Results 61 to 70 of about 4,473,292 (172)

Study on the dc flashover performance of standard suspension insulator with ring-shaped non-uniform pollution

High Voltage, 2018
Under dc electric field, pollution may be more easily deposited around insulator string caps and pins, distributing non-uniformly on its inner and outer parts, and presenting ring-like shape.
Zhijin Zhang, Jiayao Zhao, Dongdong Zhang, Xingliang Jiang, Yongfu Li, Bin Wu, Jian Wu   +6 more
doaj   +1 more source

The effect of dynamic behaviours of the water droplet on DC/AC flashover performance on silicone rubber surface: Experiment, simulation and theoretical analysis

High Voltage, 2021
It is usually seen that DC flashover voltage of the water droplet on the surface of silicone rubber (SIR) composite insulator is lower than AC flashover voltage.
Wen Cao, Hao Xue, Wei Shen, Hao Yang, Long Zhao, Yang Wang   +5 more
doaj   +1 more source

Application Status and Development Trends of DC Ice‐Melting Devices in China's Power Grid

IET Smart Energy Systems, EarlyView.
This paper summarises the development history and engineering application status of DC ice‐melting devices (DCIMD) in China, analyses the principles, advantages, disadvantages and adaptability of mainstream topologies and discusses the key problems and corresponding improvement directions.
Ming Lei, Tianlong Zhang, Zhenglin Li, Jian Wang, Tao Zhang, Peng Wang, Ruiqi Zhan   +6 more
wiley   +1 more source

Surface flashover in 50 years: II. Material modification, structure optimisation, and characteristics enhancement

High Voltage
Surface flashover is a gas–solid interface insulation failure that significantly jeopardises the secure operation of advanced electronic, electrical, and spacecraft applications.
Zhen Li, Ji Liu, Yoshimichi Ohki, George Chen, Shengtao Li   +4 more
doaj   +1 more source

The Shed Hole Influence on the Electrical Performance of Composite Insulator

IEEE Access, 2020
In recent years, shed holes appeared on the surface of in-service composite insulators have been observed in transmission lines in the southern and middle regions of China.
Fanghui Yin, Pingyuan Liu, Hongwei Mei, Liming Wang, Licheng Li, Masoud Farzaneh   +5 more
doaj   +1 more source

Micro Partial Discharge Characteristics of SF6 Under DC Voltage

High Voltage, Volume 11, Issue 4, Page 1058-1067, August 2026.
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

Research on the Online Diagnosis Method for Heating Types of Composite Insulator

High Voltage, Volume 11, Issue 4, Page 1040-1047, August 2026.
ABSTRACT In response to the current challenge of accurately determining the specific heating status of composite insulators with localised temperature rise using infrared detection technology, this paper proposes a novel diagnostic method. This method involves applying a disturbance to monitor the surface temperature rise data of composite insulators ...
Hongwei Mei, Hongjiao Jiang, Senlin Liao, Chao Zhou, Hao Shen, Hui Liu, Xiaobo Meng, Liming Wang   +7 more
wiley   +1 more source

The effect of microstructure on vacuum surface flashover [PDF]

The vacuum discharge along the dielectric surface, also called surface flashover, brings significant damages to the vacuum-solid insulation system. Here we implement shape-flexible, complex surface groove microstructures on the dielectric to mitigate the
Mu, Haibao, Zhang, Guanjun, Cheng, Yanlin, Song, Falun, Sun, Guangyu, Zhang, Shu, Huang, Kun   +6 more
core   +1 more source

Effect of electron beam irradiation on surface molecule and flashover voltage of epoxy composites

High Voltage
The unsatisfactory insulating properties of solid–gas interfaces seriously restrict the development of high‐voltage electrical equipment and threaten their power supply stability.
Mingru Li, Huan Niu, Kai Shang, Jianyu Lang, Yafang Gao, Bingnan Li, Jiuhui Zhao, Zhen Li, Yang Feng, Shengtao Li   +9 more
doaj   +1 more source

Temperature-Dependent Surface Charge and Flashover Behaviors of Oil-Paper Insulation Under Impulse With Superimposed DC Voltage

IEEE Access, 2018
Oil-paper insulation will inevitably endure impulse voltage with a superimposed dc voltage (superimposed voltage) because of introduced lightning or switching, which can induce charge accumulation and trigger flashover during the operation of a converter
Boxue Du, Rui Chang, Jinpeng Jiang, Jin Li   +3 more
doaj   +1 more source