特高压直流输电线路雷击故障辨识方法分析

Analysis of Lightning Fault Identification Methods for UHVDC Transmission Lines

针对特高压直流输电线路有可能发生的雷电故障,以扎鲁特—青州±800 kV特高压直流工程为研究对象,通过雷击故障仿真进行相应的特征分析,建立计算模型获取电气故障数据,结合电气特征量和非电气特征量,采用BP神经网络方法对雷击故障原因进行辨识,将辨识结果与所设置故障作比较,以此来确定该方法的准确性。经检验,该方法能够准确辨识特高压直流输电线路的雷击故障。

In view of the possible lighting fault to the UHVDC transmission line,take the±800 kV UHVDC project from Zhalute to Qingzhou as the research object,make an analysis of the characteristics of the lightning failures through the simulation analysis.The calculation model is established for electrical fault data,combined with the electrical and the non⁃electrical characteristics quality,BP neural network method is used for lightning research to identify the cause of the problem.The identification results are compared with the set faults to determine the accuracy of the method.The results show that this method can accurately identify the lightning fault of UHVDC transmission lines.