Increasing the capacity of transmission lines via current uprating: An updated review of benefits, considerations and developments

Ntuli, Mavula; Mbuli, Nhlanhla; Motsoeneng, Lethoko; Xezile, Ronald; Pretorius, J.H.C.

doi:10.1109/aupec.2016.7749338

Cited by 14 publications

(11 citation statements)

References 11 publications

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“…Therefore, developing a new transmission line system (i.e., 500 kV and 275 kV) is one of the options for Malaysia's electric utility provider in continuing to meet and stabilise the country's rapid demand. However, the development of a new transmission line system should take into consideration many aspects, particularly technical, environmental, and financial feasibility aspects [1,8,[27][28][29][30][31]. In Malaysia, environmental aspects are major issues concerning any new development of a transmission line system (i.e., 500 kV and 275 kV) as such developments mainly involve exploration into gazetted areas and forest reserves.…”

Section: Voltage Uprating Issues and Challenges In Malaysiamentioning

confidence: 99%

“…In recent years, the growth of technologyies and cumulative populations and the increase in the quality of life experienced by industrialised and developed countries in the world have led to an increasing demand for electricity [1][2][3][4][5][6][7]. As of 2018, the Malaysian National Grid consisted of a domestic transmission line system of approximately 23,082 km and 443 domestic transmission line system substations.…”

Section: Introductionmentioning

confidence: 99%

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Issues and Challenges in Voltage Uprating for Sustainable Power Operation: A Case Study of a 132 kV Transmission Line System in Malaysia

et al. 2021

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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.

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Section: Voltage Uprating Issues and Challenges In Malaysiamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Issues and Challenges in Voltage Uprating for Sustainable Power Operation: A Case Study of a 132 kV Transmission Line System in Malaysia

et al. 2021

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“…The commercially available DLR oriented technologies together with overview of application methods as well as benefit analyses were also discussed further in other review studies such as [9][10][11][12] from different points of view. A very detailed review report on DLR from benefits, challenges, practical evidence and power system stakeholders' insights points of view was further provided in [13] recently by U.S. Department of Energy.…”

Section: Literature Reviewmentioning

confidence: 99%

A Comprehensive Overview of Dynamic Line Rating Combined with Other Flexibility Options from an Operational Point of View

et al. 2020

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The need for flexibility in power system operation gradually increases regarding more renewable energy integration, load growth, etc., and the system operators already invest in this manner to enhance the power system operation. Besides, the power system has thermally sensitive assets such as lines, transformers, etc. that are normally operated under highly conservative static ratings. There is a growing trend in this regard to use the actual capacity of such assets dynamically under varying operating conditions leading to a dynamic thermal rating concept which is referred as dynamic line rating (DLR) approach specifically for lines. This study provides a comprehensive overview of existing perspectives on DLR and combination with other flexibility options from an operational point of view. Apart from the existing review studies more focused on implementation category of DLR concept, the concentration on more operational stage from the power system operation point of view leads the difference of this study compared to the mentioned studies. A categorization of the DLR implementation for either being sole or combined usage as a flexibility option is further realized. Besides, a geographically categorized analysis on existing practical evidence on DLR concept and implementations is also presented in this study.

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“…The new development of a transmission system is one of the opportunities for utilities to sustain and stabilise a country's rapid growth. However, issues are associated with the new development of transmission lines involving technical, environmental, and financial feasibility [1][2][3][4][5][6]. Some of the concerns that can be critically relevant in the permitting process are transmission lines are visual impact, property devaluation, suspected health effects from EMF, impact on land use, impact on ecological systems, and environmental impact of the transmission line construction and maintenance [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Systematic Approaches and Analyses on Voltage Uprating of 132 kV Transmission Lines: A Case Study in Malaysia

et al. 2021

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With the ageing infrastructure and fast-growing demand faced by utilities worldwide, voltage uprating is one of the most effective solutions and strategic approaches in asset management decisions. In this study, a systematic voltage uprating method is used to propose the new voltage level, based on the existing transmission lines’ physical structure, by utilising appropriate techniques. Prior to work conducted, the existing 132 kV transmission line was first examined in terms of the clearances and the components attached, and a technical issue on the clearance under still air was found to be a significant concern, particularly on phase-to-earth arrangements. Next, the proposed techniques and processes, by increasing the insulation strength and improving air conductor clearances, were used for the individual existing 132 kV transmission tower. The proposed voltage uprating of the 132 kV transmission tower comprehensively examines phase-to-earth under normal and extreme wind conditions based on electrical clearance requirements for 275 kV transmission lines. The proposed uprating model was then simulated using the Finite Element Method (FEM)-based commercial software under several lightning conditions, i.e., various basic lightning insulation levels (BIL) and different flashover mechanisms, taking into consideration still air and wind conditions for the voltage profile and its insulation strength analyses. The study found that the voltage profile condition for the proposed voltage uprating model was able to withstand its BIL under all conditions and thus satisfied the electrical requirement needed.

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Increasing the capacity of transmission lines via current uprating: An updated review of benefits, considerations and developments

Cited by 14 publications

References 11 publications

Issues and Challenges in Voltage Uprating for Sustainable Power Operation: A Case Study of a 132 kV Transmission Line System in Malaysia

Issues and Challenges in Voltage Uprating for Sustainable Power Operation: A Case Study of a 132 kV Transmission Line System in Malaysia

A Comprehensive Overview of Dynamic Line Rating Combined with Other Flexibility Options from an Operational Point of View

Systematic Approaches and Analyses on Voltage Uprating of 132 kV Transmission Lines: A Case Study in Malaysia

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