Method for calculating input wind speed of wind generating sets according to wake effect in wind power station

Abstract

The invention discloses a method for calculating the input wind speed of wind generating sets, and provides the method for calculating the input wind speed of the wind generating sets according to the factors, such as the wake effect, arrangement of the wind generating sets and the like in a wind power station. A technical scheme comprises the following steps of: converting a coordinate of a wind blown direction of the wind power station according to the arrangement of the wind generating sets, and determining a sequence of the wind speed obtained by the wind generating sets; calculating the input wind speed of the wind generating sets according to the wake effect among the wind generating sets; simulating the wind speed to obtain the input wind speed of each wind generating set in the wind power station in any wind blown direction; and calculating the output power of the wind power station by using the input wind speed of each wind generating set in the wind power station, and comparing the output power with the measured power of the wind power station, wherein a validation method is reasonable. The input wind speed of the wind generating sets obtained by the method not only can be used for grouping the wind generating sets so as to establish a dynamic model of the wind power station to analyze the dynamic characteristic of the wind power station, but also provides more accurate wind power data for rationally arranging the production plan for a power dispatching department and reducing the reserve capacity of a system.

Description

technical field [0001] The invention relates to a method for calculating the input wind speed of a wind power unit, in particular to a method for calculating the input wind speed of a wind power unit considering the wake effect in a wind farm, which is used for modeling and grid-connected analysis of large-scale 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. In the analysis, it is impossible and unnecessary t...

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Problems solved by technology

[0004] At present, in the analysis of most wind farms connected to the power system, factors such as the wind speed and direction of the wind and the electrical wiring in the wind farm are generally not considered, and the wind farm is equivalent to a capacity equal to the installed capacity of the wind farm. When studying the dynamic characteristics of wind farms with fluctuating wind speeds and their impact on the power system, it is assumed that all wind turbines have the same input wind speed, and the wind speed model adopted is a typical gust, Gradient and random wind models

This method of processing wind farms is more suitable for studying the dynamic characteristics of wind farms with a small installed capacity, but when the installed capacity of the wind farm is large and the number of wind turbines is large, this processing method may not be able to accurately describe the dynamic characteristics of the wind farm. characteristic

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