利用过渡电阻特征的输电线路故障测距算法  

Fault Location Algorithm of Transmission lines Taken Advantage of Fault Resistance Characteristic

作　　者：王海港[1] 孙月琴[1] 谢民[1] 赵晓春[1] 

机构地区：[1]国网安徽省电力公司,合肥230022

出　　处：《电力系统及其自动化学报》2016年第3期77-81,86,共6页Proceedings of the CSU-EPSA

摘　　要：在输电线路故障测距算法中,不同步的数据增加了双端法测距的复杂度,影响了其实用性。通过计算故障过渡电阻的方法消去输电线路两侧数据不同步的影响,并基于故障过渡电阻的电阻性特征,利用工频量计算所得的过渡电阻复数虚部为0建立测距方程。对三相输电线路,通过凯伦贝尔变换对输电线路三相解耦,针对单相故障和相间故障给出了相应的计算方程及其解法。通过EMTDC仿真验证了该测距算法的精确性,并对算法进行了不同线路参数及测量误差的稳定性和精确性验证。Among the algorithms of transmission line fault location, asynchronous data increased the complexity and the time consumption of two terminal algorithms, hence which practical using were deteriorated. This paper erased the influ- ence of unsynchronized time by calculating the fault resistance at the fault location. Because the image part of the com- plex of fault resistance is zero, which was deduced from the two terminal current and voltage phasors, the non-linear function which has only one unknown variable was built to be solved. This algorithm constructed different formulas according to different fault types using Karenbauer transformation to decouple three phase transmission line. Simulation based on EMTDC proves its accuracy and stability under different parameter and measurement errors.

关 键 词：过渡电阻 故障测距 双端 不同步数据 输电线路 

分 类 号：TM711[电气工程—电力系统及自动化]