Development of Wind Turbine Pitch Angle Controller
AbdelRahman Marzouk Ahmed Elkattan;
Abstract
The world's need for energy that does not end, but is growing day after day. The renewable sources of energy come in the first priority of the world. Especially, wind energy is the best developing energy technology between the other renewable energies. Additionally, it has more benefits such as pollution free and clean. These factors made the wind energy production in continuously increasing.
So it became very important to generate more power from wind turbines while significantly reduce more loads. Thus, the control strategies are playing an important role to deal with the challenging characteristics of the wind turbines, these control models must be designed as robust as possible to do its role in different operating conditions and over a long period of time.
The main aim of our thesis is to design and simulate a pitch controller for reducing loads and maximizing the output power using FAST code developed by NREL, and Matlab/Simulink. But naturally, we should initially introduce aerodynamics and loads calculations of the horizontal axis wind turbine (HAWT).
Thesis presents two WT control models for two different machines (NREL 5 MW HAWT and NREL 1.5 MW HAWT). The control model of NREL 5 MW HAWT uses FAST to control and simulate the results of the two wind turbines operation regions (Region 2 for wind velocities below rated velocity and Region 3 for wind speeds above rated velocity). On the other side, the interfacing between FAST and MATLAB/Simulink is used to control of NREL 1.5 MW HAWT to control and simulate the results of the two wind turbine operation regions.
However, we can deduce from the simulation results of the two control models that in Region 2, which wind velocities are less than the rated value, blade pitch is kept at a certain value and generator torque control is applied to change the velocity of the turbine to sustain tip speed ratio (TSR) at certain value consistent to best power coefficient (Cp), therefore maximizing energy extracted. In Region 3 which wind velocities are greater than the rated value, generator torque is kept at rated torque, and blade pitch control is applied to control aerodynamic power to keep constant turbine velocity, in addition to decrease the moments on the wind turbine blades.
Keywords: Wind turbine, Control, Aerodynamics, Loads, Simulation, Power, Moments, Wind speed.
So it became very important to generate more power from wind turbines while significantly reduce more loads. Thus, the control strategies are playing an important role to deal with the challenging characteristics of the wind turbines, these control models must be designed as robust as possible to do its role in different operating conditions and over a long period of time.
The main aim of our thesis is to design and simulate a pitch controller for reducing loads and maximizing the output power using FAST code developed by NREL, and Matlab/Simulink. But naturally, we should initially introduce aerodynamics and loads calculations of the horizontal axis wind turbine (HAWT).
Thesis presents two WT control models for two different machines (NREL 5 MW HAWT and NREL 1.5 MW HAWT). The control model of NREL 5 MW HAWT uses FAST to control and simulate the results of the two wind turbines operation regions (Region 2 for wind velocities below rated velocity and Region 3 for wind speeds above rated velocity). On the other side, the interfacing between FAST and MATLAB/Simulink is used to control of NREL 1.5 MW HAWT to control and simulate the results of the two wind turbine operation regions.
However, we can deduce from the simulation results of the two control models that in Region 2, which wind velocities are less than the rated value, blade pitch is kept at a certain value and generator torque control is applied to change the velocity of the turbine to sustain tip speed ratio (TSR) at certain value consistent to best power coefficient (Cp), therefore maximizing energy extracted. In Region 3 which wind velocities are greater than the rated value, generator torque is kept at rated torque, and blade pitch control is applied to control aerodynamic power to keep constant turbine velocity, in addition to decrease the moments on the wind turbine blades.
Keywords: Wind turbine, Control, Aerodynamics, Loads, Simulation, Power, Moments, Wind speed.
Other data
| Title | Development of Wind Turbine Pitch Angle Controller | Other Titles | تطوير التحكم في التوربينة الهوائية | Authors | AbdelRahman Marzouk Ahmed Elkattan | Issue Date | 2015 |
Recommend this item
Similar Items from Core Recommender Database
Items in Ain Shams Scholar are protected by copyright, with all rights reserved, unless otherwise indicated.