A cascade voltage controller for three-phase islanded microgrids

Behrooz Bahrani, Alfred Rufer

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

6 Citations (Scopus)


This paper proposes a cascade or multiloop digital control strategy for the voltage regulation of a three-phase islanded single distributed generation (DG) unit microgrid and its dedicated load. The cascade control strategy consists of an inner dq-currents control loop and an outer dq-voltages control loop responsible for providing the set-points of the inner loop. To design the outer loop, a constrained optimization-based loop shaping method is adopted. It uses multi-input multi-output (MIMO) nonparametric or spectral models of the system for an arbitrary number of desired operating points along with a linearly parameterized MIMO controller to form a set of open-loop transfer function matrices. Minimizing the summation of the second norm of the errors between the open-loop transfer function matrices and a desired one, the coefficients of the controller are optimally determined. Taking several load change scenarios, the performance of the proposed controller is evaluated based on time-domain simulation studies in MATLAB/PLECS.

Original languageEnglish
Title of host publication2013 IEEE Power and Energy Society General Meeting, PES 2013
Subtitle of host publicationVancouver, British Columbia, Canada; 21-25 Jul 2013
Place of PublicationPiscataway NJ USA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages6
ISBN (Print)9781479913039, 9781479913022
Publication statusPublished - 2013
EventIEEE Power and Energy Society General Meeting 2013 - Vancouver, Canada
Duration: 21 Jul 201325 Jul 2013
https://ieeexplore.ieee.org/xpl/conhome/6657332/proceeding (Proceedings)


ConferenceIEEE Power and Energy Society General Meeting 2013
Abbreviated titlePES-GM 2013
Internet address


  • Cascade Control
  • Convex Optimization
  • Distributed Generation
  • Islanded Mode
  • Loop Shaping
  • Microgrid
  • Multiloop Control
  • Voltage Regulation
  • Voltage Source Converter

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