Accurate Arm Currents Estimation for Dead-Time Compensation in Modular Multilevel Converters

IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG), pp. 1019–1023

Abstract

This paper proposes a method for estimating arm currents in modular multilevel converters, addressing critical dead-time effects in low-switching-frequency applications with small arm inductors. In this case, dead-time effects become significant and require compensation. Accurate estimation is essential, especially near zero-crossings, where precise compensation is required. Unlike previous studies the primarily focus on low-ripple conditions, this work introduces a comprehensive approach tailored for high-ripple conditions, enabling more effective dead-time compensation and improved performance of the system.

Authors 3

1. Kim Kyungwoo Aachen Institute of Power Generation and Storage Systems

   RWTH Aachen University

   Affiliation as printed

   Institute of Power Generation and Storage Systems, RWTH, Aachen University,Aachen,Germany

2. Zhan Ma

   Shandong University

   Affiliation as printed

   School of Electrical Engineering, Shandong University,Jinan,China

3. Rik W. De Doncker Aachen Institute of Power Generation and Storage Systems

   RWTH Aachen University

   Affiliation as printed

   Institute of Power Generation and Storage Systems, RWTH Aachen University,Research Campus Flexible Electrical Networks,Aachen,Germany