Fractionally-rated DC-DC stages for use in multilevel cascaded converter utility-scale battery energy storage systems

C. D. Townsend, G. Mirzaeva, G. C. Goodwin, G. Konstantinou, J. Pou

Research output: Chapter in Book/Conference paperConference paper

4 Citations (Scopus)

Abstract

Multilevel cascaded converters for use in battery energy storage systems (BESSs) can utilise parallel-connected dc/dc conversion stages. These stages decouple each battery string voltage from the associated H-bridge capacitor voltage. Decoupling prevents second harmonic current ripple flowing in the batteries and compensates for variation in battery voltage due to state of charge. Instead of parallel-connected converters, this paper proposes use of series-connected fractionally-rated dc-dc conversion stages. Series-connected converters are shown to maintain the benefits of voltage decoupling but with significantly lower power ratings than their parallel-connected counterparts. Lower power ratings can facilitate a reduction in semiconductor losses and a lower cost for the BESS.

Original languageEnglish
Title of host publication2016 IEEE 2nd Annual Southern Power Electronics Conference, SPEC 2016
PublisherIEEE, Institute of Electrical and Electronics Engineers
ISBN (Electronic)9781509015467
DOIs
Publication statusPublished - 1 Jan 2016
Externally publishedYes
Event2nd IEEE Annual Southern Power Electronics Conference, SPEC 2016 - Auckland, New Zealand
Duration: 5 Dec 20168 Dec 2016

Conference

Conference2nd IEEE Annual Southern Power Electronics Conference, SPEC 2016
CountryNew Zealand
CityAuckland
Period5/12/168/12/16

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Cite this

Townsend, C. D., Mirzaeva, G., Goodwin, G. C., Konstantinou, G., & Pou, J. (2016). Fractionally-rated DC-DC stages for use in multilevel cascaded converter utility-scale battery energy storage systems. In 2016 IEEE 2nd Annual Southern Power Electronics Conference, SPEC 2016 [7846101] IEEE, Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/SPEC.2016.7846101