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 language | English |
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| Title of host publication | 2016 IEEE 2nd Annual Southern Power Electronics Conference, SPEC 2016 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| ISBN (Electronic) | 9781509015467 |
| DOIs | |
| Publication status | Published - 2016 |
| Externally published | Yes |
| Event | 2nd IEEE Annual Southern Power Electronics Conference, SPEC 2016 - Auckland, New Zealand Duration: Dec 5 2016 → Dec 8 2016 |
Publication series
| Name | 2016 IEEE 2nd Annual Southern Power Electronics Conference, SPEC 2016 |
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Conference
| Conference | 2nd IEEE Annual Southern Power Electronics Conference, SPEC 2016 |
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| Country/Territory | New Zealand |
| City | Auckland |
| Period | 12/5/16 → 12/8/16 |
Bibliographical note
Publisher Copyright:© 2016 IEEE.
ASJC Scopus Subject Areas
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering
Keywords
- battery energy storage
- control strategy
- Multilevel converters