Results 71 to 80 of about 772,396 (130)

Effect of AC Pre-Charging of Epoxy Insulator on Flashover Properties in Eco-Friendly Binary Gas Mixtures

Energies
Metal particles and surface charge accumulation are considered the key factors that could trigger unexpected flashovers of insulators equipped in gas-insulated switchgear (GIS).
Jian Guan, Guohui Han, Qifeng Shang, Xiaohu Qi, Zhiying Wang, Yu Gao   +5 more
doaj   +1 more source

Forecasting Flashover Parameters of Polymeric Insulators under Contaminated Conditions Using the Machine Learning Technique

Energies, 2020
There is a vital need to understand the flashover process of polymeric insulators for safe and reliable power system operation. This paper provides a rigorous investigation of forecasting the flashover parameters of High Temperature Vulcanized (HTV ...
Arshad, Jawad Ahmad, Ahsen Tahir, Brian G. Stewart, Azam Nekahi   +4 more
doaj   +1 more source

Study on Raindrop Dynamic Behaviour and Its Impact on Insulator Flashover Characteristics Under Airflow Synergy

High Voltage, EarlyView.
ABSTRACT The synergistic effect of airflow on rainfall behaviour significantly impacts the flashover probability of insulators. This study combines experiments and simulations to investigate the influence of raindrop dynamic behaviour, shed structures and rainfall conditions on flashover characteristics under airflow conditions.
Keqi Huang, Xueqin Zhang, Song Xiao, Lirui Zhang, Yujun Guo, Guangning Wu   +5 more
wiley   +1 more source

Model for polluted insulator flashover under AC or DC voltage

, 2018
International audienceThe aim of this paper is to elaborate a model describing the different phases of flashover of high voltage insulators with continuous or discontinuous pollution deposits, in AC or DC. This model uses an equivalent electrical circuit.
Madjoudj, D., M. Teguar, A. Mekhaldi, Teguar, M., D. Madjoudj, Mekhaldi, A., A. Beroual, Chihani, T., T. Chihani, Beroual, Abderrahmane   +9 more
core   +1 more source

Nonlinear Conductive Materials for Adaptive Electric Overstress Control: Theory, Tailoring and Applications

High Voltage, EarlyView.
ABSTRACT Artificial intelligence computing, renewable energy integration and transportation electrification are driving electrical and electronic equipment towards higher power densities, higher voltage ratings and greater miniaturisation. Under these trends, insulation systems have become a key bottleneck for reliability and compactness.
Zhiwen Huang, Xianrui Jiang, Gang Sun, Juntong Zong, Ya Sun, Jun Hu, Jinliang He   +6 more
wiley   +1 more source

Lightning Overvoltage Protection Technologies for High‐Speed Railway Traction Power Supply Systems: Current Status and Future Prospects

High Voltage, EarlyView.
ABSTRACT The traction power supply system of high‐speed railways is exposed to complex lightning environments over the long term. Overvoltage generated by direct lightning or induced lightning can propagate along the overhead contact line, traction substations, onboard high‐voltage system and mobile grounding system, thereby threatening equipment ...
Guangning Wu, Yihan Fan, Ye Cao, Xinbo Lv, Yujun Guo, Song Xiao, Huazhi Zhang, Jun Hu, Baoguo Wang, Guoqiang Gao   +9 more
wiley   +1 more source

Dynamic analysis of flashover in high voltage DC polluted insulator

, 1992
The actual voltage growing in electrical power systems make the insulation studies, very important. In this, one of the principal problems is the development of discharges in surface polluted high tension insulators.
Astorga, Oscar A. Maldonado [UNESP], Filho, Jose Pissolato, O.A. Maldonado Astorga, J. Pissolato Filho   +3 more
core   +1 more source

Research Progress on Electrical Insulation Under Superimposed Voltage With High‐Frequency Harmonics in New‐Type Power Systems

High Voltage, EarlyView.
ABSTRACT A new‐type power system serves as a critical technical support for the integration of new energy, and its secure and stable operation is of great importance. However, the extensive utilisation of power electronic devices leads to power equipment insulation being subjected to electrical stresses of high‐frequency harmonics, which can easily ...
Shengtao Li, Chuang Zhang, Weiwang Wang, Yuanwei Zhu, Liuqing Yang   +4 more
wiley   +1 more source

Influence of non uniformity of pollution thickness on insulator flashover under impulse voltage

, 2010
International audienceThis paper is aimed at the influence of the linear non uniformity of pollution layer on critical flashover voltage Vcri of polluted insulator under lightning impulse voltage.
M. El-A. Slama, Hadi, H., A. Beroual, H. Hadi, Slama, Mohammed El Amine, Beroual, Abderrahmane   +5 more
core   +1 more source

Advances in Polymeric Insulating Materials: Global Progress in These 10 Years

High Voltage, EarlyView.
ABSTRACT This journal, High Voltage, celebrates its 10th anniversary in 2026. To commemorate this significant milestone, this comprehensive special review article showcases the latest global research progress and cutting‐edge advancements in polymeric insulating materials, a critical component that underpins high‐voltage systems and is vital to modern ...
Yoshimichi Ohki, George Chen, Davide Fabiani, Reimund Gerhard, Mona Ghassemi, Stanislaw Gubanski, Shengtao Li, Ronald Plath, Roger Schurch, Yuriy Serdyuk, Gilbert Teyssedre   +10 more
wiley   +1 more source