DC Microgrid Experimental System at KIT and its Autonomous Distributed DC Voltage Control Method

摘要

We have been conducting the electric heating-linked DC microgrid demonstration experiment aiming at local production for local consumption of renewable energy resources since 2018. The generated power is supplied to the cottage where the staff live by the DC 360V feeder. In this paper, we propose new autonomous distributed method of charge and discharge control of storage batteries that balance supply and demand of DC power. This method is formulated as an optimization problem with the objective function of maximizing the operation duration when the DC microgrid operates in independent operation. Firstly, the outline of the demonstration experiment will be explained. Next, the outline of the DC voltage control method and the simulation evaluation results using the real data from the site will be explained.