CN112234636A - Energy storage converter DC main contactor multi-parallel system - Google Patents
Energy storage converter DC main contactor multi-parallel system Download PDFInfo
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- CN112234636A CN112234636A CN201910634193.9A CN201910634193A CN112234636A CN 112234636 A CN112234636 A CN 112234636A CN 201910634193 A CN201910634193 A CN 201910634193A CN 112234636 A CN112234636 A CN 112234636A
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- contactor
- control board
- main contactor
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- 238000004146 energy storage Methods 0.000 title claims abstract description 16
- 238000004891 communication Methods 0.000 claims description 16
- 238000001914 filtration Methods 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 description 12
- 238000007599 discharging Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000001681 protective 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
- 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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Abstract
本发明提供储能变流器直流主接触器多并联系统，DC+、DC‑接电池正负极，合上直流断路器QF1、交流断路器QF2，PCS系统交流侧供电，开关电源L得电，输出24VDC给控制板，控制板启动，输出信号启动软启接触器，软启接触器都闭合完毕，反馈信号给控制板，控制板再闭合接触器组KM2～KM4(或者更多个接触器)，控制板检测所有接触器闭合完成，控制板断开软启接触器KM1，输出信号给逆变模块，启动系统，同时检测到逆变输出电压，闭合交流接触器KM22，得到接触器闭合完成信号，整个PCS系统启动完成，采用多个并联的接触器，提高了PCS的使用可靠性，降低使用成本。
The invention provides a multi-parallel system of the DC main contactors of the energy storage converter, DC+ and DC- are connected to the positive and negative electrodes of the battery, the DC circuit breaker QF1 and the AC circuit breaker QF2 are closed, the AC side of the PCS system is powered, and the switching power supply L is powered, Output 24VDC to the control board, the control board starts, the output signal starts the soft-start contactor, the soft-start contactor is closed, the feedback signal is sent to the control board, and the control board closes the contactor group KM2~KM4 (or more contactors) , the control board detects that all contactors are closed, the control board disconnects the soft-start contactor KM1, outputs a signal to the inverter module, starts the system, detects the inverter output voltage at the same time, closes the AC contactor KM22, and gets the contactor closing completion signal , the entire PCS system is started up, and multiple parallel contactors are used, which improves the reliability of the PCS and reduces the cost of use.
Description
Technical Field
The invention relates to the field of circuits, in particular to a multi-parallel system of a direct-current main contactor of an energy storage converter.
Background
The energy storage converter (Power Conversion System-PCS) can control the charging and discharging processes of the storage battery, carry out alternating current and direct current Conversion, and can directly supply Power for alternating current loads under the condition of no Power grid.
The PCS is composed of a DC/AC bidirectional converter, a control unit and the like, the PCS controller receives a background control instruction through communication, the converter is controlled to charge or discharge the battery according to the symbol and the size of the power instruction, the active power and the reactive power of a power grid are adjusted, the PCS controller communicates with the BMS through a CAN interface, the state information of the battery pack is obtained, the protective charging and discharging of the battery CAN be realized, and the operation safety of the battery is ensured.
At present, only one high-power main contactor and a small contactor are arranged on the direct current side of the PCS in parallel connection with resistors to carry out soft start operation on the whole system.
CN201721828943.9 an energy storage system and an energy storage converter. The energy storage converter mainly comprises a cascade bidirectional DC/DC module and a bidirectional DC/AC module, wherein the low-voltage side of the bidirectional DC/DC module is used for being connected into a storage battery pack, the high-voltage side of the bidirectional DC/AC module is used for being connected to an alternating current network, the bidirectional DC/DC module comprises at least two bidirectional DC/DC circuits which are connected in parallel, and each bidirectional DC/DC circuit is used for being connected with a storage battery so as to realize the charging/discharging function of the storage battery. According to the energy storage converter, the bidirectional DC/DC module is formed by the plurality of parallel bidirectional DC/DC circuits, each bidirectional DC/DC circuit is used for being connected with one battery, and the bidirectional DC/DC module has high boost ratio and expansion flexibility, so that the energy storage converter is beneficial to solving the capacity configuration problem of an energy storage system, the cost is reduced, and the reliability of the system is improved.
Contents of the invention
This patent application provides many parallel system of energy storage converter direct current main contactor, improves PCS's use reliability, reduces use cost, in order to realize above-mentioned purpose, adopts following technical scheme: the method comprises the following steps: a battery, a control panel,
one end of the direct current breaker QF1 is connected with the output end of the battery;
the main contactor KM4 is connected to the other end of the direct current breaker QF1 and is in communication connection with the control panel;
the soft starting contactor KM1 is connected with the main contactor KM4 in parallel and is in communication connection with the control board;
the contactor group is connected with the main contactor KM4 in parallel and is in communication connection with the control board;
the input end of the inversion module is connected with the main contactor KM4 and is in communication connection with the control board;
an AC filter module connected with the output end of the inverter module,
the input end of the alternating current contactor KM22 is connected with the alternating current filtering module and is in communication connection with the control panel;
the input end of the alternating current breaker QF2 is connected with the alternating current filtering module, and the output end of the alternating current breaker QF2 is connected with the live wire end of the switching power supply;
and the zero line of the switch power supply is connected with the alternating current filter, and the output end of the switch power supply is connected with the control panel and used for supplying power to the control panel.
Preferably, the switching power supply outputs 24v dc power to the control board.
Preferably, the contactor group comprises a plurality of contactors connected in parallel.
Preferably, the output end of the inversion module is provided with a voltage sampling point and is connected with the sampling end of the control panel through a wire.
The invention has the beneficial effects that: this patent application adopts a plurality of contactors that connect in parallel, has improved PCS's use reliability, reduces use cost.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Detailed Description
As shown in fig. 1, the present invention includes: batteries (not shown in the figure, the positive and negative electrodes of the batteries are connected with DC + and DC-), a control board,
one end of the direct current breaker QF1 is connected with the output end of the battery;
the main contactor KM4 is connected to the other end of the direct current breaker QF1, is in communication connection with the control board and feeds back opening and closing state information to the control board;
the contactor group (comprising KM2 and KM3) is connected with the main contactor KM4 in parallel, is in communication connection with the control board, feeds back opening and closing state information to the control board and is controlled by the control board;
the soft starting contactor KM1 is connected in series with the resistor R1 and then connected with the main contactor KM4 in parallel, the soft starting contactor KM1 is in communication connection with the control board, the opening and closing state information is fed back to the control board, and the control board controls the soft contactor KM1 to be closed;
the input end of the inversion module is connected with the main contactor KM4 and is in communication connection with the control board;
an AC filter module connected with the output end of the inverter module,
the input end of the alternating current contactor KM22 is connected with the alternating current filtering module and is in communication connection with the control panel;
the input end of the alternating current breaker QF2 is connected with the alternating current filtering module, and the output end of the alternating current breaker QF2 is connected with the live wire end of the switching power supply;
and the zero line of the switch power supply is connected with the alternating current filter, and the output end of the switch power supply is connected with the control panel and used for supplying power to the control panel.
Preferably, the switching power supply outputs 24v dc power to the control board.
Preferably, the contactor group comprises a plurality of contactors connected in parallel.
Preferably, the output end of the inversion module is provided with a voltage sampling point and is connected with the sampling end of the control panel through a wire.
DC +, DC-connect positive negative pole of battery, close direct current breaker QF1, exchange breaker QF2, PCS system alternating current side power supply, switching power supply L gets the electricity, output 24VDC gives the control panel, the control panel starts, output signal starts the soft contactor, the soft contactor is all closed, feedback signal gives the control panel, the control panel recloses contactor group KM 2-KM 4 (or more contactors), the control panel detects that all contactors are closed, control panel disconnection soft contactor KM1, output signal gives the contravariant module, the start-up system, detect contravariant output voltage simultaneously, closed alternating current contactor KM22, obtain contactor closed completion signal, whole PCS system starts and accomplishes.
And a plurality of contactors connected in parallel are adopted, so that the use reliability of the PCS is improved, and the use cost is reduced.
The above-described embodiments are merely illustrative of the principles and utilities of the present patent application and are not intended to limit the present patent application. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of this patent application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of this patent application.
Claims (4)
1. Many parallel system of energy storage converter direct current main contactor, its characterized in that: the method comprises the following steps: a battery, a control panel,
one end of the direct current breaker QF1 is connected with the output end of the battery;
the main contactor KM4 is connected to the other end of the direct current breaker QF1 and is in communication connection with the control panel;
the soft starting contactor KM1 is connected with the main contactor KM4 in parallel and is in communication connection with the control board;
the contactor group is connected with the main contactor KM4 in parallel and is in communication connection with the control board;
the input end of the inversion module is connected with the main contactor KM4 and is in communication connection with the control board;
an AC filter module connected with the output end of the inverter module,
the input end of the alternating current contactor KM22 is connected with the alternating current filtering module and is in communication connection with the control panel;
the input end of the alternating current breaker QF2 is connected with the alternating current filtering module, and the output end of the alternating current breaker QF2 is connected with the live wire end of the switching power supply;
and the zero line of the switch power supply is connected with the alternating current filter, and the output end of the switch power supply is connected with the control panel and used for supplying power to the control panel.
2. The energy storage converter direct current main contactor multi-parallel system according to claim 1, wherein: the switching power supply outputs 24v of direct current to the control board.
3. The energy storage converter direct current main contactor multi-parallel system according to claim 1, wherein: the contactor group comprises a plurality of contactors connected in parallel.
4. The energy storage converter direct current main contactor multi-parallel system according to claim 1, wherein: the output end of the inversion module is provided with a voltage sampling point and is connected with the sampling end of the control panel through a wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910634193.9A CN112234636A (en) | 2019-07-15 | 2019-07-15 | Energy storage converter DC main contactor multi-parallel system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910634193.9A CN112234636A (en) | 2019-07-15 | 2019-07-15 | Energy storage converter DC main contactor multi-parallel system |
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| CN112234636A true CN112234636A (en) | 2021-01-15 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114460866A (en) * | 2021-12-27 | 2022-05-10 | 西门子工厂自动化工程有限公司 | Signal control method and device for main loop and computer readable medium |
| CN116742679A (en) * | 2023-08-10 | 2023-09-12 | 上海百竹成航新能源有限责任公司 | Reverse starting energy storage system and reverse starting method |
| WO2024041383A1 (en) * | 2022-08-24 | 2024-02-29 | 华为数字能源技术有限公司 | Energy storage system and power supply control method for battery management system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109802558A (en) * | 2019-03-11 | 2019-05-24 | 中天昱品科技有限公司 | A kind of soft starting system of the DC side of energy accumulation current converter and its method |
| CN210404757U (en) * | 2019-07-15 | 2020-04-24 | 江苏多益能源科技有限公司 | Energy storage converter direct current main contactor multi-parallel system |
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2019
- 2019-07-15 CN CN201910634193.9A patent/CN112234636A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109802558A (en) * | 2019-03-11 | 2019-05-24 | 中天昱品科技有限公司 | A kind of soft starting system of the DC side of energy accumulation current converter and its method |
| CN210404757U (en) * | 2019-07-15 | 2020-04-24 | 江苏多益能源科技有限公司 | Energy storage converter direct current main contactor multi-parallel system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114460866A (en) * | 2021-12-27 | 2022-05-10 | 西门子工厂自动化工程有限公司 | Signal control method and device for main loop and computer readable medium |
| WO2024041383A1 (en) * | 2022-08-24 | 2024-02-29 | 华为数字能源技术有限公司 | Energy storage system and power supply control method for battery management system |
| CN116742679A (en) * | 2023-08-10 | 2023-09-12 | 上海百竹成航新能源有限责任公司 | Reverse starting energy storage system and reverse starting method |
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