Reserve Evaluation with Wind Considering Dynamic Characteristics and Power Network Constraints

Spinning reserve is the idle capacity connected to the system to ensure reliable operation in cases of the variability and uncertainties caused by wind integration. In this paper, the value of spinning reserve is evaluated by the reduction of expected involuntary corrective control costs, which include the costs of load shedding and wind curtailments. Reserve demand functions are constructed by marginalizing reserve value. Both frequency dynamic characteristics and power network constraints can significantly affect reserve value therefore both of them should be taken into account in reserve evaluation. In this paper, frequency dynamics are given by piecewise-linear forms using rotor motion equations and DC power flow is employed to model power network constraints. The proposed reserve valuation model can be solved by mixed integer linear programming (MILP). We conduct simulations on IEEE 14-bus system and illustrative examples show the effectiveness of the proposed method.