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N. A. Othman
Universiti Tun Hussein Onn Malaysia
Electrical & Electronics Engineering

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Prediction of surface leakage current of overhead insulators under environmental and electrical stresses F. S. Abdullah; M. A. M. Piah; N. A. Othman; A. Din
Bulletin of Electrical Engineering and Informatics Vol 9, No 5: October 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (500.753 KB) | DOI: 10.11591/eei.v9i5.2182

Abstract

Leakage current is one of the critical aspects to consider for overhead transmission line insulator’s condition and performance assessment. As the leakage current increase, the size of the dry band also will increase leads to the dry band arcing, deteriorate the insulator performance and contribute to the development of insulator flashover. Based on the literature study, other than the existence of contaminations on the surface of insulator combined with moisture, the variation in leakage current is also affected by the environmental and electrical stresses. Previous researches have shown the effect of environmental and electrical stresses on surface leakage current based on experimental and simulation results. This paper outlines an analytical approach based on dimensional analysis to propose a new mathematical model of leakage current under environmental and electrical stresses. To justify the applicability of the derived dimensional model, the new model has been validated using previous researcher’s experimental results. The validation indicated that the proposed model had shown a good agreement with the previous experimental results. The proposed dimensional equation for this research work can be potentially used as a predictive performance model to evaluate and monitor the leakage current and insulator’s performance
Conductor sag comparison for 132 kV overhead transmission line improvement in Malaysia H. M. Luqman; M. N. R. Baharom; N. A. M. Jamail; N. A. Othman; R. Abd. Rahman; M. F. M. Yousof; Irshad Ullah
Bulletin of Electrical Engineering and Informatics Vol 9, No 1: February 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (517.533 KB) | DOI: 10.11591/eei.v9i1.1863

Abstract

This paper presents conductor sag comparison for 132 kV overhead transmission line improvement in Malaysia. Increasing industrialization and population growth around the world demands higher electricity supply. Power generation has yet to decline but transmitting sufficient electricity to consumers is worrisome due to scarce land space occupied by rapid urbanization. Hence reconductoring method was chosen to improve existing 132 kV overhead transmission line in Malaysia. A group of selected conductors were chosen for comparison where the high temperature low sag conductor stood out the most producing up to 40% sag reduction. This paper focuses on providing conductor alternatives to improve maximum sag of lowest conductor to ground for 132 kV transmission line in Malaysia in accordance to her climate and geographical factor.
Co-Authors A. Din F. S. Abdullah H. M. Luqman Irshad Ullah M. A. M. Piah M. F. M. Yousof M. N. R. Baharom N. A. M. Jamail R. Abd. Rahman