CN113949151A - Black-start power supply circuit of energy storage converter - Google Patents
Black-start power supply circuit of energy storage converter Download PDFInfo
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- CN113949151A CN113949151A CN202111214776.XA CN202111214776A CN113949151A CN 113949151 A CN113949151 A CN 113949151A CN 202111214776 A CN202111214776 A CN 202111214776A CN 113949151 A CN113949151 A CN 113949151A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 23
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- 238000012986 modification Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 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
- 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
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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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
- H02J9/062—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 for AC powered loads
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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
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/40—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries adapted for charging from various sources, e.g. AC, DC or multivoltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Rectifiers (AREA)
Abstract
A black start power supply circuit of an energy storage converter belongs to the technical field of black start of energy storage converters. The intelligent power supply comprises a three-phase rectification module, an alternating current side current limiting module, a direct current side current limiting module, a bus pre-charging control module and a black start power supply, wherein the input end of the three-phase rectification module is connected with a power grid, the output end of the three-phase rectification module is respectively connected with the bus pre-charging control module and the black start power supply through the alternating current side current limiting module, the input end of the direct current side current limiting module is connected with the direct current power supply, and the output end of the direct current side current limiting module is respectively connected with the bus pre-charging control module and the black start power supply. The invention integrates the DC pre-charging function, the AC pre-charging function and the function of supplying power to the black start power supply into a whole so as to ensure that the control system effectively supplies power in real time, and has less used devices and low power consumption. The zero-loss power supply black-start power supply can be realized by arranging the direct-current side switching module.
Description
Technical Field
The invention belongs to the technical field of black start of energy storage converters, and particularly relates to a black start power supply circuit of an energy storage converter.
Background
The PCS (energy storage converter) is used as an energy bidirectional interactive inverter product and is mainly applied to the scenes of peak regulation and frequency modulation of a power grid, a standby power supply, power smoothing of a power generation side, peak clipping and valley filling of a user side and the like. Since the PCS is in the core position of energy interaction, the black start function also becomes a mandatory requirement function for owners besides meeting the national specified standard, and a reliable and real-time power supply system is a precondition for ensuring the realization of the function.
The black start function is: at the moment of power failure of a power grid, the PCS can be converted into a power supply with independent waveform output from a simple capacity conversion device, and a micro-grid system with a battery and the PCS as power generation equipment is established, so that power supply for external emergency design and important equipment can be completed.
In the conventional power supply design, the PCS only has direct current pre-charging or only has alternating current pre-charging or the black start power supply supplies power independently, the function is single, secondary circuits in the PCS are too many, the power supply is not reliable, and the like.
Therefore, a new solution is needed to solve this problem.
Disclosure of Invention
The invention mainly solves the technical problems in the prior art and provides a black-start power supply circuit of an energy storage converter.
The technical problem of the invention is mainly solved by the following technical scheme: the utility model provides an energy storage converter black start supply circuit, includes three-phase rectifier module, exchanges side current limiting module, direct current side current limiting module, generating line pre-charge control module and black start power, three-phase rectifier module's input connects the electric wire netting, three-phase rectifier module's output links to each other with generating line pre-charge control module and black start power respectively through exchanging side current limiting module, direct current side current limiting module's input connects direct current power, direct current side current limiting module's output links to each other with generating line pre-charge control module and black start power respectively.
Preferably, the input end of the three-phase rectification module is connected with a power grid through a circuit breaker and a fuse.
Preferably, the three-phase rectifier module is a three-phase rectifier bridge with a reverse withstand voltage of 1800V.
Preferably, the input end of the direct current side current limiting module is connected with a direct current power supply through a fuse.
Preferably, the alternating current side current limiting module comprises a resistor R3 and a resistor R4, one output end of the three-phase rectifying module is connected with one input end of the bus pre-charging control module and one input end of the black start power supply through a resistor R3, and the other output end of the three-phase rectifying module is connected with the other input end of the bus pre-charging control module and the other input end of the black start power supply through a resistor R4.
Preferably, the current-limiting module on the dc side includes a diode D1, a diode D2, a resistor R1 and a resistor R2, the positive pole of the diode D1 is connected to the positive pole of the dc power supply, the negative pole of the diode D1 is connected to one end of a resistor R1, the other end of the resistor R1 is connected to one input end of the bus pre-charging control module and the black start power supply, the negative pole of the diode D2 is connected to the negative pole of the dc power supply, the positive pole of the diode D2 is connected to one end of the resistor R2, and the other end of the resistor R2 is connected to the other input end of the bus pre-charging control module and the black start power supply.
Preferably, the bus pre-charging control module comprises a switch KM2 and a switch KM3, one end of the switch KM2 is respectively connected with one output end of the dc side current limiting module, one output end of the ac side current limiting module, and one input end of the black start power supply, one end of the switch KM3 is respectively connected with the other output end of the dc side current limiting module, the other output end of the ac side current limiting module, and the other input end of the black start power supply, and the other end of the switch KM2 and the other end of the switch KM3 are both connected with a bus of the energy storage converter.
Preferably, the black start circuit further comprises a direct current side switching module, an input end of the direct current side switching module is connected with a direct current power supply, and an output end of the direct current side switching module is connected with the black start power supply through a bus pre-charging control module.
Preferably, the output end of the direct current side switching module is connected with the bus pre-charging control module through a fuse.
Preferably, the dc-side switching module includes a circuit breaker Q2, one input end of the circuit breaker Q2 is connected to the positive electrode of the dc power supply, the other input end of the circuit breaker Q2 is connected to the negative electrode of the dc power supply, one output end of the circuit breaker Q2 is connected to one input end of the black start power supply through a bus pre-charge control module, and the other output end of the circuit breaker Q2 is connected to the other input end of the black start power supply through a bus pre-charge control module.
The invention has the following beneficial effects: the invention integrates the DC pre-charging function, the AC pre-charging function and the function of supplying power to the black start power supply into a whole so as to ensure that the control system effectively supplies power in real time, and has less used devices and low power consumption. The zero-loss power supply black-start power supply can be realized by arranging the direct-current side switching module.
Drawings
FIG. 1 is a block diagram of an architecture of the present invention;
FIG. 2 is a schematic diagram of a connection circuit of fuse FU3, fuse FU4, fuse FU5 and the grid in accordance with the present invention;
FIG. 3 is a schematic diagram of a connection circuit of the three-phase rectification module, the AC side current limiting module, the DC side current limiting module and the bus pre-charge control module according to the present invention;
FIG. 4 is a schematic diagram of a connection circuit between the DC-side switching module and the DC power supply according to the present invention;
fig. 5 is a circuit diagram of the black start power supply of the present invention.
In the figure: 1. a three-phase rectification module; 2. an alternating current side current limiting module; 3. a direct current side current limiting module; 4. a bus pre-charging control module; 5. a black start power supply; 6. a power grid; 7. a direct current power supply; 8. and a direct current side switching module.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b): the energy storage converter black start power supply circuit comprises a three-phase rectification module 1, an alternating current side current limiting module 2, a direct current side current limiting module 3, a bus pre-charging control module 4 and a black start power supply 5, wherein the input end of the three-phase rectification module 1 is connected with a power grid 6, the output end of the three-phase rectification module 1 is respectively connected with the bus pre-charging control module 4 and the black start power supply 5 through the alternating current side current limiting module 2, the input end of the direct current side current limiting module 3 is connected with a direct current power supply 7, and the output end of the direct current side current limiting module 3 is respectively connected with the bus pre-charging control module 4 and the black start power supply 5.
The power grid 6 is three-phase alternating current, the direct current power supply 7 is a storage battery, and the input end of the three-phase rectification module 1 is connected with the power grid 6 through a circuit breaker and a fuse.
The alternating current side current limiting module 2 comprises a resistor R3 and a resistor R4, one path of output end of the three-phase rectification module 1 is respectively connected with one path of input end of the bus pre-charging control module 4 and the black starting power supply 5 through a resistor R3, and the other path of output end of the three-phase rectification module 1 is respectively connected with the other path of input end of the bus pre-charging control and the black starting power supply 5 through a resistor R4.
The input end of the direct current side current limiting module 3 is connected with a direct current power supply 7 through a fuse. Direct current side current-limiting module 3 includes diode D1, diode D2, resistance R1 and resistance R2, diode D1's positive pole connects DC power supply 7's positive pole, diode D1's negative pole connects resistance R1's one end, resistance R1's the other end connects busbar pre-charge control module 4 and black start power supply 5's input end all the way respectively, diode D2's negative pole connects DC power supply 7's negative pole, diode D2's positive pole connects resistance R2's one end, resistance R2's the other end connects busbar pre-charge control module 4 and black start power supply 5's another way input end respectively.
The bus pre-charging control module 4 comprises a switch KM2 and a switch KM3, one end of the switch KM2 is respectively connected with one output end of the direct-current side current limiting module 3, one output end of the alternating-current side current limiting module 2 and one input end of the black start power supply 5, one end of the switch KM3 is respectively connected with the other output end of the direct-current side current limiting module 3, the other output end of the alternating-current side current limiting module 2 and the other input end of the black start power supply 5, and the other end of the switch KM2 and the other end of the switch KM3 are both connected with a bus of the energy storage converter.
The power supply circuit further comprises a direct current side switching module 8, the input end of the direct current side switching module 8 is connected with a direct current power supply 7, and the output end of the direct current side switching module 8 is connected with the black start power supply 5 through a bus pre-charging control module 4.
And the output end of the direct current side switching module 8 is connected with the bus pre-charging control module 4 through a fuse. Direct current side switches module 8 and includes circuit breaker Q2, circuit breaker Q2's the positive pole of input termination DC power supply 7 of the same kind, circuit breaker Q2's another way input termination DC power supply 7's negative pole, circuit breaker Q2's the output of the same kind links to each other with black start power supply 5's the input of the same kind through generating line precharge control module 4, circuit breaker Q2's another way output links to each other with black start power supply 5's another way input through generating line precharge control module 4.
In this embodiment, as shown in fig. 2 to 5, the three-phase rectifier module 1 is a reverse 1800V-withstand voltage three-phase rectifier bridge, a first input terminal of the three-phase rectifier bridge VD4 is connected to one end of a first connector of a breaker QF5, the other end of the first connector of the breaker QF5 is connected to a U-phase of the power grid 6 through a fuse FU3, a second input terminal of the three-phase rectifier bridge VD4 is connected to one end of a second connector of a breaker QF5, the other end of the second connector of the breaker QF5 is connected to a V-phase of the power grid 6 through the fuse FU4, a third input terminal of the three-phase rectifier bridge VD4 is connected to one end of a third connector of the breaker QF5, and the other end of the third connector of the breaker QF5 is connected to a W-phase of the power grid 6 through a fuse FU 5.
One output end of the three-phase rectifier bridge VD4 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with one end of a switch KM2 and one input end of a black start power supply P1 respectively, the other output end of the three-phase rectifier bridge VD4 is connected with one end of a resistor R4, the other end of the resistor R4 is connected with one end of the switch KM3 and the other input end of the black start power supply P1 respectively, and the other end of the switch KM2 and the other end of the switch KM3 are connected with a bus of the energy storage converter.
The anode of the diode D1 is connected with the anode of the direct current power supply 7 through the fuse FU9, the cathode of the diode D1 is connected with one end of the resistor R1, the other end of the resistor R1 is respectively connected with one end of the switch KM2 and one input end of the black start power supply P1, the cathode of the diode D2 is connected with the cathode of the direct current power supply 7 through the fuse FU10, the anode of the diode D2 is connected with one end of the resistor R2, and the other end of the resistor R2 is respectively connected with one end of the switch KM3 and the other input end of the black start power supply P1.
One path of input end of the breaker Q2 is connected with the anode of the direct current power supply 7, the other path of input end of the breaker Q2 is connected with the cathode of the direct current power supply 7, one path of output end of the breaker Q2 is connected with the switch KM2 through the fuse FU6 and is connected with one path of input end of the black start power supply P1 through the switch KM2, the other path of output end of the breaker Q2 is connected with the switch KM3 through the fuse FU8 and is connected with the other path of input end of the black start power supply P1 through the switch KM 3.
In normal use: (1) the fuse FU3, the fuse FU4 and the fuse FU5 are connected to a power grid 6 through a breaker Q1, the voltage of the power grid 6 is 400V, the power grid 6 transmits 400V alternating current to a three-phase rectifier bridge VD4, the reverse withstand voltage of the three-phase rectifier bridge VD4 is 1800V, so that no backflow of bus voltage to an alternating current side is ensured, and the 400V uncontrolled rectifier voltage is about 400 × 1.414 to 565.5V through calculation; the output end of the three-phase rectifier bridge VD4 realizes AC pre-charging on the bus through the resistor R3, the resistor R4, the switch KM2 and the switch KM3, and supplies power to the black start power supply 5. And the PCS black start and control system can normally supply power under the condition of only alternating voltage, and the bus pre-charging function is completed.
(2) The output end of the direct current power supply 7 realizes direct current pre-charging on the bus through the fuse FU9, the fuse FU10, the diode D1, the diode D2, the resistor R1, the resistor R2, the switch KM2 and the switch KM3, and supplies power to the black start power supply 5. Under the condition that the protection only has direct-current voltage, the PCS black start and control system can normally supply power and complete the bus pre-charging function.
(3) When the circuit breaker Q2 is closed, the output end of the dc power supply 7 continuously supplies power to the black start power supply 5 through the switch KM2 and the switch KM3, thereby ensuring the operation of the control system. Because the impedance of the circuit breaker Q2 is almost zero, the current no longer passes through heating devices such as a resistor, a diode and the like, and zero-loss power supply is realized.
When an abnormal condition occurs: (1) in the event of a power failure of the grid 6: the PCS does not have alternating voltage at the moment, but has direct voltage, the direct current power supply 7 supplies power to the black start power supply 5, the black start power supply 5 outputs direct current to the control system, the control system is enabled to normally supply power to operate, the control system switches the PCS operation mode to VF and autonomously outputs three-phase 400V alternating voltage, and therefore a micro-grid 6 power supply is built to supply power to emergency equipment and important equipment.
(2) In the absence of a dc voltage: during debugging, a plurality of environments which cannot meet the voltage of a field battery exist, common alternating current is available everywhere, and the alternating current can be used for testing the PCS rectifying function and the logic performance; by adopting the mode, normal power supply of the black-start power supply 5 is ensured, and the bus pre-charging function can be realized.
In summary, the present invention integrates the dc pre-charge function, the ac pre-charge function, and the power supply to the black start power supply, so as to ensure real-time and effective power supply of the control system, and has few devices and low power consumption. The zero-loss power supply black-start power supply can be realized by arranging the direct-current side switching module.
Finally, it should be noted that the above embodiments are merely representative examples of the present invention. It is obvious that the invention is not limited to the embodiments described above, but that many variations are possible. Any simple modification, equivalent change and modification made to the above embodiments in accordance with the technical spirit of the present invention should be considered to be within the scope of the present invention.
Claims (10)
1. The black-start power supply circuit of the energy storage converter comprises a three-phase rectification module, an alternating current side current limiting module, a direct current side current limiting module, a bus pre-charging control module and a black-start power supply, and is characterized in that the input end of the three-phase rectification module is connected with a power grid, the output end of the three-phase rectification module is respectively connected with the bus pre-charging control module and the black-start power supply through the alternating current side current limiting module, the input end of the direct current side current limiting module is connected with the direct current power supply, and the output end of the direct current side current limiting module is respectively connected with the bus pre-charging control module and the black-start power supply.
2. The black-start power supply circuit of an energy storage converter as claimed in claim 1, wherein the input end of the three-phase rectification module is connected to the power grid through a breaker and a fuse.
3. The black-start power supply circuit of the energy storage converter as claimed in claim 1, wherein the three-phase rectification module is a three-phase rectification bridge with a reverse withstand voltage of 1800V.
4. The black-start power supply circuit of an energy storage converter as claimed in claim 1, wherein the input terminal of the dc-side current limiting module is connected to a dc power source through a fuse.
5. The black-start power supply circuit of the energy storage converter as claimed in claim 1, wherein the ac-side current-limiting module includes a resistor R3 and a resistor R4, one output terminal of the three-phase rectification module is connected to one input terminal of the bus pre-charge control module and the black-start power supply through a resistor R3, and the other output terminal of the three-phase rectification module is connected to the other input terminal of the bus pre-charge control module and the black-start power supply through a resistor R4.
6. The energy storage converter black start power supply circuit according to claim 1, wherein the dc side current limiting module comprises a diode D1, a diode D2, a resistor R1 and a resistor R2, the anode of the diode D1 is connected to the anode of the dc power supply, the cathode of the diode D1 is connected to one end of a resistor R1, the other end of the resistor R1 is connected to one input end of the bus pre-charging control module and the black start power supply, the cathode of the diode D2 is connected to the cathode of the dc power supply, the anode of the diode D2 is connected to one end of the resistor R2, and the other end of the resistor R2 is connected to the other input end of the bus pre-charging control module and the black start power supply.
7. The black-start power supply circuit of an energy storage converter according to claim 1, wherein the bus pre-charging control module comprises a switch KM2 and a switch KM3, one end of the switch KM2 is connected to one output terminal of the dc side current limiting module, one output terminal of the ac side current limiting module, and one input terminal of the black-start power supply, one end of the switch KM3 is connected to the other output terminal of the dc side current limiting module, the other output terminal of the ac side current limiting module, and the other input terminal of the black-start power supply, and the other end of the switch KM2 and the other end of the switch KM3 are both connected to a bus of the energy storage converter.
8. The black-start power supply circuit of the energy storage converter according to claim 1, further comprising a dc-side switching module, wherein an input terminal of the dc-side switching module is connected to a dc power supply, and an output terminal of the dc-side switching module is connected to the black-start power supply through a bus pre-charge control module.
9. The black-start power supply circuit of claim 8, wherein the output terminal of the DC-side switching module is connected to the bus pre-charge control module through a fuse.
10. The black-start power supply circuit of the energy storage converter as claimed in claim 8, wherein the dc-side switching module includes a circuit breaker Q2, one input terminal of the circuit breaker Q2 is connected to the positive terminal of the dc power supply, the other input terminal of the circuit breaker Q2 is connected to the negative terminal of the dc power supply, one output terminal of the circuit breaker Q2 is connected to one input terminal of the black-start power supply through a bus pre-charge control module, and the other output terminal of the circuit breaker Q2 is connected to the other input terminal of the black-start power supply through a bus pre-charge control module.
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| CN202111214776.XA CN113949151A (en) | 2021-10-19 | 2021-10-19 | Black-start power supply circuit of energy storage converter |
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| CN202111214776.XA CN113949151A (en) | 2021-10-19 | 2021-10-19 | Black-start power supply circuit of energy storage converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117154139A (en) * | 2023-10-27 | 2023-12-01 | 福建星云电子股份有限公司 | Flow battery activation device and method |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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