有源电力滤波器新型控制策略

基于瞬时无功功率理论和预测控制算法，提出了一种新型有源电力滤波器控制方法，该方法消除了电源电流在负载电流发生突变处产生的锯齿抖动。实时检测负载电流的二阶导数，判断负载电流是否发生突变。发生突变则采用预测控制程序模块进行补偿电流控制。这种方法可以应用在单相、三相电力系统的滤波电路中。仿真结果证明了这种算法的有效性。

A New Control Method for Active Power Filter

Based on both instantaneous reactive power theory and predictive control Algorithm, a new control method for active power filter is presented and the source current spikes that occur due to sudden changes in load current are eliminated. This method measures the second derivative of the load current in real time to judge if there is a sudden change in the load current. If there is, the program module of predictive control Algorithm will be put into operation to control the harmonic current compensation. The method can be applied in filter circuits of single-phase and three-phase power systems and the results of simulation demonstrate validity of the proposed method.