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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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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


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UNDERLINES

  • Abstract

  • Introduction.

  • The system and its components

  • Results

  • Conclusions


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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.


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INTRODUCTION

  • Why WECS?

  • WECS Applications

  • The problems in WECS


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THE SYSTEM & ITS COMPONENTS

Sample study 600 kVA wind energy conversion scheme.


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THE SYSTEM & ITS COMPONENTS

Hybrid composite linear, nonlinear and motorized load model.


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THE SYSTEM & ITS COMPONENTS

The Matlab/Simulink functional model of full AC study system.


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THE SYSTEM & ITS COMPONENTS

tri-loop global voltage error tracking FL controlled scheme for voltage stabilization at generator, load and inverter buses.


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RESULTS

RMS value of the generator voltage with the controlled SPWM converter

RMS value of the generator voltage without SPWM converter


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RESULTS

RMS value of the generator current without SPWM converter.

RMS value of the generator current with the controlled SPWM converter


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RESULTS

RMS value of the load voltage without SPWM converter

RMS value of the load voltage with the controlled SPWM converter.


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RESULTS

Active power generated by the WECS with the controlled SPWM converter.

Active power generated by the WECS without SPWM converter


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RESULTS

Active power dissipated by the load with the controlled SPWM converter

Active power dissipated by the load without SPWM converter


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RESULTS

RMS current-voltage trajectory at generator terminals without

SPWM converter.

RMS current-voltage trajectory at generator terminals with SPWM converter


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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.


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Thank You for Your Attention


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APPENDICES


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APPENDIX


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APPENDIX


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APPENDIX


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APPENDIX


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APPENDIX


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