Electronics, Volume 7, Issue 5 (May 2018) – 22 articles
Cover Story (view full-size image): A 150kW single-phase 21-level solid-state transformer (SST) prototype was designed and assembled, and is shown in Figure 14. The AC/DC stage was realized using an interfacing inductor and ten cascaded H-bridge (CHB) rectifiers to support the 13.2kV medium voltage alternative current (MVAC). In DC/DC stage, for application to bipolar DC distribution, the high frequency isolated transformer (HFIT) coupled with three windings and low voltage direct current (LVDC) side is configured as a multi-terminal in which two half-bridge circuits are connected in series. The outputs of DC/DC stage are connected in parallel, and ten subunits have to be rated for only a fraction of the full power. View Paper here.
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