased to reduce the operation efficiency. The power grid operation is squeezed by the source, the grid, the load and the storage, the space for the power grid to move and adjust is sharply reduced, the power grid development mode needs to be changed urgently, a small amount of centralized adjustment is changed into massive dispersed response, adjustable flexible resources are greatly adjusted, an elastic power grid is constructed, and safety and efficiency are improved. And various energy storage devices deployed in the power distribution network can effectively improve the interaction level of the power source network charge storage, ensure the safe operation of the power distribution network and improve the operation efficiency of the power distribution network.
Chinese patent CN111193281A, open 22 days in 5 months of 2020, a user side distributed energy storage system, including the switch board, the switch board includes the cabinet body, and the terminal surface articulates before the cabinet body has the cabinet door, and open cabinet body one side has the radiating groove, and the inboard installation filter screen of radiating groove, open cabinet body one side upper end has commercial power input, and control module is installed to cabinet body inner chamber bottom, and cabinet body inner chamber is from last down installing polylith electric board of placing, and isolation transformer, PCS inverter, contact relay, group battery have been placed on the electric board of placing. Although the technical scheme can select charging and discharging in different time periods, the power load in the peak period is effectively relieved, unified scheduling in a power distribution network is lacked, and the adjusting function of the energy storage device cannot be effectively exerted.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the technical problem of user side interactive scheduling is lacked at present. A multi-stage response energy storage system of a power distribution network is provided. The system has multiple energy storage devices, providing load regulation at different response speeds.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a distribution network multistage response energy storage system, includes a plurality of user side energy storage equipment, distribution network energy storage box, distribution network monitoring facilities and control center, a plurality of user side energy storage equipment deploys in user's entrance line department, user side energy storage equipment is connected with the entrance line, and distribution network energy storage box installs near the transformer, distribution network energy storage box and transformer are qualified for the next round of competitions and are connected, distribution network monitoring facilities is connected with the distribution bus in the distribution network, monitors distribution bus's voltage and frequency, a plurality of user side energy storage equipment, distribution network energy storage box and distribution network monitoring facilities all are connected with control center. User side energy storage equipment provides quick response's load and adjusts, and is nearest apart from the user, and it is very convenient effective to provide load for single family user and adjusts, but the capacity that user side energy storage equipment can provide is limited, and the power consumption capacity of several hours can be provided to the distribution network energy storage box, though response speed is not as much as user side energy storage equipment, but can provide load regulation effect by a relatively large margin, realizes the load of load shifting that the peak clipping filled the millet, makes the operation of distribution network more steady.
Preferably, the energy storage box of the power distribution network comprises a box body, a junction box, an inverter, a charger, a communication module, a controller, a voltmeter, a plurality of controllable switches and a plurality of battery packs, the junction box is installed on the box body, the inverter, the charger, the communication module and the controller are all installed in the box body, the inverter and the charger are connected with a transformer through the junction box in an outgoing line mode, the output ends of the inverter and the charger are connected with the battery packs, the inverter, the charger and the battery packs are connected with the controllable switches in series, the voltmeter detects the voltage of the battery packs, the controllable switches, the communication module and the voltmeter are connected with the controller, and the communication module is in communication connection with a control center. The inverter can be with the electric energy conversion in the group battery for the alternating current for the distribution network power supply, and the charger can use the electric energy on the distribution network bus to charge for the battery, can monitor the residual capacity state of battery through the voltmeter, realizes charging and discharge's control through controller and control center, implements the peak clipping and fills in the millet task, brings the benefit for electric wire netting even running.
Preferably, the power distribution network energy storage box further comprises a temperature regulation and control device, the temperature regulation and control device comprises a temperature sensor, a heating module, a semiconductor refrigeration module and a fan, a ventilation opening is formed in the box body, the fan is installed at the ventilation opening, the temperature sensor, the heating module and the semiconductor refrigeration module are all installed in the box body, the temperature sensor detects the air temperature in the box body, and the temperature sensor, the heating module and the semiconductor refrigeration module are all connected with the controller. The temperature regulation and control device can regulate and control the temperature in the box body, and the normal work of the battery pack is ensured.
Preferably, the battery packs are provided with three groups, the inverter comprises three inversion modules, the charger comprises three charging modules, the inversion modules and the charging modules are connected with the controller, each group of battery packs is respectively connected with one inversion module and one charging module, and the three inversion modules and the charging modules are respectively connected with three phase lines of the transformer. Each group corresponds to a phase line, different phase lines can be charged or discharged by adopting different powers, and the phase-to-phase balance effect can be achieved.
Preferably, the user side energy storage device comprises a shell, a control unit, a charging unit, an inversion unit, a communication unit, a voltage detection unit, two electronic switches and a battery, wherein the control unit, the charging unit, the inversion unit, the communication unit and the battery are all installed in the shell, the charging unit and the inversion unit are respectively connected with a live wire of a house through the electronic switches, the charging unit and the inversion unit are respectively connected with a positive electrode of the battery, a negative electrode of the battery is connected with a zero line of the house, the voltage detection unit detects voltages at two ends of the battery, the charging unit, the inversion unit, the communication unit, the voltage detection unit and the electronic switches are all connected with the control unit, and the communication unit is in communication connection with a control center. The contravariant unit can be with the electric energy conversion in the battery for the alternating current for the user power supply, and the charging unit can charge for the battery, realizes carrying out the effect of finely tuning fast to user's load, and although every user side energy storage equipment's capacity is limited, all user side energy storage equipment can provide considerable regulation capacity in the distribution network, help the steady operation of distribution network.
Preferably, the user side energy storage equipment further comprises a passive fire extinguisher, the passive fire extinguisher is installed in the shell and comprises a high-pressure gas tank and a trigger plug, high-pressure fire extinguishing gas is filled in the high-pressure gas tank, and the trigger plug is installed at an outlet of the high-pressure gas tank. When the temperature is higher, the trigger plug is opened, high-pressure fire extinguishing gas is released, the temperature in the energy storage equipment at the user side is reduced or the fire in the energy storage equipment at the user side is extinguished, and after the trigger plug is opened, a user needs to replace a passive fire extinguisher or replace the whole energy storage equipment at the user side.
As preferred, the trigger stopper includes tongue, two contact heads and paraffin, the jar mouth of high pressure gas pitcher is sealed, and the jar mouth blind end is opened there are a plurality of aperture, the jar mouth side is opened there is the air jet, the tongue is placed in the jar mouth, jar mouth inner wall covers there is the insulating layer, tongue and jar mouth sliding connection, paraffin is placed between tongue and jar mouth blind end, two the contact head is inlayed on the jar mouth, contact head and tongue butt, the tongue is the conductor of electricity, two the contact head is established ties and is inserted between battery and the charging unit. When the temperature rises, the paraffin softens, and the gaseous pushing sliding tongue of putting out a fire of high pressure extrudes paraffin from the aperture in the pinhole, then spills the air jet and makes contact head and sliding tongue break away from the contact simultaneously, not only can release high pressure fire extinguishing gas, has cut off battery and external connection simultaneously, ensures user side energy storage equipment's safety.
The substantial effects of the invention are as follows: the user side energy storage equipment provides quick response load adjustment, the load adjustment for single-user users is very convenient and effective, the power consumption capacity of the power distribution network energy storage box can be provided for several hours, the load adjustment effect of a larger range can be provided, peak clipping and valley filling are realized, and the operation of the power distribution network is more stable.
Drawings
Fig. 1 is a schematic diagram of a connection of a multi-stage response energy storage system of a power distribution network according to an embodiment.
Fig. 2 is a schematic structural diagram of a multi-stage response energy storage system of a power distribution network according to an embodiment.
Fig. 3 is a schematic structural diagram of a distribution network energy storage box according to an embodiment.
Fig. 4 is a schematic structural diagram of a user-side energy storage device according to an embodiment.
FIG. 5 is a schematic view of a passive fire extinguisher according to an embodiment.
Wherein: 100. the system comprises a transformer, 200, a user side energy storage device, 201, a control unit, 202, a charging unit, 203, a battery, 204, a shell, 205, an inversion unit, 206, a passive fire extinguisher, 2061, high-pressure fire extinguishing gas, 2062, a sliding tongue, 2063, an air jet, 2064, a cover net, 2065, a tank nozzle, 2066, a small hole, 2067, a contact head, 300, a distribution network energy storage box, 301, a box body, 302, a junction box, 303, an inverter, 304, a charger, 305, a controller, 306, a battery pack, 307 and a temperature regulation device.
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:
the utility model provides a distribution network multistage response energy storage system, as shown in figure 1, including a plurality of user side energy storage equipment 200, distribution network energy storage box 300, distribution network monitoring facilities and control center, a plurality of user side energy storage equipment 200 deploys in user's house lead department, user side energy storage equipment 200 is connected with house lead, as shown in figure 2, distribution network energy storage box 300 installs near transformer 100, distribution network energy storage box 300 is connected with transformer 100 outgoing line, distribution network monitoring facilities is connected with the distribution bus in the distribution network, the voltage and the frequency of monitoring distribution bus, a plurality of user side energy storage equipment 200, distribution network energy storage box 300 and distribution network monitoring facilities all are connected with control center.
As shown in fig. 3, the power distribution network energy storage box 300 includes a box 301, a junction box 302, an inverter 303, a charger 304, a communication module, a controller 305, a voltmeter, a plurality of controllable switches and a plurality of battery packs 306, the junction box 302 is installed on the box 301, the inverter 303, the charger 304, the communication module and the controller 305 are all installed in the box 301, the inverter 303 and the charger 304 are both connected with the transformer 100 through the junction box 302, output ends of the inverter 303 and the charger 304 are both connected with the battery packs 306, the inverter 303 and the charger 304 are connected with the battery packs 306 through the controllable switches in series, the voltmeter detects the voltage of the battery packs 306, the controllable switches, the communication module and the voltmeter are all connected with the controller 305, and the communication module is connected with the control center in a communication manner. The inverter 303 can convert the electric energy in the battery pack 306 into alternating current to supply power to the power distribution network, the charger 304 can charge the battery 203 by using the electric energy on a bus of the power distribution network, the state of the residual electric quantity of the battery 203 can be monitored by the voltmeter, the control of charging and discharging is realized by the controller 305 and the control center, a peak clipping and valley filling task is implemented, and the benefit is brought to the smooth operation of the power distribution network.
Distribution network energy storage box 300 still includes temperature regulation and control device 307, and temperature regulation and control device 307 includes temperature sensor, heating module, semiconductor refrigeration module and fan, has seted up the vent on the box 301, and the fan is installed in vent department, and temperature sensor, heating module and semiconductor refrigeration module are all installed in box 301, and temperature sensor detects the interior air temperature of box 301, and temperature sensor, heating module and semiconductor refrigeration module all are connected with controller 305. The temperature control device 307 can control the temperature in the box 301 to ensure the normal operation of the battery pack 306.
The battery packs 306 are three groups, the inverter 303 includes three inverter modules, the charger 304 includes three charging modules, the inverter modules and the charging modules are connected to the controller 305, each group of battery packs 306 is connected to one inverter module and one charging module, and the three inverter modules and the charging modules are connected to three phase lines of the transformer 100. Each group corresponds to a phase line, different phase lines can be charged or discharged by adopting different powers, and the phase-to-phase balance effect can be achieved.
As shown in fig. 4, the user-side energy storage device 200 includes a housing 204, a control unit 201, a charging unit 202, an inverting unit 205, a communication unit, a voltage detection unit, two electronic switches, and a battery 203, where the control unit 201, the charging unit 202, the inverting unit 205, the communication unit, and the battery 203 are all installed in the housing 204, the charging unit 202 and the inverting unit 205 are respectively connected to a live line through an electronic switch, the charging unit 202 and the inverting unit 205 are both connected to a positive electrode of the battery 203, a negative electrode of the battery 203 is connected to a zero line of a house, the voltage detection unit detects voltages at two ends of the battery 203, the charging unit 202, the inverting unit 205, the communication unit, the voltage detection unit, and the electronic switches are all connected to the control unit 201, and the communication unit is in communication connection with a control center. The inversion unit 205 can convert the electric energy in the battery 203 into alternating current to supply power to the user, the charging unit 202 can charge the battery 203, the effect of quickly fine-tuning the load of the user is achieved, and although the capacity of each user-side energy storage device 200 is limited, all user-side energy storage devices 200 in the power distribution network can provide considerable adjusting capacity, and stable operation of the power distribution network is facilitated.
The user-side energy storage device 200 further comprises a passive fire extinguisher 206, as shown in fig. 5, the passive fire extinguisher 206 is installed in the housing 204, the passive fire extinguisher 206 comprises a high pressure gas tank filled with high pressure fire extinguishing gas 2061 and a trigger plug installed at an outlet of the high pressure gas tank. A cover net 2064 is installed at a tank mouth 2065 of the high-pressure gas tank. When the temperature is high, the trigger plug is opened to release the high-pressure fire extinguishing gas 2061, thereby lowering the temperature in the energy storage device 200 on the user side or extinguishing the fire in the energy storage device 200 on the user side, and when the trigger plug is opened, the user should replace the passive fire extinguisher 206 or the entire energy storage device 200 on the user side.
The trigger plug comprises a sliding tongue 2062, two contact heads 2067 and paraffin, a tank mouth 2065 of the high-pressure gas tank is closed, a plurality of small holes 2066 are formed in the closed end of the tank mouth 2065, a gas injection port 2063 is formed in the side face of the tank mouth 2065, the sliding tongue 2062 is placed in the tank mouth 2065, the inner wall of the tank mouth 2065 is coated with an insulating layer, the sliding tongue 2062 is connected with the tank mouth 2065 in a sliding mode, the paraffin is placed between the sliding tongue 2062 and the closed end of the tank mouth 2065, the two contact heads 2067 are embedded in the tank mouth 2065, the contact heads 2067 are abutted to the sliding tongue 2062, the sliding tongue 2062 is an electric conductor, and the two contact heads 2067 are connected between the battery 203 and the charging unit 202 in series. When the temperature rises, the paraffin softens, the high-pressure fire extinguishing gas 2061 pushes the sliding tongue 2062 to extrude the paraffin out of the small hole 2066, then the paraffin leaks out of the air vent 2063, and the contact head 2067 and the sliding tongue 2062 are separated from contact, so that the high-pressure fire extinguishing gas 2061 can be released, the connection between the battery 203 and the external connection is cut off, and the safety of the energy storage equipment 200 on the user side is ensured.
The beneficial technical effects of this embodiment are: user side energy storage device 200 provides quick response's load and adjusts, and it is very convenient effective to provide load for single household user and adjust, and distribution network energy storage box 300 can provide the power consumption capacity of several hours, can provide load regulation effect by a relatively large margin, realizes the load of shifting peak and filling a valley, makes the operation of distribution network more steady.
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 (5)
1. A multi-stage response energy storage system of a power distribution network is characterized in that,
including a plurality of user side energy storage equipment, join in marriage net energy storage box, join in marriage net monitoring facilities and control center, a plurality of user side energy storage equipment deploys in user's house lead department, user side energy storage equipment is connected with the house lead, joins in marriage net energy storage box and installs near the transformer, join in marriage net energy storage box and transformer and be qualified for the next round of competitions and be connected, join in marriage the distribution bus connection of net monitoring facilities and join in marriage the distribution bus-bar in the net, monitor distribution bus's voltage and frequency, a plurality of user side energy storage equipment, join in marriage net energy storage box and join in marriage net monitoring facilities and all are connected with control center, user side energy storage equipment includes passive fire extinguisher, passive fire extinguisher is installed in the casing, passive fire extinguisher includes high-pressure gas jar and trigger plug, the high-pressure gas jar is filled with high-pressure fire extinguishing gas, trigger plug installs the exit at high-pressure gas jar, trigger plug includes tongue, Two contact heads and paraffin, the jar mouth of high pressure gas pitcher is sealed, and the jar mouth blind end is opened there are a plurality of aperture, open jar mouth side has the air jet, the tongue is placed in the jar mouth, the jar mouth inner wall covers there is the insulating layer, tongue and jar mouth sliding connection, paraffin is placed between tongue and jar mouth blind end, two the contact head is inlayed on the jar mouth, contact head and tongue butt, the tongue is the conductor of electricity, two the contact head is established ties and is inserted between battery and the charging unit.
2. The multi-stage response energy storage system of the power distribution network of claim 1,
the distribution network energy storage box comprises a box body, a junction box, an inverter, a charger, a communication module, a controller, a voltmeter, a plurality of controllable switches and a plurality of battery packs, the junction box is installed on the box body, the inverter, the charger, the communication module and the controller are all installed in the box body, the inverter and the charger are connected with a transformer through the junction box in an outgoing line mode, the output ends of the inverter and the charger are connected with the battery packs, the inverter, the charger and the battery packs are connected with the controllable switches in a series mode, the voltmeter detects the voltage of the battery packs, the controllable switches, the communication module and the voltmeter are all connected with the controller, and the communication module is in communication connection with a control center.
3. The multi-stage response energy storage system of the power distribution network of claim 2,
join in marriage net energy storage box and still include temperature regulation and control device, temperature regulation and control device includes temperature sensor, heating module, semiconductor refrigeration module and fan, the vent has been seted up on the box, the fan is installed vent department, temperature sensor, heating module and semiconductor refrigeration module are all installed in the box, the internal air temperature of temperature sensor detection box, temperature sensor, heating module and semiconductor refrigeration module all are connected with the controller.
4. The multi-stage response energy storage system of the power distribution network according to claim 2 or 3,
the battery pack is provided with three groups, the inverter comprises three inversion modules, the charger comprises three charging modules, the inversion modules and the charging modules are connected with the controller, each group of battery pack is connected with one inversion module and one charging module respectively, and the three inversion modules and the charging modules are connected with three phase lines of the transformer respectively.
5. The multi-stage response energy storage system of the power distribution network according to claim 1, 2 or 3,
user side energy storage equipment includes casing, control unit, the unit of charging, contravariant unit, communication unit, voltage detection unit, two electronic switch and battery, control unit, the unit of charging, contravariant unit, communication unit and battery are all installed in the casing, the unit of charging and contravariant unit are connected with the live wire of registering one's residence through electronic switch respectively, the unit of charging and contravariant unit all with battery anodal be connected, the battery negative pole is connected with the zero line of registering one's residence, voltage detection unit detects battery both ends voltage, the unit of charging, contravariant unit, communication unit, voltage detection unit and electronic switch all are connected with control unit, communication unit and control center communication connection.
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