Source-Network-Storage Joint Planning Considering Energy Storage Systems and Wind Power Integration

With the large-scale grid integration of wind power, the inherent space-time characteristics of wind power and the transmission congestion seriously restrict the consumption of wind power and the development of demand. In order to improve the wind power accommodation and load acceptance level, the joint planning including the wind power installed capacity and location, the transmission network expansion, and energy storage system locating and sizing is considered. The generation-side operation process and the charging-discharging strategy of energy storage systems are also involved. The source-network-storage joint planning model is established with the goal of minimizing the cost of the transmission network expansion, the construction and operation of energy storage systems, the conventional units' operation, the wind curtailment, and the heavy-load penalty. Furthermore, the energy storage system planning & operation constraints, the heavy-load operation constraints and the quadratic generation cost function are linearized in the MILP model. Through the Wood&Wollenberg 6-bus system, the IEEE RTS-24 test system, and the modified IEEE 118-bus system as the test systems, the joint planning schemes under multiple scenarios are compared and analyzed. The results show that the proposed planning model can effectively improve the load acceptance capability and wind power integration level.