Results 11 to 20 of about 6,259 (210)

Space Charge Measurement and Modelling in Cross-Linked Polyethylene

Energies, 2020
Cross-linked polyethylene, commercially known as XLPE, is widely used as an insulating material in high voltage cables. However, space charge accumulation under the DC field is one of the most challenging problems in the further development of XLPE ...
Yunpeng Zhan, George Chen, Miao Hao, Lu Pu, Xuefeng Zhao, Sen Wang, Jian Liu   +6 more
doaj   +1 more source

Simulation research on space charge characteristics of zinc oxide varistor

Energy Reports, 2020
Zinc oxide (ZnO) lightning arresters have good protection performance and have been widely used in power systems. ZnO varistor is the core component of the arrester, and its electrical performance determines the overvoltage protection level of the ...
Qian Wang, Ruonan Zhang, Chenjie Ji
doaj   +1 more source

Study on the Partial Surface Discharge Process of Oil-Paper Insulated Transformer Bushing with Defective Condenser Layer

Applied Sciences, 2023
Oil-impregnated paper condenser transformer bushings are an important part of transformer equipment, and partial discharge (PD) occurred when defects exist on the condenser aluminum foil layers. Firstly, to study the PD process of the oil-paper insulated
Fan Yang, Yuchen Zhang, Xingwang Wu, Jie Wu   +3 more
doaj   +1 more source

Influence of Polarity Reversal Period and Temperature Gradient on Space Charge Evolution and Electric Field Distribution in HVDC Extruded Cable

Energies, 2022
During the operation of HVDC extruded cables, voltage polarity reversal (VPR) is considered one of the most severe conditions for cable insulation.
Yifan Zhou, Bo Gao, Wei Wang, Ke Song
doaj   +1 more source

Space Charge Accumulation Characteristics in HVDC Cable under Temperature Gradient

Energies, 2020
One of the main issues that affect the development of high-voltage direct-current (HVDC) cable insulation is the accumulation of space charge. The load operation of an HVDC cable leads to the formation of a radially distributed temperature gradient (TG ...
Yifan Zhou, Wei Wang, Tailong Guo
doaj   +1 more source

Numerical Analysis of Space Charge Behavior and Transient Electric Field under Polarity Reversal of HVDC Extruded Cable

Energies, 2020
The superimposed transient electric field generated by polarity reversal causes severe stress to the high-voltage direct current (HVDC) cable insulation.
Sun-Jin Kim, Bang-Wook Lee
doaj   +1 more source

Space Charge Accumulation at Material Interfaces in HVDC Cable Insulation Part I—Experimental Study and Charge Injection Hypothesis

Energies, 2020
On-site installation of accessories on extruded polymeric high voltage cables in a common practice. The procedure requires the shaping of the physical interface between the cable insulation surface and the pre-molded accessory body.
Espen Doedens, E. Markus Jarvid, Raphaël Guffond, Yuriy V. Serdyuk   +3 more
doaj   +1 more source

Effect of XLPE/EPDM Interface on Space Charge Behavior in Cable Accessory

IEEE Access, 2019
Space charges accumulate easily at insulation interface of cable accessories, which cause different electric field distribution and aging characteristics compared to single-layered cable.
Mingxiao Zhu, Ying Gao, Jiming Chen, Jiacai Li, Qianyu Yu, Chaolin Li   +5 more
doaj   +1 more source

Finite Element Analysis of the Breakdown Prediction for LDPE Stressed by Various Ramp Rates of DC Voltage Based on Molecular Displacement Model

Energies, 2020
Predicting the electrical breakdown of polymers is critical for certifying the endurance and lifetime of high voltage power equipment. Since various factors contribute nonlinearly to the breakdown phenomena of polymer insulators, it is difficult to ...
Minhee Kim, Su-Hun Kim, Se-Hee Lee
doaj   +1 more source

Characteristics of Surface Charge Accumulation on Direct Current GIL Insulators Under Different Dominant Mechanisms Considering Surface Trapping Effect

Shanghai Jiaotong Daxue xuebao
The existing mathematical models for charge accumulation at the gas-solid interface can hardly illustrate some microscopic mechanisms, which need improvement.
WANG Yaogang, WANG Zheming, LI Ke, JIA Bowen, YANG Hua, YAN Wu, LU Wu
doaj   +1 more source