CN-116221018-B - Blade adjusting method and device of wind driven generator and wind power generation system

Abstract

The application discloses a blade adjusting method and device of a wind driven generator and a wind power generation system, and belongs to the technical field of wind power generation. The blade adjustment method of the wind driven generator comprises the steps of determining a plurality of blade adjustment schemes based on first pitch angles and first yaw directions corresponding to all time periods in a plurality of future time periods, determining first predicted powers of the wind driven generator corresponding to all blade adjustment schemes based on second pitch angles and second yaw directions, obtaining target pitch angles and target yaw directions corresponding to the target future time periods based on the predicted wind speeds, rated wind speeds, maximum first predicted powers in the first predicted powers, first actual output powers in the current time periods and second predicted powers of the wind driven generator corresponding to the target future time periods in the plurality of future time periods, and adjusting the blades of the wind driven generator based on the target pitch angles and the target yaw directions. The blade adjusting method of the wind driven generator has higher adjusting accuracy.

Inventors

• CHEN JIANKAI
• ZHANG JIAN
• WANG WEI

Assignees

• 阳光新能源开发股份有限公司

Dates

Publication Date

20260512

Application Date

20230315

Claims (9)

1. 1. A method of blade adjustment for a wind turbine, comprising: determining a plurality of blade adjustment schemes based on a first pitch angle and a first yaw direction corresponding to each of a plurality of future time periods, each blade adjustment scheme including a second pitch angle and a second yaw direction, wherein the first pitch angle and the first yaw direction are determined based on actual wind data of a current time period; determining a first predicted power of the wind driven generator corresponding to each blade adjustment scheme based on the second pitch angle and the second yaw direction; Acquiring a target pitch angle and a target yaw direction corresponding to a target future period based on a predicted wind speed, a rated wind speed, a maximum first predicted power of a plurality of first predicted powers, a first actual output power of the current period and a second predicted power of a wind driven generator corresponding to the target future period in the plurality of future periods, wherein the predicted wind speed is determined based on the actual wind data, and the second predicted power is determined based on the first pitch angle and the first yaw direction corresponding to the target future period; Adjusting blades of the wind driven generator based on the target pitch angle and the target yaw direction; The obtaining, based on the predicted wind speed, the rated wind speed, the maximum first predicted power of the plurality of first predicted powers, the first actual output power of the current period, and the second predicted power corresponding to the target future period, the target pitch angle and the target yaw direction corresponding to the target future period, includes: Acquiring a first difference degree of the first actual output power and the maximum first predicted power and a second difference degree of the first actual output power and the second predicted power under the condition that the predicted wind speed is larger than the rated wind speed; determining the target pitch angle and target yaw direction based on a maximum difference between the first difference and the second difference and a target sensitivity; Determining the target pitch angle and the target yaw direction based on a second yaw direction corresponding to the maximum first predicted power and the blade angle in the current period when the predicted wind speed is not greater than the rated wind speed, and determining the target pitch angle and the target yaw direction based on a maximum difference between the first difference and the second difference and a target sensitivity, comprising: when the maximum difference is greater than the target sensitivity, determining a second pitch angle corresponding to the maximum first predicted power as the target pitch angle, and determining a second yaw direction corresponding to the maximum first predicted power as a target yaw direction; determining a blade angle corresponding to the current period as the target pitch angle and determining a yaw direction corresponding to the current period as the target yaw direction under the condition that the maximum difference is not greater than the target sensitivity; The determining the target pitch angle and the target yaw direction based on the blade angle in the current period and the second yaw direction corresponding to the maximum first predicted power includes: Under the condition that the attack angle corresponding to the blade angle in the current period is the maximum attack angle, determining the blade angle as the target pitch angle, and determining the second yaw direction corresponding to the maximum first predicted power as the target yaw direction; And under the condition that the attack angle corresponding to the blade angle in the current period is not the maximum attack angle, determining the maximum attack angle as the target pitch angle, and determining the second yaw direction corresponding to the maximum first predicted power as the target yaw direction.
2. 2. The method of claim 1, wherein determining a plurality of blade adjustment schemes based on the first pitch angle and the first yaw direction corresponding to each of the plurality of future time periods comprises: determining a first pitch range based on a minimum pitch angle and a maximum pitch angle of the plurality of first pitch angles; determining a first yaw range based on a minimum yaw direction and a maximum yaw direction of the plurality of first yaw directions; dividing the first pitch range and the first yaw range based on target step length to obtain a plurality of second pitch angles and second yaw directions, wherein the difference between any two second pitch angles is the target step length of integer times, and the difference between any two second yaw directions is the target step length of integer times; And recombining any one of the plurality of second pitch angles and any one of the plurality of second yaw directions to obtain the plurality of blade adjustment schemes.
3. 3. The blade adjustment method of a wind power generator according to claim 1, wherein after adjusting the blades of the wind power generator based on the target pitch angle and the target yaw direction, the method further comprises: acquiring a second actual output power of the wind driven generator in the target future period; At least one of the first pitch angle, the first yaw direction, and the second predicted power is modified based on a third degree of difference between the second actual output power and the maximum first predicted power.
4. 4. The blade adjustment method of a wind power generator according to claim 1, wherein after adjusting the blades of the wind power generator based on the target pitch angle and the target yaw direction, the method further comprises: Under the condition that the target future period is changed to a current period, determining a third pitch angle and a third yaw direction corresponding to each period in a plurality of future periods based on actual wind data corresponding to the current period; Performing averaging processing on a first pitch angle corresponding to a target future period and a third pitch angle corresponding to the target future period in the plurality of future periods to obtain a fourth pitch angle corresponding to the target future period; averaging the first yaw direction corresponding to the target future period and the third yaw direction corresponding to the target future period in the plurality of future periods to obtain a fourth yaw direction corresponding to the target future period; And updating a plurality of first pitch angles corresponding to the plurality of future time periods based on the plurality of fourth pitch angles and the third pitch angle, and updating a plurality of first yaw directions corresponding to the plurality of future time periods based on the plurality of fourth yaw directions and the third yaw directions.
5. 5. The method of blade adjustment for a wind turbine of claim 1, wherein prior to adjusting the blades of the wind turbine based on the target pitch angle and the target yaw direction, the method further comprises: And reducing the attack angle corresponding to the current period under the condition that the probability that the predicted wind speed corresponding to the target future period is larger than the strong wind threshold value is larger than the target probability threshold value.
6. 6. A blade adjustment device of a wind power generator based on the blade adjustment method of a wind power generator according to any one of claims 1 to 5, characterized by comprising: The system comprises a first processing module, a second processing module and a third processing module, wherein the first processing module is used for determining a plurality of blade adjustment schemes based on a first pitch angle and a first yaw direction corresponding to each time period in a plurality of future time periods, and each blade adjustment scheme comprises a second pitch angle and a second yaw direction, wherein the first pitch angle and the first yaw direction are determined based on actual wind data of the current time period; The second processing module is used for determining first predicted power of the wind driven generator corresponding to each blade adjustment scheme based on the second pitch angle and the second yaw direction; The system comprises a first processing module, a second processing module and a third processing module, wherein the first processing module is used for acquiring a target pitch angle and a target yaw direction corresponding to a target future period based on a predicted wind speed, a rated wind speed, the maximum first predicted power in a plurality of first predicted powers, a first actual output power in the current period and a second predicted power of a wind driven generator corresponding to the target future period in the plurality of future periods, wherein the predicted wind speed is determined based on the actual wind data, and the second predicted power is determined based on the first pitch angle and the first yaw direction corresponding to the target future period; And a fourth processing module for adjusting the blades of the wind turbine based on the target pitch angle and the target yaw direction.
7. 7. A wind power generation system, comprising: A wind power generator; the blade adjustment device of a wind power generator according to claim 6, wherein the blade adjustment device of the wind power generator is electrically connected to the wind power generator.
8. 8. A non-transitory computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements a blade adjustment method of a wind turbine according to any of claims 1-5.
9. 9. A computer program product comprising a computer program, characterized in that the computer program, when executed by a processor, implements a method for blade adjustment of a wind turbine according to any of claims 1-5.

Description

Blade adjusting method and device of wind driven generator and wind power generation system Technical Field The application belongs to the technical field of wind power generation, and particularly relates to a blade adjusting method and device of a wind power generator and a wind power generation system. Background In the running process of the wind driven generator, when strong wind and other conditions are met, the blades of the wind driven generator need to be adjusted. In the prior art, the prediction system outputs the predicted wind data of the future period based on the wind data of the current period, and predicts the pitch angle and the yaw direction of the future period based on the control system, but the accuracy and the precision of the pitch angle and the yaw direction predicted by the technique are not high, an effective pitch strategy and a wind strategy cannot be provided for the blades of the wind driven generator, the blades can be damaged under the emergency, the service lives of structural components of the wind driven generator can be reduced by frequent adjustment, and the generated energy is reduced. Disclosure of Invention The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the blade adjusting method and device for the wind driven generator and the wind driven generator system can predict the blade adjusting target, enable the blade to act in advance, are high in control accuracy and precision, avoid damage of the blade under emergency conditions, avoid unnecessary adjustment, prolong the service life of each structural component of the wind driven generator, and improve wind power generation capacity. In a first aspect, the present application provides a method for adjusting a blade of a wind turbine, the method comprising: determining a plurality of blade adjustment schemes based on a first pitch angle and a first yaw direction corresponding to each of a plurality of future time periods, each blade adjustment scheme including a second pitch angle and a second yaw direction, wherein the first pitch angle and the first yaw direction are determined based on actual wind data of a current time period; determining a first predicted power of the wind driven generator corresponding to each blade adjustment scheme based on the second pitch angle and the second yaw direction; Acquiring a target pitch angle and a target yaw direction corresponding to a target future period based on a predicted wind speed, a rated wind speed, a maximum first predicted power of a plurality of first predicted powers, a first actual output power of the current period and a second predicted power of a wind driven generator corresponding to the target future period in the plurality of future periods, wherein the predicted wind speed is determined based on the actual wind data, and the second predicted power is determined based on the first pitch angle and the first yaw direction corresponding to the target future period; and adjusting the blades of the wind driven generator based on the target pitch angle and the target yaw direction. According to the blade adjusting method of the wind driven generator, the first pitch angle and the first yaw direction corresponding to each time period in the future time periods are subjected to secondary treatment to determine the target pitch angle and the target yaw direction corresponding to the target future time period, and then the blade of the wind driven generator is adjusted based on the target pitch angle and the target yaw direction, so that the blade adjusting target can be predicted, the blade can act in advance, the adjusting accuracy and the adjusting accuracy are high, the blade damage under the emergency condition is avoided, meanwhile, unnecessary adjustment is avoided, the service life of each structural component of the wind driven generator is prolonged, and the wind power generation capacity is improved. According to an embodiment of the present application, a method for adjusting a blade of a wind turbine, the method for obtaining a target pitch angle and a target yaw direction corresponding to a target future period based on a predicted wind speed and a rated wind speed of the target future period, a maximum first predicted power of the plurality of first predicted powers, a first actual output power of the current period, and a second predicted power corresponding to the target future period, includes: Acquiring a first difference degree of the first actual output power and the maximum first predicted power and a second difference degree of the first actual output power and the second predicted power under the condition that the predicted wind speed is larger than the rated wind speed; determining the target pitch angle and target yaw direction based on a maximum difference between the first difference and the second difference and a target sensitivity; and under the condition that the predic