Test and Simulation of Potential Distribution of UHV AC Arrester under Different Conditions

UHV AC arresters will be degraded to varying degrees due to the operating environment, including long-term moisture, breakdown and short circuit of the resistor, which makes the increasing unevenness of potential distribution, leading to a larger area of damage and even a safety accident such as arrester explosion. Hence it's need to analyze the potential distribution of arrester under different conditions. This article carried out a series of tests of the potential distribution of UHV AC arresters when partial damp and partial short-circuit using optical fiber current method, and established the corresponding ANSYS 3D simulation model according to the actual structure and the test method, which is used to calculate the potential distribution under the corresponding test conditions. The consistency of the test and simulation results verified the correctness of the simulation model. (paper)