摘要
对由三端同塔四回线构成的T形输电线路特点进行分析,运用12序分量法将T型线路四回线相电流、相电压分解为e,f,g,h四种分量,消除了四回线间互感。分析了反序h1序网的电气量特点,当T形同塔四回线发生故障时,从支接点T推算得出故障点的反序h1序电压与由故障支路母线处计算得到故障点的反序h1序电压相等。基于此等量关系构造测距新方法。大量ATP仿真数据表明,该方法测距准确,且精度不受故障类型、过渡电阻,系统运行方式等影响。
The characteristics of teed circuit line with four-parallel lines on the same tower at three terminals have been analyzed in this paper. Twelve-sequence components method has been introduced to decouple mutual electromagnetic effect by decompose the phase current and phase voltage of teed circuit with four-parallel lines into e,f,g,h four components. When fault occurs on teed circuit with four-parallel lines on the same tower, the negative sequence hi-sequence voltage of the fault point calculated by the electrical measurements of the faulty branch bus is equal to that calculated by the equivalent negative sequence h-sequence electrical measurements of node T in the negative sequence h-sequence network. Based on this equivalent relation, a new method for fault line locating has been proposed. Lots of ATP simulation results show that the proposed fault locating algorithm is extremely high-accuracy and does not influenced by of fault type, transition resistance and system operating mode etc.
出处
《吉林电力》
2013年第5期17-21,共5页
Jilin Electric Power
基金
江西理工大学校级研究生创新专项资金项目(编号YC2012-X13)
关键词
T形同塔四回输电线路
故障测距
12序分量法
反序h1序电压
teed circuit with four-parallel transmission lines on the same tower fault locatingtwelve-sequence component method negative sequence hi-sequence voltage
