Dissertation > Excellent graduate degree dissertation topics show

Megawatt Level Wind Turbine Fuzzy Control

Author: WenHeZuo
Tutor: YaoXingJia
School: Shenyang University of Technology
Course: Motor and electrical
Keywords: wind turbine variable speed constant frequency pitch control adaptive fuzzy control fuzzy controller
CLC: TM315
Type: Master's thesis
Year: 2008
Downloads: 318
Quote: 4
Read: Download Dissertation

Abstract


Wind turbine is a comprehensive system engineering of high technology which deals with aerodynamics, automatic control, mechanical drive and generator etc. The research difficulties and hot pots of wind power are focused on high power capacity, advanced control and optimization etc. Control is crucial to the efficiency and reliability of wind turbines. Wind energy has lower density, instability and randomness, wind turbines have strong nonlinear multivariable with many uncertain factors and disturbances. The thesis expands its investigation on relevant control problems of wind turbines, main contents can be concluded the following:(1) The mathematical model of large-scale wind turbine is established by the method of analysis modeling to reveal the dynamic behavior of complete wind turbine. The model can reflect the basic dynamics and is suitable for control purpose. It also can be used for the validity of control strategy.(2) A new method for estimating the optimal rotating speed at low wind speed is proposed by an application of fuzzy inference system. The method can realize maximum wind energy capture and avoids the inaccuracy by measuring the wind speed. It need not know the aerodynamic characteristics of wind turbine.(3) Adaptive optimal fuzzy system for speed control is proposed based on the motion equation of wind turbine and generator. This algorithm synthesizes the mechanical and electrical characteristics. System identification is part of the controller. An improved nearest-neighbor clustering learning algorithm is proposed for adaptive optimal fuzzy system on the basis of principle introduction. It considers input and output data to determine cluster and adapts the decay factor according to cluster sample amounts. The improved algorithm overcomes the shortcomings of many sensitive parameters and difficult adjustment of parameters.(4) In view of the control request at high wind speed for variable speed constant frequency wind turbine, has designed the fuzzy controller. This controller adjust the pitch angle according to the change of wind speed to limit the energy which the rotor catches and keep rated output power. The simulation result express that the pitch controller has good abilities of real time and robustness.

Related Dissertations

  1. Grid-Side Converter Control and Wind Turbine Emulator in Direct Drive Wind Power System,TM46
  2. Research on Control Algorithm of Ball&Plate System,TP13
  3. Research on Control of Direct Driving Type WTG Grid Converter Based on DSP,TM46
  4. Based on Blind separation of large wind turbine mechanical fault signal feature extraction,TK83
  5. Wind power wind simulation system development,TM614
  6. Large wind turbine pitch control independent technology research,TM315
  7. Research on Control Algorithm of PT Visual Turntable with Servo System,TP273.4
  8. Study on Simulation of Brushless Double-fed Wind Generator Control System,TM315
  9. The Control Technology of the Rotor-side Converter of the Double-fed VSCF Wind Turbine,TM461
  10. Research on Attitude Determination and Control of Small Satellite Based on Nonlinear Filter,V448.2
  11. The Rearch on Motor Drives Control System of Workover Crane,TE935
  12. Research and Design of the Intelligent Lead-Acid Battery Charger,TM910.6
  13. Research on Voltage Stabilised Dc Converter of Permanent Magnet Direct Drive Power Generation,TM46
  14. Research on Control Strategy of STATCOM for Voltage Fluctuation in Wind Energy Conversion Systems,TM464
  15. Research on Direct Power Control Technology of Variable Speed Constant Frequency Doubly-Fed Wind Power Generation,TM461
  16. Research on the Control Strategy of VSCF Wind Turbine,TM315
  17. Control of Converters for Megawatt Level DFIG,TM614
  18. Numerical Analysis of Wind Turbine Aerodynamic Performance,TM315
  19. Research on Maximum Power Capture Technology for Horizontal Axis Tidal Current Turbine,TV734.1
  20. Strength Analysis of Fluid Solid Interaction Field of MW Grade Wind Turbine Blades,TM315
  21. Dynamic Coupling Analysis and Optimum Technology on Monopile Tripod Support Structures of Offshore Wind Turbine,P75

CLC: > Industrial Technology > Electrotechnical > Motor > Generators, large the generator group ( Zonglun,) > Wind turbines
© 2012 www.DissertationTopic.Net  Mobile