电力系统保护与控制Issue(10)：114-118,5.
基于双dq坐标变换的三相电压锁相环的研究
Study of three-phase voltage phase locked loop based on double dq transformation synchronous reference frame
摘要
Abstract
This paper proposes a kind of method of three-phase voltage phase locked loop under three-phase unbalanced voltage. When the positive dq synchronous reference frame transforms, the dq axis voltage component will contain AC component caused by negative sequence voltage component which leads to the error of the three-phase voltage phase locked loop (PLL) based on the dq synchronous reference frame transformation. After the dq axis DC voltage component extracted from negative sequence dq synchronous reference frame transformation compensates positive sequence dq transformation synchronous reference frame q axis voltage component, the positive sequence voltage phase can be locked accurately and quickly. By the way of the negative sequence dq synchronous reference frame d axis and q axis DC voltage component detecting negative sequence voltage initial phase angle, the negative sequence voltage phase can be locked. The simulation results show that, this method can achieve the purpose that three-phase power supply frequency, positive sequence voltage phase and the negative sequence voltage phase can be fast and accurately locked in case of unbalanced three-phase voltage.关键词
双dq坐标变换/三相电压不对称/锁相环Key words
double dq synchronous reference frame transformation/three-phase voltage unbalanced/phase locked loop分类
信息技术与安全科学引用本文复制引用
辛业春,李国庆,王尧,王振浩..基于双dq坐标变换的三相电压锁相环的研究[J].电力系统保护与控制,2014,(10):114-118,5.基金项目
教育部长江学者和创新团队发展计划资助项目(IRT1114) （IRT1114）
This work is supported by Program for Changjiang Scholars and Innovative Research Team (PCSIRT)(No. IRT1114) （PCSIRT）
