三相四线制并联型电力有源滤波器的算法和参数仿真

针对三相四线制并联型电力有源滤波器的谐波电流检测问题,论证了基于瞬时无功理论的i_p-i_q算法无需改进也可直接应用到三相四线制系统里,给出了推导过程.阐明了基于该方法的滤波原理;给出了主控电路结构;分析了电力有源滤波器主要参数对其整体性能的影响,确定各参数值,并搭建了仿真模型;利用Matlab/SIMULINK对该模型进行了软件仿真分析.仿真结果表明:该有源滤波器对三相四线制系统中不平衡非线性负载产生的谐波具有良好的补偿特性,并且平衡三相负载.

Simulation of algorithm and parameters for shunt active power filter in three-phase and four-wire system

In order to solve the harmonic current detection problem of shunt active power filter( APF) in three-phase and four-wire system,the i_p-i_q algorithm based on the instantaneous reactive theory was demonstrated. It could be directly applied to three-phase and four-wire system without being improved,and the derivation process was given. The principle of filtering and the main circuit of this system were introduced. Also,several key parameters which affect performance of the APF were discussed,and parameter values were chosen. Then a simulating model was built,and software simulation analysis for this model was carried out by means of Matlab/SIMULINK. The simulation results show that this active power filter has a good compensation characteristic for the harmonic produced by the unbalance nonlinear loads and balances three-phase loads in three-phase and four-wire system.