电力系统及其自动化学报2019，Vol.31Issue(3)：76-82,7.DOI:10.19635/j.cnki.csu-epsa.000164
基于新型三相锁频环的锁相技术
Phase-locked Technology Based on Novel Three-phase Frequency-locked Loop
摘要
Abstract
Phase-locked technology is one of the basic technical requirements for the grid-connected operation of a dis?tributed generation system. When there is a step change in voltage frequency,the traditional phase-locked loop(PLL) cannot precisely lock the voltage phase. To solve this problem,a novel three-phase frequency-locked loop(FLL)is put forward in this paper. First,the principle of steady-state error generated in frequency estimation due to the non-ideal dif?ferential operation is introduced. Then,three kinds of error sources that may exist under non-ideal grid conditions are analyzed in detail,and the corresponding solutions are proposed. At last,the working principle and parametric design method for the novel FLL are analyzed systematically;in addition,the corresponding simulation model is established in Matlab/Simulink,and it is experimentally compared with the three-phase synchronous reference frame phase-locked loop(SRF-PLL)method based on the synchronous coordinate transformation of dq. Simulation results prove that the novel three-phase FLL has fast dynamic response,and it also has better phase-locked performance than the traditional PLL when there is a step change in frequency,which is of practical values.关键词
分布式发电/锁相技术/锁相环/锁频环/频率突变Key words
distributed generation/phase-locked technology/phase-locked loop(PLL)/frequency-locked loop(FLL)/step change of frequency分类
信息技术与安全科学引用本文复制引用
邹兵勇,李华,利雅琳,刘俊峰..基于新型三相锁频环的锁相技术[J].电力系统及其自动化学报,2019,31(3):76-82,7.基金项目
江西省电力有限公司科技资助项目(52182015000P) （52182015000P）
