Study on improved droop control strategy of MMC-MTDC system based on novel sliding mode control

doi:10.1016/j.egyr.2021.09.138

	Study on improved droop control strategy of MMC-MTDC system based on novel sliding mode control
	Zhang, Mingguang 2; Wang, Wenting 2; Ding, Jingjing 1
刊名	ENERGY REPORTS
	2021-11-01
卷号	7 页码:1258-1269
关键词	MMC-MTDC PI control The novel exponential approach law Sliding mode control Improved droop control
ISSN号	2352-4847
DOI	10.1016/j.egyr.2021.09.138
英文摘要	In view of the strong coupling, nonlinearity and uncertainty of HVDC system, and the poor consistency when the MMC control policy adopts the traditional PI double closed-loop control, an improved droop control policy with the novel sliding pattern controlling is given herein. The controller brings to the dual closed loop control structure, the internal loop takes current error in the dq axis as the sliding mode surface. A sliding mode controller with the novel exponential approach law is designed, which improves the convergence speed of the traditional exponential approach law and eliminates the chattering phenomena. Then the consistency of the system is identified by Lyapunov method. The outer-loop adopts a modified sag control policy. After comparing with the voltage reference value, the droop factor is proposed. Finally, an emulation model including MMC-MTDC with four terminal is constructed on the PSCAD/EMTDC, which is emulated and validated under stable and transient conditions. The consequences reveal that the given control policy not only has a good convergence effect, but also improves the kinematic respond speed. It can also reduce the direct current voltage deviation, and enhances the stability and reliability of the system. (C) 2021 The Author(s). Published by Elsevier Ltd.
WOS研究方向	Energy & Fuels
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000756699200117
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/154991]
专题	电气工程与信息工程学院
作者单位	1.Lanzhou Wanli Aviat Electromech Co Ltd, Lanzhou 730070, Peoples R China 2.Lanzhou Univ Technol, Sch Elect & Informat Engn, Lanzhou 730050, Peoples R China;
推荐引用方式 GB/T 7714	Zhang, Mingguang,Wang, Wenting,Ding, Jingjing. Study on improved droop control strategy of MMC-MTDC system based on novel sliding mode control[J]. ENERGY REPORTS,2021,7:1258-1269.
APA	Zhang, Mingguang,Wang, Wenting,&Ding, Jingjing.(2021).Study on improved droop control strategy of MMC-MTDC system based on novel sliding mode control.ENERGY REPORTS,7,1258-1269.
MLA	Zhang, Mingguang,et al."Study on improved droop control strategy of MMC-MTDC system based on novel sliding mode control".ENERGY REPORTS 7(2021):1258-1269.