Energy storage system and black start method
AssigneeHuawei Digital Power Technologies Co., Ltd.
InventorsLin Li, Zhipeng Wu, Yanzhong Zhang
Life of this patent
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Abstract
Embodiments of this application provide an energy storage system and a black start method. The energy storage system includes a black start controller, a battery module, a first converter, and a system control unit. The black start controller outputs a black start signal, the battery module generates an output voltage based on the black start signal, and the first converter supplies power to the system control unit based on the black start signal and the output voltage of the battery module, to enable the system control unit to implement black start of the energy storage system based on the black start signal.
Claims20
A system, comprising:
- a black start controller, configured to output a black start signal;
- a battery, wherein an input port of the battery is connected to an output port of the black start controller, and the battery is configured to generate an output voltage based on the black start signal;
- a first converter, wherein an input port of the first converter is connected to an output port of the battery and the output port of the black start controller, and the first converter is configured to supply, based on the black start signal and the output voltage of the battery, power to a system controller, wherein an input port of the system controller is connected to an output port of the first converter, to enable the system controller to implement black start of the system based on the black start signal;
- at least two power conversion systems;
- a load connected in parallel to the at least two power conversion systems;
- and
- a second converter, wherein an input port of the second converter is connected to the output port of the battery, and an output port of the second converter is connected to an input port of the at least two power conversion systems through at least one direct current bus;
- wherein the system controller is configured to separately send a power-on instruction to the second converter and the at least two power conversion systems;
- wherein the second converter is configured to establish a bus voltage based on the power-on instruction and the output voltage of the battery;
- wherein the at least two power conversion systems are configured to supply power to the load based on the respective power-on instructions and the bus voltage;
- wherein the at least two power conversion systems comprise a primary power conversion system and at least one secondary power conversion system;
- and
- wherein the primary power conversion system is configured to supply, in response to meeting a first preset condition, the power to the load based on the respective power-on instruction and the bus voltage;
- and
- wherein the at least one secondary power conversion system is configured to supply, in response to meeting a second preset condition, the power to the load based on the respective power-on instruction, the bus voltage, and an output voltage of the load.
A method, applied to a system comprising a black start controller, a battery, a first converter, a system controller, at least two power conversion systems, a load, and a second converter, the method comprising:
- outputting, by the black start controller, a black start signal;
- generating, by the battery, an output voltage based on the black start signal;
- supplying, by the first converter, power to the system controller based on the black start signal and the output voltage of the battery, to enable the system controller to implement black start of the system based on the black start signal;
- separately sending, by the system controller, a power-on instruction to the second converter and the at least two power conversion systems;
- establishing, by the second converter, a bus voltage based on the power-on instruction and the output voltage of the battery;
- and
- supplying, by the at least two power conversion systems, power to the load based on the respective power-on instructions and the bus voltage;
- wherein the at least two power conversion systems comprise a primary power conversion system and at least one secondary power conversion system, and supplying, by the at least two power conversion systems, power to the load based on the respective power-on instructions and the bus voltage comprises:
- supplying, by the primary power conversion system in response to meeting a first preset condition, the power to the load based on the respective power-on instruction and the bus voltage;
- and
- supplying, by the at least one secondary power conversion system in response to meeting a second preset condition, the power to the load based on the respective power-on instruction, the bus voltage, and an output voltage of the load.
Dependencies are inferred from the claim text.