有源电力滤波器选择性谐波补偿方法

Selective Harmonic Compensation Method for Active Power Filter

为了实现选择性谐波补偿,提出一种基于滞环空间矢量脉宽调制SVPWM(space vector pulse width modulation)策略的有源电力滤波器APF(active power filter)选择性谐波补偿方法。在检测算法中加入补偿角,以补偿系统的延时;控制算法采用滞环空间矢量脉宽调制策略,使有源电力滤波器输出的补偿电流能够准确跟踪参考电流,从而达到选择性谐波补偿的目的。该方法不需要设计复杂的电流控制器,计算量小;而且不必计算参考电压值以及阻抗参数等,避免了参数误差的影响。文中最后通过样机实验证明了该方法的正确性和有效性。

A new method of selective harmonic compensation active power fiher（APF）based on hysteresis space vector pulse width modulation （SVPWM）strategy is proposed. Firstly, it reduces the system delay by the phase compensation in selective harmonic detection, and the current errors will be limited in the allowed range by the hysteresis eomparators. Hence the selected harmonic will be compensated by active power filter. The voltage reference vector and the val- ues of parameters are not required to be calculated accurately, so the affect due to parameter calculation error can be overcome. The experimental results illustrate the validity of the proposed method.