1st Edition

Multilevel Converters for Industrial Applications

    242 Pages 205 B/W Illustrations
    by CRC Press

    242 Pages 205 B/W Illustrations
    by CRC Press

    Modern semiconductor devices have reached high current and voltage levels, and their power-handling limits can be extended if they are used in multilevel converter configurations. To create high-performance and reliable control designs, however, engineers need in-depth understanding of the characteristics and operation of these topologies. Multilevel Converters for Industrial Applications presents a thorough and comprehensive analysis of multilevel converters with a common DC voltage source. The book offers a novel perspective to help readers understand the principles of the operation of voltage-source multilevel converters as power processors, and their capabilities and limitations.

    The book begins with an overview of medium-voltage power converters and their applications. It then analyzes the topological characteristics of the diode-clamped multilevel converter, the flying capacitor multilevel converter, and the asymmetric cascaded multilevel converter. For each topology, the authors highlight particular control issues and design trade-offs. They also develop relevant modulation and control strategies. Numerous graphical representations aid in the analysis of the topologies and are useful for beginning the analysis of new multilevel converter topologies.

    The last two chapters of the book explore two case studies that analyze the behavior of the cascade asymmetric multilevel converter as a distribution static compensator and shunt active power filter, and the behavior of the diode-clamped topology configured as a back-to-back converter. These case studies demonstrate how to address the associated control problems with advanced control and modulation schemes.

    Examining recent advances, this book provides deep insight on the design of high-power multilevel converters and their applications. It is a valuable reference for anyone interested in medium-voltage power conversion, which is increasingly being used in industry and in renewable energy and distributed generation systems to improve efficiency and operation flexibility.

    Introduction
    Introduction
    Medium-Voltage Power Converters
    Multilevel Converters
    Applications
    Aim of the Book
    References

    Multilevel Topologies

    Introduction
    Generalized Topology with a Common DC Bus
    Converters Derived from the Generalized Topology
    Symmetric Topologies without a Common DC Link
    Summary of Symmetric Topologies
    Asymmetric Topologies
    Summary
    References

    Diode-Clamped Multilevel Converter

    Introduction
    Converter Structure and Functional Description
    Modulation of Multilevel Converters
    Voltage Balance Control
    Effectiveness Boundary of Voltage Balancing in DCMC Converters
    Performance Results
    Summary
    References

    Flying Capacitor Multilevel Converter

    Introduction
    Flying Capacitor Topology
    Modulation Scheme for the FCMC
    Dynamic Voltage Balance of the FCMC
    Summary
    References

    Cascade Asymmetric Multilevel Converter

    Introduction
    General Characteristics of the CAMC
    CAMC Three-Phase Inverter
    Comparison of the Five-Level Topologies
    Summary
    References

    Case Study 1: DSTATCOM Built with a Cascade Asymmetric Multilevel Converter

    Introduction
    Compensation Principles
    CAMC Model
    Reactive Power and Harmonics Compensation
    Summary
    References

    Case Study 2: Medium-Voltage Motor Drive Built with DCMC

    Introduction
    Back-to-Back DCMC Converter
    Unified Predictive Controller of the Back-to-Back DCMC in an IM Drive Application
    Performance Evaluation
    Summary
    References

    Index

    Biography

    Sergio Alberto González, Ph.D., is a full professor of power electronics at the National University of La Plata (UNLP), Argentina. He is also an associate professor of power electronics and motors control at the National University of Quilmes (UNQ), Argentina (since 2000). Dr. González joined the Industrial Electronics, Control and Instrumentation Laboratory (LEICI), Argentina, in 1992. His research interests have been in the field of power converters, in particular DC-DC converters, resonant converters, and multilevel converters and their application in flexible AC transmission and power quality control.

    Santiago Andrés Verne, Ph.D., has been with the Industrial Electronics, Control and Instrumentation Laboratory (LEICI) at the National University of La Plata (UNLP) since 2003 studying multilevel converters and drives. He is also currently a head teaching assistant in the Electrical Engineering Department at UNLP.

    María Inés Valla, Ph.D., is a full professor in the Electrical Engineering Department at the National University of La Plata (UNLP). She is also a member of the National Research Council of Argentina (CONICET). Dr. Valla joined the Industrial Electronics, Control and Instrumentation Laboratory (LEICI) at UNLP in 1980, and since 1998 she has been the head of the power electronics group within LEICI. Her research interests are in the field of power electronics and AC drives. Dr. Valla has been an IEEE fellow since 2010 and a member of the Buenos Aires Academy of Engineering in Argentina since 2007.