LAPSE:2023.15388
Published Article
LAPSE:2023.15388
Evaluation of the Transient Overvoltages of HVDC Transmission Lines Caused by Lightning Strikes
March 2, 2023
Abstract
High-voltage direct-current (HVDC) transmission systems are considered an outstanding solution due to high electrical losses emerging from long-distance transmission. However, HVDC transmission lines (TLs) are vulnerable to lightning strikes. In this work, the Yunnan-Guizhou 500 kV HVDC transmission system is used as a case study to evaluate the impact of lightning strikes on DC-TL overvoltages, as no research studies have been conducted to assess the lightning transient behavior of DC-TLs. A comprehensive investigation of the 500 kV DC-TL transient performance during lightning strikes is performed, taking into account different technical aspects that have not been studied in detail by previous researchers. Additionally, analysis of the back-flashover phenomenon has not been conducted well in previous work, and results on the effect of changing the lightning strike current peak and tower grounding resistance on shielding-failure flashover are quite limited. The distributed-parameter model is used to represent the DC-TL using the electromagnetic transients program (EMTP), considering real parameters of shielding wires and DC towers to study the lightning impact in the case of back-flashover and shielding-failure phenomena. Lightning strike is applied to the shielding wire, and the impact of increasing the peak value of lightning current is investigated on the back-flashover occurrence. Moreover, the influence of tower grounding resistance variation on the transient overvoltages across the tower body and back-flashover phenomenon is evaluated. From the simulation results, increasing the lightning current peak and grounding resistance results in higher overvoltages across the tower body, which increases the probability of back-flashover. Additionally, the shielding failure of the TL is assumed, and the variation impact of the lightning current peak and grounding resistance on shielding-failure flashover is investigated. The results show that the impact of the lightning current peak has a more significant impact than the grounding resistance in the case of shielding-failure flashover.
High-voltage direct-current (HVDC) transmission systems are considered an outstanding solution due to high electrical losses emerging from long-distance transmission. However, HVDC transmission lines (TLs) are vulnerable to lightning strikes. In this work, the Yunnan-Guizhou 500 kV HVDC transmission system is used as a case study to evaluate the impact of lightning strikes on DC-TL overvoltages, as no research studies have been conducted to assess the lightning transient behavior of DC-TLs. A comprehensive investigation of the 500 kV DC-TL transient performance during lightning strikes is performed, taking into account different technical aspects that have not been studied in detail by previous researchers. Additionally, analysis of the back-flashover phenomenon has not been conducted well in previous work, and results on the effect of changing the lightning strike current peak and tower grounding resistance on shielding-failure flashover are quite limited. The distributed-parameter model is used to represent the DC-TL using the electromagnetic transients program (EMTP), considering real parameters of shielding wires and DC towers to study the lightning impact in the case of back-flashover and shielding-failure phenomena. Lightning strike is applied to the shielding wire, and the impact of increasing the peak value of lightning current is investigated on the back-flashover occurrence. Moreover, the influence of tower grounding resistance variation on the transient overvoltages across the tower body and back-flashover phenomenon is evaluated. From the simulation results, increasing the lightning current peak and grounding resistance results in higher overvoltages across the tower body, which increases the probability of back-flashover. Additionally, the shielding failure of the TL is assumed, and the variation impact of the lightning current peak and grounding resistance on shielding-failure flashover is investigated. The results show that the impact of the lightning current peak has a more significant impact than the grounding resistance in the case of shielding-failure flashover.
Record ID
Keywords
back-flashover, DC towers, HVDC transmission, lightning overvoltages, lightning strikes, shielding failure, transient analysis
Subject
Suggested Citation
Zalhaf AS, Zhao E, Han Y, Yang P, Almaliki AH, Aly RMH. Evaluation of the Transient Overvoltages of HVDC Transmission Lines Caused by Lightning Strikes. (2023). LAPSE:2023.15388
Author Affiliations
Zalhaf AS: School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China; Electrical Power and Machines Engineering Department, Tanta University, Tanta 31511, Egypt [ORCID]
Zhao E: School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Han Y: School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Yang P: School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Almaliki AH: Department of Civil Engineering, Faculty of Engineering, Taif University, Taif 21944, Saudi Arabia [ORCID]
Aly RMH: Department of Civil Engineering, Faculty of Engineering, Taif University, Taif 21944, Saudi Arabia
Zhao E: School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Han Y: School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Yang P: School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Almaliki AH: Department of Civil Engineering, Faculty of Engineering, Taif University, Taif 21944, Saudi Arabia [ORCID]
Aly RMH: Department of Civil Engineering, Faculty of Engineering, Taif University, Taif 21944, Saudi Arabia
Journal Name
Energies
Volume
15
Issue
4
First Page
1452
Year
2022
Publication Date
2022-02-16
ISSN
1996-1073
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PII: en15041452, Publication Type: Journal Article
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LAPSE:2023.15388
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https://doi.org/10.3390/en15041452
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