Dynamic modeling, control and adaptive envelope protection system for horizontal axiswind turbines

Download

index.pdf

Date

2018

Author

Şahin, Mustafa

Metadata

Show full item record

Item Usage Stats

363
views

240
downloads

In this thesis study, a wind turbine envelope protection system is introduced to protect turbines throughout the below and above rated regions. The proposed protection system, which is based on a neural network, adapts to various turbines and operational conditions. It can keep the turbine within pre-defined envelope limits whenever a safe operation is about to be violated. The avoidance is realized by control limiting technique applied to the blade pitch controller output, thereby adjusting the blade pitch angle. To achieve the purpose, a horizontal axis wind turbine (HAWT) dynamic (simulation) model based on Blade Element Momentum (BEM) theory is developed using MATLAB and Simulink programs. It is named as MS (Mustafa Sahin) Bladed simulation model. The MS Bladed model includes important aerodynamic corrections and particular coordinate systems etc. for a more realistic turbine behavior. It is validated using experimental data or program/model performance predictions of various turbines belong to National Renewable Energy Laboratory, or NREL. Eventually, NREL 5 MW wind turbine is adopted in the MS Bladed model. Baseline controllers such as generator torque and collective blade pitch controllers are designed for NREL 5MW turbine, and then their simulations are evaluated. Afterward, the proposed protection system is designed and added on to the controlled MS Bladed model for NREL 5 MW turbine. Thrust force is selected as the pre-defined envelope limit. Simulations under normal turbulent winds with different mean values have shown that the newly proposed system shows a promising capability to keep the 5 MW turbine within the pre-defined thrust limit throughout the below and above rated regions. In this thesis study, three example cases under normal turbulent winds with mean values of 8, 11 and 15 m/s are given to show the effectivity of the proposed algorithm.

Subject Keywords

Wind turbines., Wind turbines, Wind turbines

URI

http://etd.lib.metu.edu.tr/upload/12622891/index.pdf
https://hdl.handle.net/11511/27865

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Modeling and investigation of fault ride through capability of variable speed wind turbines Koç, Erkan; Güven, Ali Nezih; Department of Electrical and Electronics Engineering (2010) Technological improvements on wind energy systems with governmental supports have increased the penetration level of wind power into the grid in recent years. The high level of penetration forces the wind turbines stay connected to the grid during the disturbances in order to enhance system stability. Moreover, power system operators must revise their grid codes in parallel with these developments. This work is devoted to the modeling of variable speed wind turbines and the investigation of fault ride troug...
Hybrid excited synchronous generator design and comparison of direct drive wind turbines Akgemci, Aysel; Keysan, Ozan; Department of Electrical and Electronics Engineering (2019) Various types of electrical generators are used in wind turbines and there is not an agreement on the best generator type. Although, high speed Doubly Fed Induction Generators (DFIGs) are still the most common generator topology utilized in wind turbine systems, there is a trends toward direct-drive Permanent Magnet Synchronous Generators (PMSGs), as they are more efficient and reliable. However, permanent magnets (PMs) induce uncontrollable voltage due to the fixed flux resulting from PM excitation. Conven...
Dynamic modelling and simulation of a wind turbine Altuğ, Ayşe Hazal; Yavrucuk, İlkay; Department of Aerospace Engineering (2015) In this thesis, a dynamic model for a horizontal axis wind turbine is developed for an upwind configuration using the MATLAB/Simulink environment. Blade Element Momentum Theory is used to model the rotor. It is assumed that the rotor blades are rigid and wind speed is uniform. Aerodynamic and gravitational forces are calculated as distributed loads. Verification of the model is done by using the LMS Samtech, Samcef for Wind Turbines software. Aerodynamic properties of the blades, sectional loads and moments...
Comparative study of transient and quasi-steady aeroelastic analysis of composite wind turbine blade in steady wind conditions Sargın, Hakan; Kayran, Altan; Department of Aerospace Engineering (2014) The objective of this study is to conduct a comparative study of the transient and quasi-steady aeroelastic analysis of a composite wind turbine blade in steady wind conditions. Transient analysis of the wind turbine blade is performed by the multi-body dynamic code Samcef Wind Turbine which uses blade element momentum theory for aerodynamic load calculation. For this purpose, a multi-body wind turbine model is generated with rigid components except for the turbine blades. For the purposes of the study, a r...
Design and analysis of test rig for small scale wind turbine blade İçen, Mustafa.; Çöker, Demirkan; Department of Aerospace Engineering (2019) In this thesis, a test setup for the experimental 5 meter RÜZGEM wind turbine blade and that can be used for small scale wind turbine blades up to 9 meter is designed and analyzed. The purpose of this thesis is to help establishing the test infrastructure under METUWIND project such as NREL, RISØ, CRES. The literature on the existing facilities is reviewed. After that, RÜZGEM wind turbine blade is introduced and design loads are presented. To apply these loads appropriately to the blade, the moment distribu...

Citation Formats

M. Şahin, “Dynamic modeling, control and adaptive envelope protection system for horizontal axiswind turbines,” Ph.D. - Doctoral Program, Middle East Technical University, 2018.