超高压同杆双回线单回运行时非全相故障精确计算  

Accurate Calculation Method for Open Phase Fault of EHV Double Circuits with Single Circuit Operation

作　　者：林军[1,2] 严利雄 王汇 

机构地区：[1]福建工程学院电子电气系,福建福州350108 [2]福州大学电气工程学院,福建福州350002 [3]国网湖北检修公司,湖北武汉430050

出　　处：《华北电力技术》2016年第10期14-19,共6页North China Electric Power

基　　金：福建省自然科学基金项目(2008J0011);福建省科技计划重点项目(2009H003)

摘　　要：两端带有并联电抗器和中性点电抗器的同杆双回线其中一条线路在停运检修时,由于双回线间的电气耦合,运行线路的非全相故障状态对停运线路产生影响。介绍两端带有并联电抗器和中性点电抗器的同杆双回线其中一条线路在停用时,运行线路单相接地故障后的非全相运行状态下的精确计算方法以及对检修线路的感应电压。采用特征模量分解方法对同杆双回线解耦,构成的转移矩阵进行这种复杂故障的计算,计算了停运线路的电抗器挂线、退出和两端接地3种情况下两条线路之间的感应电压。结果表明第一种情况时的感应电压最高。When one circuit of double circuits on same tower is not operating in maintenance,open phase fault of circuit in operation will effect un-operating circuit,because of electrical coupling between doubles. The paper introduces a method to calculate open phase fault of double circuits with shunter and neutral reactor when one circuit is not in operation,as well as mutually induction voltage on un-operating circuit. By using eigen analysis method to de-couple six phases parameters of double circuits,the transfer matrix is constructed and the complex fault can be calculated.The mutually induction voltage on un-operating circuit is calculated,when open phase fault of circuit is in operation,considering the three cases,un-operating circuit cutoff breaker only,cutoff breaker with two ends grounding at same time,and cutoff both breaker and shunter. The results show in the case of un-operation circuit with shunter,the mutually induction voltage is the highest.

关 键 词：同杆双回线 复杂故障计算 电抗器 非全相 感应电压 

分 类 号：TM726[电气工程—电力系统及自动化]