Passive filter and active filter are two ahnative strategi- es to suppress harmonics in the electrical distribution system. Pas- sive filter is dc and efficient but it may cause the resonimce problem. Active film has become a mature tecblogy

直流电动机：PN=60KW , UN=220V , IN=308A , nN=1500r/min , 最大允许电流 Idbl=1.5IN , 三相全控整流装置：Ks=35 , 电枢回路总电阻 R=0.18Ω ， 电动势系数：Ce=0.196V.min/r 系统主电路：Tm=0.12s ，Tl=0.012s 滤波时间常数：Toi=0.0025s , Ton=0.015s, 其他参数：Unm*=8V , Uim*=8V , Ucm=8V σi≤5 , σn≤10