Unified Digital Phase-Locked Loop With Multiple Complex Resonators for Both Single- and Three-Phase Grid Synchronization
Unified Digital Phase-Locked Loop With Multiple Complex Resonators for Both Single- and Three-Phase Grid Synchronization
复制标题
具有多个复杂谐振器的统一数字锁相环，用于单相和三相电网同步
DOI：
10.1109/access.2017.2767087
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发表时间：
2017-10
期刊：
影响因子：
3.9
通讯作者：
尤鋆
中科院分区：
文献类型：
--
作者：
刘康礼;曹武;赵剑锋;尤鋆
Grid synchronization is one of the critical techniques used in grid-connected systems, such as distributed generation, energy storage, and harmonic compensation equipment. To acquire efficient grid-connection or harmonic compensation performance, the accurate and real-time information of phase, frequency and amplitude is required, especially when the grid voltage contains disturbed or other unexpected components. According to different application fields, two kinds of phase-locking structures exist—single- and three-phase phase-locked loop (PLL), which are not cross compatible. In this paper, a novel unified digital PLL with multiple complex resonators for both single- and three-phase systems is proposed. First, single-phase and three-phase voltage signal is transformed uniformly to a similar complex form that consists of positive and negative sequence components rotating in counterclockwise and clockwise directions, respectively. Then, synchronous rotating frame PLL with a generalized prefilter is introduced. The proposed filtering structure consists of multiple complex resonators that can filter out harmonic frequency components and maintain fundamental positive sequence components accurately. Furthermore, a simplified structure of the complex resonator for single-phase system and an operation method for resonant factor are introduced. Finally, the validity and effectiveness of the proposed method are proven by the simulated and experimental results of a three-phase four-leg shunt active power filter.
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影响因子：
6.7
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通讯作者：
S. Golestan;M. Monfared;F. Freijedo
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影响因子：
7.7
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Masoud Karimi-Ghartemani;M. Mojiri;A. Safaee;J. Walseth;S. A. Khajehoddin;Praveen Jain;Alireza Bakhshai
影响因子：
7.7
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通讯作者：
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影响因子：
7.7
作者：
Weiwei Li;X. Ruan;Chenlei Bao;Donghua Pan;Xuehua Wang
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