| Biography | |
|---|---|
 Dr. Fei You Nanjing Tech University, China |
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| Title: Characteristics of Physical and Chemical Performance Losses of High Voltage Transmission Lines Under Simulated Wildfires | |
| Abstract: Based on the experimental device designed and built independently, the loss characteristics of physical and chemical performances of high voltage transmission lines exposed to simulated wildfire flame and smoke sources like wood cribs, ethanol and smoldering vegetation were studied. Taking wood crib fire source as an example, scanning electron microscopy (SEM), metallographic microscopy, X-ray diffractometer (XRD) and high and low temperature universal creep testing machine were used to characterize the structure, crystal structure and mechanical properties of fresh and fired aluminium cable steel reinforced (ACSR). The results show that when the wood crib fire source intensifies, the damage to the conductor at the same height from the fire source is more serious, and the number of melting holes on the surface increases. Under three wood cribs, obvious cracks appear on the microscopic surfaces of the conductor. When the distance from the fire source is 40 cm and 60 cm, with the increase of the fire source power, the content of Al element decreases gradually while that of O element increases. When the conductor is severely damaged by heat and not fused, the grain boundary of the metallographic structure is not obvious. When the conductor is fused, more porous holes and grain boundaries are formed. The fire source will destroy the growth of the crystal plane inside the aluminum conductor. As the fire source approaches, the intensity of the diffraction peak of the aluminum conductor crystal plane gradually decreases. Under the power of single, double and triple stack fire sources, the ultimate tensile force of the conductor without fuse is 13.2 %~53.2 %, 37.5 %~54.5 % and 54.3 % lower than that of the fresh conductor. Keywords: high voltage transmission lines; wildfire; woodcrib flame; ethanol flame; smoldering vegetation smoke; performance loss; physical and chemical performances | |
| Biography: Dr. Fei YOU, now is a professor of College of Safety Science and Engineering & Deputy Director of Institute of Fire Science and Engineering at Nanjing Tech University, Research Scholar of University of Michigan (Ann Arbor, Department of Materials Science and Engineering, College of Engineering). He got his Ph.D. in Engineering Discipline of Safety Technology and Engineering in 2008 from State Key Laboratory of Fire Science at University of Science and Technology of China (USTC). He has been undergoing interdisciplinary researches for years in fields include "Evolution Properties and Mechanisms of Special Fires and combustion processes in the key segments of smart grid (power generation by wind turbine, coal and WEEE, high-voltage power transmission)", "Preparation, characterization and application of multi-functional hybrid and composite materials in electrical power industry and their fire safety issues". More than 120 papers (almost 70 papers SCI and EI indexed) have been published regarding above interdisciplinary aspects. Top journals include Journal of the American Ceramic Society, Energy and Fuels, Renewable Energy, International Journal of Hydrogen Energy, Applied Mathematical Modelling, etc.. Nearly 20 items of invention patents and utility model patents at home and abroad have been authorized and accepted including China, the Netherlands, Belgium and Australia. Prof. Fei YOU is project leaders of almost 50 funding items including National Natural Science Fund of China (NSFC). He has won the award of 2020 Innovation and Promotion Award of CIUR (China Industry-University-Research Institute Collaboration Association). He has been granted as the person in charge of the 15th Six Talent Peaks Project in Jiangsu Province in Renewable Energy and Energy Internet Industry in 2018, deputy general manager of science and technology of Innovation and Business-startup of Jiangsu Province with Jiangsu Suolong Fire Science and Technology Co., Ltd. in 2019, the supported person of high-level Innovation and Business-startup Talent Introduction Plan of Taizhou city (Jiangsu Province) in 2020, and the chief expert (15th batch) in communications of science and technology of Jiangsu Province in 2020. Also, he has provided technical services for almost 70 representative companies including FORTUNE Global 500 firms. | |
