A Transmission & Generator Expansion Planning Model Considering Flexibility and N-1 Contingency

The increasing penetration of renewable energy sources imposes higher requirement on the operation flexibility of the power system and brings new challenges to the planning problem. In this paper, a transmission & generator expansion planning model considering operation flexibility and N-1 contingency is proposed, in which the flexibility is provided by generators, energy storage, load and wind farms together. N-1 contingency of transmission line is also considered. Then the model is transformed into a mixed integer linear programming model by linearization technique such as big M method. The feasibility and effectiveness of the proposed model are illustrated on the IEEE RTS system.