Operation control method of wind power generation

Abstract

The invention discloses a running and control method of a wind generating system, which comprises the following steps: when a current wind speed is more than a cut-in wind speed and less than a rated wind speed in a wind farm, stretching blades to a maximum length; when the current wind speed is more than the rated wind speed and less than a cut-out wind speed in the wind farm, folding the blades and switching propellers; when the current wind speed is less than the cut-in wind speed or more than the cut-out wind speed, feathering and folding the blades to the shortest, stopping grid-connected generation. The method of the invention can improve the maximum annual power generation of the wind farm and optimize the power quality output by the wind farm.

Description

technical field [0001] The invention relates to the field of wind power generators, in particular to an operation control method for a wind power generation system. 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 farms, the wind turbines can genera...

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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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