摘要
因串补电容的存在,串补线路故障行波过程十分复杂,行波波头识别困难。该文从行波能量的角度出发,采用特定时窗下的能量比函数法来获取故障行波波头,实现串补线路的行波测距。研究串补电容对能量比函数的影响,论证能量比函数法应用于串补线路故障测距的正确性,并分析时窗宽度的选取原则。针对某串补线路,建立仿真模型,采用双端测距法,在考虑干扰的情况下,将能量比法用于串补线路故障测距,对串补装置位于线路中间和两侧的情况分别进行仿真验证。ATP/EMTP仿真试验数据处理结果表明,所提方法能有效应用于串补线路故障测距,精度高,计算简便,不受串补装设位置和故障合闸角的影响。
The existence of the series compensation capacitor results in the complex fault-travelling wave process of the series compensated lines and the difficulty of the wavefront recognition. From the angle of the traveling wave energy, this paper obtained the fault traveling wave by using the energy ratio function in a specific time window, leading to the realization of the travelling wave fault location of the series compensated lines. The influence of the series compensation capacitor on the energy ratio fimction was studied. The correctness of the application of the energy ratio function in the fault location of the series compensation lines was verified, and the principle of selecting the width of the time window was analyzed. For a series compensation transmission lines, the simulation model was established. With double terminal fault location method, under the condition of considering the interference, the energy ratio method was used to series compensated line fault location. The cases that the series compensation was located on the middle and on the both sides of the lines were simulated respectively. ATP/EMTP simulation results show that the method can be effectively applied in the fault location of the series compensation lines because of its superiority of high precision, simple calculation and immunity to the series compensation installation position and fault close angle.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2015年第20期5228-5234,共7页
Proceedings of the CSEE
基金
陕西省自然科学基础研究计划资助项目(2014JM 2-5077)~~
关键词
串补线路
行波
故障测距
能量比
时窗
series compensated line
traveling wave
faultlocation
energy ratio
time window
