Optimal operation for DC smart-houses considering forecasted error

From the perspective of global warming suppression and depletion of energy resources, renewable energy such as wind generation (WG) and photovoltaic generation (PV) are getting attention in distribution systems. Additionally, all electrification apartment house or residence such as DC smart-house have increase in recent years. However, due to fluctuating power from renewable energy sources and loads, supply-demand balancing fluctuation of power system become problematic. Therefore, smart-grid has become very popular in worldwide. This paper presents a methodology for optimal operation of a smart grid to minimize interconnection point power flow fluctuation. To achieve the proposed optimal operation, we use distributed controllable loads such as battery and heat pump. By minimizing the interconnection point power flow fluctuation, it is possible to reduce the maximum electric power consumption and the electric cost. This system consists of photovoltaics generator, heat pump, battery, solar corrector, and load. In order to verify the effectiveness of the proposed system, MATLAB^® is used in simulations.