Wind power optimal scheduling method based on power forecast

Abstract

The invention provides a wind power optimizing scheduling method based on power forecast, which is applied to a power scheduling operation schedule solution containing wind power. In the method, the power forecast curve of a wind power station are utilized; the peak regulation capacity and the safe and stable limit of a system are calculated, so that scheduling of total output of the wind power within the scheduling range is divided into restricted time interval scheduling and non-restricted time interval scheduling; for the non-restricted time interval scheduling, the error scope of the forecast power generation is considered based on a forecast power generation curve; and for the restricted time interval scheduling, wind power forecast errors are considered based on the restriction of the aggregate limit of the wind power stations and the forecast power generation output of each wind power station, thus optimizing power generation power limit value allocation of each wind power station, so that the system can maximally digest the wind power under the condition of meeting the requirement of safe and stable operation. A wind power scheduling curve is executed by the power generation of the wind power station so as to strength safety and stability of the power grid operation, intensify the digestion capacity of the wind power and maximally utilize the wind power.

Description

technical field [0001] The invention belongs to the field of new energy power generation, and relates to a wind power optimization scheduling method based on power prediction. Background technique [0002] The power system is a complex dynamic system, and its safe and stable operation essentially requires a balance between power generation and load demand at all times. If the power system cannot be effectively controlled and there is an imbalance between supply and demand, it will affect the reliable power consumption of the load and may even cause a large-scale accident in the system. [0003] Wind power generation has the characteristics of intermittent and randomness. Large-scale wind power generation grid connection has a great impact on the safe and stable operation of the power system. Other stable power sources in the system must follow the fluctuations of wind power output like load tracking. . When the ratio of wind power generation to the maximum load of the powe...

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Problems solved by technology

[0007] Chinese Patent Application No. 200820228501.5, Invention Name: A Wind Power Dispatch Decision Support Device, Publication No.: 201369575, discloses a wind power dispatch decision support device, which can realize wind power grid power prediction, wind power grid-connected operation power grid peak regulation capability analysis and wind power Grid-connected operation grid safety decision support system has three functions. However, this device: (1) finally gives the operating status and on-grid power of all wind turbines, which can still be realized in grids with small wind power scale. The amount of data to be processed is huge, and the operability is not strong

This patent adopts a hierarchical and grading method. The dispatching department only provides the operating status and on-grid power of each wind farm, and the optimization of the operating status and on-grid power of the wind turbines is completed at the station side; (2) The impact of forecasting errors on dispatching decisions is not considered This patent comprehensively considers wind power prediction errors and load prediction errors to formulate reserve capacity, and also considers the influence of prediction errors when optimizing wind farm power distribution; (3) does not provide a plan for optimizing the distribution of wind farm output and wind turbine output , this topic proposes an optimization algorithm for wind farm power generation during wind power limited periods

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