Wind power variable pitch speed measuring generator

What is a variable pitch wind turbine control system?

The herein-developed controllers are devoted for variable speed, variable pitch wind turbine control for high wind speeds. The main objective of the control system in this area is to reduce electrical power and rotor speed fluctuations while reducing the control loads.

How to control a variable speed wind turbine?

A new control strategy for a variable speed, variable pitch wind turbine is proposed in this paper for the above-rated power operating condition. This multivariable control strategy is realized by combining a nonlinear dynamic state feedback torque control strategy with a linear control strategy for blade pitch angle.

What is pitch control in a wind turbine?

Pitch control is relatively fast, however, and can be better used to regulate power flow especially when near the high speed limit. Figure 1 shows the system under consideration. The wind turbine is connected to a variable-speed wind turbine. The generator output can be controlled to follow the commanded power.

What is the pitch angle of a wind turbine?

As expected for this wind speed range, the pitch angle is passive, being kept constant to its optimal value (i.e. zero for the considered wind turbine). The active power delivered to the grid does reflect the variation in the wind speed. Notice that the fast oscillations in the wind speed are completely filtered out from the electrical power.

How do you calculate a variable speed wind turbine?

A variable-speed wind turbine generally consists of an aeroturbine, a gearbox, and a generator. The aerodynamic power captured by the rotor is given by the nonlinear expression (1) P a = 1 2 ρ π R 2 C p ( λ, β) ν 3, where ωr is the rotor speed; R the rotor radius and ρ the air density.

What is the maximum pitching rate of a wind turbine?

In the simulation, the maximum pitching rate is set as 10° per second [ 21, 29 ]. If a wind turbine with a lower pitching rate is used, the generator speed may increase faster and reach a higher value during the wind speed sudden increase or load power sudden decrease where the pitch control is engaged.