2.6萬字 57頁
摘要：
統(tǒng)的故障分為對稱故障和不對稱故障兩大類。對于對稱故障，比如三相短路，由于沒有破壞電力網(wǎng)絡的三相對稱性，因此可以按照單相的分析方法進行分析計算。對于不對稱故障，比如單相接地短路，就不能使用單相的計算方法處理了。電力系統(tǒng)故障分析方法主要有網(wǎng)絡建模和故障計算等幾個方面。建立用于故障分析的網(wǎng)絡的數(shù)學模型是計算機編程計算的基礎。當前在電力網(wǎng)絡中最常用的網(wǎng)絡參數(shù)矩陣有節(jié)點參數(shù)矩陣和支路參數(shù)矩陣。在故障分析計算中一般采用網(wǎng)絡節(jié)點參數(shù)矩陣作為電力網(wǎng)絡的數(shù)學模型，又主要使用節(jié)點導納矩陣作為分析的基礎。本文研究了一種不對稱電力系統(tǒng)分析的計算方法——對稱分量法。這種方法不需要形成故障后全網(wǎng)的節(jié)點導納陣，可以方便地計算各種簡單故障和復雜故障。

關鍵詞：多態(tài)相分量法 三相不對稱 故障分析 不對稱電力系統(tǒng)

Abstract
his paper puts forwards the symmetrical components method as the calculating method for the analysis on faults of unsymmertrical power system. The admittance matrix for nods of whole network after faulting is not necessary,hence the calculation for various simple and complex faults are easy .In the process of calculation ,not only the decouplable feature of symmetrical elements in the coordinate system of symmetrical components is fully utilized,but also the symmetrical parts and unsymmetrical parts are treated as separate blocks, thus the efficiency of calculation is rasied moreover.
Key words: polymorphic phase components; three-phase unbalance; fault analysis; power system; symmetrical components method; unsymmertrical power system.