Abstract
Dispersed generators such as wind power generation, photovoltaic system, and co-generation system are expected to mitigate the environmental burden or energy consumption, and their installation is recently promoted. Micro-Grid is focused on as a method to solve some problems to a commercial electric power line when installing a large number of dispersed generators, and some demonstrative researches on Micro-Grid for large scale systems are carried out now. Also, small co-generation systems for houses such as gas engine and fuel cell are expected to improve the CO2 emission. However, if the power and heat demand of a family are relatively small or are unbalanced, the co-generation system doesn't operate effectively. The authors studied the application of Micro-Grid for home energy supply, and have developed a control system to solve this problem. The system enables us to reduce CO2 emission and energy cost by sharing electric power and heat among some houses with co-generation systems. This paper presents the outline of the developed system, and especially describes the effect of the reduction in CO2 emission compared with a conventional energy supply method and the case when dispersed generators are installed in some houses and operate independently.
