Equivalence method of direct-drive-type wind turbine generator wind power plant

Abstract

The invention relates to an equivalence method of a direct-drive-type wind turbine generator wind power plant. The equivalence method includes the following steps: direct-drive-type wind turbine generators are clustered, equivalence is carried out on dynamic parameters of the direct-drive-type wind turbine generators in a capacity weighing mode, equivalence is carried out on electricity collection circuits of the direct-drive-type wind turbine generator wind power plant, and simulation is carried out on the direct-drive-type wind turbine generators. The equivalence method defines the clustering index of operation characteristics of the direct-drive-type wind turbine generators, and clustering is carried out through a clustering algorithm. Equivalence is carried out on wind turbine parameters of the wind turbine generators of the same cluster through invariance of power switching characteristics of a wind turbine of an equivalent machine and a single wind turbine generator, static equivalence is carried out on the electricity collection circuits of the wind power plant due to the fact that the sum of output power of wind turbine generators which are equalized is equal to the output power of the equivalent machine, and a model reference self-adaptive algorithm is applied to recognize impedance parameters of a permanent magnet motor of the equivalent machine. The operation characteristics of grid connection points of the wind power plant before and after equivalence are consistent, and the equivalence algorithm accurately reflects the grid connection characteristics of the direct-drive-type wind turbine generator wind power plant.

Description

technical field [0001] The invention relates to an equivalent method of a direct-drive wind turbine, in particular to a wind farm equivalent method of a direct-drive wind turbine. Background technique [0002] Wind farms are usually composed of wind turbines of the same type. In the calculation of large-scale interconnected grids, if a detailed wind farm model is used, that is, to model each wind turbine, the scale of data will be increased, which will affect the speed and convergence of the algorithm, and the validity of the model will not be guaranteed . If the entire wind farm is equivalent to a wind turbine, the accuracy of the algorithm will not be guaranteed. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the present invention provides a wind farm equivalent method for direct-drive wind turbines. The equivalent method defines clustering indicators that can reflect the operating characteristics of direct-drive wind turbines. The win...

AI Technical Summary

Problems solved by technology

In the calculation of large-scale interconnected grids, if a detailed wind farm model is used, that is, to model each wind turbine, the scale of data will be increased, which will affect the speed and convergence of the algorithm, and the validity of the model will not be guaranteed

If the entire wind farm is equivalent to a wind turbine, the accuracy of the algorithm will not be guaranteed

Images