Wake flow analysis system and method for wind driven generator

Abstract

The invention discloses a wake flow analysis system and method for a wind driven generator. The system comprises a system model which comprises an iron tower height index, a hub height index, a single-machine capacity index, an impeller diameter index, and a tower crane distance index, and the range of the iron tower height index is 30m-100m; the height index of the hub is 90-150 m; the capacity index of a single machine is 2000-3000 kW; the diameter index of the impeller is 110-141 m; and the distance index of the tower crane is 200-400m. According to the invention, high-accuracy, comprehensive and convenient visual post-processing of acquired data can be realized, so that the system has certain advantages, the system model is short in calculation time and simple to operate, the precisionrequired by engineering can be met, and the system is very suitable for the problems of optimal arrangement of wind turbines in a wind power plant, influence of wake flow on the wind turbines and thelike; compared with a wind tunnel experiment and numerical simulation, the fan wake flow model has certain advantages in the aspects of fan design and optimal arrangement of a wind power plant, and due to the use of the wake flow model, the wake flow speed calculation efficiency can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of wind power generators, and in particular relates to a wake analysis system and method of a wind power generator. Background technique [0002] Wind tunnel experiments and on-site measurements were the main methods used to study fan wakes before the advent of computers. As early as 1981, the Swedish Aeronautical Research Institute (FFA) used the flow visualization method to display the wake trajectory of the fan wake through wind tunnel experiments, and then carried out related research on the wake information displayed by the flow trajectory. HandM and Hu Danmei also measured the wake velocity through experiments, backcalculated the resistance of the fan to the flow domain, and then carried out research on the flow field characteristics of the near wake region and the far wake region of the fan, and carried out a detailed analysis of the experimental results. analyze. Schepers and K.Boorsma carried out ...

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Problems solved by technology

[0004] 1. It can only measure the wind farm wind turbines that have been built, and cannot predict the wind farm wind turbines that have not been built;

[0005] 2. Due to the limited places for measurement and recording, only partial information of the wind field can be obtained, but not all information of the wind field;

[0006] 3. The method of experimentation and actual measurement has a long research cycle, large initial investment, and consumes a lot of financial resources

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