Abstract
Ageing grid infrastructure is a critical issue that is currently faced by electrical utilities worldwide, resulting in crucial decisions that must be made for the replacement, repair, or refurbishment of assets under constrained budgetary conditions, as well as other factors. As one of the fastest-developing countries globally, Malaysia is steadily growing in terms of its cumulative population, large industries, and advanced transportation sector, leading to an increasing electricity demand and, consequently, putting stress on electric utility providers to meet these tremendous demands. Significant concerns in the new development of transmission in Malaysia are the environmental issues, which involve exploration in gazetted areas and forest reserves. This paper describes the issues and challenges in developing a new transmission line system in Malaysia. In recent years, uprating existing transmission line systems has been one of the best asset management decisions for electric utility operators in order to meet such a demand for capacity. This paper assesses the technical issues and conventional methods of uprating the voltage of an existing transmission line system. The initial study found that the phase-to-Earth clearance does not fulfil the electrical clearance envelope. The study on the existing 132 kV transmission line system further analysed these issues and proposed an appropriate technique for uprating to a 275 kV transmission line system. Finally, the results indicate that the voltage uprating of the 132 kV transmission line system to 275 kV is able to satisfy the electrical clearance requirement envelope.
Highlights
Voltage Uprating Issues and Challenges in MalaysiaMalaysia’s population has been steadily growing, reaching 32.37 million people in the year 2020
Introduction published maps and institutional affilA power system is a network that involves generation, transmission, and distribution systems
This study has proposed a mechanism to upgradethe existing 132 kV transmission line system in Malaysia in order to cater to thetremendous demand for power transfer
Summary
Malaysia’s population has been steadily growing, reaching 32.37 million people in the year 2020. The growth of large industries and the high-tech transport sector have been steadily contributing to the increasing demand for electricity. This leads to pressure on electric utility providers in Malaysia to provide sufficient electricity year on year. In Malaysia, environmental aspects are major issues concerning any new development of a transmission line system (i.e., 500 kV and 275 kV). Electric utility providers all around the world utilise different mechanisms based on their capabilities to resolve technical, environmental, and financial issues. There are several aspects of voltage uprating that can be assessed prior to practical considerations, including its phase-to-earth clearances, insulation coordination statutory clearances (i.e., phase-to-ground), and insulation at the tower (i.e., suspension string insulator length and its creepage distance). It is essential to ensure that the requirements of electrical clearances under wind conditions are fulfilled
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