城市轨道交通系统混合滤波器的设计及仿真

Design and Simulation of Hybrid Filter in Urban Mass Transit System

城市轨道交通牵引供电系统通过整流机组把交流电流转变成相对稳定的直流电流,供给电动车和车载设备用电,所产生的谐波给电力系统的安全经济运行造成危害.针对城市轨道交通系统谐波的特征,运用自适应谐波检测方法对谐波检测分离进行仿真,并选择合适的参数,使系统达到最优结果.通过有源滤波器和无源滤波器的有效配合对谐波抑制进行仿真,结果表明该方法可使谐波含量大大降低,达到改善功率因数,优化电网电能质量的目的.

Urban mass transit system, conform alternating current（AC） to direct current（DC） through rectifiers, supply power to motor and vehiclel equipments, whose harmonics do harm to the safe and economic works of power system. In view of the characteristics of harmonic of urban mass transit system, simulation on adaptive neural network to detect and isolate the harmonics shows the results can be optimal with the moderate parameters. Simulation on the hybrid filter＇ s effective cooperation of active filter and passive filter shows this method can suppress the harmonics, improve and optimize power factor.