Evaluation and verification of an intelligent control system with modelling of green energy devices by constructing a micro-grid system in University Campus (report II)

We have been developing a high-speed simulator and micro-grid emulator for real-time energy management system. In this paper, we describe our new fast simulation model for PV system that will allow us to simulate 24-hour data in less than 5 sec. We use this simulator to make estimations and verify our management strategies. We have proposed a hybrid DC/AC micro-grid system in our previous work. The proposed system consists of several renewable energy supply sources and a secondary battery connected to the DC bus line while load and utility-grid are connected to the AC bus line. When the renewable energy power becomes lower than the demand, additional power is supplied from the secondary battery and the utility-grid. To optimally control the state of energy balance, it is necessary to develop a simulator for operational analysis. In addition, verification of simulation and emulation using real devices is essential. As for realization of emulator, a high-speed simulator is effective in predicting and analyzing system that incorporate energy usage patterns, running cost, and other factors. The proposed micro-grid emulator can realize seamless operation between simulation and emulation by using our revolutionary model. The verification results show that the proposed simulator and emulator are effective in the energy management strategies and to draw up optimum control operation of micro-grid system.