基于dq变换的锁相环设计与仿真

Design and Simulation of Phase-locked Loop Based on dq Transform

针对一般锁相环在电网电压波动时存在锁相误差的问题,提出了一种基于dq变换的锁相环新方案,并对锁相环参数进行了整定。对于电网电压频率变化、相位变化以及谐波注入的影响,利用matlab进行了仿真分析。仿真结果表明,新方案有很好的跟踪效果,跟踪速度快,精度高,能较好实现相位锁定。

Aiming at the problem of phase-locked error in the voltage fluctuation of the general phaselocked loop,a new scheme of phase-locked loop based on dq transform is proposed,and the parameters of phase-locked loop are set.For the voltage frequency conversion,phase change and the effect of harmonic injection,the simulation analysis is carried out by using matlab.The simulation results show that,the proposed phase-locked loop has good tracking performance,fast tracking speed and high precision,and can realise phase locking.