- Title
- Fractionally-rated DC-DC stages for use in multilevel cascaded converter utility-scale battery energy storage systems
- Creator
- Townsend, C. D.; Mirzaeva, G.; Goodwin, G. C.; Konstantinou, G.; Pou, J.
- Relation
- Power Electronics Conference (SPEC), IEEE Annual Southern. 2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC) (Auckland, NZ 05-08 December, 2016) p. 1-6
- Publisher Link
- http://dx.doi.org/10.1109/SPEC.2016.7846101
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Resource Type
- conference paper
- Date
- 2016
- Description
- 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.
- Subject
- multilevel converters; control strategy; battery energy storage
- Identifier
- http://hdl.handle.net/1959.13/1449108
- Identifier
- uon:43576
- Language
- eng
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