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ORIGINAL RESEARCH article

Front. Energy Res.
Sec. Smart Grids
Volume 13 - 2025 | doi: 10.3389/fenrg.2025.1461365

Generation mechanism and influencing factors of transient overvoltage on ultra high-voltage direct current transmission

Provisionally accepted
Weiwei Yao Weiwei Yao 1,2Jie Zhao Jie Zhao 1,3*Jinqiu Dou Jinqiu Dou 1,3Youhan Deng Youhan Deng 1,2Yushu Li Yushu Li 1,2Yilin Liang Yilin Liang 1,3Jing Chen Jing Chen 1,2
  • 1 Laboratory of Hydro-Wind-Solar Multi-energy Control Coordination, Wuhan 430072, China, Wuhan, China
  • 2 China Three Gorges Corporation Science and Technology Research Institute, Beijing, China
  • 3 School of Electrical Engineering and Automation, Wuhan University, Wuhan, Hebei Province, China

The final, formatted version of the article will be published soon.

    The transient overvoltage caused by faults in ultra-high-voltage direct current (UHVDC) transmission lines and alternating current (AC) systems can adversely affect system safety and stability. This study theoretically analyzes the transient overvoltage generation mechanism caused by DC single-pole ground faults and typical fault conditions in two different cases by combining the DC line and AC system of the transmitting side. Considering the different generation mechanisms of the two transient overvoltages, the main factors affecting transient overvoltages were determined to be the DC line ground fault location, DC filter main capacitance, AC system short-circuit ratio, and DC transmission power. Finally, through a simulation of UHVDC transmission engineering, the relationship between various influencing factors and overvoltage was obtained, which can provide guidance in transmission engineering UHVDC design.

    Keywords: UHVDC, transient overvoltage, Mechanism analysis, short-circuit ratio, fault conditions

    Received: 08 Jul 2024; Accepted: 23 Jan 2025.

    Copyright: © 2025 Yao, Zhao, Dou, Deng, Li, Liang and Chen. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Jie Zhao, Laboratory of Hydro-Wind-Solar Multi-energy Control Coordination, Wuhan 430072, China, Wuhan, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.