Distributed Secondary Control Strategies for Reactive Power Sharing and Voltage Restoration in Islanded Microgrids

	Distributed Secondary Control Strategies for Reactive Power Sharing and Voltage Restoration in Islanded Microgrids
	Wu LZ(吴丽珍)
刊名	International Journal of Innovative Computing, Information and Control
	2017-04-07
卷号	13 期号:2 页码:641-657
关键词	MATLAB Microgrids Reactive power
ISSN号	13494198
英文摘要	In a low-voltage microgrid system, the line impedances between power sources are resistive. The accuracy of reactive power sharing provided by droop controllers is affected by output impedances of the distributed generations (DCs) and line impedances. To improve the power sharing accuracy, a distributed secondary control approach is proposed in this paper. Based on the communication technology and hierarchical control theory, a novel distributed hierarchical control scheme is presented for the DSC of microgrids (MGs), which consists of primary control layer and secondary control layer. The primary control layer includes droop control, voltage and current control as well as virtual impedance control to achieve power sharing. In the secondary control, distributed consensus algorithm is applied to designing the observer so as to get global average values, restoring the voltage deviation and improving the accuracy of reactive power sharing; meanwhile the proposed approach reduces the high bandwidth requirements, and improves the reliability and flexibility of microgrids. Finally, the simulation and experimental platform are built based on Matlab/Simulink software and dSPACE103 device. Beal-time simulation and experimental results are presented in order to evaluate the feasibility and effectiveness by the proposed distributed secondary control (DSC). The results indicate that the distributed consensus algorithm is very robust with respect to communication impairments, such as packet delays and random packet losses. © 2017, ICIC International.
WOS研究方向	Computer Science
语种	英语
出版者	ICIC International
WOS记录号	WOS:000406146600019
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/103316]
专题	电气工程与信息工程学院
作者单位	兰州理工大学
推荐引用方式 GB/T 7714	Wu LZ. Distributed Secondary Control Strategies for Reactive Power Sharing and Voltage Restoration in Islanded Microgrids[J]. International Journal of Innovative Computing, Information and Control,2017,13(2):641-657.
APA	Wu LZ.(2017).Distributed Secondary Control Strategies for Reactive Power Sharing and Voltage Restoration in Islanded Microgrids.International Journal of Innovative Computing, Information and Control,13(2),641-657.
MLA	Wu LZ."Distributed Secondary Control Strategies for Reactive Power Sharing and Voltage Restoration in Islanded Microgrids".International Journal of Innovative Computing, Information and Control 13.2(2017):641-657.