有源电力滤波器在电铁谐波抑制中的应用与仿真

Application and simulation of active power filter on restraining the electrified railway system harmonic current

对应用于补偿电铁谐波的有源电力滤波器的性能进行了分析,并讨论了其工作原理。采用基于鉴相原理的检测法检测出待补偿电流的指令值,并利用单周控制的双向互补控制策略,使逆变器产生出补偿电流,来抵消电铁谐波源对电力系统带来的不利影响。同时在MATLAB/SIMULINK的仿真软件下,建立了电铁牵引供电系统,利用有源电力滤波器进行谐波抑制的仿真,仿真结果验证了该方案的正确性和可行性。

The performance of active power filter is presented and the operation principle for restraining the electrified railway system harmonic current is also discussed. In the APF, the trigger current is detected by means of the phase discriminating detecting method, and on the basis of the trigger current, the compensation current is obtainged from the inverter under one--cycle control of double-direction compensaling strategy to offset the harmonic current bringing bad influence to electric system. The simulation of electrical railway system model is presented with MATLAB/SIMULINK using active power filter, and the simulation results show that the method is effective and feasible.