级联式储能系统中电池自均衡控制策略研究

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摘要针对独立电池供电的组合级联式储能系统中电池SOC不均衡问题,基于特征谐波消除PWM方法提出了一种新的差异化充放电控制策略。当检测到各电池SOC不均衡时,采用差异化充放电控制使各电池SOC趋于一致;当电池SOC达到均衡时,切换到同步充放电的移相SPWM控制。该方法提高了整个组合级联式储能系统的可用率和储能系统的有效容量,改善了储能系统的电能质量。文中推导了差异化充放电控制方法的原理,给出了切换条件。在PSCAD/EMTDC中建立了组合级联式储能系统模型,验证所提出的电池自均衡控制策略的有效性。

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	艾洪克
	吴俊勇
	郝亮亮
	冯宝泉
	张巨瑞
	张皎

关键词 ：组合级联式储能系统, 电池SOC自均衡, 移相SPWM控制, 特征谐波消除PWM

Abstract：In terms of the imbalance problems of the state of charge of batteries in independent battery powered hybrid cascade energy storage system, this paper proposes a new control strategy, the difference charge or discharge, which based on Selective Harmonic Elimination PWM .When the state of charge of batteries is imbalanced, carry on difference charge or discharge to adjust the state of charge of batteries convergence .If balanced ,transfer to the synchronous charge or discharge by using phase shift SPWM .As a result, it improves the whole hybrid cascade storage system availability and capacity and prolongs the batteries' service life even that of the whole system . This paper derives the principle of difference charge or discharge control method and puts forward the switching condition .Its reasonable and feasibility are verified by an example of hybrid cascade energy storage system, from theoretical analyses in conjunction with model investigations established in PSCAD/EMTDC.

Key words： Hybrid cascade energy storage system self-balancing control phase shift PWM selective harmonic elimination (SHE) PWM

收稿日期: 2014-08-10 出版日期: 2015-09-08

PACS:

TM72

基金资助:北京市科技计划课题资助项目（E13H00041）

作者简介: 艾洪克女,1989年生,硕士研究生,主要研究方向：电力系统分析与控制, 新能源发电和智能电网。吴俊勇男,1966年生,博士,教授,博士生导师,主要研究方向：电力系统分析与控制,新能源发电和智能电网,铁道电气化,电力信息化。

引用本文:

艾洪克,吴俊勇,郝亮亮,冯宝泉,张巨瑞,张皎. 级联式储能系统中电池自均衡控制策略研究[J]. 电工技术学报, 2015, 30(14): 442-449. Ai Hongke,Wu Junyong,Hao Liangliang,Feng Baoquan,Zhang Jirui,Zhang Jiao. Research on Battery Self-Balancing Control Strategy in Cascade Energy Storage System. Transactions of China Electrotechnical Society, 2015, 30(14): 442-449.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2015/V30/I14/442

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