Power system economic dispatching method containing multiple wind power plants

Abstract

The invention provides a power system economic dispatching method containing multiple wind power plants. The power system economic dispatching method comprises the following steps: S1) according to wind power prediction data and prediction error distribution characteristics in a dispatching period, obtaining a possible capacity scene of each wind power plant, and calculating a scene probability; S2) reducing the scenes of all wind power plants according to the same method, and calculating the scene probability after reduction is carried out; S3) combining all the scenes of which the wind power plants are reduced, and reducing the scenes into a plurality of typical scenes; S4) establishing a target function of the power system economic dispatching method; S5) establishing constraint conditions including load balance constraints, rotary backup contain constraints, the top and bottom limitation constraints of unit capacity, unit ramp rate constraints and minimum startup-shutdown constraints; S6) carrying out solving via a mixed integer programming method. The power system economic dispatching method provided by the invention is suitable for solving the economic dispatching problem containing multiple wind power plants, and calculation difficulty generated when the scenes of the multiple wind power plants are reduced is lowered.

Description

technical field [0001] The invention relates to the technical field of power system scheduling automation, in particular to a dynamic economic scheduling method suitable for a power system containing multiple wind farms. Background technique [0002] Energy and environmental problems have prompted the rapid development of new energy power including wind power. Wind power has intermittent and strong random fluctuations. Its large-scale grid connection brings huge challenges to traditional power grid scheduling. The economic scheduling of power systems including wind farms It has also become a research hotspot at home and abroad. When modeling the economic dispatch of a power system with wind farms, due to the large error in the predicted value of wind power output, it is necessary to conduct a probabilistic analysis of the uncertainty of the output power of the wind farm. Determine the important method of modeling. The generation of scene tree mainly describes the possible o...

AI Technical Summary

Problems solved by technology

In the existing scenario-based methods for solving the dynamic economic dispatch problem of power systems with wind farms, the number of wind farms is generally small, so the difficulty of scene reduction is relatively small; when the number of grid-connected wind farms in the system is large, Scenario reduction has become a difficult point in solving the dynamic economic dispatching problem of power systems with wind farms using the scenario method

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