Wind generating set, wind power generation and operation control method thereof

Abstract

The invention discloses a wind generating set, which comprises a wind wheel, a main shaft and a generator, wherein the wind wheel comprises a vane and a wheel hub. The vane root of the vane is fixed on the wheel hub; the wheel hub is connected with one end of the main shaft; the other end of the main shaft is connected with the generator through a transmitting mechanism; the vane has a telescopic structure, extends within a range of the preset low wind speed and retracts within a range of the preset high wind speed; and a propeller pitch changing system is arranged between the vane and the wheel hub, so that the vane can rotate around the shaft. The telescopic vane structure is adopted to correspondingly reduce set values of the rating wind speed and the rating power of a fan, make the work of the fan in most time of the whole year carry out in a rating generating state, and increase the generating time of full power in the whole year. The telescopic vane structure is combined with the propeller pitch changing system to adjust the output power and optimize the quality of power output by a wind power station. The adjusting and controlling range is wide and the mode is flexible. On the basis, the invention also discloses a wind generating system and an operating control method thereof.

Description

technical field [0001] The invention relates to the field of wind power generators, in particular to a wind power generator set, a wind power generation system and an operation control method thereof. Background technique [0002] Wind power is currently the largest and fastest growing renewable energy. With the acceleration of the growth rate of wind energy utilization, the single-unit scale of wind power generators (hereinafter referred to as wind turbines) is also increasing, and the current global average installed single-unit capacity has reached 2MW. [0003] The rated wind speed of this megawatt wind turbine is usually set at 12-14m / s, while the annual wind speed of the second and third types of wind farms, which account for the vast majority of domestic wind farms, only accounts for 7%-10% of the rated wind speed. , which makes the wind turbines work in the low-power power generation state for more than 90% of the time throughout the year; even for high-quality wind...

AI Technical Summary

Problems solved by technology

[0003] The rated wind speed of this megawatt wind turbine is usually set at 12-14m / s, while the annual wind speed of the second and third types of wind farms, which account for the vast majority of domestic wind farms, only accounts for 7%-10% of the rated wind speed. , which makes the wind turbines work in the low-power power generation state for more than 90% of the time throughout the year; even for high-quality wind farms, the wind turbines are equivalent to full-power power generation for less than 2,000 hours a year, which means that the average power generation load of the wind farm is less than the designed installed capacity. 1 / 4, resulting in a great waste of wind power generation capacity

[0004] Due to the instability of wind speed and direction and the fluctuation of wind turbine output power, each wind farm is an independent power plant, and its output power fluctuates greatly with the wind speed; Great harm, resulting in the inability of wind power to be connected to the grid on a large scale

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