Research on Lightning Point Location of Transmission Line Based on Improved Two-Terminal Traveling Wave Method

摘要

In the southern region, lightning strikes occur frequently, causing serious harm to the stable and safe operation of the power grid. In order to strengthen the lightning protection level of the line and save investment, it is necessary to strengthen the insulation of poles, towers, lines and adjacent parts those are frequently struck by lightning, especially in hilly and mountainous areas. In Sichuan, Yunnan and Shenzhen and others regions to install a lot of lightning overvoltage online monitoring device, on this basis, put forward based on the improved double terminal method of travelling wave transmission line lightning positioning technology, used for statistics on a line by lightning tower or adjacent lines of by lightning overvoltage waveform on both ends of the acquisition, to extract the first time, calculate the time difference, and have been identified by lightning tower measured time take difference divided by the average of double tower wave propagation time of adjacent tower by direct lightning and reference tower distance of implementation of lightning orientation. Through the detection of measured data, it has good precision and good application prospect. paragraph.