Assoc. Prof. Haoxi Cong
School of Electrical and Electronic Engineering, North China Electric Power University, China
Experience: Assoc. Prof. Haoxi Cong, graduated from the School of Electrical Engineering, Shandong University, with a bachelor's degree in engineering and a doctorate in engineering in 2011 and 2016 respectively; from 2012 to 2016, he visited and studied in the State Key Laboratory of New Energy Power Systems, North China Electric Power University. Mainly engaged in the teaching of circuits and electrical engineering courses, as well as research work in advanced power transmission and transformation technology, electrical equipment intelligence and other aspects. Presided over 2 National Natural Science Foundation projects, participated in the completion of 4 National Natural Science Foundation projects, 1 sub-project of the National High-tech Research and Development Program (863 Program), and a number of scientific research projects of the State Grid Corporation, and published 1 academic monograph, both at home and abroad. He has published more than 50 research papers in important academic journals and conferences. He was selected into the Young Talent Support Program of the Chinese Society for Electrical Engineering, and served as a number of academic part-time jobs, including a member of the IEEE P2869 working group, a member of the CIGRE China National Committee Youth Committee, a member of the China Electrotechnical Society Youth Work Committee, and the IEEE PES Power Transmission and Distribution Technical Committee (China) Member of the Overhead Line Technology Sub-Committee, Youth Editor of the Journal of Insulation Materials, etc.
Speech Title：Synergistic Deterioration Mechanism and Protection Technology of Multiple Sulfur Corrosion Phenomenon in Power Transformer
Abstract：Multiple active sulfides in the transformer oil could react with the copper conductor to form cuprous sulfide, which adheres to the surface of the copper wire and the insulating paper, reducing the oil-paper electrical properties and cause insulation failure. At present, most scholars mainly focused on the corrosiveness of the single sulfide DBDS, while few on other sulfides and their synergistic deterioration effects. Based on the macroscopic experiment and microscopic molecular simulation, the project intends to analyze the change rule of aging characteristic parameters under different sulfide, voltage and temperature, to clarify the reaction process and their mutual conversion of multiple sulfur corrosion. Also, the synergistic deterioration mechanism of the oil-paper insulation by different sulfurs would be revealed. By extracting the decoupling characteristic parameters which can quantitatively characterize the multiple sulfur corrosion degree, the mathematic correlation model of the sulfur compositions, the aging characteristic parameters and the sulfur corrosion severity can be established, also with the quantitative characterization method of the sulfur corrosion severity degree. The protection effectiveness of passivator under multiple sulfur corrosion would be studied and the optimal passivator concentration for different corrosive sulfurs will be proposed. This project has certain scientific significance and application value for further revealing the sulfur corrosion phenomenon and its synergistic degradation mechanism, as well providing theoretical basis and technical means for preventing the sulfur corrosion insulation fault.
PROF. TOBIAS GEYER
ABB System Drives, Switzerland (IEEE Fellow)
Experience: Tobias Geyer (Fellow, IEEE, 2022) received the Dipl.-Ing. degree in electrical engineering, the Ph.D. in control engineering and the Habilitation degree in power electronics from ETH Zurich in the years 2000, 2005 and 2017, respectively. After his Ph.D., he spent three years at GE Global Research, Munich, Germany, three years at the University of Auckland, Auckland, New Zealand, and eight years at ABB’s Corporate Research Centre, Baden-Dättwil, Switzerland. In 2020, he joined ABB’s Medium-Voltage Drive division as R&D platform manager of the ACS6080. In 2022, he became a Corporate Executive Engineer. Working at the intersection of industry and academia he is also an extraordinary Professor at Stellenbosch University, Stellenbosch, South Africa, from the year 2017 until 2023. He is the author of more than 35 patent families, 150 publications and the book “Model predictive control of high power converters and industrial drives” (Wiley, 2016). He teaches a regular course on model predictive control at ETH Zurich. His research interests include medium-voltage and low-voltage drives, utility-scale power converters, optimized pulse patterns and model predictive control. Dr. Geyer received the PELS Modeling and Control Technical Achievement Award in 2022, the Semikron Innovation Award in 2021, and the Nagamori Award in 2021. He also received two Prize Paper Awards of IEEE Transactions and two Prize Paper Awards at IEEE conferences. He is a former Associate Editor of the Transactions on Industry Applications (from 2011 until 2014) and the Transactions on Power Electronics (from 2013 until 2019). He was an International Program Committee Vice Chair of the IFAC conference on Nonlinear Model Predictive Control in Madison, WI, USA, in 2018. Dr. Geyer is a Distinguished Lecturer of the Power Electronics Society from the year 2020 until 2023.
Speech Title：Controlling Megawatts with Power Electronics
Prof. Mohamed EL-Shimy
Electrical Power and Machines/Ain Shams University, Egyptian
Experience: Prof. Mohamed EL-Shimy is a professor of Power Systems in the Department of Power and Mechanics, Faculty of Engineering, Ain Shams University. He is also a mechanical and electrical expert, freelance trainer, technical consultant, and a member of numerous associations and professional networks. He is also a part-time technical reviewer for major journals and conferences. My areas of interest include power systems: analysis, stability, economics, optimization, distribution, renewable energy integration and reliability.
Speech Title：Variability compensation through green hydrogen for variable renewable energy systems
Abstract：This webinar presents an overview of the main characteristics of energy sources and requirements for the proper operation of power systems. The core of the webinar is a detailed overview of the hydrogen-based variable renewable energy systems for large-scale standalone operations. Details of the Power-to-Hydrogen-to-Power (P2H2P) and Power-to-Fuel-to-Power (P2F2P) systems are given from technical and economical points of view. In addition, simplified mathematical models are presented for estimating the steady-state and energy efficiency performances of various components comprising P2H2P systems. An energy management (or power plant controller) algorithm is also provided for illustrating the operational modes of these systems and the energy balance of various operational modes. Main research & development (R&D) requirements for providing reliable systems are also determined. The survey shows that P2H2P and P2F2P systems are expected to be techno-economically feasible enough to totally replace conventional fossil-based electric power generation technologies.
Assoc. Prof. Jinsong Tao
School of Electrical Engineering and Automation, Wuhan University, China
Experience: Assoc. Prof. Jinsong Tao received the M.Sc and D.Sc degrees in electrical engineering from Hubei University of Technology and Wuhan University, both in Wuhan, China, in 1997, 2006 respectively. During 2006 and 2007, He was as a visiting research associate in The University of Manchester, UK. He is currently an associate professor in Wuhan University. In 1989, he joined Wuhan Electric Transformer Factory, where he was an engineer involved with electric transformer design. From 1997 on, he came to the School of Electrical Engineering, Wuhan University. His current research interests include electromagnetic compatibility in power system, high voltage engineering, power system economics and intelligent transportation system. He has published 30 paper in which 8 are indexed by SCI.ead Line Technology Sub-Committee, Youth Editor of the Journal of Insulation Materials, etc.