CN219678104U - Circuit breaker active switching-off circuit for PCS - Google Patents
Circuit breaker active switching-off circuit for PCS Download PDFInfo
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- CN219678104U CN219678104U CN202320324889.3U CN202320324889U CN219678104U CN 219678104 U CN219678104 U CN 219678104U CN 202320324889 U CN202320324889 U CN 202320324889U CN 219678104 U CN219678104 U CN 219678104U
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- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical group O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims description 6
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- 238000007599 discharging Methods 0.000 description 1
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Abstract
The utility model provides a breaker active switching-off circuit for PCS in the technical field of energy storage converters, which comprises a controller, a power supply T1, a power supply T2, a power supply T3, a power supply T4, a switching-off coil Q1, a switching-off coil Q2, a relay KM1, a relay KM2, a relay KM3, a terminal J1, a terminal J2 and a plurality of capacitors C1, wherein the power supply T1 is connected with the switching-off coil Q1; after each C1 is connected in parallel, one end is connected with pins 1 and 1 of T1 and T2, pins 1 and 2 of KM1 and pins 2 and J1 of KM3, and the other end is connected with pins 2 and 2 of T1 and T2, pins 4 of KM1 and pins 1 and J2 of Q1; pin 2 of Q1 is connected with pin 3 of KM 2; pin 2 of Q2 is connected with pin 3 of KM 3; pins 1 and 2 of T3 are connected with pins 7 and 8 of the controller; pin 1 of T4 is connected to pin 7 of the controller and pin 4 of T2, and pin 2 is connected to pin 8 of the controller and pin 3 of T2. The utility model has the advantages that: the switching-off cost of the PCS circuit breaker is greatly reduced.
Description
Technical Field
The utility model relates to the technical field of energy storage converters, in particular to an active switching-off circuit of a circuit breaker for PCS.
Background
The PCS (energy storage converter/powerconversion system) is used for controlling the charging and discharging processes of the energy storage battery, and can directly control the energy storage battery to supply power for the alternating current load under the condition of no power grid, and can control the energy storage battery to discharge or feed power to the power grid under the condition of connecting the power grid.
The ac output end and the dc input end of the high-power PCS are respectively equipped with an ac breaker and a dc breaker, and the ac breaker and the dc breaker need to be opened before dc and ac are supplied to the PCS, and if the ac breaker and the dc breaker are closed, direct power-on can cause overcurrent, thereby causing breakdown of the dc supporting capacitor or ablation of the internal breaker.
The circuit breakers of the PCS are all provided with a switching-off coil, and when the alternating current output end or the direct current input end of the PCS is normally electrified, the PCS controller can realize switching-off by controlling the breaking of the relay; when the PCS operates in the off-grid mode and the energy storage battery side is powered down, the alternating current circuit breaker and the direct current circuit breaker of the PCS are disconnected by virtue of the tripping coil, and the tripping coil does not belong to the standard allocation of the circuit breaker and needs to be purchased additionally, so that the breaking cost is increased.
Therefore, how to provide an active switching-off circuit for a PCS circuit breaker, so as to reduce the switching-off cost of the PCS circuit breaker, is a technical problem to be solved.
Disclosure of Invention
The utility model aims to solve the technical problem of providing an active switching-off circuit of a circuit breaker for PCS, which can reduce the switching-off cost of the PCS circuit breaker.
The utility model is realized in the following way: a breaker active switching-off circuit for PCS comprises a PCS controller, a switching power supply T1, a switching power supply T2, a switching power supply T3, a switching power supply T4, an alternating current switching-off coil Q1, a direct current switching-off coil Q2, a relay KM1 with a normally open contact, a relay KM2 with a normally closed contact, a relay KM3 with a normally closed contact, a positive electrode output terminal J1, a negative electrode output terminal J2 and a plurality of direct current capacitors C1;
after the direct-current capacitors C1 are connected in parallel, one end of each direct-current capacitor C1 is connected with a pin 1 of the switching power supply T1, a pin 1 of the switching power supply T2, a pin 1 of the relay KM1, a pin 2 of the relay KM2, a pin 2 of the relay KM3 and a positive output terminal J1, and the other end of each direct-current capacitor C1 is connected with the pin 2 of the switching power supply T1, the pin 2 of the switching power supply T2, a pin 4 of the relay KM1, a pin 1 of the alternating-current switching-off coil Q1, a pin 1 of the direct-current switching-off coil Q2 and a negative output terminal J2;
the pin 2 of the alternating current brake separating coil Q1 is connected with the pin 3 of the relay KM 2; the pin 2 of the direct current switching-off coil Q2 is connected with the pin 3 of the relay KM 3;
pins 1 and 2 of the switching power supply T3 are respectively connected with pins 7 and 8 of the PCS controller; the pin 1 of the switching power supply T4 is connected with the pin 7 of the PCS controller and the pin 4 of the switching power supply T2, and the pin 2 is connected with the pin 8 of the PCS controller and the pin 3 of the switching power supply T2;
pins 1, 2, 3, 4, 5 and 6 of the PCS controller are respectively connected with pin 2 of the relay KM1, pin 3 of the relay KM1, pin 4 of the relay KM2, pin 1 of the relay KM2, pin 4 of the relay KM3 and pin 1 of the relay KM 3.
Further, the switching power supply T1 is an ACDC power supply and is used for inputting 220VAC and outputting 220VDC; the switching power supply T2 is a DCDC power supply and is used for inputting 24VDC and outputting 220VDC; the switching power supply T3 is an ACDC power supply and is used for inputting 220VAC and outputting 24VDC; the switching power supply T4 is a DCDC power supply and is used for inputting 50-2000VDC and outputting 24VDC.
The utility model has the advantages that:
by arranging a PCS controller, a switching power supply T1, a switching power supply T2, a switching power supply T3, a switching power supply T4, an alternating current switching-off coil Q1, a direct current switching-off coil Q2, a relay KM1 with a normally open contact, a relay KM2 with a normally closed contact, a relay KM3 with a normally closed contact and a plurality of direct current capacitors C1; the input end of the switching power supply T2 is connected with the output end of the switching power supply T4, the input ends of the switching power supply T1 and the switching power supply T3 are connected with an AC source, the input end of the switching power supply T4 is connected with a DC source, and the switching power supply T3 and the switching power supply T4 supply power to the PCS controller; when the AC source and the DC source are powered down, the switching power supply T1, the switching power supply T2, the switching power supply T3 and the switching power supply T4 stop working, the PCS controller is powered down, the normally closed points of the relay KM2 and the relay KM3 are closed, the direct-current capacitor C1 supplies power to the alternating-current brake-separating coil Q1 and the direct-current brake-separating coil Q2 through the relay KM2 and the relay KM3 to realize active brake separation, a tripping coil is not needed, and the brake-separating cost of the PCS circuit breaker is greatly reduced.
Drawings
The utility model will be further described with reference to examples of embodiments with reference to the accompanying drawings.
Fig. 1 is a circuit diagram of a circuit breaker active switching circuit for a PCS according to the present utility model.
Detailed Description
The embodiment of the utility model solves the technical problem that the opening cost of the circuit breaker of the PCS is increased by opening the circuit breaker of the PCS through the tripping coil in the prior art by providing the active opening circuit of the circuit breaker for the PCS, and achieves the technical effect of greatly reducing the opening cost of the PCS circuit breaker.
The technical scheme in the embodiment of the utility model aims to solve the problems, and the overall thought is as follows: when the PCS controller is powered down, normally closed points of the relay KM2 and the relay KM3 are closed, the direct-current capacitor C1 supplies power to the alternating-current brake-separating coil Q1 and the direct-current brake-separating coil Q2 through the relay KM2 and the relay KM3 to realize active brake-separating, and the tripping coil is not needed to be relied on so as to reduce the brake-separating cost of the PCS circuit breaker.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
Referring to fig. 1, a preferred embodiment of an active switching-off circuit of a circuit breaker for a PCS of the present utility model includes a PCS controller, a switching power supply T1, a switching power supply T2, a switching power supply T3, a switching power supply T4, an ac switching-off coil Q1, a dc switching-off coil Q2, a normally open contact-carrying relay KM1, a normally closed contact-carrying relay KM2, a normally closed contact-carrying relay KM3, a positive output terminal J1, a negative output terminal J2, and a plurality of dc capacitors C1; the PCS controller is used for controlling the work of the active switching-off circuit of the circuit breaker, and in the specific implementation, only the controller capable of realizing the function is selected from the prior art, and the PCS controller is not limited to any model, such as an MCU of STM32F103 series of ST company, and the control program is well known to a person skilled in the art, and can be obtained by the person skilled in the art without the need of creative labor; the direct-current capacitor C1 is used for storing electric energy; the relay KM1 is used for outputting the state after the direct-current capacitor C1 is fully charged; the relay KM2 and the relay KM3 are used for providing 220VDC power for the alternating current switching-off coil Q1 and the direct current switching-off coil Q2; pin 4 (IO 1) of the PCS controller is used as a DO output for controlling the switching-off of the ac switching-off coil Q1; a pin 6 (IO 2) of the PCS controller is used as DO output for controlling the switching-off of the direct-current switching-off coil Q2; pin 2 (IO 3) of the PCS controller is used as DI input for detecting the state of the relay KM 1;
after the direct-current capacitors C1 are connected in parallel, one end of each direct-current capacitor C1 is connected with a pin 1 of the switching power supply T1, a pin 1 of the switching power supply T2, a pin 1 of the relay KM1, a pin 2 of the relay KM2, a pin 2 of the relay KM3 and a positive output terminal J1, and the other end of each direct-current capacitor C1 is connected with the pin 2 of the switching power supply T1, the pin 2 of the switching power supply T2, a pin 4 of the relay KM1, a pin 1 of the alternating-current switching-off coil Q1, a pin 1 of the direct-current switching-off coil Q2 and a negative output terminal J2;
the pin 2 of the alternating current brake separating coil Q1 is connected with the pin 3 of the relay KM 2; the pin 2 of the direct current switching-off coil Q2 is connected with the pin 3 of the relay KM 3;
pins 1 and 2 of the switching power supply T3 are respectively connected with pins 7 and 8 of the PCS controller; the pin 1 of the switching power supply T4 is connected with the pin 7 of the PCS controller and the pin 4 of the switching power supply T2, and the pin 2 is connected with the pin 8 of the PCS controller and the pin 3 of the switching power supply T2;
pins 1, 2, 3, 4, 5 and 6 of the PCS controller are respectively connected with pin 2 of the relay KM1, pin 3 of the relay KM1, pin 4 of the relay KM2, pin 1 of the relay KM2, pin 4 of the relay KM3 and pin 1 of the relay KM 3.
The switching power supply T1 is an ACDC power supply and is used for inputting 220VAC and outputting 220VDC, and is used for providing power for switching on and switching off of the alternating current switching-off coil Q1 and the direct current switching-off coil Q2; the switching power supply T2 is a DCDC power supply and is used for inputting 24VDC and outputting 220VDC, and is used for providing power for switching on and switching off of the alternating current switching-off coil Q1 and the direct current switching-off coil Q2; the switching power supply T3 is an ACDC power supply and is used for inputting 220VAC and outputting 24VDC and supplying power to the PCS controller; the switching power supply T4 is a DCDC power supply and is used for inputting 50-2000VDC and outputting 24VDC and is used for supplying power to the PCS controller and the switching power supply T2.
The working principle of the utility model is as follows:
when an AC source and a DC source are normally powered on, a PCS (power control system) operates, the PCS controller controls IO1 and IO2 to output a high level, coils of the relay KM2 and the relay KM3 are attracted and normally closed contacts are disconnected, and the AC switching-off coil Q1 and the DC switching-off coil Q2 cannot be powered on to keep an original closed state; when the alternating current brake-separating coil Q1 and the direct current brake-separating coil Q2 are required to be used for brake-separating, the PCS controller controls IO1 and IO2 to output low level, the coils of the relay KM2 and the relay KM3 are powered off, normally closed contacts are closed, and direct current 220V can be output to the alternating current brake-separating coil Q1 and the direct current brake-separating coil Q2 for brake-separating.
When the AC source or the DC source is normally powered, the switching power supply T1, the switching power supply T2, the switching power supply T3 and the switching power supply T4 work normally, the switching power supply T1 and the switching power supply T2 charge the direct-current capacitor C1, the direct-current capacitor C1 is fully charged to the required voltage and then the relay KM1 is attracted, the normally open contact of the relay KM1 is closed and fed back to the PCS controller through the IO3, and the electric energy is stored in the direct-current capacitor C1.
When the AC source and the DC source are powered down, the switching power supply T1, the switching power supply T2, the switching power supply T3 and the switching power supply T4 stop working, the 24VDC power supply of the PCS controller is lost, the coils of the relay KM2 and the relay KM3 are powered down, normally closed contacts are closed, and the direct current capacitor C1 supplies 220VDC to the alternating current brake-separating coil Q1 and the direct current brake-separating coil Q2 through the normally closed contacts of the relay KM2 and the relay KM3 respectively for brake-separating.
In summary, the utility model has the advantages that:
by arranging a PCS controller, a switching power supply T1, a switching power supply T2, a switching power supply T3, a switching power supply T4, an alternating current switching-off coil Q1, a direct current switching-off coil Q2, a relay KM1 with a normally open contact, a relay KM2 with a normally closed contact, a relay KM3 with a normally closed contact and a plurality of direct current capacitors C1; the input end of the switching power supply T2 is connected with the output end of the switching power supply T4, the input ends of the switching power supply T1 and the switching power supply T3 are connected with an AC source, the input end of the switching power supply T4 is connected with a DC source, and the switching power supply T3 and the switching power supply T4 supply power to the PCS controller; when the AC source and the DC source are powered down, the switching power supply T1, the switching power supply T2, the switching power supply T3 and the switching power supply T4 stop working, the PCS controller is powered down, the normally closed points of the relay KM2 and the relay KM3 are closed, the direct-current capacitor C1 supplies power to the alternating-current brake-separating coil Q1 and the direct-current brake-separating coil Q2 through the relay KM2 and the relay KM3 to realize active brake separation, a tripping coil is not needed, and the brake-separating cost of the PCS circuit breaker is greatly reduced.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the utility model, and that equivalent modifications and variations of the utility model in light of the spirit of the utility model will be covered by the claims of the present utility model.
Claims (2)
1. An active switching-off circuit of a circuit breaker for a PCS, characterized in that: the direct-current power supply comprises a PCS controller, a switching power supply T1, a switching power supply T2, a switching power supply T3, a switching power supply T4, an alternating-current switching-off coil Q1, a direct-current switching-off coil Q2, a normally-open contact-carrying relay KM1, a normally-closed contact-carrying relay KM2, a normally-closed contact-carrying relay KM3, a positive electrode output terminal J1, a negative electrode output terminal J2 and a plurality of direct-current capacitors C1;
after the direct-current capacitors C1 are connected in parallel, one end of each direct-current capacitor C1 is connected with a pin 1 of the switching power supply T1, a pin 1 of the switching power supply T2, a pin 1 of the relay KM1, a pin 2 of the relay KM2, a pin 2 of the relay KM3 and a positive output terminal J1, and the other end of each direct-current capacitor C1 is connected with the pin 2 of the switching power supply T1, the pin 2 of the switching power supply T2, a pin 4 of the relay KM1, a pin 1 of the alternating-current switching-off coil Q1, a pin 1 of the direct-current switching-off coil Q2 and a negative output terminal J2;
the pin 2 of the alternating current brake separating coil Q1 is connected with the pin 3 of the relay KM 2; the pin 2 of the direct current switching-off coil Q2 is connected with the pin 3 of the relay KM 3;
pins 1 and 2 of the switching power supply T3 are respectively connected with pins 7 and 8 of the PCS controller; the pin 1 of the switching power supply T4 is connected with the pin 7 of the PCS controller and the pin 4 of the switching power supply T2, and the pin 2 is connected with the pin 8 of the PCS controller and the pin 3 of the switching power supply T2;
pins 1, 2, 3, 4, 5 and 6 of the PCS controller are respectively connected with pin 2 of the relay KM1, pin 3 of the relay KM1, pin 4 of the relay KM2, pin 1 of the relay KM2, pin 4 of the relay KM3 and pin 1 of the relay KM 3.
2. The active switching circuit of a circuit breaker for a PCS of claim 1, wherein: the switching power supply T1 is an ACDC power supply and is used for inputting 220VAC and outputting 220VDC; the switching power supply T2 is a DCDC power supply and is used for inputting 24VDC and outputting 220VDC; the switching power supply T3 is an ACDC power supply and is used for inputting 220VAC and outputting 24VDC; the switching power supply T4 is a DCDC power supply and is used for inputting 50-2000VDC and outputting 24VDC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320324889.3U CN219678104U (en) | 2023-02-27 | 2023-02-27 | Circuit breaker active switching-off circuit for PCS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320324889.3U CN219678104U (en) | 2023-02-27 | 2023-02-27 | Circuit breaker active switching-off circuit for PCS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219678104U true CN219678104U (en) | 2023-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320324889.3U Active CN219678104U (en) | 2023-02-27 | 2023-02-27 | Circuit breaker active switching-off circuit for PCS |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219678104U (en) |
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2023
- 2023-02-27 CN CN202320324889.3U patent/CN219678104U/en active Active
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