book

Multilevel Converters for Industrial Applications

by Sergio Alberto Gonzalez, Santiago Andres Verne, Maria Ines Valla

July 2017

Intermediate to advanced

241 pages

5h 35m

English

CRC Press

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Cover
Half Title
Title Page
Copyright Page
Table of Contents
Preface
About the Authors
Chapter 1 Introduction
1.1 Introduction1.2 Medium-Voltage Power Converters1.3 Multilevel Converters1.3.1 Symmetric Topologies1.3.2 Asymmetric Topologies1.4 Applications1.4.1 Power Quality Improvement1.4.2 Renewable Energy Interconnection1.4.3 Variable Speed Drives1.5 Aim of the BookReferences
Chapter 2 Multilevel Topologies
2.1 Introduction2.2 Generalized Topology with a Common DC Bus2.2.1 Basic Cell2.2.2 Generalized Topology Characteristics2.2.3 Three-Level Generalized Topology2.3 Converters Derived from the Generalized Topology2.3.1 Diode-Clamped Topology2.3.1.1 NPC Converter Topology2.3.1.2 Four-Level Diode-Clamped Topology2.3.1.3 Five-Level Diode-Clamped Topology2.3.1.4 n-Level DCMC Topologies2.3.2 Flying Capacitor Topology2.3.2.1 Voltage on the Flying Capacitor2.3.2.2 Four-Level Flying Capacitor Topology2.3.2.3 Five-Level FCMC2.4 Symmetric Topologies without a Common DC Link2.4.1 Five-Level CCMC2.5 Summary of Symmetric Topologies2.6 Asymmetric Topologies2.6.1 Hybrid Asymmetric Topologies2.6.1.1 CCMC with Different Values of Voltage Sources2.6.2 Combining Different Topologies2.6.3 Cascade Asymmetric Multilevel Converter2.7 SummaryReferences
Chapter 3 Diode-Clamped Multilevel Converter
3.1 Introduction3.2 Converter Structure and Functional Description3.2.1 Voltage Clamping3.2.2 Switching Logic3.3 Modulation of Multilevel Converters3.3.1 Multilevel Space Vector Modulation3.3.1.1 Hexagonal Coordinate System3.3.1.2 Nearest Three Vectors Identification3.3.1.3 Duty Cycle Calculation3.4 Voltage Balance Control3.4.1 Capacitor Voltage Calculation3.4.2 Voltage Balance Optimization3.4.3 Flow Diagram3.5 Effectiveness Boundary of Voltage Balancing in DCMC Converters3.6 Performance Results3.7 SummaryReferences

Chapter 4 Flying Capacitor Multilevel Converter
4.1 Introduction4.2 Flying Capacitor Topology4.2.1 Charge Balance on the Flying Capacitors4.3 Modulation Scheme for the FCMC4.3.1 Phase-Shifted Carrier Pulse Width Modulation4.3.1.1 Charge Balance Using PSPWM4.4 Dynamic Voltage Balance of the FCMC4.4.1 Dynamic Model4.4.2 Tuned Balancing Network4.4.2.1 Root Locus Analysis4.5 SummaryReferences
Chapter 5 Cascade Asymmetric Multilevel Converter
5.1 Introduction5.2 General Characteristics of the CAMC5.2.1 Modulation Strategy5.2.2 Averaged Voltage5.3 CAMC Three-Phase Inverter5.3.1 Averaged Currents in the DC Bus5.3.1.1 iDC Current5.3.1.2 Common Mode and Differential Mode Currents5.3.2 Common Mode Current5.3.3 Differential Mode Harmonic Currents5.4 Comparison of the Five-Level Topologies5.4.1 DCMC5.4.2 FCMC5.4.3 CCMC5.4.4 CAMC5.5 SummaryReferences
Chapter 6 Case Study 1: DSTATCOM Built with a Cascade Asymmetric Multilevel Converter
6.1 Introduction6.2 Compensation Principles6.3 CAMC Model6.3.1 Current Control6.4 Reactive Power and Harmonics Compensation6.4.1 System Model6.4.2 Reactive Power Compensation6.4.3 Harmonics Current Compensation6.5 SummaryReferences
Chapter 7 Case Study 2: Medium-Voltage Motor Drive Built with DCMC
7.1 Introduction7.2 Back-to-Back DCMC Converter7.3 Unified Predictive Controller of the Back-to-Back DCMC in an IM Drive Application7.3.1 Control of the Back-to-Back DCMC Converter7.3.2 Load Converter: Predictive Torque Control7.3.3 Line Converter: Predictive Power Control7.3.3.1 Current and Power Calculations7.3.3.2 Dynamic Active Power Reference Design7.3.4 Switching Transition Constraint7.4 Performance Evaluation7.4.1 Mechanical Load Variation7.4.2 Voltage Sag7.4.3 Energy Recovery7.4.4 Effectiveness of the DC Bus Balancing Algorithm7.5 SummaryReferences
Index

Overview

This book offers a novel, comprehensive analysis of voltage-source multilevel converters and their applications. Focusing on converters with a common DC voltage source, the authors examine two case studies that include both symmetrical and asymmetrical topologies. The text provides a simple and immediate understanding of the principles of operation of voltage-source DC/AC multilevel converters and includes graphical representation of the states of power switches of universal multilevel converters. This enables readers to understand traditional topologies and also offers a powerful tool for the analysis of new topologies.

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