Robust controller design for a multilevel cascaded STATCOM

  • D. Jovcic*
  • , R. Sternberger
  • *Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingPublished conference contribution

Abstract

In this paper, the controller robustness is studied for an indirect controlled cascaded-type based multi-level Static Synchronous Compensator (STATCOM) with 'square wave control'. The MATLAB based small-signal analytical model is used to perform eigenvalue analysis and to design controllers. Two different advanced control techniques are investigated and compared against the conventional method of proportionalintegral (PI) feedback voltage control. The first strategy includes an additional current feedback, which shows minimal benefit. The second strategy considers a phase-lead compensation and indicates significantly shorter eigenvalue branches and improved robustness. The final results are confirmed with detailed nonlinear PSCAD simulation.

Original languageEnglish
Title of host publicationIEEE Power and Energy Society 2008 General Meeting
Subtitle of host publicationConversion and Delivery of Electrical Energy in the 21st Century, PES
DOIs
Publication statusPublished - 2008
EventIEEE Power and Energy Society 2008 General Meeting: Conversion and Delivery of Electrical Energy in the 21st Century, PES - Pittsburgh, PA, United States
Duration: 20 Jul 200824 Jul 2008

Conference

ConferenceIEEE Power and Energy Society 2008 General Meeting: Conversion and Delivery of Electrical Energy in the 21st Century, PES
Country/TerritoryUnited States
CityPittsburgh, PA
Period20/07/0824/07/08

Keywords

  • Controller studies
  • Multilevel converter
  • Robustness studies
  • STATCOM
  • Static VAR compensators

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