Wind speed vector data simulation generation method considering multiple correlation

Abstract

The invention discloses a wind speed vector data simulation generation method considering multiple correlation. The method includes the steps that a correlation model between wind speed of two wind farms and wind direction of the two wind farms is set up according to the Copula theory, empirical distribution, the Weibull distribution model and a wind speed and wind direction condition dependent model which is set up through clustering, converting and other methods are adopted, a wind speed vector data generation model of the two wind farms is finally generated, and the wind speed vector data generation model has correlation and condition dependency. The wind speed vector data simulation generation method has the advantages that the multi-wind-farm wind speed and wind direction data generated in a simulation mode by adopting the wind speed vector data simulation generation method can keep the same multiple correlation and condition dependency as original data, further keep the same statistical property and the distribution property as the original data well and provide effective reference for the reliability analysis and research on wind farm resource assessment and an electric system containing wind energy.

Description

technical field [0001] The invention relates to a wind speed vector data generation method, in particular to a wind speed vector data simulation generation method considering multiple correlations, and belongs to the technical field of wind power generation. Background technique [0002] Energy such as wind energy and solar energy has been developed and utilized on a large scale in the world as clean and renewable energy. Especially in the development of wind energy resources, as of the end of 2012, the world's installed wind energy capacity reached 282.5GW, of which China reached 75.32GW; it is expected that the world's installed wind energy capacity will reach 418.7GW in 2015, of which China will reach 100GW. With the expansion of the scale of wind farms, multiple wind farms may be established in the same area, and the wind in these wind farms belongs to the same source wind energy, that is, the wind speed in the two wind farms is correlated, and the wind direction is also...

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Problems solved by technology

The influence of wind direction on the output power of the wind farm is considered in the existing reliability assessment of a single wind farm considering the wake effect, but the conditional dependence between them is not considered in the simulation of wind speed and wind direction samples

In addition, the existing power system reliability evaluation studies that take into account the correlation of wind speed have not considered the wake effect between wind turbines, let alone the influence of wind direction.

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