直流融冰架空地线单端行波故障测距

Single-ended Traveling Wave Fault Location in Overhead Ground Wire of DC-based Deicing

在对架空地线进行直流融冰时可能由于连接不可靠发生接地短路故障,人工巡线查找故障的方法费时费力,该文在分析了架空地线发生故障后行波的折、反射过程的基础上,通过区分第二次接收到的故障波波头的极性,提出应用单端行波故障测距方法对融冰过程中的架空地线进行故障测距,用PSCAD仿真搭建仿真模型,并用MATLAB进行数据处理,得到测距结果。仿真结果表明,用单端行波法对融冰过程中的架空地线进行故障测距可以取得准确、可靠的测距结果。

Ground short circuit fault may occur to DC-based deicing of overhead ground wire due to unreliable connection.Manual line patrol to find out the faults is time-consuming and arduous. This article analyzes the refraction process and reflection process of the traveling waves after the fault of overhead ground wire and puts forward a single-ended fault location method based on traveling wave to conduct fault location to overhead ground wire in the process of deicing by distinguishing the polarity of the fault wave head received in the second time.According to the method,a simulation model is built by PSCAD simulation and the data is processed by MATLAB so as to obtain the location resuh.The simulation result indicates that the single-ended method based on traveling wave can obtain accurate and reliable location result by fault location of the overhead ground wire in the process of deicing.