Optimal schedule of photovoltaic-battery hybrid system at demand side

Renewable hybrid systems, which can generate power from solar or wind with low cost, is commonly installed in remote areas. When some areas get grid connection, customers installed the hybrid system can earn cost savings if taking part in demand response programs. In this paper an optimal energy management for a grid connected photovoltaic-battery hybrid system is proposed to sufficiently utilize the solar energy and to optimally dispatch the power flow under into the time-of-use program. The management of power flow aims to minimize electricity bills subject to a number of constraints, such as demand balance, solar energy, and battery capacity. An optimal control method (open-loop) is developed to schedule the power flows of the hybrid system over 24 hours. As shown in results, optimal solution of scheduling the hybrid system can be obtained with great bill savings.