注入无功功率的链式电池储能系统荷电状态均衡控制策略

陈舒钰; 刘文华; 赵香花; 马慧远; 于希娟

doi:10.7500/AEPS20190823004

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注入无功功率的链式电池储能系统荷电状态均衡控制策略

学术研究 | 更新时间：2025-06-16

- 注入无功功率的链式电池储能系统荷电状态均衡控制策略
- Balancing Control Strategy of State of Charge for Cascaded Battery Energy Storage System with Injection of Reactive Power
- 电力系统自动化-方正平台 2020年44卷第8期页码：83-91
- 作者机构：
  
  1.电力系统及发电设备控制和仿真国家重点实验室，清华大学，北京市 100084
  2.国网北京市电力公司，北京市 100031
- 作者简介：
  
  陈舒钰(1996—)，女，通信作者，硕士研究生，主要研究方向：柔性输配电技术和大功率电力电子技术。E-mail：shuyu_ch@163.com
  刘文华(1968—)，男，博士，教授，主要研究方向：柔性输配电技术和大功率电力电子技术。E-mail：liuwenh@mail.tsinghua.edu.cn
  赵香花(1981—)，女，博士，工程师，主要研究方向：柔性输配电技术和大功率电力电子技术。E-mail：zhaoxianghua@tsinghua.org.cn
- 基金信息：
  
  国家电网公司总部科技项目(5202011600UH)
- DOI：10.7500/AEPS20190823004
  中图分类号：
- 收稿日期：2019-08-23，
  
  修回日期：2019-12-11，
  
  网络出版日期：2020-03-18，
  
  纸质出版日期：2020-04-25
- 稿件说明：
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陈舒钰,刘文华,赵香花等.注入无功功率的链式电池储能系统荷电状态均衡控制策略[J].电力系统自动化,2020,44(8):83-91.

CHEN Shuyu,LIU Wenhua,ZHAO Xianghua,et al.Balancing Control Strategy of State of Charge for Cascaded Battery Energy Storage System with Injection of Reactive Power[J].Automation of Electric Power Systems,2020,44(8):83-91.
陈舒钰,刘文华,赵香花等.注入无功功率的链式电池储能系统荷电状态均衡控制策略[J].电力系统自动化,2020,44(8):83-91. DOI： 10.7500/AEPS20190823004.

CHEN Shuyu,LIU Wenhua,ZHAO Xianghua,et al.Balancing Control Strategy of State of Charge for Cascaded Battery Energy Storage System with Injection of Reactive Power[J].Automation of Electric Power Systems,2020,44(8):83-91. DOI： 10.7500/AEPS20190823004.

摘要

针对链式电池储能系统相内电池组荷电状态（SOC）不均衡问题，分析了单位功率因数下均衡控制策略在SOC极度不均衡时导致过调制的边界条件，并提出了一种注入无功功率的新型相内SOC均衡控制策略。通过在各H桥调制信号中叠加有功和无功电压分量，重新分配有功和无功功率，保证SOC处于极端状态的电池组主要进行有功功率交换，其余电池组主要进行无功功率交换，实现极端模块调制比有效降低，非极端模块调制比略有增长，避免过调制。与单位功率因数均衡控制策略相比，该策略通过控制功率因数角充分协调各模块调制比，可以在各电池组SOC差异更大的情况下实现均衡控制，扩大适用范围。仿真结果验证了所提策略的正确性和有效性。

Abstract

To address the issue of state of charge (SOC) unbalance in cascaded battery energy storage system

this paper analyzes the boundary conditions of over-modulation with unity power factor for balancing control strategy when SOC is extremely unbalanced

and proposes a novel balancing control strategy of SOC in phase with injection of reactive power. By superimposing the active and reactive voltage components to each H-bridge modulation signal and redistributing active power and reactive power

this strategy can ensure that the batteries with extreme SOC mainly exchange active power

while other batteries mainly exchange reactive power. Therefore

it can effectively reduce the modulation ratio of the batteries with extreme SOC

while slightly increase the modulation ratio of other batteries

and avoid over-modulation. Compared with the balancing control strategy with unity power factor

this strategy can fully coordinate the modulation ratio of each module by controlling the power factor angle and expand application scope of balancing control with bigger difference between SOC of each battery. The simulation results verify the correctness and effectiveness of the proposed control strategy.

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references

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