Results show that the proposed PLL follows quickly system frequency change and the three-phase voltage PWM rectifier based on it realizes the operation of unity-power factor .

三相电压型PWM整流系统可实现 单位功率 因数运行 ；在三相电网电压频率出现 小 范围 漂移情况 下， 新型锁相环也能够准确锁相。