Results 1 to 10 of about 4,641,442 (292)

Influence of frequency on the surface discharge characteristics of PEEK under positive repetitive square voltage

High Voltage, 2020
In this study, the surface discharge current pulses of polyetheretherketone (PEEK) material under positive repetitive square voltage in a nitrogen atmosphere are measured.
Zhuodong Yang, Xuebao Li, Xiangrui Meng, Xiangrui Meng, Zhibin Zhao, Pengyu Fu, Bin Zhai, Bin Zhai, Xiang Cui   +8 more
doaj   +1 more source

Roughness Evolution and Charging in Plasma-Based Surface Engineering of Polymeric Substrates: The Effects of Ion Reflection and Secondary Electron Emission

Micromachines, 2018
The interaction of plasma with polymeric substrates generates both roughness and charging on the surface of the substrates. This work, toward the comprehension and, finally, the control of plasma-induced surface roughness, delves into the intertwined ...
George Memos, Elefterios Lidorikis, George Kokkoris   +2 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

Electrical discharge resistance of polymeric nanocomposites

IET Nanodielectrics, 2021
The trend of choosing insulating materials has changed in the past few decades, and a considerable shift has occurred from conventional ceramic to non‐ceramic insulating materials.
Srijib Banerjee, Shelly Saini, Shakthi Prasad D   +2 more
doaj   +1 more source

Influence of moisture on the interface charge of oil–pressboard composite insulation under DC voltage

High Voltage, 2018
The distortion of the electric field in the oil–pressboard composite insulation caused by the accumulation of the interface charge is detrimental to both the insulation design and operation of converter transformers.
Bo Qi, Yanqiu Jiao, Chunjia Gao, Shuqi Zhang, Xiaolin Zhao, Chengrong Li   +5 more
doaj   +1 more source

Charge accumulation characteristic on polymer insulator surface under AC voltage in air and C(4)F(7)N/CO(2) mixtures

High Voltage, 2020
Charge accumulation has always been a problem for the safe operation of gas insulated switchgear (GIS)/gas insulated transmission line (GIL) both under AC and DC.
Dayu Li, Guixin Zhang, Guixin Zhang, Tianyu Wang, Yicen Hou   +4 more
doaj   +1 more source

Improvement of partial discharge resistance of polypropylene under AC voltage by blending elastomer

IET Science, Measurement & Technology, 2023
This paper reports on the partial discharge (PD) erosion characteristics of polypropylene (PP)/elastomer blends where ethylene‐octene copolymer elastomer (EOC) and propylene‐based elastomer are involved.
Yu Gao, Jinjing Peng, Jing Li, Zheng Song, Xuri Xu, Tao Han, Meng Xiao   +6 more
doaj   +1 more source

Precise Burden Charging Operation During Iron-Making Process in Blast Furnace

IEEE Access, 2021
The burden charging operation in blast furnace is one of the most important operations during iron-making process. In this paper, we focus on the study of precise burden charging operation, which involves two aspects: How to obtain and form the optimal ...
Haigang Zhang, Shaolun Sun, Sen Zhang
doaj   +1 more source

X-ray-induced piezoresponse during X-ray photon correlation spectroscopy of PbMg1/3Nb2/3O3

Journal of Synchrotron Radiation
X-ray photon correlation spectroscopy (XPCS) holds strong promise for observing atomic-scale dynamics in materials, both at equilibrium and during non-equilibrium transitions.
Dina Sheyfer, Hao Zheng, Matthew Krogstad, Carol Thompson, Hoydoo You, Jeffrey A. Eastman, Yuzi Liu, Bi-Xia Wang, Zuo-Guang Ye, Stephan Rosenkranz, Daniel Phelan, Eric M. Dufresne, G. Brian Stephenson, Yue Cao   +13 more
doaj   +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, Ju Tang, Cheng Pan, Zijun Pan, Yi Li, Zhaolun Cui, Zhaolun Cui   +7 more
doaj   +1 more source