Energy-based control design for a solid state transformer

Xiaolin Mao, Sixifo Falcones, Raja Ayyanar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

25 Scopus citations


This paper addresses the control design for a three-stage solid stage transformer (SST). When two or more independently controlled converter stages are cascaded, which is the case for the three-stage SST, the interaction among the stages can lead to instability. Normally, the input and output impedances of the cascaded stages need to be examined according to the impedance criterion to ensure stability. In this paper, a novel energy-based control design method is proposed for the three-stage SST that enables decoupled control design for the rectifier and DC-DC stages, which avoids the need for the impedance checking and hence significantly simplifies the control design. The energy-based concept also works well with the power control methods commonly used such as those based on the DQ frame or the instantaneous reactive power (IRP) p-q theory, which allows for simple reactive power or power factor control. The design of the various control loops of the SST is described in detail in this paper and validated through simulations.

Original languageEnglish (US)
Title of host publicationIEEE PES General Meeting, PES 2010
StatePublished - Dec 6 2010
EventIEEE PES General Meeting, PES 2010 - Minneapolis, MN, United States
Duration: Jul 25 2010Jul 29 2010

Publication series

NameIEEE PES General Meeting, PES 2010


OtherIEEE PES General Meeting, PES 2010
Country/TerritoryUnited States
CityMinneapolis, MN


  • Control design
  • Multi-stage converter
  • Power electronic transformer
  • Solid state transformer

ASJC Scopus subject areas

  • Energy Engineering and Power Technology


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