The Integrated Generation and Transmission Expansion Planning Considering the Wind Power Penetration

Normally generation expansion planning and transmission expansion planning are carried out separately, which will lead to non-matching between the generation system and the transmission system, and asset idle. This paper proposes an integrated multi-scenario generation and transmission expansion planning model in order to combine the generation expansion planning and transmission expansion planning together. In the integrated generation and transmission expansion planning (IGTEP) model, DC power flow constraints for alternative and existing branches are formulated for linearization separately. The uncertainties of the power system increase with the increased integration of intermittent wind power generation. The uncertainties of the load and wind power are handled with scenarios analysis method. In this paper, the K-means clustering method is selected. Three different cases are analyzed including 1) the annual maximum load without considering the wind power; 2) the timing load and wind power; 3) the timing load and wind power considering the priority of wind power integration. The IGTEP model is a mixed-integer linear programming problem, which can be solved with commercial optimization solver. Finally, the Garver-6 bus system is selected for the new model verification on MATLAB platform. Results demonstrate the mathematical characteristics and power system practical meanings of the models and methods the paper proposed.