On August 26, 2020, the "2020 Ninth Academic Forum on Frontier Issues in Electrical Technology and the 13th China Electrical Equipment Innovation and Technology" co-organized by the China Electrotechnical Society and Xi'an Jiaotong University*** Development Forum" (FAFEE 2020) was held grandly in Xi'an, with the theme of "Intelligent Integrated Electrical Innovation Leading Development". After seeking the consent of the experts who spoke at the conference, this article will share part of the report with everyone. Please continue to pay attention to it.
Professor and doctoral supervisor of Southwest Jiaotong University, IEEE Fellow, IET Fellow, Chinese national representative of CIGRE B2 international large power grid organization, national "Ten Thousand Talents Program" teaching teacher, Ministry of Education "Yangtze River Scholar" distinguished professor, national key Leader of the Domain Innovation Team.
Professor Wu Guangning has presided over and undertaken 9 National Natural Science Foundation projects, including 1 Distinguished Youth Fund project, 3 key fund projects, and 20 national, provincial and ministerial level scientific research projects. IEEE He has 4 international standards and 2 industry standards, written 10 monographs, published 216 papers included in SCI/EI, and authorized 31 invention patents.
With the overall goal of ensuring the safe operation of key rail transit traction power supply equipment, Professor Wu Guangning closely adheres to the overall idea of ??"core materials-key equipment-system protection", and has made extensive use of advanced electrical materials in rail transit and traction power supply equipment. Systematic and in-depth research work has been carried out in three aspects: status detection, traction power supply system overvoltage and protection.
The research results have been promoted and applied to Wuhan-Guangzhou, Beijing-Shanghai, Harbin-Dalian and other high-speed railways and Daqin, Shuohuang and other heavy-haul railways, and won 1 second prize of the National Science and Technology Progress Award, the Ministry of Education and the China Railway Society, etc. Three provincial and ministerial first-class awards have laid a good foundation for my country's high-speed rail technology and equipment to go global.
Professor Wu Guangning pointed out in his speech that the Sichuan-Tibet Railway is the most challenging railway project in human history. The Sichuan-Tibet Railway plans to use rigid contact network for power supply, which is the most economical and reliable solution for the pantograph power supply system of the Sichuan-Tibet Railway. The existing rigid pantograph system is mainly used in subway lines, and problems such as frequent vibration and impact have occurred. The voltage level and operating speed of the Sichuan-Tibet Railway have been greatly increased. The environment is harsh, with steep line slopes, long tunnels, and high altitudes. Coupled vibrations of the pantograph-catnet system are easily generated, the compressive strength of the air gap is reduced, and the rigid pantograph-catnet system is mechanically/electrically damaged. The problem will be more serious, and there is still no experience at home and abroad. Therefore, achieving stable current flow through the high-speed rigid pantograph network of the Sichuan-Tibet Railway is an important requirement for future development.
Professor Wu Guangning said that for the further development of high-speed railways in the future, research work focuses on matching the train operating speed and the current limit. As the running speed of the train continues to increase, the traction force of the train continues to decrease due to wheel-rail adhesion problems, the running resistance increases exponentially with the speed, the pantograph current receiving quality and efficiency gradually decrease with the speed, and the bottleneck effect of the pantograph current receiving system gradually appears. Therefore, it is an important direction for future development to ascertain the intersection boundary of traction force, operating resistance and current receiving efficiency as the speed develops, to further improve the service performance of the pantograph and catenary system, and to explore the operating speed limit of the pantograph and catenary system.