Transmission Switching in Integrated Generation and Transmission Maintenance Scheduling in Power System

This paper models and investigates the incorporation of optimal transmission switching (TS) into integrated generation and transmission maintenance scheduling (IMS). The IMS with TS (IMSwTS) problem is formulated as a mixed-integer linear programming model. This problem is hard to solve by off-the-shelf commercial optimization solvers since on the one hand maintenance scheduling variables couple several time intervals together and on the other hand TS variables. A solution approach is proposed in this paper to address the problem’s high computational burden which decomposes the IMSwTS  problem into two subproblems, an IMS subproblem and an optimal TS subproblems, and solves them iteratively. The proposed model and decomposition approach are implemented on IEEE reliability test system. The results demonstrate that adding TS to IMS alters the maintenance schedule and brings cost saving.