注入式混合型有源滤波器的复合型滞环控制方法研究

以注入式混合型有源滤波器为例,通过对其建立数学模型,结合传统滞环控制算法响应速度快和双谐振积分控制算法无稳态误差的优点,提出了一种复合型滞环控制作为注入式混合型有源滤波器的电流跟踪控制算法。引入双谐振积分控制算法,作为一种等效控制来改变滞环控制的控制律。通过环宽的设置,决定了等效控制的投入条件,使得系统在电流跟踪误差较大时滞环控制占主导,误差减小速度较快,在误差减小到一定范围内时双谐振积分控制占主导,实现稳态无差。从跟踪速度、控制精度和高频毛刺含量3方面对新的复合型滞环控制算法与传统滞环控制算法以及单一的双谐振积分控制算法进行仿真比较,结果证明,所提方法动态、稳态性能好,易于抑制逆变器高频开关毛刺。

Synthesized hysteretic control of injection- type hybrid APF

Taking the injection-type hybrid APF (Active Power Filter) as an example,a synthesized hysteretic control method for current tracking is proposed by establishing its mathematical model,which combines the fast hysteretic control with the zero-static-error double harmonic integrator control. The double harmonic integrator is used as an equivalent control to improve the control rules of traditional hysteretic control. When current tracking error is bigger,the hysteretic control prevails to quickly decrease it. When the error is reduced to a certain range,the double harmonic integrator control prevails to eliminate the static error. The synthesized hysteretic control,traditional hysteretic control and double harmonic integrator control are simulated and the simulative results are compared in tracking speed,control precision and high frequency burr amount,which shows the proposed control has perfect dynamic and static performance with less high frequency burrs.