有源电力滤波器锁相倍频电路的参数优化

Active Power Filter Phase-locked Frequency Circuit Parameters Optimization

通过对锁相倍频电路的研究,针对锁相环电路参数不易确定的特点,运用自动控制原理相关理论,分析了锁相倍频电路的原理及稳定性、环路滤波器的衰减特性,并建立了环路数学模型。提出一种锁相环电路参数的优化方法,实验结果表明,运用该方法设计的锁相倍频电路能够准确稳定地倍频出所需要的触发信号,较好地实现了同步采样、等间隔采样,以及整周期电压的均匀细分,同时降低了设计难度,具有很强工程适用性。

By studying the PLL circuit,because the phase-locked loop circuit parameters are not easy to determine,using automatic control principles,the principle of the PLL multiplier circuit and stability,loop filter＇s attenuation characteristics are analyzed and a mathematical model of the loop is established.The optimization method for PLL cir-cuit parameter is proposed.The experimental results show that the method can be applied into the PLL multiplier cir-cuit for the stable and accurate trigger signal.It can supply for the better synchronous sampling and interval sam-pling,achieving the uniform subdivision of the whole periodic voltage.Meanwhile,it reduces the design difficulties,with strong engineering applicability.