在含有非線性負載的工業用戶系統中，常使用被動式濾波器來改善諧波污染問題，但因濾波器間或與系統阻抗間會產生併聯共振點，常常導致諧波放大問題而損害設備。因此本文提出完整的諧波計算與模擬方法，將各種可能引起系統阻抗變化的狀況皆考慮，以瞭解系統諧波潮流、電壓失真及變壓器、電容器與濾波器等元件受諧波迫害的程度，希望能預先檢視潛在的諧波問題，使用戶更安心的使用諧波負載及濾波器。除此之外，為使被動濾波器的設計有更完整的理論依據，本文詳述單通濾波器與阻尼濾波器各參數與濾波特性的關係，尤其針對二階式阻尼濾波 器，提出實際設計上的應用，最後，本文將濾波器的保護方法納入濾波器設計的範圍內，並利用EMTP程式模擬濾波器投入時的暫態現象，使 整個設計過程更完備。本文並將研究結果應用在兩個濾波器設計實例 上，一是化工廠，另一則是鋼鐵廠，此兩種工業用戶分別使用整流器及電弧爐等兩種不同特性的非線性負載。經由模擬結果顯示，文中所提濾波器設計技術與保護方法，能有效地改善併聯共振諧波放大問題，並降低諧波污染，提高電力品質。

It is well known that the passive filters can be used to improve the harmonic pollution problems in the industrial systems which contain non-linear loads. However, some parallel resonant points could be produced by the filters and the system impedance. If some frequencies of harmonic currents are near the parallel resonant frequencies, the harmonic current amplification problems will take place. This could damage some equipment. Thus, a complete passive filter design scheme that considers the variation of system impedance is proposed in this thesis. The harmonic flows, voltage distortions, and effect on each component (transformers, capacitor banks, filters) will be obtained by this program. If the potential problems of harmonics are examined in advance, the customers will easily use harmonic loads and filters. Besides, this thesis also describes the relationships between the filter''s parameters and the filter characteristics, and particularly in the second order damped filters. The applications in practical filter design are also proposed. At last, the protection schemes of filter are included in the design. The electromagnetic transients program (EMTP) is applied to the simulations of transients during the switching of filters. These procedures will enforce the design process of filters. This thesis studies two practical cases of filter design. One is a plastic plant and the other is a metal factory. These two industrial systems respectively are with rectifiers and arc furnaces. Simulation results indicate that the proposed method could not only solve the amplification problems but also reduce the harmonic pollution and improve the power quality.