Numerical Simulation of Residual Voltage Monitoring Device for 220kV Metal Oxide Arresters

In long-term operation, the metal oxide arrester is prone to malfunction due to improper maintenance. It reduces the protection capability to power system. In this paper, a new topology is proposed. It can effectively solve the existing problems of metal oxide arresters in transmission lines. The three-dimensional axisymmetric model of metal oxide arrester and its residual voltage monitoring device is established in the finite element software. The characteristics of metal oxide arrester are simulated and calculated. By adjusting the distance between ceramic capacitive core sensor and metal oxide arrester and its capacitance value, the electric field and potential distribution of metal oxide arrester are calculated. In normal operation, the whole topological structure is simulated and calculated. The results show that the topological structure of metal oxide arresters residual voltage monitoring device can effectively improve the electric field and potential distribution of metal oxide arresters. In normal operation, it can effectively reduce the loss of metal oxide arrester. The operational life of metal oxide arresters can be improved.