Multi-Level Converters for Medium Voltage Applications

This book presents a detailed comparison of state-of- the-art 2L-VSC, 3L-NPC VSC, and different ML VSCs for MV converters. On the basis of the application requirements, different ML converter structures are designed, simulated, and evaluated. The development of design tools based on state-of-the-art converters and semiconductors, which enable the dimensioning of power semiconductors, dc link capacitors, and transformers; are one major part of this book. Finally, the amount of active and passive components, the modulation, losses, and efficiency are calculated and compared. The book is arranged in seven main chapters: The introduction in chapter 1 is followed by an overview of MV converter topologies in chapter 2. Chapter 3 presents the basic structure and function of VSC topologies. The dimensioning and design of power semiconductors, dc link capacitors, and isolation transformers are developed in chapter 4. The basic converter data for comparison are described in chapter 5. The complete comparison of the different converter topologies is performed in chapter 6. Finally, the conclusion and discussion are presented in chapter 7.