Results 31 to 40 of about 2,602,019 (170)

The influence of magnetite nano particles on the behavior of insulating oils for pulse power applications [PDF]

, 2011
The effects of the addition of magnetite nanoparticles on the breakdown strength of three insulating liquids have been examined. The liquids considered are: a mineral transformer oil; a synthetic ester liquid, Midel 7131, and a specialist high ...
Given, M, Lehr, J.M., Mcglone, Phillip, Wilson, Mark, Wang, Tao, Macgregor, Scott, Timoshkin, Igor   +6 more
core   +4 more sources

Investigation on Charge Transport in Polypropylene Film under High Electric Field by Experiments and Simulation

Energies, 2021
The charge transport in polypropylene was studied under DC electric fields at different temperatures. By the experimental measurement and simulation of the BCT model, we studied conduction currents, breakdown strength, and space charge distribution.
Xiying Dai, Fuqiang Tian, Fei Li, Shuting Zhang, Zhaoliang Xing, Jinbo Wu   +5 more
doaj   +1 more source

Breakdown Voltage and Its Influencing Factors of Thermally Aged Oil-Impregnated Paper at Pulsating DC Voltage

Energies, 2017
Breakdown strength is an important electrical property of insulating paper. Oil-impregnated paper of various aging states was prepared. Its breakdown voltage was then measured at pulsating direct current (DC) voltage with various ripple factors, and ...
Jing Zhang, Feipeng Wang, Jian Li, Hehuan Ran, Xudong Li, Qiang Fu   +5 more
doaj   +1 more source

Effects of Fiber and Copper Particles on Conductivity and Breakdown Characteristics of Natural Ester and Mineral Oil under DC Voltage

Energies, 2020
The converter transformer is a key equipment in high voltage direct current (HVDC) transmission system. Its oil-paper insulation system in the valve winding and outlet bushing experiences AC, DC, AC/DC, and transient impulse voltages simultaneously.
Lin Cheng, Yi Jiang, Min Dan, Hao Wen, Yanqing Li, Wei Qin, Jian Hao   +6 more
doaj   +1 more source

Dielectric behaviours of bio‐derived epoxy resins from cashew nutshell liquid

High Voltage, 2021
In this study, four commercially available bio‐derived epoxy systems (extracted from cashew nutshell liquid) were prepared and characterised. The glass transition temperature (T g), dielectric spectroscopy, DC conductivity and breakdown properties of ...
Mulan Mu, Alun Vaughan
doaj   +1 more source

Design of ultrabright 270 keV DC photoelectron gun for ultrafast electron diffraction

AIP Advances, 2020
Compact DC photoelectron guns of high-voltage are highly desired to output ultrabright and ultrashort electron pulses for accessing irreversible processes by using the ultrafast electron diffraction (UED) technique.
Jing Yang, Yuying Yu, Yingpeng Qi, Jianbo Hu   +3 more
doaj   +1 more source

Nonlinear electric conduction of CCTO/EPDM composites used for reinforced insulation in cable accessory

Frontiers in Energy Research, 2023
Nonlinear electric conductance of reinforced insulation can homogenize electric field distribution and suppress local electric field distortion inside high-voltage direct current cable accessories.
Zhongyuan Li, Jian Zhang, Shiyu Chen, Heqian Liu, Lei Wang, Jianquan Liang, Kexin Zhang, Peng Zhang, Weifeng Sun   +8 more
doaj   +1 more source

AC/DC Superimposed Breakdown Characteristics and Electric Field Simulation Analysis of Oil-Paper Insulation in Converter Transformers

EAI Endorsed Transactions on Energy Web
This study investigates the electric field distribution and breakdown characteristics of oil-paper insulation in a 500 kV converter transformer under AC/DC superimposed voltages. The electric field distribution within the winding end insulation structure
Xiaofan Huang, Jun Yan, Aiqiang Pan, Yufan Zhang   +3 more
doaj   +1 more source

Trap Distribution and Dielectric Breakdown of Isotactic Polypropylene/Propylene Based Elastomer With Improved Flexibility for DC Cable Insulation

IEEE Access, 2018
In this paper, we report on electrical and mechanical properties of isotactic polypropylene (PP) blended with polyolefin elastomer (POE) and propylene-based elastomer (PBE).
Yu Gao, Jing Li, Yanqiu Yuan, Shihao Huang, Boxue Du   +4 more
doaj   +1 more source

Octavinyl polyhedral oligomeric silsesquioxane on tailoring the DC electrical characteristics of polypropylene

High Voltage, 2022
This work reports the effect of octavinyl polyhedral oligomeric silsesquioxane (OvPOSS) on tuning the electrical performance of polypropylene (PP). OvPOSS with different content are introduced into PP using the solution method.
Xiaosi Lin, Wah Hoon Siew, John Liggat, Martin Given, Jinliang He   +4 more
doaj   +1 more source