Mu synthesized robust controller for multi-SST islanded smart grid

Tong Yao, Isaac Leonard, Raja Ayyanar, Konstantinos Tsakalis

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

4 Scopus citations


This paper introduces a robust controller design method for maintaining microgrid operation under grid islanded mode by solid state transformers (SST) using master-slave control strategy. In the grid islanded mode, the grid voltage controller of the master SST, designed using μ synthesis, ensures stable control of the microgrid voltage. This paper extends the uncertainty modeling to general grid impedance uncertainties, slave SST current command uncertainties and master SST DC link voltage uncertainties. Also, the proposed design method is general and flexible enough to be readily scaled for applications in larger power systems. A three-SST system is used to demonstrate the design method with twelve uncertainties modeled. The designed system stability and performance robustness are validated in μ analysis, PLECS simulation, and a controller-hardware-in-the-loop (CHIL) test bed with a Real-Time Digital Simulator (RTDS).

Original languageEnglish (US)
Title of host publicationECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509007370
StatePublished - Feb 13 2017
Event2016 IEEE Energy Conversion Congress and Exposition, ECCE 2016 - Milwaukee, United States
Duration: Sep 18 2016Sep 22 2016


Other2016 IEEE Energy Conversion Congress and Exposition, ECCE 2016
Country/TerritoryUnited States


  • CHIL
  • master-slave
  • microgrid
  • Robust control
  • RTDS
  • smart grid
  • SST
  • uncertainties
  • μ synthesis

ASJC Scopus subject areas

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


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