A5015238374- Lightning and Electromagnetic Phenomena
- Thermal Analysis in Power Transmission
- Electrical Fault Detection and Protection
- Fire effects on ecosystems
- High voltage insulation and dielectric phenomena
- Combustion and Detonation Processes
- Ionosphere and magnetosphere dynamics
- Electromagnetic Compatibility and Noise Suppression
- Solar and Space Plasma Dynamics
- Power Systems Fault Detection
- Electrostatic Discharge in Electronics
- Solar Radiation and Photovoltaics
- Geomagnetism and Paleomagnetism Studies
- Advanced Decision-Making Techniques
- Wind and Air Flow Studies
- Fluid Dynamics and Turbulent Flows
- High-Voltage Power Transmission Systems
- Smart Grid and Power Systems
- Earthquake Detection and Analysis
- Advanced Battery Technologies Research
- Electric Vehicles and Infrastructure
- Planetary Science and Exploration
- Icing and De-icing Technologies
- Transportation Safety and Impact Analysis
- Risk and Safety Analysis
Wuhan University
2006-2025
Hong Kong Polytechnic University
2020-2023
Wuhan Research Institute of Materials Protection
2023
Jiangsu University
2019-2022
Chinese Academy of Medical Sciences & Peking Union Medical College
2010
National Space Science Center
2007
Renmin Hospital of Wuhan University
2006
Chinese Academy of Sciences
2006
Chinese Academy of Meteorological Sciences
2006
This paper addresses lightning surges on the transmission systems with a new hybrid method, using 1D FDTD model for line and PEEC tower channel. Compared other circuit-based models, mutual coupling between channel parts in system can be fully considered. method has been validated numerically experimentally, good agreements are observed. then is applied to analyze 500 kV double-circuit system. It found that significant impact surge response of struck. Ignoring from will weaken hazard strikes....
This paper presents an assessment of lightning protection schemes for overhead lines from two aspects: performance and economic cost. Considering the random nature lightning, Monte-Carlo method with a heuristic technique is applied in assessment. The one-dimensional finite-difference time-domain adopted to evaluate overvoltages on insulators currents surge arresters failure rate line addressed under both direct indirect lightning. A reduced set design parameters are identified. It found that...
When concerning the installation and operation costs, it is always desirable to protect an overhead distribution network with a limited quantity of surge arresters (SAs). This paper presents novel procedure for designing differentiated protection against lightning, by identifying appropriate positions those SAs on line. Rather than traditional flashover rate whole line, indices in terms numbers at individual poles associated possible stroke locations are introduced this paper. Based these...
This paper presented an assessment of lightning energy absorption by dedicated surge arresters (SA <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">DT</sub> ), which are provided to protect the distribution transformers on 10kV overhead lines (OHLs). A hybrid Partial Element Equivalent Circuit-Multi-conductor Transmission Line (PEEC-MTL) code was applied evaluate surges SA . method has capability modeling both short and long wires in OHL systems...
This paper presents a systematic investigation into the performance of shielding wire on 10 kV overhead lines (OHLs) against indirect lightning, from design point view. The parameters addressed include grounding interval, resistance, and position wire. As system outage is usually caused by insulator flashover at OHL poles under induced voltages there are investigated with code developed Agrawal model. In evaluation, location lightning return stroke relative to grounded or ungrounded pole...
In addition to insulator flashover, lightning damage of surge arresters (SAs) is also considered in evaluating the performance a distribution network. This article presents novel multi-objective optimization framework for designing differentiated SA protection, by minimizing both flashover number and rate. An artificial neural network an energy-distribution surrogate model are developed efficient evaluation these two targets process. The samples building models generated with hybrid...
This article discusses the lightning protection performance of a grounding grid for photovoltaic (PV) systems protected by independent rods. Several configurations are investigated, and transferred voltages between dc cables supporting structures at different points in PV system evaluated using finite difference time domain (FDTD) method. In without dedicated structures, voltage is very high, even worse if soil resistivity high. Installing grid, which costly large power plant, can reduce...
ABSTRACT The upward discharge is a significant factor threatening the operation of wind farms. This paper investigates inception and development leaders turbines' tip, where blade rotation prevents charge accumulation, using density models from laboratory discharges artificially triggered lightning. results indicate that larger return stroke currents create higher spatial potentials, slower downward leader speeds allow for longer time, favoring leaders. As turbine sizes increase, tips...
Background Higher heart rate is associated with mortality, whereas its association clinical cardiovascular events much more challenged. Methods A prospective study was conducted for 169 871 Chinese adults ≥40 years in 1991 and followed during 1999–2000 a response of 93.4%. Hazard ratios (HRs) were estimated by Cox proportional hazard regression model. Cardiovascular disease (CVD) defined as diagnosis acute myocardial infarction or stroke death due to CVD (International Classification...
This article presents an integrated model of the lightning channel and tall structure on ground for analysis, by considering their interaction. An extended distributed circuit is proposed modeling channel, including dynamic behavior corona sheath. The nonlinear, nonuniform, time evolution characteristics are taken into account. Meanwhile, wire modeled with partial element equivalent method. A lumped voltage source introduced to ensure "undisturbed" current waveform at attachment point....
Acoustic observation of laboratory simulated lightning discharge can greatly avoid the difficulties under natural thunderstorm environment. An acoustic experiment based on impulsive current generation system and a microphone array was carried out illustrated in this study. A quantitative study characteristics response sound pressure initiated from performed. The first arrived N-waves measured at different distances amplitudes were compared analysed. amplitude, rise time duration defined for...