CN218124321U - Power supply circuit of energy storage converter - Google Patents
Power supply circuit of energy storage converter Download PDFInfo
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- CN218124321U CN218124321U CN202221635935.3U CN202221635935U CN218124321U CN 218124321 U CN218124321 U CN 218124321U CN 202221635935 U CN202221635935 U CN 202221635935U CN 218124321 U CN218124321 U CN 218124321U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The utility model provides an energy storage converter's supply circuit, include: the input end of the alternating current power supply module is connected with a three-phase power supply, and the output end of the alternating current power supply module is connected with the first input end of the power supply conversion module; the output end of the direct current power supply module is connected with the second input end of the power supply conversion module, and the input end of the direct current power supply module is connected with the output end of the alternating current power supply module; the input end of the energy storage converter is connected with the output end of the power conversion module, and the first output end of the energy storage converter is connected with the other end of the alternating current breaker; the alternating current power supply module charges the direct current power supply module and supplies power to the energy storage converter when the three-phase power supply is switched on, and controls the direct current power supply module to supply power to the energy storage converter when the three-phase power supply is switched off. The beneficial effects are that the utility model discloses a mode that built-in DC power supply and outside AC power supply combined together, DC power supply when can realizing the disconnection independently starts the power supply for energy storage converter.
Description
Technical Field
The utility model relates to an energy storage converter technical field especially relates to an energy storage converter's supply circuit.
Background
With the development of power electronic technology, the energy storage converter is more and more widely applied to new energy grid-connected occasions such as photovoltaic and wind power, power grid frequency modulation and peak regulation, user side and the like. The energy of the energy storage converter can flow in two directions, electric energy which is abundant in a power grid can be stored in the energy storage battery through AC/DC conversion, the electric energy stored in the battery can also be output to the power grid through DC/AC conversion, and the energy storage converter becomes key equipment of a novel power grid system. The stable and reliable operation of the energy storage converter is guaranteed, the stability of a novel power grid system is achieved, and especially when an alternating current power grid is powered off and needs to be switched to an energy storage system for off-grid power supply, the energy storage converter has independent and reliable starting capability.
The other scheme is AC/DC power supply, and power supply is carried out by combining external 220V AC power supply and 220V DC power supply, and the scheme also needs to ensure that at least one path of power supply keeps power supply, and the problem of high cost, complex equipment, overlarge occupied space and the like can still not be realized independently under the condition that a power grid is powered off and the external 220V AC power supply does not exist.
Disclosure of Invention
To the problem that exists among the prior art, the utility model provides an energy storage converter's supply circuit, include:
the input end of the alternating current power supply module is connected with an external three-phase power supply, and the output end of the alternating current power supply module is connected with the first input end of a power supply conversion module;
the output end of the direct current power supply module is connected with the second input end of the power conversion module, and the input end of the direct current power supply module is connected with the output end of the alternating current power supply module;
one end of the alternating current breaker is connected with the input end of the alternating current power supply module;
the input end of the energy storage converter is connected with the output end of the power conversion module, and the first output end of the energy storage converter is connected with the other end of the alternating current circuit breaker;
the alternating current power supply module charges the direct current power supply module when the three-phase power supply is switched on, outputs voltage to the power supply conversion module to supply power to the energy storage converter, and controls the direct current power supply module to output voltage to the power supply conversion module to supply power to the energy storage converter when the three-phase power supply is switched off;
the alternating current breaker is disconnected when the three-phase power supply is disconnected and is connected when the energy storage converter receives the output voltage of the direct current power supply module so as to control the alternating current power supply module to recover power supply.
Preferably, the ac power supply module includes:
the input end of the alternating current power supply port is connected with the three-phase power supply;
the input end of the isolation transformer is connected with the output end of the alternating current power supply port;
the input end of the rectifier is connected with the output end of the isolation transformer, the positive electrode port of the rectifier is connected with the first input end of the energy storage converter, and the negative electrode port of the rectifier is connected with the second input end of the energy storage converter;
the input end of the alternating current power supply port is used as the input end of the alternating current power supply module, and the anode port of the rectifier is used as the output end of the alternating current power supply module.
Preferably, the rectifier is a three-phase rectifier bridge.
Preferably, the dc power supply module includes:
a bidirectional voltage converter, wherein a positive terminal of the bidirectional voltage converter is connected to the first input terminal of the energy storage converter and a positive terminal of the rectifier, respectively, and a negative terminal of the bidirectional voltage converter is connected to the second input terminal of the energy storage converter and a negative terminal of the rectifier, respectively;
the input end of the direct current storage battery is connected with the output end of the bidirectional voltage converter;
and when the three-phase power supply is switched on, the positive port of the bidirectional voltage converter is used as the input end of the direct current power supply module, and when the three-phase power supply is switched off, the positive port of the bidirectional voltage converter is used as the output end of the direct current power supply module.
Preferably, a first anti-reverse module is arranged between the first input end of the energy storage converter and the ac power supply module, and the first anti-reverse module includes:
the anode of the first diode is connected with the output end of the alternating current power supply module;
and the anode of the second diode is connected with the cathode of the first diode, and the cathode of the second diode is connected with the first input end of the energy storage converter.
Preferably, a second anti-reverse module is arranged between the second input end of the energy storage converter and the dc power supply module, and the second anti-reverse module includes:
a third diode, an anode of the third diode is connected with the second input end of the energy storage converter;
and the anode of the fourth diode is respectively connected with the cathode of the third diode and the output end of the direct current power supply module, and the cathode of the fourth diode is connected with the output end of the alternating current power supply module.
Preferably, the energy storage converter further comprises a bidirectional voltage conversion module, the bidirectional voltage conversion module is respectively connected with the other end of the alternating current circuit breaker and the second output end of the energy storage converter, and the bidirectional voltage conversion module controls the alternating current circuit breaker to be conducted when receiving the output voltage of the energy storage converter.
Preferably, the bidirectional voltage conversion module is connected with the third output end of the energy storage converter, and the external battery pack is connected with the third output end of the energy storage converter.
Preferably, a filter is connected between the bidirectional voltage conversion module and the ac circuit breaker.
Preferably, an alternating current lightning protection device is arranged between the alternating current circuit breaker and the alternating current power supply module, and a direct current lightning protection device is arranged between the battery pack and the direct current isolating switch.
The technical scheme has the following advantages or beneficial effects: the utility model discloses a mode that built-in DC supply and outside AC supply combined together can realize through built-in DC supply independent start energy storage converter under the condition that does not have outside AC supply to resume AC supply module power supply after energy storage converter starts to accomplish, it is simple, low cost and use convenient to constitute.
Drawings
Fig. 1 is an electrical schematic diagram of the circuit according to the preferred embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The present invention is not limited to this embodiment, and other embodiments may also belong to the scope of the present invention as long as the gist of the present invention is satisfied.
In a preferred embodiment of the present invention, based on the above problems existing in the prior art, there is provided a power supply circuit of an energy storage converter, as shown in fig. 1, including:
the input end of the alternating current power supply P module 1 is connected with an external three-phase power supply, and the output end of the alternating current power supply module 1 is connected with the first input end of a power supply conversion module 2;
the output end of the direct current power supply module 3 is connected with the second input end of the power supply conversion module 2, and the input end of the direct current power supply module 3 is connected with the output end of the alternating current power supply module 1;
one end of the alternating current breaker 4 is connected with the input end of the alternating current power supply module 1;
the input end of the energy storage converter 5 is connected with the output end of the power conversion module 2, and the first output end of the energy storage converter 5 is connected with the other end of the alternating current breaker 4;
the alternating current power supply module 1 charges the direct current power supply module 3 when the three-phase power supply is conducted, outputs voltage to the power supply conversion module 2 to supply power to the energy storage converter 5, and controls the direct current power supply module 3 to output voltage to the power supply conversion module 2 to supply power to the energy storage converter 5 when the three-phase power supply is disconnected;
the ac circuit breaker 4 is turned off when the three-phase power is turned off, and is turned on when the energy storage converter 5 receives the output voltage of the dc power supply module 3 to control the ac power supply module 1 to resume power supply.
Specifically, in this embodiment, it is considered that the power supply circuit for supplying power to the energy storage converter 5 in the prior art is generally divided into two types, one is a scheme of supplying power by combining an external 220V alternating current and an alternating current type uninterruptible power supply, and this scheme can also realize stable power supply and independent start of the energy storage converter 5 in a short time, but requires one power supply of the external 220V alternating current and the alternating current type uninterruptible power supply to always maintain a power supply state, and the other is a scheme of supplying power by combining an external 220V alternating current and a 220V direct current, and this scheme also needs to ensure that at least one power supply of the external 220V alternating current and the 220V direct current always maintains a power supply state, and the energy storage converter 5 cannot still be independently started under the condition that the power grid is powered off and the external 220V alternating current is not present, so in this embodiment, the scheme of using the internal direct current power supply module 3 and the external alternating current power supply module 1 is not affected by the power grid power off, and can always supply the energy storage converter 5.
Preferably, three power interfaces are arranged between the power conversion module 2 and the energy storage converter 5, the three power interfaces are respectively a direct current 220V interface, a direct current 24V interface and a direct current 5V interface, and the power conversion module 2 converts an alternating current voltage output by the alternating current power supply module 1 or a direct current voltage output by the direct current power supply module 3 into a direct current voltage with a corresponding magnitude and outputs the direct current voltage to the corresponding power interface.
Preferably, when the ac power supply module 1 outputs a voltage to the power conversion module 2, the input terminal of the dc power supply module 1 can receive the voltage for charging, and when the ac power supply module 1 does not output a voltage to the power conversion module 2, the input terminal of the dc power supply module 1 does not receive the voltage for automatically discharging.
Specifically, in this embodiment, when the power grid is normal, the three-phase power is in the on state, the ac power supply module 1 can supply power for the energy storage converter 5, and simultaneously can charge the dc power supply module 3, and when the power grid has a power failure, the three-phase power is in the off state, the ac power supply module 1 cannot supply power for the energy storage converter 5, and at this time, the dc power supply module 3 supplies power for the energy storage converter 5.
Preferably, in the process that the direct current power supply module 3 supplies power to the energy storage converter 5, if the power grid is recovered to be normal, the power supply is switched to supply power to the energy storage converter 5 through the alternating current power supply module 1, and the direct current power supply module 3 enters a charging state.
Preferably, after the power grid has a power failure, the ac circuit breaker 4 is in a disconnected state, the ac power supply module 3 stops supplying power, the dc power supply module 3 starts supplying power, at this time, the energy storage converter 5 receives the voltage output by the dc power supply module 3 to start, the energy storage converter 5 outputs the voltage to the ac circuit breaker 4 after starting, so as to control the ac circuit breaker 4 to be switched on, and after the ac circuit breaker 4 is switched on, the ac power supply module 1 receives the input voltage again and starts supplying power.
In a preferred embodiment of the present invention, the ac power supply module 1 includes:
an alternating current power supply port 11, wherein the input end of the alternating current power supply port 11 is connected with a three-phase power supply;
an isolation transformer 12, the input end of the isolation transformer 12 is connected with the output end of the alternating current power supply port 11;
the input end of the rectifier 13 is connected with the output end of the isolation transformer 12, the positive electrode port of the rectifier 13 is connected with the first input end of the energy storage converter 5, and the negative electrode port of the rectifier 13 is connected with the second input end of the energy storage converter 5;
the input end of the ac power supply port 11 serves as the input end of the ac power supply module 1, and the positive electrode port of the rectifier 13 serves as the output end of the ac power supply module 1.
In the preferred embodiment of the present invention, the rectifier 13 is a three-phase rectifier bridge.
In a preferred embodiment of the present invention, the dc power supply module 3 includes:
a bidirectional voltage converter 31, wherein a positive terminal of the bidirectional voltage converter 31 is connected to the first input terminal of the energy storage converter 5 and a positive terminal of the rectifier 13, respectively, and a negative terminal of the bidirectional voltage converter 31 is connected to the second input terminal of the energy storage converter 5 and a negative terminal of the rectifier 13, respectively;
a direct current storage battery 32, wherein the input end of the direct current storage battery 32 is connected with the output end of the bidirectional voltage converter 31;
the positive terminal of the bidirectional voltage converter 31 is used as the input terminal of the dc power supply module 3 when the three-phase power supply is turned on, and the positive terminal of the bidirectional voltage converter 31 is used as the output terminal of the dc power supply module 3 when the three-phase power supply is turned off.
Specifically, in this embodiment, when the power grid fails, the ac power supply module 1 stops supplying power, the dc storage battery 32 supplies power to the energy storage converter 5 through the bidirectional voltage converter 31, and thus reliable operations such as starting and stopping of the energy storage converter 5 are completed, once the energy storage converter 5 completes starting, the energy storage system normally operates, the ac power supply module 1 resumes supplying power, and the dc power supply module 3 automatically exits, so that the capacity of the dc storage battery 32 does not need to be large, and it is sufficient to start the energy storage converter 5.
Preferably, the input terminal of the bidirectional voltage converter 31 is capable of receiving voltage when the ac power supply module 1 is supplying power, thereby controlling the dc storage battery 32 to be charged, and the input terminal of the bidirectional voltage converter 31 does not receive voltage when the ac power supply module 1 stops supplying power, thereby controlling the dc storage battery 32 to be discharged.
The utility model discloses an in the preferred embodiment, be equipped with a first anti-module 6 of preventing between the first input of energy storage converter 5 and the AC power supply module 1, the first anti-module 6 of preventing includes:
the anode of the first diode D1 is connected with the output end of the alternating current power supply module 1;
and the anode of the second diode D2 is connected with the cathode of the first diode D1, and the cathode of the second diode D2 is connected with the first input end of the energy storage converter 5.
The utility model discloses an in the preferred embodiment, be equipped with a second between the second input of energy storage converter 5 and DC power supply module 3 and prevent anti-module 7, the second prevents that anti-module 7 includes:
the anode of the third diode D3 is connected with the second input end of the energy storage converter 5;
and the anode of the fourth diode D4 is connected to the cathode of the third diode D3 and the output end of the dc power supply module 3, and the cathode of the fourth diode D4 is connected to the output end of the ac power supply module 1.
Specifically, in this embodiment, when the ac power supply module 1 supplies power, the output voltage of the positive port of the rectifier 13 flows through the first diode D1 and the second diode D2 to the first input end of the energy storage converter 5, and then flows through the third diode D3 and the fourth diode D4 via the second input end in sequence to keep the negative port of the rectifier 13 in place to form a complete power supply loop, and when the dc power supply module 3 supplies power, the output voltage of the positive port of the bidirectional voltage converter 31 flows through the second diode D2 to the first input end of the energy storage converter 5, and then flows through the third diode D3 to the negative port via the second input end in sequence to form a complete power supply loop.
Preferably, when the dc power supply module 3 supplies power, the second diode D2 provides a reverse prevention function to prevent the voltage output by the dc power supply module 3 from flowing to the ac power supply module 1.
Preferably, the first input end of the energy storage converter 5 is a positive terminal, and the second input end of the energy storage converter 5 is a negative terminal.
The utility model discloses an in the embodiment of preferred, still include a two-way voltage conversion module 8, connect the other end of AC circuit breaker 3 and the second output of energy storage converter 5 respectively, control AC circuit breaker 3 and switch on when two-way voltage conversion module 8 received the output voltage of energy storage converter 5.
Specifically, in the present embodiment, the bidirectional voltage conversion module 8 continuously outputs current to the ac circuit breaker 3 when receiving the output voltage of the energy storage converter 5 to ensure that the ac circuit breaker 3 is turned on.
The preferred embodiment of the present invention further comprises a dc isolation switch 9, which is connected to the bidirectional voltage conversion module 8, the third output terminal of the energy storage converter 5 and an external battery pack, and the dc isolation switch 9 is disconnected when receiving the output voltage of the energy storage converter 5.
In the preferred embodiment of the present invention, a filter 10 is connected between the bidirectional voltage conversion module 8 and the ac circuit breaker 3.
Specifically, in the present embodiment, the filter 10 includes:
one end of the first resistor R1 is connected with one end of the bidirectional voltage conversion module 8;
one end of the second resistor R2 is connected with one end of the bidirectional voltage conversion module 8;
one end of the third resistor R3 is connected with one end of the bidirectional voltage conversion module 8;
one end of the first capacitor C1 is connected with the other end of the first resistor R1, and the other end of the first capacitor C1 is connected with the other end of the second resistor R2;
one end of the second capacitor C2 is connected with one end of the first capacitor C1 and the other end of the first resistor R1 respectively, and the other end of the second capacitor C2 is connected with the third resistor R3;
and one end of the third capacitor C3 is connected with the other end of the first capacitor C1 and the other end of the second resistor R2 respectively, and the other end of the third capacitor C3 is connected with the other end of the second capacitor C2 and the other end of the third resistor R3 respectively.
The utility model discloses an in the preferred embodiment, be equipped with an interchange lightning protection device PE1 between interchange circuit breaker 3 and the interchange power supply module 1, be equipped with a direct current lightning protection device PE2 between group battery and the direct current isolator 9.
Specifically, in the present embodiment, a first fuse F1 and a second fuse F2 are provided between the battery pack and the dc isolation switch 9 for circuit protection.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope and the embodiments of the present invention, and it should be appreciated by those skilled in the art that the equivalent and obvious modifications made in the description and the drawings should be included within the scope of the present invention.
Claims (10)
1. A power supply circuit for a power converter, comprising:
the input end of the alternating current power supply module is connected with an external three-phase power supply, and the output end of the alternating current power supply module is connected with the first input end of a power supply conversion module;
the output end of the direct current power supply module is connected with the second input end of the power conversion module, and the input end of the direct current power supply module is connected with the output end of the alternating current power supply module;
one end of the alternating current breaker is connected with the input end of the alternating current power supply module;
the input end of the energy storage converter is connected with the output end of the power conversion module, and the first output end of the energy storage converter is connected with the other end of the alternating current circuit breaker;
the alternating current power supply module charges the direct current power supply module when the three-phase power supply is switched on, outputs voltage to the power supply conversion module to supply power to the energy storage converter, and controls the direct current power supply module to output voltage to the power supply conversion module to supply power to the energy storage converter when the three-phase power supply is switched off;
and the alternating current breaker is disconnected when the three-phase power supply is disconnected and is connected when the energy storage converter receives the output voltage of the direct current power supply module so as to control the alternating current power supply module to recover power supply.
2. The power supply circuit according to claim 1, wherein the ac power supply module includes:
the input end of the alternating current power supply port is connected with the three-phase power supply;
the input end of the isolation transformer is connected with the output end of the alternating current power supply port;
the input end of the rectifier is connected with the output end of the isolation transformer, the positive electrode port of the rectifier is connected with the first input end of the energy storage converter, and the negative electrode port of the rectifier is connected with the second input end of the energy storage converter;
the input end of the alternating current power supply port is used as the input end of the alternating current power supply module, and the anode port of the rectifier is used as the output end of the alternating current power supply module.
3. The power supply circuit of claim 2, wherein the rectifier is a three-phase rectifier bridge.
4. The power supply circuit according to claim 2, wherein the dc power supply module comprises:
a bidirectional voltage converter, wherein a positive terminal of the bidirectional voltage converter is connected to the first input terminal of the energy storage converter and a positive terminal of the rectifier, respectively, and a negative terminal of the bidirectional voltage converter is connected to the second input terminal of the energy storage converter and a negative terminal of the rectifier, respectively;
the input end of the direct current storage battery is connected with the output end of the bidirectional voltage converter;
and when the three-phase power supply is switched on, the positive port of the bidirectional voltage converter is used as the input end of the direct current power supply module, and when the three-phase power supply is switched off, the positive port of the bidirectional voltage converter is used as the output end of the direct current power supply module.
5. The power supply circuit according to claim 1, wherein a first anti-reverse module is disposed between the first input terminal of the energy storage converter and the ac power supply module, and the first anti-reverse module comprises:
the anode of the first diode is connected with the output end of the alternating current power supply module;
and the anode of the second diode is connected with the cathode of the first diode, and the cathode of the second diode is connected with the first input end of the energy storage converter.
6. The power supply circuit according to claim 1, wherein a second anti-reverse module is disposed between the second input terminal of the energy storage converter and the dc power supply module, and the second anti-reverse module comprises:
a third diode, an anode of the third diode is connected with the second input end of the energy storage converter;
and the anode of the fourth diode is respectively connected with the cathode of the third diode and the output end of the direct current power supply module, and the cathode of the fourth diode is connected with the output end of the alternating current power supply module.
7. The power supply circuit of claim 1, further comprising a bidirectional voltage conversion module connected to the other end of the ac circuit breaker and the second output terminal of the energy storage converter, respectively, wherein the bidirectional voltage conversion module controls the ac circuit breaker to be turned on when receiving the output voltage of the energy storage converter.
8. The power supply circuit of claim 7, further comprising a dc isolation switch connected to the bidirectional voltage conversion module, the third output terminal of the energy storage converter and an external battery pack, respectively, wherein the dc isolation switch is turned off when receiving the output voltage of the energy storage converter.
9. The power supply circuit of claim 7 wherein a filter is coupled between said bi-directional voltage conversion module and said ac circuit breaker.
10. The power supply circuit of claim 8, wherein an ac lightning protector is disposed between the ac circuit breaker and the ac power supply module, and a dc lightning protector is disposed between the battery pack and the dc isolation switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221635935.3U CN218124321U (en) | 2022-06-28 | 2022-06-28 | Power supply circuit of energy storage converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221635935.3U CN218124321U (en) | 2022-06-28 | 2022-06-28 | Power supply circuit of energy storage converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218124321U true CN218124321U (en) | 2022-12-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221635935.3U Active CN218124321U (en) | 2022-06-28 | 2022-06-28 | Power supply circuit of energy storage converter |
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| Country | Link |
|---|---|
| CN (1) | CN218124321U (en) |
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- 2022-06-28 CN CN202221635935.3U patent/CN218124321U/en active Active
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