新型软件锁相环的三相电压型PWM整流器的控制

Three-phase Voltage PWM Rectifier Control of Novel Soft Phase Locked Loop

在电网电压频率波动或者三相不平衡的情况下,硬件锁相很难检测到基波正序的相位。文中在结合PWM整流器空间矢量解耦控制算法的基础上,将软件锁相环技术应用在PWM整流器控制算法中,并用仿真和实验验证了该方案的可行性。实验结果表明,该算法解决电网电压频率波动及三相不平衡时相位同步等问题,并在工程上具有一定参考价值。

It is difficult to detect the phase of positive sequence fundamental component of voltage, under power network frequency variations and three-phase unbalance. This paper is base on SVPWM rectifier decoupled control, a novel soft phase locked loop is used in PWM rectifier algorithm, the simulations and experimental result proves the scheme is feasible, The experimental result indicated that this algorithm when the solution power network frequency variations and three-phase unbalance questions and so on.it has certain reference va（ue in the project.