Digital Control in Power Electronics, 2nd Edition

Book description

This book presents the reader, whether an electrical engineering student in power electronics or a design engineer, a selection of power converter control problems and their basic digital solutions, based on the most widespread digital control techniques. The presentation is primarily focused on different applications of the same power converter topology, the half-bridge voltage source inverter, considered both in its single- and three-phase implementation. This is chosen as the test case because, besides being simple and well known, it allows the discussion of a significant spectrum of the most frequently encountered digital control applications in power electronics, from digital pulse width modulation (DPWM) and space vector modulation (SVM), to inverter output current and voltage control, ending with the relatively more complex VSI applications related to the so called smart-grid scenario. This book aims to serve two purposes: (1) to give a basic, introductory knowledge of the digital control techniques applied to power converters; and (2) to raise the interest for discrete time control theory, stimulating new developments in its application to switching power converters.

Table of contents

  1. Preface
  2. Acknowledgments
  3. Introduction (1/2)
  4. Introduction (2/2)
  5. The Test Bench: A Single-Phase Voltage Source Inverter
    1. The Voltage Source Inverter
      1. Fundamental Components
      2. Required Additional Electronics: Driving and Sensing
      3. Principle of Operation
      4. Dead-Times
    2. Low-Level Control of the Voltage Source Inverter: PWM Modulation
      1. Analog PWM: the Naturally Sampled Implementation
      2. Digital PWM: the Uniformly Sampled Implementation
      3. Single Update and Double Update PWM Modes
      4. Minimization of Modulator Delay: a Strong Motivation for Multi-Sampling
    3. Analog Control Approaches
      1. Linear Current Control: PI Solution (1/2)
      2. Linear Current Control: PI Solution (2/2)
      3. Nonlinear Current Control: Hysteresis Control
    4. References
  6. Digital Current Mode Control
    1. Requirements of the Digital Controller
      1. Signal Conditioning and Sampling
      2. Synchronization Between Sampling and PWM
      3. Quantization Noise and Arithmetic Noise
      4. Limit Cycle Oscillations
    2. Basic Digital Current Control Implementations
      1. The Proportional Integral Controller: Overview
      2. Simplified Dynamic Model of Delays
      3. The Proportional Integral Controller: Discretization Strategies
      4. Effects of the Computation Delay
      5. Derivation of a Discrete Time Domain Converter Dynamic Model
      6. Minimization of the Computation Delay
      7. The Predictive Controller (1/4)
      8. The Predictive Controller (2/4)
      9. The Predictive Controller (3/4)
      10. The Predictive Controller (4/4)
    3. References
  7. Multi-Sampled Current Controllers
    1. Oversampled PI Current Controller
      1. Small-Signal Frequency Response
    2. Oversampled Predictive Current Controller
      1. Closed-Loop Transfer Function Derivation
      2. Small-Signal Frequency Response
    3. Digital, Fixed Frequency Hysteresis Current Controller
      1. Switching Frequency Stabilization
      2. Controller Operation (1/2)
      3. Controller Operation (2/2)
      4. Small-Signal Frequency Response
    4. Large-Signal Response Test
    5. FPGA Chip Utilization
    6. Multi-Sampled Current Controllers: Conclusions
    7. References
  8. Extension to Three-Phase Inverters
    1. The Transformation
    2. Space Vector Modulation (1/2)
    3. Space Vector Modulation (2/2)
      1. Space Vector Modulation-Based Controllers
    4. The Rotating Reference Frame Current Controller
      1. Park's Transformation
      2. Design of a Rotating Reference Frame PI Current Controller
      3. A Different Implementation of the Rotating Reference Frame PI Current Controller (1/2)
      4. A Different Implementation of the Rotating Reference Frame PI Current Controller (2/2)
    5. References
  9. External Control Loops
    1. Modeling the Internal Current Loop
    2. Design of Voltage Controllers
      1. Possible Strategies: Large and Narrow Bandwidth Controllers
    3. Large Bandwidth Controllers
      1. PI Controller
      2. The Predictive Controller (1/2)
      3. The Predictive Controller (2/2)
    4. Narrow Bandwidth Controllers (1/2)
    5. Narrow Bandwidth Controllers (2/2)
      1. The DFT Filter-Based Voltage Controller
    6. Other Applications of the Current Controlled VSI
      1. The Controlled Rectifier
      2. The Active Power Filter
    7. References
  10. New digital control paradigms
    1. Flexibility vs. Performance
    2. Flexibility and Performance
    3. Distributed Generation Control Architectures
      1. VSIs in Distributed Generation Grids
      2. Control System Organization
      3. Control Architecture Implementation (1/2)
      4. Control Architecture Implementation (2/2)
    4. Controller Validation
      1. Simulink© Model
      2. Real-Time, Hardware-in-the-Loop Simulation
      3. Mitigation of Real-Time Simulation Artifacts
      4. Experimental Tests
    5. Closing Remarks
    6. References
  11. Authors' Biographies

Product information

  • Title: Digital Control in Power Electronics, 2nd Edition
  • Author(s): Simone Buso, Paolo Mattavelli
  • Release date: May 2015
  • Publisher(s): Morgan & Claypool Publishers
  • ISBN: 9781627057547