7641

7114

كارشناسي ارشد

قدرت

اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر

1391

دوازده،111ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

حسين ابوترابي زراچي، محمد ابراهيمي

26/1/92

مهندسي برق و كامپيوتر

ID7114

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Nonlinear MPPT Controller Design of PMSG in a Wind Energy Conversion System Amir Khazaee Amir khazaee@ymail com Date of Submission 2012 07 6 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor Hossein Abootorabi Zarchi hazarchi@gmail com Mohammad Ebrahimi mebrahim@cc iut ac ir Abstract Due to reduction of fossil fuels and environmental pollutions renewable energies are currently raising a great attention for obtaining electric power Wind energy is the most growing renewable resource in the world it is renewable infinite and environmentally clean Recently due to developments in power electronics variable speed wind turbines became more attractive because of its ability of operation at its maximum power coefficient which results in larger energy capture from the wind Permanent magnet synchronous generator PMSG is a popular generator in variable speed wind turbines The Energy captured from wind depends not only on wind conditions but it also depends on the ability of control system to track maximum power points Because of nonlinear inherent of electrical machines the excellent performance of their control system could be achieved by nonlinear control techniques In this paper some nonlinear control techniques adopted to be implemented on PMSG in wind turbines Firstly input output feedback linearization control scheme is introduced and implemented to track maximum power points The adaptive backstepping control system is then designed in presence of resistor uncertainty as well as mechanical torque disturbance which is the most concerned uncertainty in wind turbines It is a Lyapunov based nonlinear adaptive controller which is adopted in order to implement MPPT algorithm for permanent PMSG based wind turbines This approach is based on newly developed adaptive backstepping controller which gains a great attention in nonlinear control systems due to its capability to derive the control law and a stable Lyapunov function step by step Finally a class of PI sliding mode controller is proposed in order to implement MPPT The principles of sliding mode and linear PI controller are combined to ensure high performance operation The proposed method provides a robust fast and accurate speed tracking without penalty of high chattering which guarantees maximum power point tracking in a wind turbine At last simulation results in MATLAB SIMULINK verify the performance of proposed control techniques Keywords Adaptive backstepping control MPPT Permanent Magnet synchronous Generator Wind Turbine Input Output Feedback Linearization Adaptive Backstepping Pi Sliding 112 PDF created with pdfFactory trial version www pdffactory com

حسين ابوترابي زراچي، محمد ابراهيمي