利用六序分量复合序网法分析同杆双回线断线故障的新方法

本文结合双回线的特点，引入了六序故障分量，推导出同杆双回线各种断线故障的六序分量解析表达式，由此提出了六序复合序网分析双回线断线故障的新方法，此方法在分析双回线的断线时非常简单，并且六序故障分量之间的相位关系和幅值关系在复合序网中直观地表现出来，通过EMTP仿真计算证明了本文所提方法的正确性。

A NEW SERIES FAULT ANALYSIS METHOD OF THE DOUBLE CIRCUIT LINE BY USE OF THE INTER-CONNEXION OF SIX SEQUENCE NETWORKS

This paper,based on the characteristics of Double-circuit line,introduces the six sequence components into fault analysis.Formulas of six sequence components for all se- ries fault types which would occur on Double-circuit line are derived.By summerizing the formulas,a new series fault analysis method of Double-circuit line is presented which is based on the interconnexion of six sequence networks(ISSN).The method is simple in series fault analysis,and relations of both phase angle and amplitude among six sequence components are displayed directly in the ISSN.Results of digital simulation by use of EMTP program and the ISSN are presented.