US 10,240,585 B2Granted

Equivalent variable pitch differential control method and apparatus

AssigneeCsic Haizhuang Windpower Co., Ltd.

InventorsWei Yang, Youchuan Tao, Fen Tao, Jie Liu

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Abstract

An equivalent variable pitch differential control method and apparatus. The method includes: acquire a first control parameter and a second control parameter respectively by means of a static energy deviation PI control method; acquire an equivalent differential third control parameter using a dynamic energy deviation; and by taking a wind wheel measurement rotating speed and a wind wheel reference rotating speed as inputs, a proportion integration differentiation controller controls a wind generating set according to the first control parameter, the second control parameter, and the third control parameter, thereby making a wind wheel rotating speed follow the wind wheel reference rotating speed. A wind generating set is controlled in real time by combining first and second control parameters and an equivalent differential third control parameter to serve as parameter values of the proportion integration differentiation controller.

Claims10

Dependent claims

A method for differential control of variable pitch, comprising:

acquiring a first control parameter and a second control parameter respectively by means of a static energy deviation PI control method;
acquiring a differential third control parameter using a dynamic energy deviation;
and controlling, by a proportion integration differentiation (PID) controller, a wind turbine generator system according to the first control parameter, the second control parameter and the third control parameter by taking a wind wheel measurement rotating speed and a wind wheel reference rotating speed as inputs, so that the wind wheel measurement rotating speed follows the wind wheel reference rotating speed, wherein the first control parameter is acquired according to a formula:
K
P
=
2
⁢
I
drivetrain
⁢
Ω
ref
⁢
ζ
⁢
⁢
ω
G
gearbox
⁡
(
-
∂
P
∂
θ
)
wherein Ggearbox is a gearbox transmission ratio, Ωref is the wind wheel reference rotating speed, ω is frequency, ζ is a damping, Idrivetrain is a moment of inertia in a drive train of the wind turbine generator system, P is absorbed power by the wind wheel, and θ is the variable pitch angle;
the second control parameter is acquired according to a formula:
K
I
=
I
drivetrain
⁢
Ω
ref
⁢
ω
2
G
gearbox
⁡
(
-
∂
P
∂
θ
)
wherein Ggearbox is the gearbox transmission ratio, Ωref is the wind wheel reference rotating speed, ω is frequency, ζ is damping, Idrivetrain is the moment of inertia in drive train of the wind turbine generator system, P is the absorbed power by a wind wheel, and θ is the variable pitch angle;
and the third control parameter is acquired according to a formula:
K
d
=

I
drivetrain
⁡
(
Ω
-
Ω
ref
)
G
gearbox
⁡
(
∂
p
∂
β
)

wherein Ggearbox is the gearbox transmission ratio, Ω is the wind wheel measurement rotating speed, Ωref is the wind wheel reference rotating speed, ω is the frequency, and ζ is damping.

74 more elements

An apparatus for differential control of variable pitch, comprising:

a first acquisition unit configured to acquire a first control parameter and a second control parameter respectively by means of a static energy deviation PI control method;
a second acquisition unit configured to acquire a differential third control parameter using a dynamic energy deviation;
and a controlling unit configured to control, by a proportion integration differentiation (PID) controller, a wind turbine generator system according to the first control parameter, the second control parameter and the third control parameter by taking a wind wheel measurement rotating speed and a wind wheel reference rotating speed as inputs, so that the wind wheel measurement rotating speed follows the wind wheel reference rotating speed, wherein the first control parameter is acquired according to a formula:
K
P
=
2
⁢
I
drivetrain
⁢
Ω
ref
⁢
ζ
⁢
⁢
ω
G
gearbox
⁡
(
-
∂
P
∂
θ
)
wherein Ggearbox is a gearbox transmission ratio, Ωref is the wind wheel reference rotating speed, ω is frequency, ζ is a damping, Idrivetrain is a moment of inertia in a drive train of the wind turbine generator system, P is absorbed power by the wind wheel, and θ is the variable pitch angle;
the second control parameter is acquired according to a formula:
K
I
=
I
drivetrain
⁢
Ω
ref
⁢
ω
2
G
gearbox
⁡
(
-
∂
P
∂
θ
)
wherein Ggearbox is the gearbox transmission ratio, Ωref is the wind wheel reference rotating speed, ω is frequency, ζ is damping, Idrivetrain is the moment of inertia in drive train of the wind turbine generator system, P is the absorbed power by a wind wheel, and θ is the variable pitch angle;
and the third control parameter is acquired according to a formula:
K
d
=

I
drivetrain
⁡
(
Ω
-
Ω
ref
)
G
gearbox
⁡
(
∂
p
∂
β
)

wherein Ggearbox is the gearbox transmission ratio, Ω is the wind wheel measurement rotating speed, Ωref is the wind wheel reference rotating speed, ω is the frequency, and ζ is damping.

74 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/542,414Filed 25 Feb 2016
Priority: CN 2015 1 037508230 Jun 2015
Published: US 2018/0003155 A14 Jan 2018
Granted: 26 Mar 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

F03D 7/044
Characterised by the type of control logic: with PID control
F03D 7/02
Controlling wind motors: the wind motors having rotation axis substantially parallel to the air flow entering the rotor
F03D 7/0224
Adjusting aerodynamic properties of the blades: adjusting blade pitch
F03D 17/00
Monitoring or testing of wind motors