DC distribution system for energy efficient buildings

In the present scenario, electronic load is continuously increasing in the buildings which needs Direct Current (DC) input. These loads require conversion from AC to DC power. On the other hand the Renewable Energy Sources (RES) such as Solar Photovoltaic (PV) produce DC power which has to be converted into AC to tie into electric power systems and again converted into DC for DC compatible loads. These AC-DC and DC-AC-DC conversion stages introduce the energy losses. The DCDS eliminates the conversion stages. It can also decrease the power losses to an acceptable extent. In this paper two case studies have been described 1) the building is based on the AC Distribution System (ACDS) and supplied by public utility including PV and battery bank, 2) The building is based on DC Distribution System (DCDS) equipped by PV and battery bank including public utility. Results have been simulated in the LABVIEW environment. Outcomes show that the DC distribution system with DC internal technology appliances provide the largest energy saving and reduce the building load.