Results 291 to 300 of about 6,266,802 (357)

Charge interaction behaviors at interfacial domains in DC GIL insulators

Applied Physics Letters
Long-term operation of high voltage direct current at elevated temperatures can result in the accumulation of surface charges in DC gas-insulated transmission line (GIL) insulators.
Xi Pang, Zongliang Xie, Gengsheng Xie, Peng Liu, Qingyu Wang, Zongren Peng, He Li   +6 more
semanticscholar   +1 more source

Efficiency Analysis of Particle Trapping for ±320-kV GIL

IEEE transactions on dielectrics and electrical insulation
If metal particles move to the surface of the spacer in a dc gas-insulated line, they will distort the original electric field, increasing the instability of gas-insulated transmission line (GIL) during long-term operation.
Weijian Zhuang, Fangwei Liang, Zuodong Liang, Changhong Zhang, Chuanyang Li, Bo Zhang, Jinliang He   +6 more
semanticscholar   +1 more source

Dynamics of surface charge and electric field distributions on basin‐type insulator in GIS/GIL due to voltage polarity reversal

High Voltage, 2020
In this study, a simulation model of surface charge accumulation has been established. The model considers three accumulation ways, i.e. electrical conduction within the gas, through insulator volume and along the insulator surface.
Yi Luo, Ju Tang, C. Pan, Zijun Pan, Yi Li, Zhaolun Cui   +5 more
semanticscholar   +1 more source

JOSÉ MARÍA GIL-ROBLES GIL-DELGADO:

2021
  +6 more sources

Conductor Surface Roughness-dependent Gas Conduction Process for HVDC GIL—Part II: Experiment

IEEE transactions on dielectrics and electrical insulation, 2021
In this paper, an electric field ranging from 0.44-5.24 kV/mm was applied to a gas-insulated line (GIL) model filled with SF6 at different values of gas pressure and relative humidity (RH).
Chuanyang Li, Lei Zhang, Ya Wang, Di Yu, Zheming Wang, Zhousheng Zhang, Liam Connelly, Chuanjie Lin, Geng Chen, G. Mazzanti, Yuxiao Zhang, Malte Tschentscher   +11 more
semanticscholar   +1 more source

Electric field regulation and parameter optimization of surface nonlinear conductivity spacer for 500 kV DC-GIL

IEEE transactions on dielectrics and electrical insulation, 2020
In this paper, the surface nonlinear conductivity (SNC) spacer is proposed to regulate the electric field in a 500 kV DC-GIL, whose effects are verified by assigning a temperature gradient, a rough electrode, a metal particle and a polarity reversal ...
H. C. Liang, B. Du, J. Li
semanticscholar   +1 more source

The influence of surface charge accumulation on flashover voltage of GIS/GIL basin insulator under various voltage stresses

International Journal of Electrical Power & Energy Systems, 2019
Under AC, DC and switching impulse voltages, the surface charges accumulated on the basin insulators of Gas Insulated Substation (GIS) or Gas Insulated Metal Enclosed Transmission Line (GIL) could distort local electric field and even reduce the surface ...
B. Qi, C. Gao, Chengrong Li, Jun Xiong
semanticscholar   +1 more source

Mechanical Stress Distribution and Reliability Analysis of GIL Tri-post Insulator

International Conference on Electrical Materials and Power Equipment, 2021
Tri-post insulator is the key insulation component of UHV and EHV gas insulated transmission pipeline (GIL), and its mechanical reliability is directly related to the operation safety of GIL.
Songtao Liu, Jin Li, B. Du, Hucheng Liang, L. Hao, Yaxiang Wang   +5 more
semanticscholar   +1 more source

Prediction and analysis of replaceable scraper wear of slurry shield TBM in dense sandy ground: A case study of Sutong GIL Yangtze River Crossing Cable Tunnel

, 2020
Prediction and analysis of cutting tool wear in dense sandy ground is important for improving the working performance of slurry shield TBM, especially for long-distance cross-river tunnel. Appropriate prognosis model can not only improve the construction
Tang Shaohui, Xiao-Ping Zhang, Quansheng Liu, Chen Peng, Sun Xutao, Lei Sun, Yang Dai, Songjie Chen   +7 more
semanticscholar   +1 more source

High-Resolution Temperature Distribution Measurement of GIL Spacer Based on OFDR and Ultraweak FBGs

IEEE Transactions on Instrumentation and Measurement, 2020
The temperature distribution on the gas-insulated line (GIL) spacer affects surface charge accumulation. However, the spacer temperature distribution is hard to measure because the conventional electric sensors are large dimensions, hard to multiplex ...
G. Ma, Hong-yang Zhou, Yabo Li, Hanchi Zhang, W. Qin, Cheng-Rong Li, Chao Yan   +6 more
semanticscholar   +1 more source