Control method and control apparatus of wind power generator set

A control apparatus of a wind power generator set, comprising a processor and a non-transitory storage medium having a plurality of instructions stored thereon that, when executed by the processor, cause the processor to:

• acquire a wind speed at a location of the wind power generator set, calculate turbulence intensity according to the wind speed, and determine a wind speed distribution range corresponding to the turbulence intensity;
• determine a thrust variation amplitude of the thrust in the wind speed distribution range based on a relationship among the thrust suffered by a wind wheel of the wind power generator set, a thrust coefficient and the wind speed;
• wherein the acquiring a wind speed at a location of the wind power generator set, calculating turbulence intensity according to the wind speed and determining a wind speed distribution range corresponding to the turbulence intensity comprises:
• acquiring a wind speed at the location of the wind power generator set in a preset period, and calculating an average wind speed v in the preset period;
• calculating the turbulence intensity
• I
• =
• δ
• v
• _
• =
• 1
• N
• ⁢
• ∑
• i
• =
• 1
• N
• ⁢
• (
• v
• i
• -
• v
• _
• )
• 2
• v
• _
• according to the average wind speed v, and determining a Gaussian distribution
• f
• ⁡
• (
• v
• )
• =
• 1
• δ
• ⁢
• 2
• ⁢
• π
• ⁢
• e
• -
• (
• v
• -
• v
• _
• )
• 2
• 2
• ⁢
• δ
• 2
• ,
• with a center of v and a standard deviation of
• δ
• =
• 1
• N
• ⁢
• ∑
• i
• =
• 1
• N
• ⁢
• (
• v
• i
• -
• v
• _
• )
• 2
• ,
• of a wind speed distribution range corresponding to the turbulence intensity according to the turbulence intensity
• I
• =
• δ
• v
• _
• =
• 1
• N
• ⁢
• ∑
• i
• =
• 1
• N
• ⁢
• (
• v
• i
• -
• v
• _
• )
• 2
• v
• _
• ;
• and
• determining the wind speed distribution range (v−1.96δ, v+1.96δ) according to the theory of small probability event and the Gaussian distribution
• f
• ⁡
• (
• v
• )
• =
• 1
• δ
• ⁢
• 2
• ⁢
• π
• ⁢
• e
• -
• (
• v
• -
• v
• _
• )
• 2
• 2
• ⁢
• δ
• 2
• ,
• where turbulence intensity I corresponds to the average wind speed v, vi denotes an instantaneous wind speed of the i-th sampling point, and N denotes the number of sampling points in the preset period, and
• adjust a maximum rotating speed and a maximum torque of the wind wheel in the wind speed distribution range according to the thrust variation amplitude, wherein the maximum rotating speed and the maximum torque makes a fatigue load of the wind power generator set in the wind speed distribution range meet a preset standard;
• and
• run the wind power generator set according to the maximum rotating speed and the maximum torque of the wind wheel in the wind speed distribution range.