Wind turbine generator protection method
A wind turbine and wind shearing technology, applied in wind power generation, wind turbines, wind turbine control, etc., can solve the problems of easy-to-clean towers, insufficient blade clearance, etc., and achieve less equipment, low cost, and high real-time performance. Effect
Pending Publication Date: 2021-09-07
HUANENG POWER INT INC +2
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Problems solved by technology
[0003] The present invention mainly aims to solve the problem that the blades are easy to sweep the tower due to insufficient headroom under strong negative wind shear wind conditions, and provides a wind turbine protection method, which monitors the vertical wind shear in real time through the airborne laser wind measuring radar. In the case of strong negative wind shear wind conditions, the wind turbines take protection actions based on the estimated vertical wind shear to avoid tower sweeping accidents due to insufficient blade clearance
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[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0033] like Figure 1-3 As shown, a wind turbine protection method includes the following steps: step S1) installing an airborne laser wind measuring radar 5 on the top of the wind turbine nacelle; step S2) setting the monitoring period T of vertical wind shear, the first Vertical wind shear threshold VShear1, the second vertical wind shear threshold VShear2 and number of presets N, the first vertical wind shear threshold VShear1 is less than the second vertical wind shear threshold VShear2; step S3) by airborne Type laser wind measuring radar 5 obtains original radial wind speed; Step S4) obtains beam surface wind speed according to original radial wind speed; Step S5) obtains real-time vertical wind shear VShear according to beam surface wind speed and beam surface vertical height; Step S6) In a monitoring cycle T of vertical wind shear, jud...
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The invention mainly aims at solving the problem that under the air condition with strong negative wind shear, blades are prone to sweeping a tower due to insufficient clearance, and discloses a wind turbine generator protection method. Vertical wind shear is monitored in real time through an airborne laser wind measurement radar, and under the air condition with the strong negative wind shear, a wind turbine generator takes a protection action according to the vertical wind shear obtained through evaluation. The wind turbine generator protection method comprises the following specific steps of obtaining an original radial wind speed through the radar, obtaining a light beam surface wind speed according to the original radial wind speed, obtaining the real-time vertical wind shear according to the light beam surface wind speed and the vertical height of a light beam surface, comparing the vertical wind shear with a first vertical wind shear threshold value and a second vertical wind shear threshold value, and when the vertical wind shear is larger than the second vertical wind shear threshold value, enabling the wind turbine generator to stop working, so that the tower sweeping accident caused by insufficient blade clearance is avoided, and the wind turbine generator is protected.
Description
technical field [0001] The invention relates to the technical field of wind power generation, in particular to a method for protecting a wind turbine. Background technique [0002] With the gradual depletion of energy sources such as coal and oil, human beings pay more and more attention to the utilization of renewable energy. As a clean renewable energy, wind energy has been paid more and more attention by countries all over the world. It is very suitable for coastal islands, grasslands, pastoral areas, mountainous and plateau areas that are short of water, fuel, and inconvenient to use wind power to generate electricity according to local conditions. Wind power generation refers to the use of wind turbines to convert the kinetic energy of wind into electrical energy. With the rapid development of my country's energy transformation and wind power generation technology, the development of complex wind farms such as low wind speed and high turbulence is proceeding rapidly. I...
Claims
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IPC IPC(8): F03D7/04F03D17/00G01S17/95
CPCF03D7/0268F03D7/0224F03D7/042F03D17/00G01S17/95F05B2270/32F05B2270/33F05B2270/8042Y02A90/10Y02E10/72
Inventor 张建军孙勇牛凤国杨劲夏彦喆崔长海李月成李学孔李帅王雪璐梁思超李东辉
Owner HUANENG POWER INT INC