Stability of DC Voltage Droop Controllers in VSC HVDC Systems

Florian Thams, Jon Are Suul, Salvatore D’Arco, Marta Molinas, Friedrich Wilhelm Fuchs

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Abstract

Future multi-terminal HVDC systems are expected to utilize dc voltage droop controllers and several control implementations have been proposed in literature. This paper first classifies possible dc droop implementations in a simple framework. Then, the small-signal stability of a VSC-based converter station is analyzed for all the identified droop control schemes. The stability range for the system is determined as a
function of the droop gain and is used to compare the flexibility and robustness of the implementations. The comparisons reveal that the droop implementations based on the ac current and dc voltage achieve a wider stability region than the other schemes and a limited sensitivity to the droop gain.
Original languageEnglish
Title of host publicationProceedings of 2015 IEEE Eindhoven PowerTech
Number of pages7
PublisherIEEE Press
Publication date2015
DOIs
Publication statusPublished - 2015
Event2015 IEEE Eindhoven PowerTech - Eindhoven, Netherlands
Duration: 29 Jun 20152 Jul 2015

Conference

Conference2015 IEEE Eindhoven PowerTech
CountryNetherlands
CityEindhoven
Period29/06/201502/07/2015

Keywords

  • DC voltage droop control
  • Power transfer capability
  • Stability
  • VSC HVDC systems

Cite this

Thams, F., Suul, J. A., D’Arco, S., Molinas, M., & Fuchs, F. W. (2015). Stability of DC Voltage Droop Controllers in VSC HVDC Systems. In Proceedings of 2015 IEEE Eindhoven PowerTech IEEE Press. https://doi.org/10.1109/PTC.2015.7232614