Lightning Fault Location of 10kV Distribution Network With Multistage Branch Lines

Abstract

With the continuous expansion of the distribution network scale, the multi-level branch line of the distribution network has been widely used because of its economic and flexible power supply. However, multi-level branch lines also make fault location more challenging. This paper proposes a lightning fault location method for distribution networks with multi-level branch lines. Firstly, the distribution network is divided into several areas, and the lightning strike area is judged by the polarity of the lightning current on the line. Then, according to the number of current monitoring terminals in the lightning strike area, the appropriate lightning location determination matrix is selected. This method not only takes into account the shunting effect of many branch lines in the distribution network on the lightning current of the main line, but also considers the lightning fault location on the secondary branch line. It is beneficial to improve the lightning fault location finding, patrol inspection, and rapid power supply recovery of complex distribution lines in mountainous areas, reduce the burden of personnel, and improve the intelligent and digital level of distribution lines.