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Stability of voltage and frequency control in distributed generation based on parallel-connected converters feeding constant power loads

Publiceringsår: 2007
Språk: Engelska
Sidor: 38-46
Publikation/Tidskrift/Serie: EPE Journal
Volym: 17
Nummer: 3
Dokumenttyp: Konferensbidrag
Förlag: EPE Association


In this paper stability and dynamic properties of voltage and frequency droop control of power electronic converters are investigated for a distributed generation system. Droop control is utilized to share active and reactive power among the source converters. The voltage and frequency controllers are designed so that stand-alone converter operation feeding constant power loads performs satisfactory. These controllers are adapted to mimic the behaviour of present rotating generators connected directly to the power system, for seam-less transfer between island and grid-connected modes of operation. The target system for the analysis is a stand-alone system to which three power electronic converters and one rotating generator could be connected (Fig. 1). Small-signal and switch-mode, time-domain simulation results of a threeconverter distributed generation system facilitating stand-alone operation verify the operation. Simulation and experimental results of a three-converter stand-alone system, with and without a rotating generator present, are also included for verification.


  • Other Electrical Engineering, Electronic Engineering, Information Engineering
  • three-converter stand-alone system
  • stand-alone converter operation
  • reactive power sharing
  • active power sharing
  • power electronic converters
  • droop control
  • voltage control
  • constant power loads
  • frequency control
  • rotating generators
  • three-converter distributed generation system
  • parallel-connected converters


  • ISSN: 0939-8368

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