Prediction of Optimum High-Efficiency Devices Setting in Residential Microgrid

Microgrid is noticed as a system that can reduce CO₂ emission from a residential area. Microgrid can absorb the fluctuation of electricity power which might be generated with several kinds of renewable energy, therefore it doesn´t negatively affect on the stability of utility grid. In addition, microgrid has a capability to control the heat-and-power ratio in demand and supply by optimizing the combination of several kinds of high efficiency residential devices in the area. However, here are few researches on this optimum combination of the eco-system devices. Therefore in this report, microgrid was evaluated in consideration for regional characteristics; those are 12 kinds of demand patterns and 3 kinds of electricity CO2 emission coefficients. As a result of analysis, the region that has high heat-to-power ratio, large demand, and large capacity of photovoltaics makes much advantage of microgrid relating to CO2 emission reduction. Furthermore, we understand the advantage of microgrid expected in Japan. In Hokkaido and Okinawa, the advantage of microgrid is expected to be high.