Loss evaluation of dc distribution for residential houses compared with ac system

TitleLoss evaluation of dc distribution for residential houses compared with ac system
Publication TypeConference Paper
Year of Publication2010
AuthorsKakigano H, Nomura M, Ise T
Conference Name2010 International Power Electronics Conference - ECCE Asia -, IPEC 2010
KeywordsDC distribution, Distributed generation, efficiency, Microgrid, Power losses
AbstractIn this paper, loss of a dc microgrid system for residential complex is compared with loss in an ac system. Each system has a PV system, a gas engine cogeneration and 20 residential houses. The losses are calculated from measured load data and PV output data which was estimated from global solar radiation and temperature of a PV panel. The operation of the gas engine cogeneration is determined from the heat demands. As house loads, we consider an air conditioner, a refrigerator, a washing machine and a liquid crystal display (LCD) in each house. The loss calculation result shows the total losses in the dc system are around 15% lower than the losses in the ac system.