Results 181 to 190 of about 7,176,145 (231)

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

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

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

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

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, Han-chi Zhang, W. Qin, Cheng-Rong Li, Chao Yan   +6 more
semanticscholar   +1 more source

JOSÉ MARÍA GIL-ROBLES GIL-DELGADO

2021
  +5 more sources

Effects of surface conductivity on surface charging behavior of DC-GIL spacers

IEEE transactions on dielectrics and electrical insulation, 2020
In this study, a simulation model is established to study the effect of surface conductivity on the accumulation of surface charge. The simulation shows that hetero-charges increase on areas away from the high voltage electrode and the electric field ...
Junhong Chen, Jianyi Xue, Junhao Dong, Yuan Li, Jun-bo Deng, Guanjun Zhang   +5 more
semanticscholar   +1 more source

Electrical field distribution along SG6/N2 filled DC-GIS/GIL epoxy spacer

IEEE transactions on dielectrics and electrical insulation, 2018
The flashover faults due to the accumulation of surface charge have restricted the further development of spacers in HVDC GIS/GIL transmission systems.
B. Du, H. C. Liang, J. Li, Z. Ran
semanticscholar   +1 more source

Dependent Competing Failure Modeling for the GIL Subject to Partial Discharge and Air Leakage With Random Degradation Initiation Time

IEEE Transactions on Reliability, 2019
Confronted with the ever-growing demand for electricity delivery over long distances, the gas insulated transmission line (GIL), as an advanced underground technology, has been under rapid development recently.
Songhua Hao, Jun Yang
semanticscholar   +1 more source

Improved Method for Acoustic Identification of Free Conductive Particle Defects in GIL

IEEE Transactions on Power Delivery, 2019
The presence of free conductive particles in gas-insulated transmission lines (GIL) is the most significant threat to their insulation. The non-invasive identification of free conductive particle defects in GILs is extremely challenging.
Zhicheng Wu, Qiaogen Zhang, Jiajie Song, Xiaoang Li   +3 more
semanticscholar   +1 more source