Research and application of jet stream arc-quenching lightning protection gap (JSALPG) for transmission lines

Wang, Jufeng; Liu, Jinlian; Wu, Guoqiang; Liu, Qiliang; Guo, Wei

doi:10.1109/tdei.2015.7076776

Cited by 23 publications

(6 citation statements)

References 12 publications

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“…To solve the problem caused by follow-up power frequency arc, some scholars and companies began to carry out studies of arcextinguishing equipment. In addition to the most commonly used line arresters, there are some other devices including a kind of arcing horn device that can generate substantial dielectric gas to extinguish the short circuit arc [4,5], the metal oxide varistor, which is able to suppress arc development [6], a type of arcquenching lightning protection gap, which is designed to blow high-speed jet stream to quench power frequency arc [7][8][9], electrical installation using magnetic force to elongate and truncate arc [10]. However, these devices have problems such as the lack of surge absorption capability, limited gas capsules, and the complex structure, which may cause equipment failure.…”

Section: Introductionmentioning

confidence: 99%

Influence of chamber structure on arc quenching in multigap system

Wang

Zhou

et al. 2020

High Voltage

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In order to improve the arc quenching ability of the multigap system, it is important to know the principle of arc quenching and how the chamber structure affects the arc development process in the multigap system. In this study, the twodimensional geometric model of the multigap system is established based on the magnetohydrodynamics theory in COMSOL multiphysics simulation platform. The principle of arc quenching in the multigap system is explained in detail by analysing the physical characteristics of the arc in the multigap system. The simulation result shows that the arc is compressed at large scales in the semi-closed chambers of the multigap system, which results in an instantaneous temperature rise of the arc, thus, forming the self-expanding airflow. The strong self-expanding airflow cuts off the arc channel and blocks the energy supply of the arc. The influence of the chamber structure on arc quenching in the multigap system is manifested in the fact that proper improvement of the width and depth of the chamber subserves arc cooling, the reduction of the deflection angle and the increment of the number of the chambers are conductive to arc extinction.

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Section: Introductionmentioning

confidence: 99%

Influence of chamber structure on arc quenching in multigap system

Wang

Zhou

et al. 2020

High Voltage

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“…Auxiliary devices for arc extinction are also recommended to improve the protection performance. In [15][16][17], a gas jet was used to elongate the arc and promote the arc cooling process.…”

Section: Protection Performance Improvement By Adjusting Circuit Paramentioning

confidence: 99%

Insulation Coordination of Arcing Horns on HVDC Electrode Lines: Protection Performance Evaluation, Influence Factors and Improvement Method

Liu

et al. 2018

Energies

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Abstract:Arcing horns are widely used in high voltage overhead lines to protect insulator strings from being destroyed by the free burning arcs caused by lightening faults. In this paper, we focus on the insulation coordination of arcing horns on the electrode lines of a 5000 MW, ±800 kV high voltage direct current (HVDC) system. The protection performance of arcing horns are determined by the characteristics of not only the external system but also the fault arc. Therefore, the behaviors and characteristics of long free burning arcs are investigated by the experiments at first. In order to evaluate the protection performance of arcing horns, the static stability criterion U-I characteristic method is introduced. The influence factors on the protection performance of arcing horns are analyzed theoretically. Finally, the improvement methods for the protection performance of arcing horns are proposed, and the diversified configuration strategy of arcing horns is recommended for cost saving.

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“…Lightning is a significant cause of temporary and permanent power outages, due to the abnormal stresses it puts on the distribution lines. Studies from China, Japan, and Malaysia indicate that lightning is a major cause of power outages [1,2], with 40-70% of the total number of outages caused by lightning [3]. In Thailand, statistics from the Metropolitan Electricity Authority (MEA) [4] report 5000 outages per year with an unknown cause that may be the result of lightning hitting the system.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a Direct Lightning Strike to the 24 kV Distribution Lines in Thailand

Sestasombut

Ngaopitakkul

2019

Energies

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This paper evaluates the effect of a lightning strike directly on the 24 kV distribution lines in Thailand, where such strikes are one of the main causes of power outages. The voltage across the insulator, and the arrester energy absorbed due to the lightning, need to be analyzed for different grounding distances of the overhead ground wire, ground resistance, lightning impact positions, and lightning current waveforms. Analysis and simulations are conducted using the Alternative Transients Program/Electromagnetic Transients Program (ATP/EMTP) to find the energy absorbed by the arrester and the voltages across the insulator. The results indicate that when surge arresters are not installed, the voltage across the insulator at the end of the line is approximately 1.4 times that in the middle of the line. In addition, the ground resistance and grounding distance of the overhead ground wire affect the voltage across the insulator if the overhead ground wire is struck. When surge arresters are installed, a shorter grounding distance of the overhead ground wire and a lower ground resistance are not always desirable; this is because they reduce the back-flashover rate and the voltage across the insulator if lightning strikes the overhead ground wire. However, lightning strikes to the phase conductor result in high arrester energy and the possibility that the arrester will fail. Furthermore, the tail time of the lightning waveform is a significant variable when considering the energy absorbed by the arrester, whereas the front time is important for the voltage across the insulator. In case lightning strikes directly on the connected point between the overhead lines and the underground cables, the distribution line system is protected only by the lightning arrester at the connection point. The overvoltage at the connection point is lower than the basic impulse level at 24 kV of 125 kV, but the overvoltage at the end of the cable is still more than 125 kV in case the cable is longer than 400 m. When the distribution line system is protected by the lightning arrester at both the connection point and the end of the cable, it results in overvoltage throughout the cable is lower than the critical flashover of insulation. This method is the best way to reduce the failure rate of underground cables and equipment that are connected to the distribution line system.

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Research and application of jet stream arc-quenching lightning protection gap (JSALPG) for transmission lines

Cited by 23 publications

References 12 publications

Influence of chamber structure on arc quenching in multigap system

Influence of chamber structure on arc quenching in multigap system

Insulation Coordination of Arcing Horns on HVDC Electrode Lines: Protection Performance Evaluation, Influence Factors and Improvement Method

Evaluation of a Direct Lightning Strike to the 24 kV Distribution Lines in Thailand

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