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Voltage and Energy Utilization Enhancement

MEPCON' 2008 12th International Middle-East Power Systems Conference Aswan, Egypt, march 12 -15, 2008. Voltage and Energy Utilization Enhancement. in a Stand-alone WECS Using a Fuzzy Logic. Controlled SPWM Converter Interface Scheme. İsmail H. Altaş & Emre Özkop. A. M. Sharaf.

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Voltage and Energy Utilization Enhancement

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  1. MEPCON' 2008 12th International Middle-East Power Systems Conference Aswan, Egypt, march 12 -15, 2008. Voltage and Energy Utilization Enhancement in a Stand-alone WECS Using a Fuzzy Logic Controlled SPWM Converter Interface Scheme İsmail H. Altaş & Emre Özkop A. M. Sharaf University of New Brunswick Karadeniz Technical University Fredericton, NB, Canada Trabzon - Turkey www.altas.org

  2. UNDERLINES • Abstract • Introduction. • The system and its components • Results • Conclusions

  3. ABSTRACT • A novel sinusoidal PWM switched AC/DC/AC converter interface scheme is presented. • A real novel tri-loop voltage error tracking fuzzy logic controller (FLC) is used to stabilize the stand alone Wind Energy Conversion Scheme (WECS) using an induction generator. • The proposed novel sinusoidal Pulse Width Modulator (SPWM) switched (AC/DC/AC) converter interface scheme serves as a combined voltage stabilization regulator and maximum wind energy utilization and enhancement compensator.

  4. INTRODUCTION • Why WECS? • WECS Applications • The problems in WECS

  5. THE SYSTEM & ITS COMPONENTS Sample study 600 kVA wind energy conversion scheme.

  6. THE SYSTEM & ITS COMPONENTS Hybrid composite linear, nonlinear and motorized load model.

  7. THE SYSTEM & ITS COMPONENTS The Matlab/Simulink functional model of full AC study system.

  8. THE SYSTEM & ITS COMPONENTS tri-loop global voltage error tracking FL controlled scheme for voltage stabilization at generator, load and inverter buses.

  9. RESULTS RMS value of the generator voltage with the controlled SPWM converter RMS value of the generator voltage without SPWM converter

  10. RESULTS RMS value of the generator current without SPWM converter. RMS value of the generator current with the controlled SPWM converter

  11. RESULTS RMS value of the load voltage without SPWM converter RMS value of the load voltage with the controlled SPWM converter.

  12. RESULTS Active power generated by the WECS with the controlled SPWM converter. Active power generated by the WECS without SPWM converter

  13. RESULTS Active power dissipated by the load with the controlled SPWM converter Active power dissipated by the load without SPWM converter

  14. RESULTS RMS current-voltage trajectory at generator terminals without SPWM converter. RMS current-voltage trajectory at generator terminals with SPWM converter

  15. CONCLUSIONS • The paper presents a novel low cost dynamic voltage error tri-loop fuzzy logic controller and sinusoidal PWM driven IGBT inverter scheme for stand alone wind energy system. • This PWM power converter scheme is extremely effective in ensuring voltage stabilization and enhancing power/energy utilization under severe load and wind prime mover/wind velocity excursion. • A tri-loop dynamic error driven Fuzzy Logic Controller is designed and employed in this application. • The use of tri-loop dynamic error signal to the controller ensures that all changes, excursions or variations in WECS, in Loads, and in DC interface system are included in the controller.

  16. Thank You for Your Attention

  17. APPENDICES

  18. APPENDIX

  19. APPENDIX

  20. APPENDIX

  21. APPENDIX

  22. APPENDIX

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