基于双端弱同步的配电网行波测距方法  

Fault location method based on traveling wave with dual-terminal weak synchronization for distribution network

作　　者：靳维 陆于平[1] JIN Wei;LU Yuping(School of Electrical Engineering,Southeast University,Nanjing 210096,China)

机构地区：[1]东南大学电气工程学院,江苏南京210096

出　　处：《电力自动化设备》2018年第8期102-109,共8页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51677026;51377022)~~

摘　　要：将故障后双端初始行波波头到达时间作为双端初始时刻,进而检测后续行波波头的相对时刻,分别将双端在特定的时间内行波波头到达时刻组成时间序列集合。再根据双端时间序列集合的相互映射关系,计算故障点的准确位置。所提方法有效利用了单端测距精度高的特点,解决了单端行波测距波头识别困难的问题,同时避免了双端精确同步对时的要求。利用PSCAD进行仿真,仿真结果表明了该方法测距精度高,具有极强的适应性。Taking the arrival time of the first wave front after fault as the initial time, the relative times of the follow- up wave fronts within the specified time are detected and combined as the time series for both terminals. The accurate fault location is calculated according to the mutual mapping relationship between the time series of two terminals. The proposed method fully uses the high accuracy of single-terminal fault location method, solves the problem of wave front identification, and avoids the requirement of accurate synchronization between two terminals. The simulation is carried out with PSCAD, and the simulative results show the high precision and strong adaptability of the proposed method.

关 键 词：配电网 故障测距 双端测距 行波 弱同步 时间序列 

分 类 号：TM77[电气工程—电力系统及自动化]