A wind farm grid-connected capacity determination method considering voltage constraints

Abstract

The invention discloses a wind farm integration capacity determination method in consideration of voltage constraints. The method comprises steps: according to different fan types in the wind farm, a corresponding wind farm integration model is built, and short circuit capacity at the wind farm integration point is calculated at the selected wind farm integration point position in the wind farm integration model; according to the ratio of the wind farm rated capacity to the short circuit capacity at the wind farm integration point, maximal short circuit capacity ratios of the wind farm in a plurality of different voltage constraint conditions at the integration point are obtained; according to the minimal value in the maximal short circuit capacity ratios of the wind farm in different voltage constraint conditions at the integration point, the maximal short circuit capacity ratio of the fan at the wind farm integration point when different voltage constraint conditions are integrated is acquired; and according to a product of the short circuit capacity at the wind farm integration point and the maximal short circuit capacity ratio at the wind farm integration point when different voltage constraint conditions are integrated, the maximal access capacity of the integration wind farm is obtained.

Description

technical field [0001] The invention belongs to the field of power systems, and in particular relates to a method for determining the grid-connected capacity of a wind farm considering voltage constraints. Background technique [0002] With the development of social economy and people's concern about global warming and atmospheric environmental pollution, new energy power generation has increasingly become a widely accepted form of power generation. Among them, with the continuous improvement of wind power generation and grid-connected technology, the installed capacity of grid-connected wind power has increased year by year. So far, the country has approved the construction of nine 10 million-kilowatt wind power bases. However, with the large-scale and centralized development of wind power, the problems of grid connection and consumption of wind power have emerged. Most of the areas with rich wind energy resources in China are far away from the load center and located at t...

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Problems solved by technology

[0004] At present, the stability analysis of multiple wind farms in the region is often carried out, and the analysis of the capacity of a single wind farm is lacking. In actual grid planning and engineering practice, the determination of the capacity of a single wind farm has stronger practical significance

Moreover, the existing data are mostly analyzed from the perspective of frequency regulation and peak regulation of wind power power systems, or through the analysis of single power flow calculation results

However, in the actual power system, wind farms are mostly at the end of the system, the grid structure is weak, and the voltage stability problem caused by wind power grid connection is more prominent. Therefore, it is necessary to fully analyze the relationship between wind power grid connection capacity and voltage stability from multiple perspectives

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