Research on Generation and Transmission Expansion Planning with Large-scale Wind Farms Integration

摘要

Higher requirements for the power conditioning capacity of power system need to be proposed in view of the randomness and intermittence of renewable energy connected to the grid in large scale. In order to cope with the conventional units ramp-up/down problems caused by wind power, a novel generation and transmission expansion planning model considering positive and negative climbing ability of conventional units and N-l security constraints is proposed in this paper. The model aims to minimize total annual comprehensive cost, which consists of annual investment cost, fuel cost, penalty cost of wind power curtailment. Moreover, the operation states of the units and transmission lines (i.e. unit commitment and active optimal transmission switching), unit adjustment capacity and spinning reserve are taken into account in constraints to gain a more flexible planning scheme. Finally, the modified IEEE RTS-24 bus system is proposed to verify the effectiveness of the model.