直流微网中复合储能装置的并联技术研究

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Abstract With more and more implementation of renewable energy sources within power systems,energy storage technologies will be ever more important for improving system stability and power quality.Compared with the single energy storage system,hybrid energy storage system has more advantages in view of characteristics about present storage elements.However,present hybrid energy storage technologies are mainly based on master-slave control strategy which needs high bandwidth communication.Consequently,its reliability is reduced and that kind of control is not suitable to distributed DC microgrid.Considering the expansion and redundancy of same type storage units,this paper presents a novel parallel control strategy for hybrid energy storage units.In this control system,batteries use U-I droop control and supercapacitors use U′-I droop control.By using local information about storage units alone,the system can compensate different frequency components with different type storage units and share power among same type.Finally,the simulation and experimental results are presented to verify its correctness and effectiveness.

Key words： Hybrid energy storage system droop control parallel control DC microgrid

Received: 20 August 2016 Published: 23 March 2017

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TM727

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	Articles by authors
	Chen Meifu
	Zhao Xin
	Jin Xinmin
	Liu Jingdou
	Wu Xuezhi

Cite this article:

Chen Meifu,Zhao Xin,Jin Xinmin等. Research on Parallel Control Strategy of Hybrid Energy Storage Units in DC Microgrid[J]. Transactions of China Electrotechnical Society, 2016, 31(增刊2): 142-149.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I增刊2/142

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