Method for grouping wind generating sets by taking input wind speed and random fluctuation of wind direction of wind farm into consideration

Abstract

The invention discloses a method for grouping wind generating sets, which takes the input wind speed and the random fluctuation of wind direction of a wind farm into consideration as well as wake effect among the wind generating sets, and then provides the method for grouping the wind generating sets by using the correlation coefficients of the wind generating sets. The technical scheme of the method is as follows: considering the wake effects among the wind generating sets and then determining the input wind speeds of the wind generating sets; studying the influence of wind direction change on the input wind speed of the wind generating set; calculating the correlation coefficients of the wind generating sets in each wind speed and wind direction intervals of the wind farm so as to obtain a three-dimensional correlation coefficient matrix; and in each wind speed interval under a same wind direction, arranging the wind generating sets with the same correlation coefficients into a group so as to complete the process of grouping the wind generating sets. The method overcomes the influences of the actions (grouping the wind generating sets without considering the influences of the wind speed and wind direction changes and the wake effects between the wind generating sets or only according to one of the factors above) on wind generating set grouping; and by using the method of the invention, the grouping situation of the wind generating sets can be inquired easily when the wind speed and the wind direction change, and the equivalent input wind speed of each wind generating set can be calculated so as to build a stochastic model of the wind farm and then determine the output power of the wind farm; the output characteristics of the wind farm connected to the grid and the influence on the operation characteristics of the grid are studied, and accurate wind power data can be provided for the electric network management departments.

Description

technical field [0001] The invention relates to a method for grouping wind turbines, in particular to a method for grouping wind turbines considering random fluctuations in wind speed and direction of wind farm input and wake effects between wind turbines, which is used for modeling and grid-connected analysis of large wind farms. Background technique [0002] With the rapid development of wind power generation in my country in recent years, the research and evaluation of wind farm access to the power system, and the research on the ability of the system and key nodes to receive wind power are important issues that need to be solved urgently in the current development of wind power. From the perspective of the power system, the research on the wind farm is not concerned with the characteristics of each wind turbine inside the wind farm, but the dynamic characteristics of the wind farm as a whole and its impact on the power system. Therefore, when the wind farm is connected t...

AI Technical Summary

Problems solved by technology

[0010] To sum up, when grouping wind turbines, the influence of random changes in the input wind speed and wind direction of the wind farm and the wake effect between wind turbines on the grouping of wind turbines is not considered.

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