电气传动2016，Vol.46Issue(10)：65-67,3.DOI:10.19457/j.1001-2095.20161014
延时消去滤波SRF-PLL方法
SRF-PLL with Delayed Signal Cancellation
摘要
Abstract
Grid connected power converter requires precise detection of the grid voltage phase angle for synchronization in real time. Synchronous reference frame phase-locked loop(SRF-PLL)used Park transform as phase detector(PD). As three-phase grid voltages were unbalanced,the PD output contained disturbances oscillating at double fundamental frequency,which leaded phase error inaccurate. Analyzed the filtering characteristics of Delayed Signal Cancellation(DSC)and it′s application in-loop within SRF-PLL attenuated the particular frequency component. As a result,the DSC-SRF-PLL could track the fundamental frequency positive sequence. The simulation carried out by Matlab/Simulink shows that this method has feature of high steady precision,fast response and small computation burden. The algorithm has been implemented and tested in a float-point DSP TMS320LF28335 to verify the correctness and effectiveness.关键词
锁相环/不平衡电压/延时消去滤波/数字信号处理器Key words
phase-locked loop/unbalanced voltage/delayed signal cancellation/digital signal processor分类
信息技术与安全科学引用本文复制引用
谢门喜,朱灿焰,杨勇..延时消去滤波SRF-PLL方法[J].电气传动,2016,46(10):65-67,3.基金项目
国家自然科学青年基金项目 （）
