Method, device and system for determining angle-to-wind deviation and correcting angle-to-wind

Patent metadata

Field	Value
Publication number	US-11359601-B2
Application number	US-201816768040-A
Country	US
Kind code	B2
Filing date	Jul 11, 2018
Priority date	Feb 28, 2018
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

A method, device and system for determining angle-to-wind deviation and correcting angle-to-wind; the method for determining angle-to-wind deviation comprises: obtaining historical operation data of a wind turbine group during a specific time period (S101); determining an angle-to-wind deviation value for each wind speed segment on the basis of the acquired historical operation data (S102); for any wind speed segment, determining the angle-to-wind deviation value on the basis of the actual angle-to-wind measurement value and the output power value of an environmental wind speed value at a time point within the specific time period.

First claim

The invention claimed is:

1. A method for determining a deviation in a wind alignment angle of a wind turbine, comprising:
obtaining historical operation data of the wind turbine within a time period, wherein the historical operation data comprise ambient wind speeds, detected wind alignment angles, and output power that are at different moments in the time period;
dividing a predetermined windspeed range into M windspeed sections with a first predetermined interval, wherein M is a positive integer;
dividing a predetermined angle range into N angle sections with a second predetermined interval, wherein N is a positive integer; and
for an i-th windspeed section with i being a positive integer and 0<i≤M, determining a deviation in the wind alignment angle for the i-th windspeed section based on one or more corresponding detected wind alignment angles and corresponding output power at one or more moments within the time period, wherein one or more corresponding ambient wind speeds at the one or more moments belong to the i-th windspeed section, and
wherein the deviation in the wind alignment angle for the i-th windspeed section is determined further based on average power of each angle section corresponding to the i-th windspeed section by:
obtaining a deviation in the wind alignment angle for each pair of symmetrical angle sections corresponding to the i-th windspeed section, wherein each pair of symmetrical angle sections comprises two angle sections that are symmetrical with respect to a reference angle section, and the reference angle section is one of the N angle sections; and
determining the deviation in the wind alignment angle for the i-th windspeed section based on the obtained deviation in the wind alignment angle for each pair of symmetrical angle sections.

2. The method according to claim 1 ,
wherein average power P ij of a j-th angle section corresponding to the i-th windspeed section is an average of output power at at least a subset of the moments at each of which the ambient wind speed belongs to the i-th windspeed section and the detected wind alignment belongs to the j-th angle section, wherein j is an integer and 0<j≤N.

3. The method according to claim 2 , further comprising: determining abnormal data in the obtained historical operation data for each windspeed section; and deleting the determined abnormal data, wherein determining the deviation in the wind alignment angle for the windspeed section is based on the historical operation data from which the abnormal data is deleted; wherein determining the abnormal data in the obtained historical operation data for each windspeed section comprises: determining the ambient wind speeds, the detected wind alignment angles, and the output power at the subset of the moments, at each of which the ambient wind speed belongs to the i-th windspeed section and the detected wind alignment angles belongs to the j-th angle section, as the abnormal data for the i-th windspeed section, when at least one of the following is satisfied: a quantity of the subset of the moments is less than a second preset threshold; or, a standard deviation of output power at the subset of the moments is greater than a third preset threshold.

4. The method according to claim 1 , wherein obtaining the deviation in the wind alignment angle for each pair of symmetrical angle sections corresponding to the i-th windspeed section comprises:
for each pair of symmetrical angle sections corresponding to the i-th windspeed section, determining the deviation in the wind alignment angle for the pair of symmetrical angle sections based on average power of both angle sections that are comprised in the pair of symmetrical angles.

5. The method according to claim 1 , wherein obtaining the deviation in the wind alignment angle for each pair of symmetrical angle sections corresponding to the i-th windspeed section comprises:
for a k-th pair of symmetrical angle sections corresponding to the i-th windspeed section and comprising angle sections k 1 and k 2 , obtaining average power P i(k 1 ) and P i(k 2 ) of the angle sections k 1 and k 2 , respectively; and
calculating the deviation α i(k) in the wind alignment angle for the k-th pair of symmetrical angle sections based on:

α

i
⁡

(
k
)

=

cos

-
1

⁢

P

i
⁡

(
ref
)

1
3

(

P

i
⁡

(
ref
)

2
3

-

P

i
⁡

(

k
1

)

1
3

⁢

P

i
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(

k
2

)

1
3

1
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Assignees

• Beijing Goldwind Science & Creation Windpower Equipment Co Ltd
• Beijing Gold Wind Science & Creation Windpower Equipment Co Ltd

Inventors

• Xue Jianguo

Classifications

• F05B2270/335

  Output power or torque · CPC title

• F03D7/0204 Primary

  for orientation in relation to wind direction · CPC title

• F05B2270/802

  Calibration thereof · CPC title

• F03D17/00 Primary

  Monitoring or testing of wind motors, e.g. diagnostics (testing during commissioning of wind motors F03D13/30) · CPC title

• F05B2270/321

  Wind directions · CPC title