Smart Grid and Emergency Power Supply on Systems with Renewable Energy and Batteries: An Recovery Planning for EAST JAPAN Disaster Area

This paper describes the design method of smart grid energy systems based on the simulation for introducing renewable energy (RE) and secondary batteries. The emergency power is also available. Managing RE systems and battery storage can minimize the cost of electricity by optimization balance between supply and demand as well as can reduce environmental impacts. Also the systems enable us to use emergency power supply for accidents and disasters, and to enhance robustness of electric power systems. To actualize the electricity management systems, the object-oriented and time-marching energy management simulator is developed which simulates power production, transmission and distribution, charge and discharge, and consumption of electricity every half hour. By using that simulator, peak and amount of power supply can be decreased. As a case study, we applied the systems with photovoltaic power (PV) generation and secondary batteries to reconstructed elementary schools that were damaged by Tohoku earthquake and tsunami on March 11, 2011, and consequently the validity of the analysis was obtained. Furthermore, it was verified the case that the systems were applied to business, which involves more profits than public facilities, and we examined requirements for business.