Research On Dispatch Method With Wind Power Integration Considering The Uncertainty Of Wind Power

Due to characteristics such as no energy consumption, no pollution and no emission, wind power generation has gradually become a new energy power generation technology that is relatively mature and on a large development scale. Due to the large randomness and the strong fluctuation of wind power output, and wind power forecasting accuracy is hard to meet the actual demand, are bound to bring greater difficulties for the economic dispatch with large-scale wind power integration, a new challenge with the safety operation of power grid is proposed.Therefore, it is of great practical value and economic significance to reduce the wind curtailment and the construction of strong smart grid by studying the uncertainty of wind power and economic dispatch with large-scale wind power integration. The wind power uncertainty output impact on power system dispatch is studied. On this basis, the unit commitment and economic dispatch with wind power integration based on wind cost, and an optimization method of wind-thermal-energy storage joint dispatch system considering the wind power uncertainty output are studied.The uncertainty of wind power output gives the economic dispatch with wind power integration some certain challenges, if taking the traditional method for wind power integration,you need to set aside a large number of spinning reserve that is prepared to adjust the wind power uncertain output, to increase the cost of conventional units. This paper is Based on a day-ahead wind power forecasting output and a near-real-time output, wind power cost model is established. This paper proposes a new considering wind power integration unit commitment method, and this method prepares timely to adjust the unit commitment plan by the prediction of the near-real-time and day-ahead wind power output. Using the proposed method on 6 machine system, the simulation results show that this method can establish reasonable unit commitment on the basis of the wind power output characteristics. Consequently, to reduce system spinning reserve, improve the economy of system operation and effectively decrease the generation cost caused by wind power uncertain output. The optimization model with wind power integration considering the unit commitment is established, which provides an optimization dispatching scheme with obvious social and economic benefits when solving the problem of wind power integration.Due to such features of wind power as uncertainty and intermittence, this paper establishes the model of wind power uncertainty output. On the basis of analyzing system demand for energy storage system and reserve system under influence of wind power uncertainty output, this paper optimum use of energy storage system and reserve system by introducing a conversioncoefficient. Meanwhile, based on the regulation features of energy storage system and reserve system, the models of compensation cost for wind power curtailment and penalty cost for wind power shortage are built, and solving wind-thermal-energy storage joint dispatch model of wind power integration by combining with model of thermal units cost. Through example simulation,the presented method is compared with existing approach. The results show that, the presented method can reduce the system operating costs, wind curtailment and wind shortage. Wind power uncertainty output model is established in this paper, which can more accurately describe the wind power uncertainty output. This paper optimum use of energy storage system and reserve system by introducing a conversion coefficient, which can give a reasonable allocation by utilize the characteristics of energy storage system and reserve system.