A battery/supercapacitor hybrid energy storage system for DC microgrids

2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia) Pub Date : 2016-05-22 DOI:10.1109/IPEMC.2016.7512558

S. Adhikari, Z. Lei, Wang Peng, Yi Tang

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引用次数: 24

Abstract

This paper explores the frequency coordinating virtual impedance concept and proposes a control strategy for the co-ordination control of a hybrid energy storage system in DC microgrids. It investigates power decoupling methods to better attenuate the ripple power by filtration. Lead-acid battery and supercapacitor are used to form a hybrid energy storage system and are connected to a common DC grid through bi-directional DC-DC converters. Battery converter can absorb low frequency power variations while the high frequency power variations can be absorbed by supercapacitor converter. Battery supplies the long term power demand and supercapacitor responds to the short term power fluctuations during transient process in this proposed method. For the reduction of ripple power in the battery, this paper discusses the insertion of high order low/high pass filters for battery and supercapacitor converters instead of lower order low/high pass filters. The effectiveness of the proposed concept is shown through simulation and experimental results.

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用于直流微电网的电池/超级电容器混合储能系统

探讨了频率协调虚拟阻抗的概念，提出了直流微电网混合储能系统协调控制的控制策略。研究了功率去耦方法，通过滤波更好地衰减纹波功率。采用铅酸蓄电池和超级电容器组成混合储能系统，通过双向DC-DC变换器与普通直流电网连接。电池变换器可以吸收低频功率变化，而超级电容器变换器可以吸收高频功率变化。在暂态过程中，电池提供长期的电力需求，超级电容器响应短期的电力波动。为了降低电池的纹波功率，本文讨论了在电池和超级电容器变换器中插入高阶低/高通滤波器来代替低阶低/高通滤波器。仿真和实验结果表明了该方法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)

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