A5090754090- Lightning and Electromagnetic Phenomena
- Fire effects on ecosystems
- High voltage insulation and dielectric phenomena
- Electrical Fault Detection and Protection
- Power Systems Fault Detection
- Plant responses to water stress
- Combustion and Detonation Processes
- Electromagnetic Compatibility and Noise Suppression
- Industrial Engineering and Technologies
- Electric Power Systems and Control
- Embedded Systems and FPGA Design
Wuhan University
2022-2024
This article analyzes the three-phase lightning-induced voltages (LIVs)waveform on a 1513 m long overhead distribution line 40 from rocket-triggered lightning, and corresponding current electric field data are given. The return stroke peak ranges 5.7 kA to 36.5 kA. arithmetic mean(AM) geometric mean(GM) of amplitude 14.7 13.5 respectively. peak-to-peak value range waveform is 21.7 kV/m–130.9 kV/m. observed voltage waveforms have similar features. Among 35 LIVs, 17.1 kV 103.7 kV, negative 2.3...
A multibranched altitude-triggered lightning flash containing 15 attempted leaders (ALs) was observed. These propagated along three paths with different development processes. The average two-dimensional speed of the ALs ranged from 3.8 × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</sup> m/s to 29.4 m/s, and terminal height over 1626 505 m above ground. progressing characteristics were investigated in detail based on high-speed video...
Abstract The dart leader development process of an altitude‐triggered lightning flash with eight return strokes was analyzed. analysis, based on the high‐speed camera and electric field data, revealed three different processes leaders: (a) normal process; (b) chasing leader; (c) bidirectional leader. These leaders are very in terms average 2‐D speed change. Moreover, process, upward positive is greater than that downward negative A piecewise‐speed source‐charge model used to simulate change...
A new rocket-triggered lightning experiment site has been established by us in Zhanjiang, Guangdong Province, China since the summer of 2022, for aim direct or indirect coupling effect research on industrial systems such as wind turbine, overhead distribution line system, small-scale steel building structure, and buried cables due to both natural flash. This paper reports lightning-induced overvoltage observed a test line, caused 24 return-stroke events during 2 consecutive days afternoon...
This article presents the induced overvoltage caused by nearby artificial-triggered lightning at different observation points on 10 kV distribution lines in Conghua area of Guangzhou during summer 2018. The waveforms measured transmission feature obvious regularity. Three-phase has similar waveform characteristics, each point starts from slow rise negative polarity, which can reach a peak after tens microseconds, then polarity reversal occurs within 2–10 <italic...
This paper mainly analyzes the development process of a natural upward lightning flash initiated from wind turbine in Zhangbei farm 2019 using optical data. The duration was more than 283 ms, and there are totally 7 return strokes with their peak current varied -8.1 kA to -18.7 kA. average 2-D speed leaders preceding all is greater 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sup> m/s, leader RS6 being slowest at 2.6 x...