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Parallel energy-storage battery state of charge balance control method and apparatus

A technology of energy storage battery and state of charge, applied in battery circuit devices, charge equalization circuits, circuit devices, etc., can solve problems such as SOC imbalance of parallel energy storage batteries, and achieve the effect of solving the imbalance

Inactive Publication Date: 2017-07-14
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

[0005] Aiming at the unbalanced problem existing in the SOC of parallel energy storage batteries mentioned above, the present invention proposes a balanced control method and device for the state of charge of energy storage batteries

Method used

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  • Parallel energy-storage battery state of charge balance control method and apparatus
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  • Parallel energy-storage battery state of charge balance control method and apparatus

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Embodiment Construction

[0062] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0063] A method and device for equalizing the state of charge of parallel energy storage batteries. The energy storage power station includes n parallel branches connected to the isolation transformer; the parallel branches include sequentially connected three-phase grid-connected contactors and inverters. and energy storage batteries.

[0064] like figure 1 The wiring diagram of the parallel energy storage battery system shown, T 1 ~T m Represents m parallel transformers, and each transformer is connected to i parallel energy storage batteries and inverters.

[0065] like figure 2 As shown, the balanced control method of the state of charge of the parallel energy storage battery includes the following steps:

[0066] Collect the SOC values ​​of each parallel energy storage battery in the energy storage power station, and ...

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Abstract

The invention relates to a parallel energy-storage battery state of charge balance control method and apparatus. The balance control method comprises the steps of collecting state of charge (SOC) values of each parallel energy-storage battery in an energy storage power station, and performing sorting on the SOC values based on a shell sort method; detecting whether the sorted SOC values are out of limit or not; and finally allocating charging-discharging power for the energy storage batteries according to a detection result. By virtue of the scheme, the imbalance problem existing the current parallel energy-storage battery SOC can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of energy storage, and in particular relates to a method and device for equalizing the state of charge of parallel energy storage batteries. Background technique [0002] In recent years, as the country vigorously advocates new energy power generation, my country's new energy power generation, especially photovoltaic and wind power generation, has developed rapidly. However, due to the volatility and intermittent nature of photovoltaic and wind power generation, their access also brings new problems, and energy storage is considered an effective solution. [0003] In Northwest China, Tibet and other areas rich in wind and solar resources, there are many large-scale photovoltaic power stations or wind farms, and their influence on the power system mainly includes: influence on active frequency characteristics, influence on reactive power and voltage characteristics, and influence on power angle stability The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/0016H02J7/0068
Inventor 张德隆李建林惠东靳文涛谢志佳田春光
Owner CHINA ELECTRIC POWER RES INST
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