An effective method for generation expansion planning in restructured power systems with considering emission

This paper represents a generation expansion planning (GEP) in the restructured power systems. For decoupling generation expansion planning from transmission expansion planning, a new method as T-index is used. The Benders' decomposition is implemented to reduce the complexity of problem. The Benders' decomposition divides the main problem into two subproblems-the first subproblem is the master problem which wants to maximize profits of each GENCO (PBGEP), and the second subproblem is the security problem which wants to satisfy security network constraints (SCGEP). Also, the second subproblem is divided into several subproblems such as feasibility subproblem, security-constrained unit commitment subproblem, T-index subproblem and optimal operation subproblem. Outputs of this algorithm included the place, type, size, and timing for the adding of new units. Also, we calculate value of each GENCO's profit and total profit. The value of the generated emission is one of the factors for generation expansion planning in this paper. This constraint is applied in GEP to reach allowable value for total generated emission. Finally, an application of the proposed method is discussed and concluded.