Abstract
The application of wind energy conversion systems for the production of electrical energy requires a cheap and reliable operation. The main goal of the study described in this report is to develop a pitch control law for a wind turbines. The wind turbine system under investigation has a three-bladed rotor which is connected to the generator by a transmission. The wind power plant is connected to a large utility grid. The power in the wind increases roughly as the cube of the wind speed. At a predetermined wind speed the power input to the wind turbine will have reached rated power, and the excess power in the wind must be discarded by the rotor to prevent the turbine overloading. The control design problem at full load is to limit the power output to rated power and to minimise fluctuations in produced electromechanical torque. The control system should realise this without excessive use of the input variable and must also be simple to implement. In order to be able to design a high performing control system, the system dynamics and the wind characteristics are studied. A model for simulation and control design purpose is presented. An adaptive pitch angle control system
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Citation Formats
Klingenberg, B.
Adaptive pitch control for wind turbines.
Denmark: N. p.,
1991.
Web.
Klingenberg, B.
Adaptive pitch control for wind turbines.
Denmark.
Klingenberg, B.
1991.
"Adaptive pitch control for wind turbines."
Denmark.
@misc{etde_10140697,
title = {Adaptive pitch control for wind turbines}
author = {Klingenberg, B}
abstractNote = {The application of wind energy conversion systems for the production of electrical energy requires a cheap and reliable operation. The main goal of the study described in this report is to develop a pitch control law for a wind turbines. The wind turbine system under investigation has a three-bladed rotor which is connected to the generator by a transmission. The wind power plant is connected to a large utility grid. The power in the wind increases roughly as the cube of the wind speed. At a predetermined wind speed the power input to the wind turbine will have reached rated power, and the excess power in the wind must be discarded by the rotor to prevent the turbine overloading. The control design problem at full load is to limit the power output to rated power and to minimise fluctuations in produced electromechanical torque. The control system should realise this without excessive use of the input variable and must also be simple to implement. In order to be able to design a high performing control system, the system dynamics and the wind characteristics are studied. A model for simulation and control design purpose is presented. An adaptive pitch angle control system is proposed. The adaptive control system is realised as a direct adaptive system. The control design problem is solved using linear optimal controllers based on the input-output approach. The stochastic pole placement controller is found to be the most suitable controller. Various estimations schemes were tested when solving the estimation problem - among others Pseudo Linear Regression and Recursive Maximum Likelihood estimation. None of the estimation schemes gave satisfactory results. (au) 19 refs.}
place = {Denmark}
year = {1991}
month = {Dec}
}
title = {Adaptive pitch control for wind turbines}
author = {Klingenberg, B}
abstractNote = {The application of wind energy conversion systems for the production of electrical energy requires a cheap and reliable operation. The main goal of the study described in this report is to develop a pitch control law for a wind turbines. The wind turbine system under investigation has a three-bladed rotor which is connected to the generator by a transmission. The wind power plant is connected to a large utility grid. The power in the wind increases roughly as the cube of the wind speed. At a predetermined wind speed the power input to the wind turbine will have reached rated power, and the excess power in the wind must be discarded by the rotor to prevent the turbine overloading. The control design problem at full load is to limit the power output to rated power and to minimise fluctuations in produced electromechanical torque. The control system should realise this without excessive use of the input variable and must also be simple to implement. In order to be able to design a high performing control system, the system dynamics and the wind characteristics are studied. A model for simulation and control design purpose is presented. An adaptive pitch angle control system is proposed. The adaptive control system is realised as a direct adaptive system. The control design problem is solved using linear optimal controllers based on the input-output approach. The stochastic pole placement controller is found to be the most suitable controller. Various estimations schemes were tested when solving the estimation problem - among others Pseudo Linear Regression and Recursive Maximum Likelihood estimation. None of the estimation schemes gave satisfactory results. (au) 19 refs.}
place = {Denmark}
year = {1991}
month = {Dec}
}