Fan power generation power early warning method based on wind speed power curve

Abstract

The invention relates to a fan power generation power early warning method based on a wind speed power curve, relates to the technical field of power generation, and aims at solving the technical problems for reducing the cost and improving the judging accuracy. The method comprises the following steps of: firstly acquiring a wind speed power curve corresponding table of all fans in a wind power plant, forming a large-power fan group through the fans with large generation power, sequentially calculating the average value of the generation power, the theoretical generation capacity and the power deviation ratio of the large-power fan group, inquiring the theoretical power of each fan according to the real-time wind speed of each fan, calculating the correction power of each fan in the wind power plant according to the inquired value and the inquired power deviation ratio, calculating an early warning difference value of each fan in the wind power plant according to the correction power, the real-time generation power and the maximal rated generation power of each fan, judging whether each fan is abnormal in generation power or not according to the early warning difference value of each fan, and appropriately issuing an alarm. By adopting the method, the accuracy for judging the abnormality of the power generation of each fan is high.

Description

technical field [0001] The invention relates to wind power generation technology, in particular to a wind speed power curve-based wind power generation power warning method. Background technique [0002] When the wind turbines in the wind farm operate normally, the power generated is related to the wind resources of the wind farm, the location of the wind farm, and the operating status of the wind turbine subsystem. of power generation. In order to facilitate the description of the power generation of wind turbines under ideal conditions, usually each type of wind turbine will provide a wind speed-power curve correspondence table to intuitively describe the relationship between wind power generation and wind speed. [0003] Each type of fan has a certain nonlinear relationship between its power generation and wind speed when each subsystem is working normally. Since wind power generation includes multiple mechanical systems, there is a large energy transfer loss. When the ...

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Problems solved by technology

[0004] It is an important factor to ensure the normal operation of the wind farm to discover and deal with the wind turbines with abnormal power generation in time. The existing wind turbine power generation abnormality warning system needs to use sensors to collect many state quantities of each subsystem in each wind turbine to judge the status of each wind turbine. In the working state, a large amount of information needs to be input, and the implementation cost is also high. The large amount of information will also cause large errors, and the accuracy of judging the abnormality of wind power generation is also low.

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