Results 1 to 10 of about 148,911 (262)

Review of Surface Charge Accumulation on Insulators in DC Gas-Insulated Power Transmission Lines: Measurement and Suppression Measures

Energies, 2023
Gas-insulated power transmission lines (GILs) can replace cables and overhead transmission lines, playing an important role in DC transmission systems. However, the influence of surface charge accumulation on insulation reliability cannot be ignored as ...
Fangwei Liang, Hanhua Luo, Xianhao Fan, Xuetong Li, Xu Wang   +4 more
doaj   +3 more sources

The Effect of a Metal Particle on Surface Charge Accumulation Behavior of Epoxy Insulator with Zoning Coating

Energies, 2022
Epoxy insulators are widely used in Gas-Insulated Transmission Lines (GILs), playing a significant role in electrical insulation and mechanical support. The metal particles generated during the production and operation of the equipment aggravate surface ...
Wenqu Wang, Yu Gao, Huicun Zhao
doaj   +3 more sources

Charge accumulation characteristic on polymer insulator surface under AC voltage in air and C(4)F(7)N/CO(2) mixtures

High Voltage, 2020
Charge accumulation has always been a problem for the safe operation of gas insulated switchgear (GIS)/gas insulated transmission line (GIL) both under AC and DC.
Dayu Li, Guixin Zhang, Guixin Zhang, Tianyu Wang, Yicen Hou   +4 more
doaj   +3 more sources

Review of Treatments for Suppressing Surface Charge Accumulation and Enhancing Surface Flashover Voltage

CSEE Journal of Power and Energy Systems
The focus of this paper is to provide a comprehensive review of various insulation performance improvement methods for vacuum-solid and compressed air-solid interfaces.
Jixing Sun, Huili Wang, Jingquan Zheng, Zongze Li, Jindong Huo, Changwang Guo, Yifei Wang, Peng Xiao, Shakeel Akram, Dehao Qin   +9 more
doaj   +2 more sources

Temperature‐dependent adaptive conductivity coating for surface charge release and electric field control under electro‐thermal coupling field

High Voltage, 2023
Surface charge accumulation is the potential criminal for surface insulation failure on spacers under direct current (DC) voltages. The existence of thermal gradient posing the difficulty of surface charge regulation.
Jianyi Xue, Zhu Zhang, Binbin Li, Yushun Zhao, Lijian Ding   +4 more
doaj   +1 more source

Transient Surface Charge Characteristics of DC-GIL Insulator Under Thermal-Electric Coupled Fields

IEEE Access, 2022
The insulator in direct current gas-insulated transmission lines (DC-GIL) would suffer discharge risk due to surface charge accumulation under thermal-electric coupled fields.
Xiaolong Li, Songling Han, Mingde Wan, Wen Wang, Zhenxin Geng, Xin Lin   +5 more
doaj   +1 more source

Numerical simulation of surface charge inhibition performance on epoxy insulator under DC voltage by flexible coating strategy

High Voltage, 2022
Epoxy insulator is affected by surface charge accumulation under a strong electric field, which causes a decrease in the surface flashover voltage, threatening the safe operation of power equipment.
Yu Gao, Huicun Zhao, Xiaochen Yuan, Huan Wang   +3 more
doaj   +1 more source

Surface charge accumulation of post insulator: Dominant charge transition under different conditions

High Voltage, 2023
An insulator surface charge may be responsible for flashover along the insulator surface. In this study, experimental investigations of post insulator surface charge are performed using a variety of voltage, gas type, and gas pressure conditions ...
Fangwei Liang, Feng Wang, She Chen, Qiuqin Sun, Lipeng Zhong   +4 more
doaj   +1 more source

Study of Discharge Inception and Propagation in Liquid–Solid Insulation System under DC–LI Superimposed Constraints

Energies, 2022
High-voltage direct current (HVDC) links are starting to become widely implemented thanks to their interesting advantages such as reduced operation losses, the absence of reactive power, which allows energy transport via underground cables over long ...
Younes Moufakkir, Ayyoub Zouaghi, Christian Vollaire   +2 more
doaj   +1 more source

Surface Charge Properties of Epoxy Composites under DC Voltage Affected by Surface and Bulk Conductivity

Energies, 2021
As DC transmission voltage increases, the DC wall bushing becomes longer, and a supporting insulator is introduced to keep the conductor straight. Under extremely high electric fields coupled with a thermal gradient, the surface charge of the supporting ...
Qian Wang, Xidong Liang, Ke Chen, Chao Wu, Shan Liu   +4 more
doaj   +1 more source