Front Cover

Modeling and Control of Power Electronics Converter System for Power Quality Improvements

Copyright Page

Contents

List of Contributors

Biography

1. Power Quality: An Introduction

1.1 Introduction

1.2 Power Quality Phenomena

1.3 Types of Power Quality Disturbances

1.3.1 Frequency events

1.3.2 Voltage events

1.3.3 Waveform events

1.3.3.1 Steady-state distortions

1.3.3.2 Transient distortions

1.3.4 Harmonic distortion

1.4 Causes and Effects of Power Quality Problems

1.4.1 Causes and effects of harmonics and reactive power

1.5 Power Quality Standards

1.5.1 IEEE power quality standards

1.5.2 IEEE standard 519-2014—recommended harmonic limits

1.5.3 Important terms

1.5.3.1 Point of common coupling

1.5.3.2 Isc/IL ratio

1.5.3.3 TDD and THD

1.5.4 IEC power quality standards

1.5.5 IEC standards for voltage and current compatibility levels

1.5.5.1 IEC 61000-2-2

1.5.5.2 IEC 61000-3-2:2014

1.5.5.3 IEC 61000-3-4

1.5.6 EN 61000-3-2 classifications and limits

1.5.7 Energy efficiency and power quality standards applicable for variable frequency drive

1.5.8 Harmonic line current reduction techniques

1.6 Conclusion

References

Further Reading

2. Control Strategies of Shunt Active Power Filter

2.1 Introduction

2.1.1 Causes and effects of harmonics and reactive power

2.1.2 Classical solutions

2.1.3 Active solutions

2.2 Topologies of Active Power Filters

2.2.1 Converter-based classification

2.2.2 Topology-based classification

2.2.3 Supply system-based classification

2.2.4 Installation of active power filter

2.3 Shunt Active Power Filter

2.3.1 Basic compensation principle

2.3.2 Power flow for ideal compensation

2.3.3 Power circuit topologies

2.3.4 Control strategies

2.3.4.1 Signal conditioning

2.3.4.2 Estimation of compensating signals

2.3.4.3 Generation of switching signals

2.3.4.3.1 Direct and indirect current control

2.3.4.4 Time domain control

2.3.4.4.1 Filter-based methods (Green et al.)

2.3.4.4.2 Instantaneous reactive power theory (p-q theory)

2.3.4.4.3 Modified instantaneous reactive power theory

2.3.4.4.4 Synchronous reference frame theory

2.3.4.4.5 Regulating the DC-link voltage

2.3.4.4.5.1 Estimation of reference source current

2.3.4.4.5.2 Current supplied by the source is determined from Eq. (2.12)

2.3.4.4.5.3 Role of DC-link capacitor

2.3.5 Frequency domain control

2.3.5.1 Mathematical expressions

2.4 Conclusion

References

Further Reading

3. Conventional Multilevel Inverter: Topologies and Control Strategies

3.1 Introduction

3.2 Conventional Multilevel Inverter Topologies

3.2.1 Diode-clamped multilevel inverter

3.2.2 Capacitor-clamped or flying capacitor multilevel inverter

3.2.3 Cascaded H-bridge multilevel/multicell inverter

3.2.4 Comparison of different conventional multilevel inverter topologies

3.3 Multilevel Inverter Modulation Techniques

3.3.1 Classification of multilevel inverter modulation techniques

3.3.2 Multilevel sinusoidal pulse-width-modulation techniques

3.3.2.1 Based on carrier signals

3.3.2.2 Based on modulating signals

3.3.2.2.1 Control pulse generation in switching frequency optimal SPWM technique

3.3.3 Space vector PWM (SVPWM) technique

3.3.3.1 Modeling of three-level SVPWM

3.4 Conclusion

References

4. Control of Multilevel Inverters With Reduced Device Count

4.1 Introduction

4.2 Control of RDC-MLIs

4.3 Universal Control Scheme

4.4 Implementation of Universal Control Scheme (UCS) for a Five-Level Inverter Based on CCS-MLI

4.4.1 Simulation model for obtaining multilevel reference signal “sML(t)”

4.4.2 Simulation model for obtaining actual driving pulses for a CCS-MLI-based five-level inverter

4.4.3 Simulation of a five-level CCS-MLI

4.4.4 Experimental implementation of five-level CCS-MLI

4.4.5 Using UCS for state-selection for desired control objectives

4.5 Conclusion

References

5. Active Waveshaping Techniques for Power-Quality Improvements in AC Drives

5.1 General

5.2 Classification of Active Waveshaping Techniques

5.2.1 Single-switch boost power-factor-controller converter

5.2.2 Symmetrical two-switch boost power-factor-controller converter

5.2.3 Asymmetrical two-switch boost power-factor-controller converter

5.2.4 Voltage-source converter

5.3 Design and Modeling of Active Waveshaping Converters

5.3.1 Design and modeling of single-switch boost power-factor-controller converter

5.3.2 Design and modeling of two-switch boost power-factor-controller converter

5.3.3 Design and modeling of asymmetrical two-switch boost power-factor-controller converter

5.3.4 Design and modeling of voltage-source converter

5.4 Matlab-Based Model of Single-Phase Improved Power-Quality Converters for Feeding VC-PMSM Drive

5.5 Hardware Implementation of Single-Phase Improved Power-Quality Converters for Feeding PMSM Drive

5.5.1 Development of power circuit for improved power-quality ac–dc converters

5.5.2 Development of control circuit for improved power-quality ac–dc converters

5.6 DSP-Based Software Implementation of Two-Switch ac–dc Converter

5.6.1 Reference dc-link voltage input

5.6.2 Sensing of ac mains and dc-link voltage signal

5.6.3 Voltage controller

5.6.4 Reference inductor current generation

5.6.5 Switching signal generation for two-switch boost ac–dc converter

5.7 Testing of Two-Switch ac–dc Converter

5.7.1 Testing of control circuit

5.7.2 Testing of power circuit

5.8 Results and Discussion

5.8.1 Starting response of PMSM drive with ac–dc converters

5.8.2 Steady-state performance

5.8.3 Power-quality improvements

5.9 Conclusion

References

Gains of PI Voltage Controller

6. Isolated Active Waveshaping Techniques for Power Quality Improvements in Variable Frequency AC Drive

6.1 General

6.2 Classification of Isolated Active Waveshaping Techniques in AC-DC Converter Feeding VC-Based PMSM Drive

6.3 Design of Isolated Active Waveshaping Converters in DCM of Operation

6.3.1 Design AC-DC cuk converter

6.3.2 Design of AC-DC SEPIC Converter

6.3.3 Design of AC-DC Flyback converter

6.3.4 Design of AC-DC Zeta converter

6.4 PSIM-Based Simulation of High Frequency Transformer Isolated AC-DC Converters for Feeding PMSM Drive

6.5 DSP-Based Hardware Implementation of Isolated AC-DC Converters for Feeding PMSM drive

6.5.1 Development of signal conditioning circuits

6.5.2 Development of power circuit of the converter

6.6 DSP-Based Software Implementation of High Frequency Transformer Isolated AC-DC Converters

6.6.1 Reference DC-link voltage input

6.6.2 Filtering of sensed DC-link voltage

6.6.3 Proportional-integral voltage controller

6.6.4 Switching signal generation for isolated AC-DC converters

6.7 Testing of High Frequency Transformer Isolated AC-DC Converters

6.7.1 Testing of power circuit

6.7.2 Testing of control circuit

6.8 Results and Discussion

6.8.1 Starting performance

6.8.2 Steady-state performance

6.8.3 Load perturbation performance of the converters

6.8.4 Power quality improvements

6.8.5 Comparison of high frequency transformer isolated AC-DC converter topologies

6.9 Conclusions

References

APPENDIX-I: Design Equations of High Frequency Isolated AC-DC Converters

APPENDIX-II: Design Parameters of High Frequency Isolated AC-DC Converters

Glossary

Index

Back Cover