Results 131 to 140 of about 1,245,017 (279)

Refined Safety Distance Measurement of Heavy Construction Machinery Near Electricity Operation Based on Feature‐Homogenised Spatial Target Analysis

High Voltage, EarlyView.
ABSTRACT Heavy construction machinery is essential for power infrastructure construction and maintenance, making safety distance measurement crucial for ensuring operational safety. Existing methods, which rely on target space mapping, face challenges such as error accumulation and limited accuracy.
Fuqi Ma, Mingyang Qi, Rong Jia, Bo Wang, Leixiong Wang   +4 more
wiley   +1 more source

Observational Evidence of Negative Leader Reactivation Processes Following a Negative Return Stroke in Lightning Discharges

Geophysical Research Letters
High‐time‐resolved mapping results of two rare reactivation processes following a negative return stroke are discovered and analyzed. The reactivation processes can be roughly divided into two different stages.
Huaifei Chen, Weijiang Chen, Yu Wang, Nianwen Xiang, Kejie Li, Zhong Fu, Hengxin He, Lilang Xiao   +7 more
doaj   +1 more source

Comprehensive Design and Experimental Validation of 30 kV Ultra‐Fast Flexible Controllable Arresters for HVDC Systems

High Voltage, EarlyView.
ABSTRACT To effectively suppress transient overvoltages in HVDC systems, the design and experimental validation of a multi‐module series controllable arrester are presented. The voltage‐limiting performance, series voltage equalisation capability, and robustness under fault conditions in high‐voltage scenarios require further research.
Tai Yang, Xiangyu Zhang, Sihang Wu, Lei Qi, Xiang Cui   +4 more
wiley   +1 more source

Model experiments of lightning and the risk map of lightning damage

Journal of Japan Wind Energy Association, 2008
NATSUNO, Daisuke, SHINDO, Takatoshi, GODA, Yutaka   +2 more
openaire   +2 more sources

Improving prediction of short-duration heavy rainfall in Guangxi, China during the pre-summer rainy season based on Fengyun-4A lightning frequency and a machine learning algorithm

Frontiers in Earth Science
IntroductionThis study investigated the relationships between short-duration heavy rainfall (SDHR) events and lightning activity over Guangxi, China, during the pre-summer rainy season from 2019 to 2023.MethodsThe analysis was conducted using the ...
Weixiang Huang, Xiaoli Luo, Wei Zhang, Bo Feng, Xiaofei Xia, Chenying Yi, Weijun Hu   +6 more
doaj   +1 more source

Lightning flash properties derived from lightning mapping array data

in this paper size and duration of lightning flashes are examined. Data from the Ebro Valley Laboratory Lightning Mapping Array is used as reference. Additional data from the VLF/LF LINET network and meteorological radar is included.
Van der Velde, Oscar Arnoud, Argemí Ribera, Oriol, Fabró Tàpia, Ferran, Pineda Ruegg, Nicolau, Montañá Puig, Juan, Solà de las Fuentes, Glòria, Romero Durán, David   +6 more
core  

Study on the Power‐Frequency Arc Extinction Characteristics of Semi‐Closed Short‐Gap Device

High Voltage, EarlyView.
ABSTRACT Multi‐chamber arc‐extinguishing devices have a simple structure and excellent arc‐extinguishing performance; thus, they have attracted considerable attention as lightning protection devices. However, the structural parameters of different models of the aforementioned devices vary, leading to inconsistent protection levels; therefore, the arc ...
Yeqiang Deng, Caiwei Pan, Jintian Chen, Yu Wang, Lei Lan   +4 more
wiley   +1 more source

PowerGPT‐R1: Vision‐Language Reinforcement Fine‐Tuning With Verifiable Reward for Power Inspection

High Voltage, EarlyView.
ABSTRACT Vision‐driven intelligent power inspection systems have long faced the challenge of scarce high‐quality datasets in specialised domains, leading to limited performance of traditional deep learning methods (e.g., Faster‐RCNN) in few‐shot learning scenarios. Recent breakthroughs in language models, particularly the open‐source DeepSeek‐R1 model,
Yangyang Zhong, Pengxin Luo, Yunfeng Yan, Jun Feng, Shixiang Tang, Weizhen He, Yiheng Deng, Yi Chen, Yuhao Zhou, Qi Li, Xianbo Wang, Fushuan Wen, Donglian Qi   +12 more
wiley   +1 more source

Effects of Lightning Impulses on the Dielectric Properties of HDPE

, 2009
Impulse over-voltages are very common phenomena in electric power systems. Switching impulses are created by switching surges or local faults while lightning impulses are due to lightning strikes to overhead lines.
Dao, N L, Swingler, S G, Lewin, P L
core   +1 more source

Research on Embodied Intelligence Technology for Electric Power Equipment Based on Large‐Scale Pre‐Trained Models

High Voltage, EarlyView.
ABSTRACT With the development of electric power artificial intelligence (AI) technology, many complicated challenges emerged during application. Traditional AI algorithms work well in specialised tasks such as detection and classification. However, they are unlikely to solve general problems.
Yuanpeng Tan, Rui Song, Ankai Zhang, Wenhao Mo, Wenjin Ji   +4 more
wiley   +1 more source