Results 11 to 20 of about 68,866 (316)

On‐load tap‐changer fault mode recognition based on the singular value of Hilbert energy spectrum time‐frequency matrix and spectrum entropy

IET Generation, Transmission & Distribution, 2022
To solve the difficulty of eigenvalue extraction of on‐load tap‐changer (OLTC) vibration signals, an eigenvalue extraction method of time‐frequency matrix based on Hilbert energy spectrum and spectral entropy is proposed in this study.
Jianghai Geng, Zikang Zhang, Xinyu Wang, Shuguo Gao, Ping Wang   +4 more
doaj   +1 more source

Effect of DC Pre-stress on Space Charge and Electrical Tree in XLPE with Needle-Plate Electrodes

Zhongguo dianli, 2021
Space charge is one of the main factors that affect the electrical tree characteristics of HVDC cable insulation. Based on the bipolar charge transport model, this paper simulates the space charge distribution characteristics of the two-dimensional ...
Xiaobin XU, Aijing LIU, Yanjie LE, Hechen LIU, Zhanpeng GUO, Yunpeng LIU   +5 more
doaj   +1 more source

Molecular Dynamics Simulation for the Effect of Fluorinated Graphene Oxide Layer Spacing on the Thermal and Mechanical Properties of Fluorinated Epoxy Resin

Nanomaterials, 2021
Traditional epoxy resin (EP) materials have difficulty to meet the performance requirements in the increasingly complex operating environment of the electrical and electronic industry. Therefore, it is necessary to study the design and development of new
Qijun Duan, Jun Xie, Guowei Xia, Chaoxuan Xiao, Xinyu Yang, Qing Xie, Zhengyong Huang   +6 more
doaj   +1 more source

Insulation Performance and Simulation Analysis of SiO₂-Aramid Paper under High-Voltage Bushing

Nanomaterials, 2022
The long-term safe and stable operation of oil-impregnated paper (OIP) bushings is of great significance to the operation of power systems. With the growth of OIP bushing, its internal insulation will gradually decay.
Bowen Liu, Fangcheng Lv, Xiaozhou Fan, Hai Xiao, Hanwen Bi   +4 more
doaj   +1 more source

Wireless Electrical Power Transmission

International Journal of Computer Applications, 2010
Sandip B. Shrote E & Tc Deptt. SGREFS, COEM, Ahmednagar Vrushali P. Wani Elex Deptt SGREFS, COEM Ahmednagar This technology power can be transferred through this free space by microwave. The wireless power transmission by focus the electromagnetic beam of microwave or laser radiation is most modern type of power engineering for different places in ...
Dhananjay E. Upasani, Sandip B. Shrote, Vrushali P. Wani   +2 more
openaire   +1 more source

Simulation of Influence of DC Pre-Stress on Space-Charge Characteristics of Cross-Linked Polyethylene in Inhomogeneous Field

IEEE Access, 2020
Space charge is one of the main causes of electrical tree initiation in high-voltage cable insulation. To investigate the influence of DC pre-stress on the space-charge distribution of cross-linked polyethylene (XLPE), a two-dimensional needle-plate ...
Hechen Liu, Xiaobin Xu, Yun-Peng Liu, Shaoxin Meng, Zhanpeng Guo, Mingjia Zhang   +5 more
doaj   +1 more source

Voltage Stability Control Based on Angular Indexes from Stationary Analysis

Energies, 2022
This paper presents a novel methodology for the calculation of angular indexes of an electrical system from stationary analysis, using load flow and nose curves (P–V) in each of the buses of the system to perform control actions and preserve or improve ...
Gabriel J. Lopez, Jorge W. González, Idi A. Isaac, Hugo A. Cardona, Oscar H. Vasco   +4 more
doaj   +1 more source

Electric Transmission of Power [PDF]

Nature, 1891
YOUR article of the 1st inst. on the International Electrical Exhibition (p. 522), says: “In those days (before 1879) two wrong notions misled people—the one, that the maximum efficiency of a perfect electromotor could be only 50 per cent.; the other, quoting the remarks of Sir W.
openaire   +1 more source

Artificial Intelligence in Cable Fault Detection and Localization: Recent Advances and Research Challenges

Energies
With the large-scale integration of new power systems and distributed generators (DGs), cable fault detection and localization face numerous challenges, where artificial intelligence (AI) techniques demonstrate significant advantages.
Qianqiu Shao, Songhai Fan, Zongxi Zhang, Fenglian Liu, Zhengzheng Fu, Pinlei Lv, Zhou Mu   +6 more
doaj   +1 more source

The Safety Monitoring and Warning System for Live Working Based on ToF Technology

Zhongguo dianli, 2020
Aiming at the deficiency of security monitoring and early warning means and methods for live working in China, a ToF (Time of flight)-based real-time safety monitoring and warning system is proposed for live working.
Wen LI, Su GU, Zhigang WANG, Chenmeng ZHOU, Dun MAO, Li ZHENG   +5 more
doaj   +1 more source