Switching frequency reduction for efficiency optimization in two paralleled UPS systems

In this paper, the switching frequency reduction in two paralleled Uninterruptible Power Supplies (UPS) is studied in order to obtain maximum global system efficiency. Typically, by reducing the switching frequency of a converter, its efficiency increases. However, when connected in parallel, UPSs a...

Full description

Saved in:
Bibliographic Details
Published in2020 IEEE 14th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG) Vol. 1; pp. 161 - 166
Main Authors Oliveira, Tiago J. L., Caseiro, Luis M. A., Mendes, Andre M. S., Cruz, Sergio M. A., Perdigao, Marina S.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.07.2020
Online AccessGet full text

Cover

More Information
Summary:In this paper, the switching frequency reduction in two paralleled Uninterruptible Power Supplies (UPS) is studied in order to obtain maximum global system efficiency. Typically, by reducing the switching frequency of a converter, its efficiency increases. However, when connected in parallel, UPSs are subjected to a Zero Sequence Circulating Current (ZSCC) that compromises a correct system operation and increases the losses of the global system. Experimental results show that to achieve the maximum system efficiency, the ZSCC must be effectively eliminated. Finite Control Set Model Predictive Control (FCSMPC) is used as the control scheme.
ISSN:2166-9546
DOI:10.1109/CPE-POWERENG48600.2020.9161560