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Master of Science Thesis in Electric Power Engineering - page 8 / 114

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TABLE OF CONTENTS

ABSTRACT

ACKNOWLEDGEMENTS

LIST OF SYMBOLS, SUPERSCRIPTS, SUBSCRIPTS AND ABBREVIATIONS

1 INTRODUCTION AND SCOPE

2 THREE PHASE CONTROLLED RECTIFIERS

    • 2.1

      Introduction

    • 2.2

      Universal bridge topology

      • 2.2.1

        Steady state operation

      • 2.2.2

        Mathematical model

      • 2.2.3

        Limitations

    • 2.3

      Control strategies

      • 2.3.1

        Introduction

      • 2.3.2

        Direct Power Control and Virtual Flux Direct Power Control

      • 2.3.3

        Voltage and Virtual Flux Oriented Control

      • 2.3.4

        Comparison and discussion

    • 2.4

      Pulse Width Modulation

      • 2.4.1

        Sinusoidal PWM

      • 2.4.2

        Digital implementation

      • 2.4.3

        Dead time effect

3 VOLTAGE ORIENTED CONTROL – SIMULATION

    • 3.1

      Introduction – References chosen

    • 3.2

      System block diagram

    • 3.3

      PWM Simulation

      • 3.3.1

        Simulink implementation of PWM

    • 3.4

      Current controller

      • 3.4.1

        Internal Model Control

      • 3.4.2

        Synchronous PI control

      • 3.4.3

        Design of the synchronous PI controller

      • 3.4.4

        Active damping, voltage saturation, anti windup

      • 3.4.5

        Current controller simulation

    • 3.5

      DC link voltage controller

      • 3.5.1

        DC link model and linearization

      • 3.5.2

        Design of voltage controller

      • 3.5.3

        Voltage saturation, anti windup, active damping

      • 3.5.4

        Voltage controller simulation

      • 3.5.5

        Simulation with current controller

      • 3.5.6

        Controller improvements

    • 3.6

      Stability analysis

viii

IV

V

VI

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3

3 5 5 5 9 11 11 12 13 14 15 15 16 16

18

18 19 20 20 22 22 22 23 25 27 30 30 30 31 33 36 39 41

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