Study on Wind Power Consumption Capacity of Power Grid Considering Risk and Unit Commitment

Abstract

The wind power has drawn wide attention due to the increasing wind curtailment rate. One of the effective method to reduce the curtailment rate is to evaluate the wind power consumption capacity of power grid reasonably and accurately, which means planning wind power as optimal as possible. However, the power generation of wind is closely related to the ability of peak regulation and frequency modulation of a power grid and the volatility of wind. It is necessary to consider the typical operation conditions of power grid during the period of wind planning. The optimal consumption capacity model of multiple wind farms is established by the theory of multi-scenario unit commitment and vector ordinal optimization theory considering operational risk. The optimization model is established based on the statistical characteristics of wind power output, with the minimum amount of wind curtailment, the lowest risk, and the minimum operating costs as the objective functions. By the vector ordinal optimization theory, the optimal capacities of wind power consumptions under multiple scenarios with various wind power capacities of different wind farms are calculated. Finally, the feasibility and validity of the method are verified by simulating the IEEE RTS test system.