Stochastic optimal dispatch model considering wind turbine shut down events under extreme wind condition

摘要

The wind power output is affected primarily by external meteorological factors. Under extreme wind condition, individual wind turbine might automatically shutdown once the wind speed is near or exceeds the cut-out speed for self-protection. This results in the output power reduction of a wind farm, which raises the security concern due to the imbalance between generation and demand, particularly for power systems with high wind power penetration. In this paper, the Type I Extreme Value Theory is adopted to depict the extreme wind speed. A stochastic optimal dispatch model considering wind turbine unexpected shutdown events based on chance-constrained programming theory is established. An improved Genetic-algorithm is developed to solve the non-convex optimization problem. The results imply that the dispatch model will give full consideration of such emergency situation, and provide a more reasonable dispatch plan for power system disaster prevention and reduction.