A magnitude-phase detection method for grid-connected voltage of wind power generation system

	A magnitude-phase detection method for grid-connected voltage of wind power generation system
	Zhang, Xiaoying 2; Cheng, Zhizhuang 2; Wang, Xiaolan 2; Wen, Zhiwei 1
	2012
会议日期	June 24, 2012 - June 26, 2012
会议地点	Wuhan, China
关键词	Current voltage characteristics Dynamic response Electric power generation Electric power transmission networks Signal detection Wind power decouple Grid-connected operation Negative sequence components Phase detection Positive-sequence components PQR transformation Software phase locked loops Wind power generation systems
页码	926-932
英文摘要	In order to keep low-voltage ride-through under the grid faults for wind power generation system, the magnitude and phase information of the system grid-connected voltage must be detected fleetly and precisely so that the control subsystem of wind power generation system can tackle the faults. The conventional three-phase software phase-locked loop (SPLL) has a low speed of dynamic response because of the effects of negative-sequence and harmonic components. Also it can not exactly extract the fundamental positive-sequence magnitude and phase of three-phase voltage. This paper proposes a novel three-phase magnitude-phase detection method based on PQR transformation. The proposed method can decouple the fundamental positive-sequence component and negative-sequence component of three-phase voltage, and detect the magnitudes and phases of them respectively. The simulation results verify that the proposed method can overcome the shortcomings of conventional three-phase SPLL, track the magnitude and phase information of the fundamental positive-sequence voltage accurately and improve the speed of dynamic response effectively under the bad harmonic condition. The novel magnitude-phase detection method can be used to detect exactly the grid-connected voltage of wind power generation system. © 2012 Huazhong Univ of Sci & Tec.
会议录	Proceedings of 2012 International Conference on Modelling, Identification and Control, ICMIC 2012
会议录出版者	IEEE Computer Society
语种	英语
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/116116]
专题	电气工程与信息工程学院
作者单位	1.Gansu Electric Power Research Institute, Lanzhou 730050, China 2.School of Electrical and Information Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
推荐引用方式 GB/T 7714	Zhang, Xiaoying,Cheng, Zhizhuang,Wang, Xiaolan,et al. A magnitude-phase detection method for grid-connected voltage of wind power generation system[C]. 见:. Wuhan, China. June 24, 2012 - June 26, 2012.