Wind generating set for high-altitude areas

Abstract

The invention provides a wind generating set for high-altitude areas, comprising impellers, wherein the diameter of the impellers is 5-9% larger than that of the impellers of a plain type wind generating set of the same generating area level. By adopting the wind generating set for high-altitude areas, provided by the invention, the power output of the wind generating set under rated wind speed can be improved and rated wind speed is correspondingly improved, therefore, the wind generating set can be prevented from entering a stall condition due to the increase of the rated wind speed when working in the high-altitude areas and the disastrous accident of the blown-down wind generating set can be further avoided; meanwhile, the wind generating set also has higher power output and annual energy output when working in the high-altitude areas.

Description

technical field [0001] The invention relates to wind power generation technology, in particular to a wind power generating set which can work stably in high altitude areas and has relatively high annual power generation. Background technique [0002] As a kind of clean energy, wind energy plays an increasingly important role in international energy conservation and emission reduction, and as an energy conversion device for wind energy and electric energy - wind turbines play an increasingly important role in my country's manufacturing industry. [0003] More than 90% of the wind power projects that have been developed in my country are concentrated in non-high-altitude areas; while the western high-altitude areas with relatively good wind resources, such as Qinghai, Tibet, and Yunnan, have not yet realized installed capacity or only a few installed capacity. There are very few wind power projects in China. Therefore, the technology of plain-type wind turbines suitable for no...

AI Technical Summary

Problems solved by technology

When the wind turbine works at a high altitude area, the output power decreases due to the decrease of air density, and the impeller of the wind turbine may not be able to reach the rated power before the blade stalls, so the pitch angle of the blade will not be actively changed. As the wind speed continues to increase, the blades enter a deep stall state. At this time, the pitch control system cannot judge the pitch angle of the blades according to the aerodynamic power of the impellers, resulting in the failure of the wind turbine to work normally.

The thrust load of wind turbines continues to increase with the increase of wind speed, which can easily lead to catastrophic accidents where wind turbines are blown down

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