Results 21 to 30 of about 1,321 (186)

Optimized Design of Shed Parameters for Polluted Hollow Porcelain Insulators at High Altitude

IEEE Access, 2023
The pollution flashover problem of hollow insulators, one of the primary faults in substations, can be improved by optimizing the shed parameters. Combining the artificial pollution test and electric field simulation, this paper studies the optimal shed ...
Ziwei Qiu, Yong Sun, Yanjie Cui, Zhijin Zhang, Yuhao Liu, Xuye Chen, Yufan Wu, Chao Li, Lin Wang, Zhengfei Lei   +9 more
doaj   +1 more source

Wet Snow Flashover Characteristics of 500-kV AC Insulator Strings with Different Arrangements

Applied Sciences, 2019
In order to study the wet snow flashover characteristics of 500-kV AC insulator strings under different arrangements, wet snow flashover tests were carried out in the large climate chamber of China Electric Power Research Institute (CEPRI).
Jingwei Xu, Fanghui Yin, Longji Li, Qingfeng Wen, Hao Wang, Shunnan Liu, Zhidong Jia, Masoud Farzaneh   +7 more
doaj   +1 more source

Flashover Performance Test with Lightning Impulse and Simulation Analysis of Different Insulators in a 110 kV Double-Circuit Transmission Tower

Energies, 2018
The flashover performance of insulators is the foundation of the calculation of precise lightning protection. The material and structure of an insulator affect its flashover performance but the research on the differences in the flashover performance of ...
Yaqi Zhang, Licheng Li, Yongxia Han, Yaoxuan Ruan, Jie Yang, Hansheng Cai, Gang Liu, Yi Zhang, Lei Jia, Yutang Ma   +9 more
doaj   +1 more source

External Insulation Performance under DC Voltages of Polluted Post Insulators for Power Stations in Rainy Weather: A Brief Review and Recent Progress

Energies
The discharge and flashover phenomenon of post insulators in rainy weather has not been given sufficient consideration; however, with the construction of ultra-high voltage power grids, the performance of the external insulation and the ability to ...
Yuxi Dong, Zili Wang, Mingguang Diao, Xi Wang, Yu Deng, Bin Cao, Ying Xu, Chuyan Zhang   +7 more
doaj   +1 more source

AC Flashover Performance of 10 kV Rod-Plane Air-Gapped Arresters under Rain Conditions

Energies, 2018
According to operational experience of power systems, the outdoor insulation strength can be reduced due to the effect of rain. Till now, little work has been done to investigate the flashover performance of air gapped arresters under rain conditions ...
Jiazheng Lu, Pengkang Xie, Jianping Hu, Zhenglong Jiang, Zhen Fang   +4 more
doaj   +1 more source

Fire Testing and Hazard Assessment for Flame Retardant Polymer Composites

Safety Science and Technology, EarlyView.
Flame retardant polymer composites are now being evaluated with more than pass or fail flammability tests. Heat release, smoke, toxicity, and system‐level behavior are receiving more attention, and multi‐scale methods are being used to describe fire hazard under more realistic conditions.
Shuheng Wang, Min Yue, Junjie Ren, Fei Ren, Bin Zou, Xiaodong Qian, Ye‐Tang Pan, Congling Shi, Sheng Zhang   +8 more
wiley   +1 more source

DC Flashover Dynamic Model of Post Insulator under Non-Uniform Pollution between Windward and Leeward Sides

Energies, 2019
Experience shows that under unidirectional wind or certain terrain, the surface of post insulators is non-uniformly polluted between windward and leeward sides, which affects the flashover characteristics.
Zhijin Zhang, Shenghuan Yang, Xingliang Jiang, Xinhan Qiao, Yingzhu Xiang, Dongdong Zhang   +5 more
doaj   +1 more source

Polyaniline as a dual flame retardant and electrostatic dissipative additive in polyethylene nanocomposites

Journal of Vinyl and Additive Technology, Volume 31, Issue 2, Page 339-355, March 2025.
Effecft of co‐doping polyaniline with phosphoric acid and phytic acid on the heat release rate of polyethylene. Abstract Polyolefins, such as polyethylene (PE), are highly flammable and electrically insulative, limiting their applicability. The study explored the flame‐retardancy and electrical conductivity of PE/polyaniline (PE/PANI) nanocomposites ...
Akeem Adisa, Joseph K. O. Asante, Vincent O. Ojijo, António B. Mapossa, Washington Mhike   +4 more
wiley   +1 more source

Enhancing flashover strength along oil/pressboard interface using nanofluids

Alexandria Engineering Journal, 2020
One of the weakest paths for electrical discharge in power transformers is oil/pressboard interface. So, in this study it is aimed to enhance the flashover resistance of such interface through using the concept of nanofluids.
El-Sayed M. El-Refaie, Diaa-Eldin A. Mansour, M.K. Abd Elrahmen, Mohamed H. Abdo   +3 more
doaj   +1 more source

Micro Partial Discharge Characteristics of SF6 Under DC Voltage

High Voltage, EarlyView.
ABSTRACT In gas‐insulated high‐voltage direct current (HVDC) devices, micro partial discharges (PD) caused by micro‐protrusions or surface roughness on conductors or enclosures may not cause immediate insulation system failure due to their weak discharge intensity.
Geng Chen, Jie Wang, Chuanyang Li, Cong Wang, Youping Tu   +4 more
wiley   +1 more source