A Novel Three-Phase Phase-Locked Loop Method Based on Internal Model of Repetitive Control
He Yu1, 2, Qi Hanhong2, Deng Chao1, Zhang Di2, Jin Weiguo1
1. Jiangsu Vocational College of Information Technology Wuxi 214153 China; 2. School of Electrical Engineering Yanshan University Qinhuangdao 066004 China
Abstract：As one of the key technologies of distributed grid-connected power generation system, grid synchronization technique is always the research hotspot. Usually numerous filters (or regulators) are needed for current phase-locked loop (PLL) algorithms to totally eliminate harmonic. Hence, a new phase-locked loop based on internal model of repetitive control is put forward. An extraction structure which can totally eliminate harmonic is designed. Wherein, the characteristic of the internal model that generates the resonant peak at grid fundamental frequency and every harmonic frequency is used, and the characteristic of multiple-complex coefficient-filter that can separate positive and negative sequence of grid fundamental wave is also taken into account. The grid frequency, phase and other related information can be extracted from the pure positive sequence by synchronous frame PLL. Finally, the proposed PLL is tested under distorted and unbalanced grid by Matlab/Simulink simulation and the related experiment. The results show the validity and superiority of this method.
何宇, 漆汉宏, 邓超, 张迪, 金卫国. 一种嵌入重复控制内模的三相锁相环的设计与实现[J]. 电工技术学报, 2016, 31(22): 83-91.
He Yu, Qi Hanhong, Deng Chao, Zhang Di, Jin Weiguo. A Novel Three-Phase Phase-Locked Loop Method Based on Internal Model of Repetitive Control. Transactions of China Electrotechnical Society, 2016, 31(22): 83-91.
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