Power management with a dynamic power limit by a power electronic transformer for micro-grid

Jalpa Shah, Ranjan K. Gupta, Krushna K. Mohapatra, Ned Mohan

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

12 Scopus citations


In this paper, a dynamic power limiter at the point of common coupling (PCC) of a micro-grid is proposed. A 60 Hz, step-down transformer is generally used at the PCC to connect the micro-grid to the power system grid. Substitution of the conventional 60Hz transformer by a dynamic power limiter has the following advantages: 1) Bi-directional active-power control capability at the PCC which results in enhanced micro-grid power management system during grid-connected operation, 2) Smooth transition from islanding to the grid-connected mode without the need of grid frequency synchronization, and 3) Extra degree of freedom due to the presence of active-power controller in a possible deregulation and market strategy within the micro-grid. The proposed dynamic power limiter is a high-frequency isolated power-converter system comprised of a high-frequency step-down transformer and three-phase to single-phase matrix converters. The matrix converters are modulated with a new PWM strategy for bi-directional active and reactive power flow control. Simulation results presented verify the operation of the proposed dynamic power limiter.

Original languageEnglish (US)
Title of host publicationIEEE PES General Meeting, PES 2010
StatePublished - 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


  • Distributed generation
  • Electronic transformer
  • Micro-grid


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