Keynote Speakers of 2023
Associate Professor, Haoxi Cong
North China Electric Power University
Brief introduction: Haoxi Cong is an associate professor and a doctoral supervisor. He is mainly engaged in teaching circuit and electrician courses, as well as research work on advanced power transmission and transformation technology and electrical equipment intelligence. He has hosted three National Natural Science Foundation of China (NSFC) projects, participated in four NSFC projects, one sub-project of National High Technology Research and Development Program (863 Program) and many research projects of State Grid Corporation, published one academic monograph and more than 50 research papers in important academic journals and conferences at home and abroad. He has been selected as a member of IEEE Senior Member of China Electrical Engineering Society (CEEES), IEEE P2869 Working Group, CIGRE A1.73, CIGRE China National Committee Youth Committee, China Electrotechnical Society Youth Committee, IEEE PES Transmission and Distribution Technical Committee (China) Overhead Lines Technical Sub-Committee, and IEEE PES Insulation Materials. He is also a member of the Youth Engineering Committee of the Chinese Electrotechnical Society, a member of the IEEE PES Technical Committee on Transmission and Distribution (China), and a member of the Young Editorial Board of the Journal of Insulating Materials. He has long been a member of IEEE Transactions on Industrial Electronics, IEEE Transactions on Power Delivery, Journal of Electrical Engineering & Technology, Chinese Journal of Electrical Engineering, Chinese Journal of Electrical Engineering, Chinese Journal of Electrical Engineering, and Chinese Journal of Electrical Engineering. Journal of Electrical Engineering & Technology", "Journal of Electrical Engineering", "Journal of Electrical Technology", "High Voltage Technology", "Power Grid Technology" and other domestic and international journals as reviewers.
Speech Title: Vegetable oil transformer transition metal degradation mechanism and protection technology
Abstract: Vegetable oil transformer has the advantages of strong overload capacity, green environment protection, low loss, small local discharge, etc. It is an ideal green transformer with wide application prospect in the future. Vegetable oil transformers will gradually deteriorate under the action of electrical and thermal stress during operation, and are also affected by many environmental factors, and the degree of deterioration of their oil-paper insulation is closely related to their operating life. Research shows that the transformer core and winding of iron, copper and other transition metals have redox activity, long-term operation process will accelerate the deterioration of vegetable oil paper, a serious threat to the safe and stable operation of vegetable oil transformers. The core and copper windings are immersed in vegetable insulating oil for a long time, and high temperature and local overheating may occur in transformer operation, coupled with the influence of external factors such as electric field, oxygen, moisture, acid, etc. Therefore, the deterioration reaction mechanism of iron, copper and other transition metals on vegetable oil paper under the above circumstances will be more complex. In order to break through the above bottlenecks, the organic combination of macroscopic experimental research and microscopic molecular simulation is used to reveal the process and mechanism of the degradation reaction of coke transition metals on vegetable oil paper, and on this basis, a quantitative characterization method for the severity of the degradation reaction of transition metals on vegetable oil paper is established, and an effective protection method for vegetable oil paper insulation in the presence of transition metals is proposed. It has important scientific exploration significance and broad engineering application prospect for ensuring the safe and stable operation of future vegetable oil transformers, building strong and green power grid, and strengthening environmental protection and sustainable development.