Michigan Power & Energy Laboratory
Michigan Power & Energy Laboratory
Michigan Power & Energy Laboratory Michigan Power & Energy Laboratory

Students and Postdocs

Sung Yul Chu grew up in Seoul, South Korea and received his Bachelor’s and Master’s Degrees in Electrical & Electronic Engineering from Yonsei University in South Korea in 2009 and 2011, respectively. His master’s work focused on the design and manufacturing of superconducting magnets. Before joining University of Michigan, he was an assistant Engineer-HW for smart phones at Samsung Electronics, Suwon, South Korea (2013) and a junior research engineer for automotive sensor’s digital circuit at Hyundai Kefico, Gunpo, South Korea (2014-2016).

He is currently pursuing a PhD at the University of Michigan working with Prof. Al-Thaddeus Avestruz. His current interests involve the wireless power transfer, power measurements and its coil design.

To contact Sung Yul, please send an e-mail to sungyul@umich.edu 


Stephanie Crocker hails from Poughkeepsie, NY. She went to Dartmouth College in Hanover, NH for her undergraduate studies. While there she volunteered for Dartmouth Humanitarian Engineering and spent 10 weeks in Tanzania working on a project to improve the efficiency of wood burning cook-stoves. In her senior year she discovered a love of power electronics, which led her to pursue an entry level position at FINsix, a startup focused on shrinking the "power brick" (i.e. the laptop charger). After a year and a half "break" from school, Stephanie came to Michigan to work with Prof. Johanna Mathieu on controlling thermostatic loads for use in automatic demand response programs.  Her current research focuses on the determining the impact on the distribution power system's physical constraints when thousands of thermostatic loads are being coordinated by an aggregator.

Stephanie is an outdoor enthusiast, and likes to bike, kayak, and cross-country ski. Around Ann Arbor her favorite spots are the Nichols Arboretum, the Bridge-to-Bridge bike trail along the Huron River, and Pinckney State Rec. Area.

Xiaofan Cui was born in Xian, Shaanxi, China. He received his bachelor's degree in Electrical Engineering and Automation from Tsinghua University in 2016. His undergraduate work includes electromagnetic field measurement, mechanical design, and high performance power electronics circuits design. He is now in Professor Al Avestruz’s group and studying for a PhD degree at the University of Michigan in Ann Arbor. His main research interests involve solar energy circuits analysis. To contact Xiaofan, please email cuixf@umich.edu.

Sijia Geng received her bachelor’s degree in Automation from Harbin Institute of Technology in 2016. During her undergraduate studies, she worked as research assistant in the Research Institute of Intelligent Control and System. Sijia also did an exchange study to the Purdue University in her senior year. After graduation, she joined the Michigan Power and Energy Laboratory at the University of Michigan working with Prof. Ian Hiskens. Her research interests include nonlinear and hybrid system analysis, second-order trajectory sensitivity analysis, microgrids control and optimization, and renewable energy resources. Sijia desires to apply her research to the real world in the hope of uplifting the whole people. During her free time, she enjoys playing piano and traveling. Sijia is also the membership chair of GradSWE at UM since 2017. Contact: sgeng@umich.edu.

Jun Hou is originally from Shenyang, China. He received his bachelor's master's degrees in Electrical Engineering from Northeastern University (CN) in 2009 and 2011, respectively. His undergraduate and master's work focused on control theory and control applications, including automatic guided vehicles, intelligent homes, and mechatronic systems. Currently, he is pursuing a PhD at the University of Michigan and working with Prof. Heath Hofmann and Prof. Jing Sun. His research interests involve modeling, dynamic control and optimization for electric propulsion system with hybrid energy storage. His current research focuses on developing energy management strategies for all-electric ship propulsion system to improve system efficiency and reliability using hybrid energy storage. To contact Jun, please email junhou@umich.edu.

Jonas Kersulis grew up near Saint Louis, Missouri. Fascinated by the logic of circuits, he enrolled in the University of Missouri-St. Louis/Washington University Joint Undergraduate Electrical Engineering Program in 2009. During his junior year, Jonas was hired as a sound lab technician for Nidec Motor Corporation. There he gained an appreciation for electric motor dynamics, washing machine acoustics, and the plurality of ball bearing failure modes. Upon graduation with a B.S.E.E. degree in 2013, Jonas joined Michigan’s Electrical Engineering:Systems PhD program to work with Dr. Ian Hiskens. In summer 2014 Jonas joined the US Department of Energy’s Grid Science Program by working at Los Alamos National Laboratory’s Center for Nonlinear Studies.

Jonas is interested in applying mathematical programming to power system problems. He is currently exploring the effects of wind variability on transmission networks. Jonas is also using computational tools to bring new interactivity to numerical experimentation and power system visualization.

Greg Ledva received his bachelor’s degree in Mechanical Engineering from Penn State before pursuing a master’s degree in the MEST program at ETH Zurich. During his time in Zurich, he found an interest in power systems and research, and he is now working with Dr. Mathieu while working towards his PhD at the University Michigan. His research interests include developing control algorithms that reduce communication and sensing requirements in demand response programs and adapting machine learning methods to control techniques. His other interests include travelling, watching football, playing rugby, and enjoying the outdoors while kayaking, paddle boarding, and fishing. To contact Greg, please email gsledv@umich.edu.

Bowen Li is originally from Dalian, China. He received his dual bachelor degrees in Mechanical Engineering and Electrical Engineering from Shanghai Jiao Tong University and University of Michigan respectively in 2013. His undergraduate works covered different areas including digital and analog integrated circuit design, power electronics design and modelling, mechanical design and manufacture projects and some computer vision application. Currently, he is pursuing a PhD degree at University of Michigan and working with Prof. Johanna Mathieu. His main research interests involve developing and evaluating various methodologies and models used in stochastic optimal power flow problem considering renewable resources and demand response. To contact Bowen, please email libowen@umich.edu.

Md Salman Nazir is originally from Bangladesh. Salman received the B.Eng. (Honours) and M.Eng. (Thesis) degree, both in Electrical Engineering, from McGill University, Montreal, QC in 2011 and 2015, respectively. His undergraduate thesis involved applying game theory to study the strategic behavior of generators in electricity markets and his master’s thesis involved modeling power systems scheduling applications for systems with significant wind energy. During 2012-2014, he was a smart grid engineer at the CanmetENERGY laboratory of Natural Resources Canada, where he worked on developing control algorithms for integration of distributed energy resources into the power grid.

Salman is currently a Ph.D. student at University of Michigan. His research interests include operations, control and economics of power systems at presence of significant renewable and distributed energy resources. Contact: mdsnazir@umich.edu

Ziyou Song's interests include optimization, control, modeling, and estimation of electrical powertrain for electric, hybrid electric, and plug-in hybrid electric vehicles. In recent years, he mainly focused on the optimization and control of the battery-supercapacitor hybrid energy storage system (HESS), which has been widely used in PHEV applications. In previous publications, he showed that the energy management strategy and the component sizing of HESS should be optimized simultaneously to reduce the battery degradation and increase the system efficiency. Different HESS configurations were also compared based on the dynamic battery degradation model. Furthermore, a sliding-mode current controller and a Lyapunov function-based voltage controller were proposed to accurately control the battery/supercapacitor currents and bus voltage. For now, he works with Professor Heath Hofmann on the adaptive energy management strategy, which can be used in HESS when its parameters significantly change. In addition, he also cooperates with Professors Minggao Ouyang and Jianqiu Li in Tsinghua University to deal with the network time-delay problem in distributed electric vehicles. To contact Ziyou, please email ziyou@umich.edu.

Anna Stuhlmacher received her bachelors of science from Boston University in Electrical Engineering. Currently, she is pursuing a PhD degree at the University of Michigan with Prof. Johanna Mathieu. Anna's current research focuses on creating an optimal urban water distribution algorithm that is spatio-temporally responsive to the electricity distribution network’s locational marginal prices, while meeting the consumers’ demands. By coupling these networks, the water distribution network would no longer be a passive load on the electricity network. She is originally from the western suburbs of Chicago. In her free-time, Anna likes hiking, biking, ice cream, and playing badminton. To contact Anna, please email akstuhl@umich.edu.

Yuanying Wang is from Chengdu, China, the sweet home for giant pandas and hotpot. She received her bachelor’s degree in Electrical Engineering and Automation at Huazhong University of Science and Technology, Wuhan, China in 2014, and master’s degree in Control and Signal Processing at University of Michigan in 2016. She is currently pursuing her PhD degree at University of Michigan in Prof. Heath Hofmann’ research group. Her research focuses on computational thermal analysis and thermal modeling of electric machines. Yuanying loves playing badminton and piano in her spare time. To contact: yuanying@umich.edu.

Mengqi Yao was born in Hunan, China. Under the influence of her parents who both have a solid academic background in the field of electrical engineering, her initial interest in Electrical Engineering was ignited at very young age. She earned her Bachelor's Degree in Electric Power Engineering & Automation from Shanghai Jiao Tong University in 2014, and in 2016 she received her Master’s Degree in Electrical Engineering (Power & Energy) from the University of Michigan. She is currently pursuing a Ph.D. at U of M, working with Prof. Johanna Mathieu. Her research interests include demand response effect on power system stability and development of methods to evaluate and improve electric power system stability margins. Contact: mqyao@umich.edu

Xin ZAN grew up in Qinghai - Tibet Plateau, the Third Pole of the world. He received his bachelor's degree in Electrical Engineering and Automation from Tsinghua University, China in 2016. During his undergraduate studies, he made progress in the fields of electromagnetics and the application of information theory in power systems. He also focused on power electronics and his undergraduate thesis is Modeling of IEGT and Loss Simulation of Its Converters.

Xin ZAN is currently pursuing a Ph.D. degree with Prof. Al-Thaddeus Avestruz. His interests are power electronics, renewable energy, circuit design and control. Outside of work, Xin enjoys sports, travel, movies and cooking. To contact Xin, please email him at xinzan@umich.edu