CN112234636A - Energy storage converter direct current main contactor multi-parallel system - Google Patents
Energy storage converter direct current 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 panel
- direct current
- main contactor
- energy storage
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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
Abstract
The invention provides a multi-parallel system of direct-current main contactors of an energy storage converter, wherein a DC + and a DC-are connected with a positive electrode and a negative electrode of a battery, the direct-current breaker QF1 and an alternating-current breaker QF2 are closed, power is supplied to an alternating-current side of a PCS system, a switching power supply L is electrified, 24VDC is output to a control panel, the control panel is started, a signal is output to start a soft start contactor, the soft start contactor is closed completely, a feedback signal is sent to the control panel, the control panel closes a contactor group KM 2-KM 4 (or more contactors), the control panel detects that all contactors are closed completely, the control panel opens the soft start contactor KM1, the signal is output to an inversion module, the system is started, an inversion output voltage is detected at the same time, the alternating-current contactor KM22 is closed, a.
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 direct current main contactor multi-parallel system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910634193.9A CN112234636A (en) | 2019-07-15 | 2019-07-15 | Energy storage converter direct current main contactor multi-parallel system |
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| Publication Number | Publication Date |
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| CN112234636A true CN112234636A (en) | 2021-01-15 |
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| CN201910634193.9A Pending CN112234636A (en) | 2019-07-15 | 2019-07-15 | Energy storage converter direct current main contactor multi-parallel system |
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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 |
-
2019
- 2019-07-15 CN CN201910634193.9A patent/CN112234636A/en active Pending
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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