Zhi Zhang received a B.S. degree in Automation from Xiangtan University, Xiangtan, China, in 2003, an M.S. degree in Power Electronics and Power Drives from Guangxi University, Nanning, China, in 2007, and a Ph.D. degree in Power Electronics and Power Drives from South China University of Technology, Guangzhou, China, in 2010. From 2010 to 2013, he was a Senior Application Engineer with East Group Co., Ltd., China. Since May, 2013, he has been an Associate Professor in the Department of Electrical Engineering, Dongguan University of Technology, Dongguan, China. From April 2018 to April 2019, he was a Visiting Associate Professor in the Department of Electrical Engineering and Computer Science, Case Western Reserve University, Cleveland, OH, USA. His current research interests include digital control and modulation methods of uninterruptable power supplies, photovoltaic inverter systems, grid-connected inverters, dc-dc converters and soft-switching techniques.