Chao Lu is the Distinguished Professor and Vice Dean of the Department of Electrical Engineering, Tsinghua University, Beijing, China. His research focuses on data-driven power system analysis and control, and rail transit traction power supply technology. He also serves as Secretary General of Energy Internet Special Committee of Chinese Society for Electrical Engineering, and Associate Managing Editor or Editorial Member for several international and national journals. He received the Second Prize of National Technology Invention Award, the First Prize of Ministry of Education Technology Invention Award, and the First Prize of China Electric Power Science and Technology Award. Xiaoqian Li is an Associate Professor in the Department of Electrical Engineering at Tsinghua University, Beijing, China. She received her B.S. degree in electrical engineering at North China Electric Power University, Beijing, China, and her Ph.D. degree from the Department of Electrical Engineering at Tsinghua University, Beijing, China. Her current research interests include VSC-HVDC transmission and rail transit flexible power supply systems. Zhanhe Li is currently a Postdoctoral Researcher at the Hong Kong Polytechnic University, Hong Kong SAR. He received his B.S. degree in electrical engineering from Tianjin University, Tianjin, China, and his Ph.D. degree from the Department of Electrical Engineering at Tsinghua University, Beijing, China. His research focuses on flexible traction power systems, optimal power flow, and power system planning. Ziming Li is currently a Postdoctoral Researcher at State Grid Zhejiang Electric Power Co., Ltd., Hangzhou, China. He received his B.S. degree in electrical engineering from Huazhong University of Science and Technology, Wuhan, China, and his Ph.D. degree from the Department of Electrical Engineering at Tsinghua University. His research interests include high-power converters, VSC-HVDC systems, and flexible traction power supply systems. Weihan Bao is currently a Deputy Director at Sichuan Energy Internet Research Institute, Tsinghua University, Chengdu, China. He received his B.S. and M.S. degrees in electrical engineering from Xi'an Jiaotong University, Xi'an, China, and is currently working toward his doctorate in Electrical Engineering in the Department of Electrical Engineering at Tsinghua University. His research interests include modeling and control of power electronic systems, and flexible traction power supply systems