一侧同杆四回线与两侧同杆双回线构成的T型输电线路故障测距新方法  

A new fault locating of T-type transmission line consisting of four parallel-line and double circuit

作　　者：于仲安[1] 程明钊 郭培育[1] 邰能灵[2] 

机构地区：[1]江西理工大学电气工程与自动化学院,江西赣州341000 [2]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《电力系统保护与控制》2014年第15期8-14,共7页Power System Protection and Control

基　　金：国家自然科学基金资助项目(51177066;51377104)~~

摘　　要：通过深入研究同杆四回线与双回线构成的混合输电线路的特点,提出了相应的反序正序网络。在此基础上,综合反序正序电流,再利用故障支路的母线处始端推算到故障点的反序正序电压与从T支节点处推算到故障点的反序正序电压相等的关系得出测距方程,基于方程的解同时进行故障侧判断和测距。大量的PSCAD/EMTDC仿真结果验证了新方案的正确性及精确性,并且该算法的精度不受故障类型、过渡电阻、系统运行方式和系统阻抗等因素的影响。Based on the characteristics of mixed lines composed by four-circuit lines and double-circuit lines on the same tower, the corresponding inverted-sequence positive sequence networks are proposed, on the basis, this paper combines with negative current and positive current and uses the relationship that the negative and positive voltage from bus beginning terminal of fault branch to fault point is equal to the voltage from the T branch node to fault point to derive the fault location equation. According to the solution of the equation, its fault side and fault locating are detected simultaneously. Results of PSCAD/EMTDC simulation verify that the new scheme is accurate and not influenced by fault type, transition resistance, system operating mode and other factors on locating precision.

关 键 词：同杆四回线 同杆双回线 反序电流 混合线路 故障测距 

分 类 号：TM75[电气工程—电力系统及自动化]