两端带并联电抗器的同杆双回线路故障性质判别方法研究  

Method to Identify Faults Properties for Common-tower Double-circuit Transmission Line With Shunt Reactors

作　　者：程琳[1] 王瑞[2] 

机构地区：[1]西安理工大学水利水电学院,陕西西安710048 [2]国网福建省电力有限公司经济技术研究院,福建福州350000

出　　处：《陕西电力》2016年第5期64-68,共5页Shanxi Electric Power

摘　　要：提出了一种基于分相电流差动原理的两端带并联电抗器同杆并架平行双回线路故障性质判别方法,即以线路两侧并联电抗器电流为已知量,通过6序故障分量法求取并联电抗器电流的同向量和反向量,结合相模交换进行模分量电容电流补偿,比较线路两端并联电抗器补偿后电流以实现故障性质判别,并通过EMTP仿真验证了该方法的正确性。Based on the principle of segregated current differential,the method to judge fault character for parallel transmission lines with shunt reactors at both ends is proposed.In the proposed method,the currents in shunt-reactors are taken as known quantities.The capacitive current compensating by phase-modulus transformation with six-sequence fault component is calculated,and current differential principle of shunt reactors currents after compensating at both ends are compared.The EMTP simulation shows that the proposed judgment method can effectively distinguish permanent fault from instantaneous fault of parallel transmission lines.

关 键 词：平行双回线路 并联电抗器 电流差动 电容电流补偿 

分 类 号：TM773[电气工程—电力系统及自动化]