Towards integrated planning: Simultaneous transmission and substation expansion planning

This article presents a simultaneous approach for transmission and substation expansion planning using DC optimal power flow. The objectives are to minimize the sum of investment costs (IC) and minimize the expected operation costs (EOC). The system load uncertainty has been considered and the corresponding scenarios are generated employing the Monte Carlo (MC) simulation. Due to the computational burden of the stochastic proposed problem a scenario reduction technique is applied to reduce the number of scenarios.The proposed model has been applied to a four bus test system with three new candidate buses and also to the modified IEEE 24 bus reliability test system. The case studies illustrate the application of the proposed method and the detailed results are presented and thoroughly analyzed.

► We model a simultaneous transmission and substation expansion planning problem.
► The model is based on a DC-OPF approach considering load uncertainty.
► The proposed STSEP will lead to more efficient and optimal plan in a power system.