The Smart Transformer: A solid-state transformer tailored to provide ancillary services to the distribution grid

Levy Ferreira Costa, Giovanni De Carne, Giampaolo Buticchi, Marco Liserre

Research output: Contribution to specialist publicationArticle

193 Citations (Scopus)

Abstract

The solid-state transformer (SST) was conceived as a replacement for the conventional power transformer, with both lower volume and weight. The smart transformer (ST) is an SST that provides ancillary services to the distribution and transmission grids to optimize their performance. Hence, the focus shifts from hardware advantages to functionalities. One of the most desired functionalities is the dc connectivity to enable a hybrid distribution system. For this reason, the ST architecture shall be composed of at least two power stages. The standard design procedure for this kind of system is to design each power stage for the maximum load. However, this design approach might limit additional services, like the reactive power compensation on the medium voltage (MV) side, and it does not consider the load regulation capability of the ST on the low voltage (LV) side. If the SST is tailored to the services that it shall provide, different stages will have different designs, so that the ST is no longer a mere application of the SST but an entirely new subject.

Original languageEnglish
Pages56-67
Number of pages12
Volume4
No.2
Specialist publicationIEEE Power Electronics Magazine
DOIs
Publication statusPublished - Jun 2017
Externally publishedYes

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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