On-off Control of an Active Load for Power System Damping - Theory and Field Test

Olof Samuelsson, Magnus Akke

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingResearchpeer-review

11 Citations (SciVal)


Controlled resistive loads can contribute to damping of electro-mechanical oscillations. This paper presents an on-off damping controller for a single machine system. It was used at a field test in Southern Sweden to damp oscillations of a 0.9 MW hydro power generator. The controller used estimated machine frequency as input and controlled a 20 kW resistive load via thyristor switches. The field measurements are compared to time simulations and a systematic procedure for tuning the controller is given. The results indicate that on-off control of active loads is effective in terms of added damping and that it is simple to tune and implement
Original languageEnglish
Title of host publicationIEEE Transactions on Power Systems
Publication statusPublished - 1999
EventIEEE Power Engineering Society 1999 Winter Meeting - Piscataway, New York, United States
Duration: 1999 Jan 31 → …

Publication series

ISSN (Print)0885-8950


ConferenceIEEE Power Engineering Society 1999 Winter Meeting
Country/TerritoryUnited States
CityPiscataway, New York
Period1999/01/31 → …

Subject classification (UKÄ)

  • Other Electrical Engineering, Electronic Engineering, Information Engineering


  • control system analysis control system synthesis damping hydroelectric generators hydroelectric power on-off control oscillations power system control


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