可再生能源2017，Vol.35Issue(5)：714-720,7.
优化型DDSRF-PLL在不平衡和畸变电网电压下的仿真研究
Simulation studies of optimized DDSRF-PLL under unbalanced and distorted grid voltage
摘要
Abstract
Single synchronous reference frame for phase locked loop (SSRF-SPLL) only applied to the lock-phase of grid voltage in ideal conditions,and decouple double synchronous reference frame PLL (DDSRF-PLL) could realize the lock-phase of three-phase unbalanced grid.The frequency signal extracted through DDSRF-PLL still existed larger fluctuations and distortions when there were multiple harmonics in grid voltage,which made phase locked effect non-ideal.By introducing the SOGI-QSG module to filter,this paper proposes an optimized phase locked loop based on DDSRF SPLL.It can eliminate the impact on the phase locked loop and track the grid voltage quickly and accurately when the multiple harmonic in grid voltage are eliminated through SOGI-QSG before decoupling the positive and negative sequence voltage.Simulation and analysis is carried out in Matlab/Simulink,which shows that the frequency and phase of fundamental voltage can be locked effectively when the grid voltage is unbalanced and mixed with multiple harmonics.关键词
三相不对称/多次谐波/锁相环/双同步坐标系Key words
three-phase voltage imbalance/multiple harmonics/phase locked loop/double synchronous coordinate system分类
能源科技引用本文复制引用
高文森,樊艳芳,王一波..优化型DDSRF-PLL在不平衡和畸变电网电压下的仿真研究[J].可再生能源,2017,35(5):714-720,7.基金项目
新疆维吾尔自治区自然科学基金项目(2016D01C034). （2016D01C034）
