中文摘要：

工业中的电网谐波不但降低了电能的质量，还可能引起故障甚至事故，因此有必要对电网谐波进行有效地滤除；实际的工程实践中，无源滤波器常被用来滤除该谐波，而其滤波参数的确定是个关键；基于带精英策略的非支配排序遗传算法NsGA—Ⅱ，文中提出了一种新的无源滤波器的参数优化方法，克服了传统的凭个人经验选择滤波器参数的缺陷。利用NSGA—Ⅱ对无源滤波器进行参数优化，不仅能节省初始投资，还能更有效地消除谐波干扰；仿真结果证明了该方法的有效性。

英文摘要：

The harmonic interference in the industrial process can deteriorate the quality of electricity energy, and it may cause some faults, even accidents, so the elimination of the harmonic interference is a necessity. Practically, the passive filter is used to attain this goal, and its parameters are very important. Based on Non--dominated Sorting Genetic Algorithm with elitism approach （NSGA--Ⅱ）, the optimization of passive filter＇s parameters is presented. Conventionally, those parameters are chosen by personal experience, and can hardly reach the optimal point. With the parameters of passive filter optimized by NSGA--II, the minimum investment is obtained, and the harmonic interference is effectively eliminated, The simulation results show the effectiveness of NSGA--Ⅱ.