Analysis of lightning strike fault characteristics in data-driven dense channels of new power systems

Abstract:
With the rapid development of new power systems, combined with global warming and other background, the new power system faces an obvious increase in extreme disaster weather events such as lightning. The intensive channel of new power system is the only channel of new energy power transmission. The frequent occurrence of lightning strikes has seriously threatened the safe and stable operation of new power system. By conducting research and analysis on the fault characteristics of lightning strikes in dense channels of new power systems, this paper summarizes the lightning strike disaster factors and the weak links of new power systems, and uses K-means clustering and other data-driven analysis methods to analyze the lightning strike failure factors and the lightning strike disaster mechanism. Seven main factors, including amplitude of lightning current, protection Angle, landform and altitude, were obtained. The sigmoid function was used to fit the lightning damage forms of the dense passage, and the judgment of different flashover forms of the dense passage was finally realized. Meanwhile, a simplified lightning damage model was established, and the data model verified the surface, and the accuracy of the model was as high as 93.53%. It can help on-site operation and maintenance personnel accurately determine the type of lightning fault, summarize the lightning fault and analyze the cause.