Open AccessNumerical modelling of MOV with Voronoi network and finite element method
Author(s) -
Zhou Qibin,
Yang Hongxiang,
Huang Xin,
Wang Manyu,
Ren Xin
Publication year - 2021
Publication title -
high voltage
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.732
H-Index - 20
ISSN - 2397-7264
DOI - 10.1049/hve2.12072
Subject(s) - varistor , voronoi diagram , finite element method , materials science , clamping , voltage , grain boundary , electrical resistivity and conductivity , computer simulation , electronic engineering , mechanics , microstructure , electrical engineering , structural engineering , engineering , geometry , mathematics , mechanical engineering , composite material , physics
The electrical and thermal characteristics of metal oxide varistor (MOV) are essential for the study of MOV performance and degradation. This paper provides a modelling method of MOV to simulate its microstructure geometry with the Voronoi network and derive the electrical functions on the grain boundaries. A series of discrete data to describe the resistance‐voltage (R–V) characteristics of MOV from experiments is applied to the proposed model. Through 8/20 μs surge current experiments, the electrical conductivity of MOV is determined to achieve the simulation of the clamping voltage. With this model, the current distribution and temperature distribution over a MOV sample are simulated and analysed by the finite element method (FEM). The simulation results show good agreement with the experimental measurement and inherent feature of MOV.