直流对等式微电网混合储能系统协调控制策略

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摘要提出一种基于锂离子电池和超级电容混合储能的协调控制策略,使得混合储能系统（HESS）适用于风能、太阳能或者其他间歇式分布式电源供电的微电网。针对锂离子电池和超级电容的放电特性,提出DC-DC侧对等式并行双环控制策略,控制直流母线电压稳定的同时,利用控制环路自身带宽滤波特性及交流功率前馈达到功率分配效果;采用滞环PI控制方法,保证超级电容不会过放或者过充。DC-AC侧采用双同步坐标系下不平衡电流控制结构,有效跟踪不平衡参考电流。实验结果表明,所提出的协调控制策略能有效抑制直流母线电压冲击与波动,显著提高了系统动态响应;同时,超级电容利用效率得到提高,微电网在过渡状态下的性能也得到了改善。

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	孙建龙
	窦晓波
	张子仲
	全相军
	许泰峰
	徐沛

关键词 ：微电网, 混合储能, 锂电池, 超级电容, 功率控制, 变换器控制

Abstract：This paper presents the design and optimal control strategies for hybrid energy storage system (HESS) consisting of lithium-ion batteries (LB) and ultra-capacitors (UC). Thus HESS is suitable for microgrid powered by wind, solar and (or) other intermittent DERs. Herein, the fluctuations of the exchange power between the microgrid and the utility are hence suppressed and flattened when the microgrid operates in grid-connected mode, while the voltage and frequency keep stable when the microgrid operates in (during) island mode. The performance of the transient state of microgrid is improved. The simulation and experimental results based on the prototype verify the proposed design and strategies.

Key words： Microgrid hybrid energy storage system lithium-ion batteries ultra-capacitors power control converter control

出版日期: 2016-03-03

PACS:

TM60

作者简介: 孙建龙男,1963年生,博士研究生,主要研究方向为电网规划与运行控制。E-mail: sunjianlongnj@sina.com

引用本文:

孙建龙, 窦晓波, 张子仲, 全相军, 许泰峰, 徐沛. 直流对等式微电网混合储能系统协调控制策略[J]. 电工技术学报, 2016, 31(4): 194-202. Sun Jianlong, Dou Xiaobo, Zhang Zizhong, Quan Xiangjun, Xu Taifeng, Xu Pei. DC Peer-to-Peer Coordinated Control Strategy of Hybrid Energy Storage System for Microgrid. Transactions of China Electrotechnical Society, 2016, 31(4): 194-202.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2016/V31/I4/194

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