Modeling and evaluation of the performance of hybrid HV lines against transient lightning and switching surges

Articles in Press

Document Type : Research Paper

Authors

Faculty of Electrical and Computer Engineering, Semnan University, Semnan, Iran

Abstract

Due to economic and technical constraints, hybrid lines (over head transmission line – power cables) remain necessary in suburban and urban areas. A critical challenge in studying these hybrid lines is their performance under transient lightning and switching surges. These transient overvoltages risk a significant threat to the insulation of power grid equipment, with cables being particularly vulnerable. This article analyzes the critical parameters influencing the magnitude of transient overvoltages in hybrid lines and explores various methods for mitigating these surges. Utilizing EMTP-RV software for modeling and simulation, the article meticulously investigates the maximum stresses imposed on cable insulation by overvoltages. Additionally, it presents solutions and recommendations for reducing transient overvoltages to acceptable levels. The results of the studies showed that by using the proposed solutions, the range of transient stresses caused by lightning and switching in the combined lines can be sufficiently reduced to prevent the destruction of equipment insulation (especially cable insulation).

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Main Subjects

Journal of Modeling in Engineering

Articles in Press, Accepted Manuscript
Available Online from 14 September 2025

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History

  • Receive Date: 28 July 2024
  • Revise Date: 25 May 2025
  • Accept Date: 18 August 2025

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