A community energy management system (CEMS) stands between energy consumers in a community and energy suppliers, and provides ancillary service to the former. A CEMS performs day-ahead scheduling for its energy conversion equipment and energy purchase planning for the next day to minimize energy consumption and cost under some constraints. In this study, we assume that multiple CEMSs can cooperatively perform the aforementioned; we examine a day-ahead scheduling problem among a group of CEMSs using two key solutions for energy saving: demand response and energy trade. Using the demand response, CEMS can change the energy of consumers to improve energy utilization efficiency. Using the energy trade, CEMSs can trade surplus energy with each other. First, we build an optimization problem for a group of CEMSs. Then, the alternating direction method of multipliers is used to decompose the optimization problem into a distributed optimization problem. Results of numerical experiments show that both the demand response and the energy trade cooperatively affect energy saving of the group.
MasahiroOkada (Non-member) received the B.E. and M.E. degrees in electronic and information engineering from Osaka University in 2015 and 2017, respectively. Takuya Fukuda (Student Member) received the B.E. degree in electronic and information engineering from Osaka University in 2016. He is currently working toward the M.S. degree in the Department of Electrical Engineering and Information Systems, Graduate School of Engineering, University of Tokyo. His research interests include optimal control systems for electric vehicle. Shoichi Kitamura (Member) received the B.E. and M.E. degrees in biophysical engineering and the Dr. of Eng. degree in electrical engineering from Osaka University in 2000 and 2002, and 2013, respectively. He joined the Advanced Technology R&D Center, Mitsubishi Electric Corporation, Hyogo, in 2002, where he was engaged in research on the factory energy management system. At present, he is engaged in research on smart grid and smart community-related technologies.