Number of Levels, Arm Inductance and Modulation Trade-offs for High Power Medium Voltage Grid-Connected Modular Multilevel Converters

Number of Levels, Arm Inductance and Modulation Trade-offs for High Power Medium Voltage Grid-Connected Modular Multilevel Converters

Shekhar, A. (TU Delft DC systems, Energy conversion & Storage)
Beloqui Larumbe, L. (TU Delft DC systems, Energy conversion & Storage)
Soeiro, Thiago B. (TU Delft DC systems, Energy conversion & Storage)
Wu, Y. (TU Delft DC systems, Energy conversion & Storage)
Bauer, P. (TU Delft DC systems, Energy conversion & Storage)

2019

There is an increasing focus on integrating flexible dc links for bulk power routing in medium voltage distribution grids. In such applications, the ac-dc Modular Multilevel Converter (MMC) devised for medium voltage and high-power ratings can be an interesting choice. This paper highlights some less explored design trade-offs arising due to the limitation on N in relation to modulation frequency and arm inductance. Specifically, the study intends to describe the interdependent influence of each degree of freedom on several aspects such as capacitor voltage balancing, circulating currents and harmonic performance. Finally, the importance of considering interhar-monies in the performance assessment of the MMC instead of the conventional interpretation of distortion calculation is highlighted.

Capacitor voltage balancing
Circulating current
Design steps
Grid-connected
Harmonic performance
Optimal submodules

http://resolver.tudelft.nl/uuid:cdaa5062-9a7b-4580-959f-10539560efcf

IEEE

978-1-7281-1612-9

2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia)

10th International Conference on Power Electronics - ECCE Asia, ICPE 2019 - ECCE Asia, 2019-05-27 → 2019-05-30, Busan, Korea, Republic of

Institutional Repository

conference paper

© 2019 A. Shekhar, L. Beloqui Larumbe, Thiago B. Soeiro, Y. Wu, P. Bauer