Current injection methods for ripple-current suppression in delta-configured split-battery energy storage

dc.creatorLi, Zhongxi
dc.creatorLizana, Ricardo
dc.creatorLukic, Srdjan M.
dc.creatorPeterchev, Angel V.
dc.creatorGoetz, Stefan M.
dc.date2020-06-12T22:44:01Z
dc.date2020-06-12T22:44:01Z
dc.date2019-08
dc.date.accessioned2022-10-18T12:07:17Z
dc.date.available2022-10-18T12:07:17Z
dc.identifierIEEE Transactions on Power Electronics, Volume 34, Issue 8, August 2019, pages: 7411 - 7421
dc.identifierhttp://repositoriodigital.ucsc.cl/handle/25022009/1855
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/4441489
dc.descriptionArtículo de publicación Web of Science
dc.descriptionCascaded H-bridge (CHB) converters are receiving growing attention in battery energy storage systems (BESS) due to their modularity and flexibility. However, direct generation of ac output in CHB-BESSs incurs large second-order current ripple in the batteries, which causes additional loss and might accelerate battery aging. Existing methods for ripple-current suppression usually require bulky passive components due to the high energy content of the ripple components. This paper presents a class of current injection methods for delta-configured CHB-BESSs. The injected currents flow through the CHB arms and transfer the original second-order oscillating power to the fourth or the sixth order, or even to an arbitrarily high-order frequency. As such, the battery current ripple appears at much higher frequencies with lower oscillating energy and can be easily filtered by small passive components. In the laboratory setup, the proposed methods reduced the battery root-mean-square current ripple to less than 10% of the dc component with negligible distortion in the loads. The proposed methods and the filter implementations show good tolerance to load frequencies and to the control error of the injected currents.
dc.languageen
dc.publisherIEEE Transactions on Power Electronics
dc.sourcehttps://ieeexplore.ieee.org/document/8523800
dc.subjectDelta configuration
dc.subjectCascaded H-bridge
dc.subjectSplit-battery system
dc.subjectRipple-current reduction
dc.titleCurrent injection methods for ripple-current suppression in delta-configured split-battery energy storage
dc.typeArtículos de revistas


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