1. A review of switching overvoltage modeling in UHV AC transmission lines.
- Author
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Reddy, Sheri Abhishek and Kumari, M. Sailaja
- Subjects
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ELECTRIC lines , *CHOICE (Psychology) , *SCHOLARLY periodicals , *HIGH voltages , *CONFERENCE papers , *OVERVOLTAGE - Abstract
This review article on switching overvoltage modelling in UHV AC Transmission lines, provides a state-of-the-art analysis of switching overvoltages and their impact on insulation coordination in UHV AC transmission lines. Switching overvoltages, insulation coordination, switching transient modelling tools, and switching surge flashover rate mathematical models are examined in the paper. It also examines modelling concepts, transmission models, insulation coordination for Ultra High Voltage (UHV) versus Extra High Voltage (EHV) lines, simulation scenarios and platforms, and best practices for insulation coordination limited to transmission lines. The methodology involved extensive research, consulting academic journals and conference papers, and modelling switching overvoltages with a case study. Key findings show that transmission tower insulation decreases because actual switching overvoltages take longer time to reach their peak than the critical wave. Every switching action generates a switching overvoltage with a characteristic waveform, which impacts insulation coordination. The work reveals a gap in existing research, which often focuses on overvoltages generated by a few switching events. This review suggests considering overvoltages from primary switching operations for better assessment of insulation coordination. These aspects must be considered in insulation coordination to improve UHV AC transmission line reliability and security. • This review article presents an overview of the available literature on insulation coordination for UHV AC lines covering the various types of switching overvoltages that can occur in UHV AC lines. • This review article also provides a comprehensive overview of the current state of insulation coordination for UHV AC lines and highlights the importance of considering the switching overvoltages and four significant switching operations in the insulation coordination process. • This article also presents a comprehensive view of the modelling guidelines for modelling the UHV AC transmission system and a helps in choosing the right model for the transmission line. • A brief summary of simulation cases and simulation Platforms used for Switching Transients Studies is also presented based on the literature from 1962 to 2024. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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