单滞环SVPWM电流跟踪控制策略的优化方法

Optimization of APF Single Hysteresis SVPWM Current Tracking Control Strategy

为提高有源电力滤波器的电流跟踪性能,针对传统的单滞环SVPWM电流跟踪算法的不足,提出了一种适用于并联型有源滤波器的双滞环SVPWM电流跟踪控制策略的优化方法。该方法通过对三相相间误差电流矢量的正负来判断空间电压矢量所在的区域,相对于传统的方法,避免了判断空间电压矢量所在区域的繁琐运算,同时也略去了三相电网电压检测环节,简化了电路设计;而且采用双滞环控制方法,有效地弥补了传统方法在误差电流较大时不能够快速跟踪电流的缺点。该方法运行效率高,且具有较高的鲁棒性。通过实验验证了该方法的优越性。

In order to improve the current tracking performance of active power filter and aiming at the shortage of traditional single hysteresis SVPWM current tracking algorithm,an optimization method of current tracking control strategy for double hysteresis SVPWM was proposed for shunt active power filter.In this method,the region of the voltage space vector was determined by the three-phase alternating positive and negative error current vector , compared to traditional methods,the tedious operation for determinning the region where the space voltage vector was avoided,while the three phase grid voltage detection part was omitted,the circuit design was simplified;The method has high operation efficiency,high robustness and superiority. It is confirmed experimentally.