Temperature Dependence of Surface Charge Accumulation on DC-GIS Insulating Spacer

Shimakawa, Hajime; Sato, Masahiro; Kumada, Akiko; Hidaka, Kunihiko; Yasuoka, Tadashi; Hoshina, Yoshikazu; Shiiki, Motoharu

doi:10.1109/tpwrd.2022.3150767

Cited by 11 publications

(2 citation statements)

References 22 publications

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“…the increased positive charge density, while the increased surface conductivity suppressed charge speckles. Kumada et al [89] investigated in detail the spatial evolution characteristics of charge distribution over 3000 h under different temperatures. They proposed that not only increased volume current but also charge trapping in materials led to the enhancement of surface charge density at higher temperatures.…”

Section: Surface Charge Accumulation Patternsmentioning

confidence: 99%

Insight into charge-induced flashover at the gas–solid interface in DC gas-insulated systems

Zhang,

Li,

Min

et al. 2023

J. Phys. D: Appl. Phys.

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The proliferation of urbanization and the integration of new energy sources have stimulated the development of gas-insulated transmission lines and switchgear (GIL/GIS). In particular, the compact DC GIS in offshore converter platforms will significantly reduce footprints for DC switchyards, exhibit exceptional climatic resistance, and facilitate the cost-effective connection of remote offshore wind farms and submarine links. Nevertheless, insulators used in GIS/GIL always suffer from surface charge accumulation under DC stress, which could distort and enhance the local electric field and thus trigger a flashover at the gas-solid interface if it exceeds certain magnitude levels. This susceptibility becomes a major concern affecting the reliability of DC gas-insulated systems. Beyond these engineering-related challenges lie fundamental physics problems involving mechanisms of charge accumulation and charge-induced flashover which still require exploration. To this end, this paper presents an overview of recent advancements on this topic whilst highlighting relevant issues to be addressed. Specifically, the surface charge accumulation phenomena under DC fields are reviewed, and the charging mechanisms are summarized from macroscopic to microscopic perspectives. Further, the correlation between surface charge and surface flashover is discussed. Moreover, recent developments in tailoring methods for surface charging are also presented. Finally, perspectives are given on current research progress and future needs.

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Section: Surface Charge Accumulation Patternsmentioning

confidence: 99%

Insight into charge-induced flashover at the gas–solid interface in DC gas-insulated systems

Zhang,

Li,

Min

et al. 2023

J. Phys. D: Appl. Phys.

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“…High voltage DC GIS is subjected to voltage stress for a long-time during operation, and the insulation problem has been the bottleneck restricting its wide application [3][4] . At present, scholars have carried out a lot of research on the accumulation and distribution of space charge in DC GIS, the movement and suppression of metal particles, the distribution and optimization of the electric field, and the flashover and breakdown characteristics of insulating gas [5][6][7][8][9][10][11] . These studies mainly explore ways to improve the insulation performance of DC GIS from the perspective of DC GIS structure or insulation materials.…”

Section: Introductionmentioning

confidence: 99%

Overvoltage stress of ±550 kV DC GIS for converter station

Zheng,

Fan,

Sun

et al. 2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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DC gas-insulated switchgear (GIS) can significantly reduce the floor area and construction and maintenance costs of traditional DC converter stations and has a good development prospect. Based on the typical converter station topology and arrester configuration scheme, this paper sets different fault conditions to assess the overvoltage stress of ±550 kV DC GIS. The simulation results show that the DC GIS will bear the highest transient overvoltage, up to 874.9 kV, when the converter station starts with an open circuit fault at the inverter side. The insulation level of DC GIS is further proposed, in which the lightning impulse withstand level (LIWL) is 1356 kV and the switching impulse withstand level (SIWL) is 1110 kV. The research results can provide a reference for the insulation design and equipment development of high voltage DC GIS.

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Simulation and Analysis of Charge Distribution and Capacitance Effect on Uneven Surface of Dielectric with Leakage Current

Ding,

Zhuang,

et al. 2024

Lecture Notes in Electrical Engineering

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Temperature Dependence of Surface Charge Accumulation on DC-GIS Insulating Spacer

Cited by 11 publications

References 22 publications

Insight into charge-induced flashover at the gas–solid interface in DC gas-insulated systems

Insight into charge-induced flashover at the gas–solid interface in DC gas-insulated systems

Overvoltage stress of ±550 kV DC GIS for converter station

Simulation and Analysis of Charge Distribution and Capacitance Effect on Uneven Surface of Dielectric with Leakage Current

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