Online Condition Monitoring Technique for Metal Oxide Surge Arresters Based on Leakage Current Components
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Metal Oxide Surge Arresters (MOSA) are connected in the system for protection of power system against over voltages. MOSA behaves as an insulator under normal working condition and offers conductive path under over voltage condition. Zinc oxide elements (ZnO Blocks) having non-linear voltage-current characteristics is used in construction of MOSA. Ageing effect under various operating conditions such as pollution, moisture ingress caused degradation of MOSA. Degradation of zinc oxide elements increase the leakage current flowing through it which can create thermal runaway conditions for MOSA. Once, it reaches to thermal runaway condition cannot return to normal working condition results in premature failure of MOSA. As MOSA constitutes a core protective device for electrical power system against transients. Condition monitoring of surge arresters should be done at periodic intervals. Online condition monitoring techniques are much popular. This paper presents the evaluation technique for MOSA based on the leakage current analysis. Maximum amplitude of total leakage current (IT), Maximum amplitude of fundamental resistive leakage current (IR) and maximum amplitude of third harmonic resistive leakage current (I3rd) have been analysed as indicators for surge arrester condition monitoring. The ratios of these leakage current has been evaluated for to access the condition of MOSA. The obtained results are validated with other condition monitoring tests.
Tiago G. Zacarias and Wilson C. S., “A Bibliometric and comprehensive review on condition monitoring of metal oxide surge arresters”, Sensor 2024, 24,235. MDPI.
Laiz Souto and Philip C. Taylor and Jonathan Wilkinson “Probabilistic impact assessment of lightning strikes on power systems incorporating lightning protection design and asset condition”, Int. J. Electr. Power Energy Syst. 2023, 148, 108974.
S. Mohammed Arshad, Asanka S. Rodrigo, “Modified phase shifting of leakage current to condition monitoring of metal oxide surge arresters in power system.” Mortuwa Engineering Research Conference (MERC on), 978-1-5386-4417-1/18, 2018, IEEE pp 300-305. 2018.
Z. Abdul Malek, Novizon Yusoff, Mohd Fairoz and Mohd Yousuf, “Filed Experience on Surge Arrester Condition monitoring – Modified Shifted Current Method”. UPEC 2010, 31st August – 3rd Sept. 2010.
Abdullah Munir, Z. Abdul Malek and Rai Naved Arshad, “Resistive component extraction of leakage current in metal oxide surge arrester: A hybrid method”. Elsevier Journal, Measurement 173 (2021) 108588.
Surge Arresters – Selection and Application Recommendation”, IEC Standard 60099-5, 2013.
Surge Arresters – Metal oxide surge arresters without gaps for a.c. systems, IEC Standard 60099-4, 2014.
Behnam Rajbar, Ali Darvishi, Rahman Dashti and Hamid Reza Shaker, “A survey of diagnostic and condition monitoring of metal oxide surge arrester in the power distribution network”, MDPI, Energies 2022, 15, 8091. 2022.
