电测与仪表2017，Vol.54Issue(8)：14-20,7.
基于解耦双同步坐标变换的三相锁相环研究
Study on PLL based on decoupled double synchronous reference frame
唐轶 1谢永强 1王扬 1刘全景 1朱玉振1
作者信息
摘要
Abstract
This paper proposes a method of three-phase voltage and frequency locked loop under distorted voltage conditions like voltage dip, frequency mutation, phase mutation, harmonics injected.After positive(negative) dq synchronous coordinate transformation, the dq axis voltage component contains AC component whose frequency is 2ω, which is caused by negative (positive) voltage component.After the dq axis DC voltage component is extracted from negative (positive) sequence dq synchronous reference frame transformation which compensates the 2ω AC component under the positive (negative) sequence dq transformation synchronous reference frame, and the negative-positive decoupling model is built.Meanwhile, the high-frequency harmonics are filtered by designing low-pass filter reasonably, so that positive-sequence fundamental component can be extracted from three-phase unbalanced voltage.The simulation result shows that, this method can make it that the frequency and phase of positive-sequence fundamental voltage can be locked faster and more accurately.关键词
不平衡电压/基波正序电压/解耦双同步坐标变换/滤波/三相同步锁相环Key words
unbalanced voltage/fundamental positive-sequence voltage/decoupled double synchronous coordinate transformation/filtering/SRF-PLL分类
信息技术与安全科学引用本文复制引用
唐轶,谢永强,王扬,刘全景,朱玉振..基于解耦双同步坐标变换的三相锁相环研究[J].电测与仪表,2017,54(8):14-20,7.
