Measurement and Modelling of Leakage Current Behaviour in ZnO Surge Arresters under Various Applied Voltage Amplitudes and Pollution Conditions
Document Type
Article
Publication Date
1-1-2018
Abstract
In zinc oxide (ZnO) surge arresters, leakage current usually flows across the arrester under normal operating condition. Leakage current is one of the factors which contribute towards degradation of surge arresters and therefore, it is very important to monitor the condition of surge arrester. In this work, the behaviour of leakage current in a ZnO surge arrester during normal operation, under different voltage amplitudes, wetness and pollution conditions was analysed. An 11 kV surge arrester model in three-dimensional space was subjected to finite element analysis (FEA) to determine the leakage current under different conditions. The results from the FEA model were compared with the measurement results to validate the model that has been developed. From comparison between the measurement and simulation results, physical parameters of a surge arrester that influence the leakage current under different conditions of the surge arrester were identified from the model. Through this work, a better understanding of leakage current behaviour can be attained, which may help in condition monitoring analysis on surge arrester in electrical utilities.
Keywords
surge arrester, leakage current, finite element analysis, zinc oxide, harmonic analysis
Divisions
fac_eng,umpedac
Funders
University of Malaya, Malaysia and Malaysian Ministry of Higher Education (MOHE): Research grants of HIR (grant No.: H-16001-00-D000048) and PPP (grant No.: PPP 2016A-PG236)
Publication Title
Energies
Volume
11
Issue
4
Publisher
MDPI