功率平滑用电池储能系统的功率响应特性研究

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摘要电池储能系统(BESS)的功率响应速度问题,一直存在一定的争议.有学者认为BESS的响应速度很快,主要取决于变流器的响应时间;也有学者认为BESS的响应速度偏慢,主要取决于蓄电池自身的响应时间,在需要快速响应的应用场合其调节效果较差.针对这个问题,本文通过研究蓄电池自身的运行特性,结合变流器的功率调节范围,研究了BESS的功率响应特性.理论及仿真分析表明,BESS仅在大功率输出时,显示出功率响应无法快速跟随需求的现象,其根本原因在于大电流输出时蓄电池端电压快速下降,限制了蓄电池本身及变流器输出功率的能力.增加蓄电池组容量,减小蓄电池内阻以及提高电池本身的电压维持能力,通过优化蓄电池组的成组方式提高蓄电池组的标称电压等,可有助于提高BESS提供大功率的能力,改善BESS的功率响应特性.

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	郭芳
	邓长虹
	廖毅
	谭茂强

关键词 ： BESS, 分布式电源, 功率平滑, 响应特性

Abstract：The power response speed of battery energy storage system (BESS) there has been some controversy. Some scholars think that the response time of BESS mainly depends on the converter. The response is quickly. But some scholars think that the response time of BESS mainly depends on the battery itself. The response is slow. Aiming at this problem, BESS power response characteristics are studied in this article through studying the operation characteristic f the battery itself and the converter power regulation scope. Theory and simulation analysis show that the power response may cannot follow the demand quickly only when the output power of BESS is high. This is because the terminal voltage of battery will falling fast when the output current is high. This limits the battery and inverter output power ability. Increase the battery capacity, reduce the battery internal resistance and increase the voltage maintain ability of the battery, improvement of the nominal voltage of the battery through optimization the group way, etc., can improve the power response characteristics of BESS, and increase the ability of provide high power.

Key words： BESS distributed power power smoothing response characteristics

收稿日期: 2014-09-10 出版日期: 2015-09-14

PACS:

TM64

作者简介: 郭芳女,1983年生,博士,研究方向为微电网,储能技术等.邓长虹女,1963年生,博士,教授,博士生导师,研究方向为大电网安全稳定分析及控制,新能源接入及电网智能控制,优化控制理论及电网规划等.

引用本文:

郭芳,邓长虹,廖毅,谭茂强. 功率平滑用电池储能系统的功率响应特性研究[J]. 电工技术学报, 2015, 30(12): 434-440. Guo Fang,Deng Chang-hong,Liao Yi,Tan Mao-qiang. Research on the Response Characteristics of BESS Used in Power Smoothing. Transactions of China Electrotechnical Society, 2015, 30(12): 434-440.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2015/V30/I12/434

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