Results 31 to 40 of about 17,353,436 (262)

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

An investigation using cultured human cell lines, of the involvement of vanadium, cation transport and phosphatidylinositol in the aetiology of bipolar manic-depressive psychosis [PDF]

, 2015
The symptoms, classification, occurrence and possible aetiologies of bipolar manic-depressive psychosis have been reviewed, with particular emphasis on the possible role of the vanadate ion (V5+) and cation transport in the illness.
Banks, Rosamonde Elizabeth, Naylor, Graham   +1 more
core   +2 more sources

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

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

Transport phenomena in bipolar semiconductors: a new point of view [PDF]

, 2005
In previous work it has been shown that the traditional approach to transport phenomena in bipolar semiconductors is inconsistent. In particular, the effect of non-equilibrium charge carriers and appropriate boundary conditions are not considered in the ...
Ortiza, A., Giraldod, J., Gutie´rrezd, A., Volovichevc, I.N., Logvinovb, G.N., Titova, O.Yu., Gurevicha, Yu.G.   +6 more
core   +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

Evaluation of Electric Field and Space Charge Dynamics in Dielectric under DC Voltage with Superimposed Switching Impulse

Energies, 2019
The influx of a switching impulse during DC steady-state operations causes severe electrical stress on the insulation of HVDC cables. Thus, the insulation should be designed to withstand a superimposed switching impulse.
Ik-Soo Kwon, Sun-Jin Kim, Mansoor Asif, Bang-Wook Lee   +3 more
doaj   +1 more source

A Modified Algorithm for the Simulation of Charge Behavior in Water Tree Aged Cross-Linked Polyethylene Cable

IEEE Access, 2018
In this paper, a modified algorithm is introduced to explain the process of charge formation in water tree aged cable insulation with respect to the dielectric properties of water tree areas and the cylindrical geometries of cable insulation.
Yu Zhang, Deyuan Liu, Jiandong Wu, Yi Yin   +3 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