Comparison of Two and Three-Level DC-AC Converters for a 100 kW Battery Energy Storage System

Comparison of Two and Three-Level DC-AC Converters for a 100 kW Battery Energy Storage System

Stecca, M. (TU Delft DC systems, Energy conversion & Storage)
Soeiro, Thiago B. (TU Delft DC systems, Energy conversion & Storage)
Ramirez Elizondo, L.M. (TU Delft DC systems, Energy conversion & Storage)
Bauer, P. (TU Delft DC systems, Energy conversion & Storage)
Palensky, P. (TU Delft Intelligent Electrical Power Grids)

2020

This paper discusses a qualitative comparison between Two and Three-Level Voltage Source Converter (VSC) topologies for battery energy storage applications. Three-Level Neutral Point Clamped (NPC) and T-Type circuit topologies are benchmarked versus the state-of-art Two-Level VSC in terms of efficiency and power density considering a 100 kW system. Analytical equations for determining the power losses in the semiconductor modules are given, and the procedure for designing the output LCL filter and the DC-link capacitors is described. The analysis, based on off-the-shelf circuit components, shows that the Three-Level topologies perform better than the Two-Level one in both considered metrics, mainly due to their lower switching losses that allow operating at higher switching frequency without significantly degrading the system efficiency, and, at the same time, increasing the system power density. Additionally, it is found that the T-Type topology shows better performances than the NPC topology at full and high partial loads, being then more suitable for applications that require most of the operation at maximum power.

Battery energy storage systems
Neutral Point Clamped
T-Type
Voltage Source Converter

http://resolver.tudelft.nl/uuid:1f4373e7-fad7-4570-b872-32a36c3fc980

https://doi.org/10.1109/ISIE45063.2020.9152545

IEEE, Piscataway

2021-12-22

978-1-7281-5636-1

2020 IEEE 29th International Symposium on Industrial Electronics (ISIE): Proceedings

29th IEEE International Symposium on Industrial Electronics, 2020-06-17 → 2020-06-19, Delft, Netherlands

Virtual/online event due to COVID-19 Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

conference paper

© 2020 M. Stecca, Thiago B. Soeiro, L.M. Ramirez Elizondo, P. Bauer, P. Palensky