Optimum operation planning of controllable loads in smart house

From the perspective of global warming suppression and depletion of energy resources, renewable energy such as wind generation 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 the worldwide. This paper presents a methodology for optimal operation of a DC smart-house with putting controllable loads as smart grid. The DC smart-house consists of PV system, solar collector (SC) system, heat pump, electrical vehicle (EV), and battery. The heat pump, the battery, and the EV are used as the controllable loads. The proposed method has been developed with the aim of power supply from power system within the acceptable range and reduction of max-min interconnection point power flow error as low as possible to smooth supply power from distribution system. Power consumption of controllable load determines to optimize the max-min interconnection point power flow error based on information from power system with communication.