Simulation and Test of Spatial Interference of 1000 kV Arrester

Due to the influence of phase-to-phase coupling and space coupling, it is difficult to accurately extract the resistive current in the leakage current of the 1000 kV arrester, which affects the judgment of its health status. In this paper, the simulation calculation model of the real scene is established by scanning the 5 groups of 1000 kV surge arresters in the Jingmen UHV station, and the space capacitance matrix of the 1000 kV surge arresters is obtained, and the space interference current data is obtained based on the resistance-capacitance network theory and the simulation calculation of the road model. Comparing the simulation calculation results with the live detection results, the errors of the simulation data of each group of arresters are all within 5%, which verifies the correctness and feasibility of the simulation experiment approach, and conducts a resistive current test on the field measured data fix. The results show that the rapid construction of the complex three-dimensional solid model of the arrester and the surrounding electrified body can be realized through on-site Lidar scanning; the space interference current data of the arrester can be obtained through the simulation calculation of the field circuit model; based on the method proposed in this paper, the three-phase leakage of the arrester can be The full current is close to the state of no space coupling interference, and the resistive current extraction in the full current of the arrester is realized.