Smart grid (SG) as a complex advanced electricity system is capable of facing with the growing energy demand, where energy consumers are connected not only to the conventional grid but also to some local energy markets for bidirectional energy trading. In this context, this paper presents an optimization problem the demand response problem where a hybrid energy trading system consisting of a conventional grid, a local trading system, a number of energy consumers, having distributed generators and battery, and some generator companies. In this case, it has been considered that the local trading center (LTC) is a non-profit oriented LTC which aims at benefiting the energy consumers and energy sellers. The optimization model is formulated as a mixed integer Linear Program (MILP) with a bounded number of variables and constraints. Furthermore, the solution can be obtained in polynomial time and provides the optimal scheduling for the problem such that the costs were minimized while the total demand is satisfied.

Keywords