Modelling and Design of a Droop-Based Cascaded Controller for LLC Resonant Converter

Yang X, Pohlenz S, Schwanninger R, Schleippmann N, Wunder B, März M (2023)

Publication Type: Conference contribution

Publication year: 2023

Publisher: IEEE

Conference Proceedings Title: 2023 IEEE Fifth International Conference on DC Microgrids

Event location: Auckland NZ

DOI: 10.1109/ICDCM54452.2023.10433615

Abstract

This paper proposes a digital cascaded control strategy for integrating an LLC resonant converter into a DC Microgrid. The designed control scheme is particularly suitable for battery storage applications in discharging mode. The outer loop of the cascaded controller is a droop controller which provides the reference current according to the DC grid voltage. The inner loop regulates the current according to the reference by pulse frequency modulation (PFM). A seventh-order state-space model based on first harmonic approximation (FHA) and extended describing function (EDF) was built to assist the controller design. The proposed control scheme is validated for both buck and boost operation mode in the PLECS simulation environment.

Authors with CRIS profile

Raffael Schwanninger Lehrstuhl für Leistungselektronik Martin März Lehrstuhl für Leistungselektronik

Involved external institutions

Fraunhofer-Institut für Integrierte Systeme und Bauelementetechnologie (IISB) DE Germany (DE) Corscience GmbH & Co. KG DE Germany (DE)

How to cite

APA:

Yang, X., Pohlenz, S., Schwanninger, R., Schleippmann, N., Wunder, B., & März, M. (2023). Modelling and Design of a Droop-Based Cascaded Controller for LLC Resonant Converter. In 2023 IEEE Fifth International Conference on DC Microgrids. Auckland, NZ: IEEE.

MLA:

Yang, Xiaotian, et al. "Modelling and Design of a Droop-Based Cascaded Controller for LLC Resonant Converter." Proceedings of the 2023 IEEE Fifth International Conference on DC Microgrids, Auckland IEEE, 2023.

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