Abstract
The viability of microgrid concept has been demonstrating in the US, Europe and Japan. To increase renewable energy near the demand side, a microgrid is proposed that utilizes controllable prime movers such as gas engines to compensate fluctuating demand and output of renewable energy. If gas engines can track to some degree the change in output of renewable energy and in load, the required battery capacity can be reduced. We designed the control system of a microgrid with a small gas engine and battery to compensate the fluctuation of demand and output of renewable energy with reduced capacity of the battery. We also validated the effect of the control system by the field test.
