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Inter-phase power differential control circuit and method for battery energy storage system

A technology of battery energy storage system and differentiated control, which can be applied in the fields of flexible AC transmission system, battery recycling, multi-phase network asymmetry reduction, etc., and can solve the problem of low overall utilization rate of decommissioned batteries

Active Publication Date: 2019-08-16
SHANGHAI JIAO TONG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the above-mentioned typical existing technologies often have high requirements on the consistency of the battery itself, which leads to a low overall utilization rate of decommissioned batteries

Method used

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  • Inter-phase power differential control circuit and method for battery energy storage system
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  • Inter-phase power differential control circuit and method for battery energy storage system

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Embodiment Construction

[0070] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0071] A phase-to-phase power differential control circuit of a battery energy storage system according to the present invention includes a three-phase sub-circuit, that is, the phase-to-phase power differential control circuit of the battery energy storage system includes an A-phase sub-circuit, a B-phase sub-circuit and C-phase sub-circuit; any sub-circuit or any sub-circuit in the A-phase sub-circuit, B-phase sub-circuit and C-phase sub-circuit includes a power module; the power module includes n casc...

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Abstract

The invention provides an inter-phase power differential control circuit and method for a battery energy storage system. The circuit part includes a phase-A sub-circuit, a phase-A sub-circuit and a phase-C sub-circuit. Any one or more sub-circuits among the phase-A sub-circuit, the phase-A sub-circuit and the phase-C sub-circuit include a power module and a battery pack. The power module includesn cascaded power sub-modules. The battery pack includes n battery modules. The power module can convert a set DC signal into an AC signal, and includes a power module DC side and a power module AC side. The power module DC side is electrically connected with the battery pack through a DC cable. The power module AC side is connected into a set high-voltage power grid. Decommissioned battery moduleswith poor consistency can be well integrated into the same energy storage system.

Description

technical field [0001] The present invention relates to the technical field of electrical automation equipment, in particular to an interphase power differential control circuit and method for a battery energy storage system, and in particular to an interphase power differential control strategy applied to a chain-type decommissioned power battery energy storage system . Background technique [0002] High battery cost is an important factor hindering the development and application of battery energy storage systems. In recent years, due to the dual pressure of the environmental crisis and the energy crisis, countries are vigorously developing clean and environmentally friendly electric vehicles. Therefore, a large number of vehicle power batteries will be decommissioned in the next few years, and the capacity of power batteries will be reduced to less than 80% of the original capacity. When it is used, it cannot meet the application needs of electric vehicles, and it still ...

Claims

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Application Information

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IPC IPC(8): H02J3/26H02J3/32H01M10/54
CPCH01M10/54H02J3/26H02J3/32Y02E40/10Y02E40/50Y02W30/84
Inventor 蔡旭刘畅
Owner SHANGHAI JIAO TONG UNIV
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