Results 1 to 10 of about 501,678 (300)

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   +2 more sources

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   +1 more source

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

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   +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

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

Effects of volume and surface conductivity on the surface charge and electric field characteristics of the tri‐post insulator in SF6‐filled ± 500 kV DC‐GIL

IET Generation, Transmission & Distribution, 2023
Herein, the surface charge characteristics of a tri‐post insulator in a ± 500 kV direct current gas‐insulated transmission lines (DC‐GIL) filled with SF6 are thoroughly studied.
Xiaolong Li, Guangkuo Zhang, Chen Cao, Yan Shi, Jie Li, Wenzhi Chang   +5 more
doaj   +1 more source

Universality of electron accumulation at wurtzite c- and a-plane and zinc-blende InN surfaces [PDF]

, 2007
Electron accumulation is found to occur at the surface of wurtzite (112¯0), (0001), and (0001¯) and zinc-blende (001) InN using x-ray photoemission spectroscopy. The accumulation is shown to be a universal feature of InN surfaces.
C. F. McConville, D. J. As, D. Muto, F. Bechstedt, F. Fuchs, H. Naoi, Hai Lu, J. Furthmüller, J. Schörmann, K. Lischka, Lu H., P. D. C. King, P. Schley, R. Goldhahn, T. D. Veal, W. J. Schaff, Y. Nanishi   +16 more
core   +2 more sources