Results 111 to 120 of about 3,012,816 (257)

Evaluation Methodology, Numerical Verification and Retrofilling Procedure for Power Transformers to Ensure K‐Class Flame Retardancy and Environmentally Friendly

High Voltage, EarlyView.
ABSTRACT With increasing demands for fire safety and environmental friendliness, retrofilling transformers with alternative insulating liquids has become a growing trend. However, retrofilling power transformers remains uncertain, as more residual mineral oil compromises K‐class flame retardancy, and its impact on environmental performance has yet to ...
Zhenfu Tang, Yihua Qian, Dan Zhou, Wei Hu, Feipeng Wang, Yang Xu   +5 more
wiley   +1 more source

GMM-Based Lightning Damage Detection for Wind Turbines Under De-Rated Operation Using the Scaled Power Curve

Energies
Many countries are actively promoting the large-scale deployment of wind power generation, both onshore and offshore. However, damage to wind turbines caused by winter lightning has become a growing concern in Japan. Japan has made efforts since an early
Takuto Matsui, Koki Naito, Kazuo Yamamoto   +2 more
doaj   +1 more source

Development of a Lightning Location System Based on Electromagnetic Time Reversal: Technical Challenges and Expected Gain

The basic principles on which commercial Lightning Location Systems are based have not changed since their inception and the research and innovation efforts in the field have been essentially aimed at refining the location accuracy and at improving the ...
Rachidi, Farhad, Stojilovic, Mirjana, Rubinstein, Marcos   +2 more
core  

Comparison of Dielectric Recovery After Arc Burning in SF6 Gas and Its Potential Alternatives

High Voltage, EarlyView.
ABSTRACT Although sulphur hexafluoride (SF6) exhibits exceptional insulating properties, it is a potent greenhouse gas. Therefore, studying alternatives to SF6 is critical for developing environmentally friendly high‐voltage electrical equipment.
Ziqi Liu, Hao Sun, Yi Wu, Mingzhe Rong, Zeyuan Luo   +4 more
wiley   +1 more source

Rare Lightning and Convection Characteristics During Two Successive Tornadoes in Southern China

High Voltage, EarlyView.
ABSTRACT Systematic investigations into lightning characteristics of tornado storms in China remain scarce. This study comprehensively analyses rare lightning behaviour and overshooting top characteristics for two successive tornadoes during a long‐lived supercell in southern China on 27 April 2024.
Fengquan Li, Jiangling Zhi, Yu Wang, Hantao Tao, Zhaoming Li, Shanqiang Gu, Zhe Li, Zeyu Zhang, Lei Zhang, Guoying Tang   +9 more
wiley   +1 more source

Assessment of Lightning Activity and Early Warning Capability Using Near-Real-Time Monitoring Data in Hanoi, Vietnam

Atmosphere
This study investigates lightning activity and evaluates a near-real-time lightning warning system for the inner Hanoi area, using data collected during 2020–2024 from the Strike Guard (SG) and EFM-100C instruments located in Chuong My, Hanoi, Vietnam ...
Hoang Hai Son, Nguyen Xuan Anh, Tran Hong Thai, Pham Xuan Thanh, Pham Le Khuong, Hiep Van Nguyen, Do Ngoc Thuy, Bui Ngoc Minh, Nguyen Nhu Vinh, Duong Quang Ve, Hung Mai Khanh, Dang Dinh Quan, Tien Du Duc   +12 more
doaj   +1 more source

Investigation of the Evolution Mechanism and Multiphysics Coupling in Tree‐Contact Single‐Phase‐to‐Ground Fault

High Voltage, EarlyView.
ABSTRACT Tree‐contact single‐phase‐to‐ground fault (TSF) is a common and hazardous type of failure in distribution networks. TSF is likely to occur when overhead conductors contact moist tree branches, potentially leading to insulation breakdown, posing serious threats to grid safety.
Wenjun Ning, Zuopeng Li, Mingxian Liu, Jianbo He, Tianxiang Chen, Shenli Jia   +5 more
wiley   +1 more source

Lightning Impulse Ageing of HDPE

, 2009
This work is concerned with the hypothesis that lightning impulses can lead to accelerated ageing of extruded polymeric cables. The behaviour of an insulation material when suffering lightning impulses is different from that for DC or power frequency ...
Dao, N L, Swingler, S G, Lewin, P L
core   +1 more source

Quality Control Technique for Ground-Based Lightning Detection Data Based on Multi-Source Data over China

Remote Sensing
Lightning is one of the most severe natural disasters, characterized by its sudden onset, short duration, and significant damage. Existing quality control (QC) schemes for millisecond-level lightning observation data from a single source are primarily ...
Yongfang Xu, Yan Shen, Xiaowei Jiang, Fengyun Tian, Lei Cao, Nan Wang   +5 more
doaj   +1 more source

Mechanism of Quasi‐Power‐Frequency Resonant Overvoltage Triggered by Multiple Lightning Strikes in High‐Voltage Alternating Current Systems Equipped With Shunt Reactor

High Voltage, EarlyView.
ABSTRACT This paper investigates the generation mechanism of quasi‐power‐frequency resonant overvoltage triggered by multiple lightning strikes in high‐voltage alternating current (HVAC) systems equipped with shunt reactors. Based on field measurements from a 500 kV AC system, equivalent and simplified circuit models have been established to analyse ...
Tao Liang, Tao Cui, Zhengxi Wang, Tongwei Guo, Xiaohui Wu, Hong Zeng, Jie Guo, Yanzhao Xie   +7 more
wiley   +1 more source