Comparative stability analysis of LCC, MMC and dual-infeed HVDC operating with weak AC network

Stefan Kovacevic, Dragan Jovcic, Olivier Despouys, Pierre Rault

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


This paper comparatively analyses small signal stability of the LCC, MMC and the dual-infeed HVDC system considering north French AC grid. It investigates the minimum AC grid strength at which each of the three topologies can provide stable operation and have well damped dynamic performance. This is investigated by observing root locus of the dominant eigenvalues for different HVDC loading. The obtained results show that the MMC HVDC can operate at the lowest SCC (Short Circuit Capacity). The LCC HVDC can operate with weaker AC systems if the nearby MMC is operating as STATCOM. Further study with the dual-infeed system conclude that MMC controlling AC voltage is more beneficial compared to reactive power control. The results are obtained using eigenvalue study on analytical small signal models, and they are confirmed on detailed EMTP models.
Original languageEnglish
Title of host publicationProceedings of the 2020 IEEE PES General Meeting
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages5
ISBN (Electronic)978-1-7281-5508-1
ISBN (Print)978-1-7281-5509-8
Publication statusPublished - Dec 2020
Event2020 IEEE PES General Meeting - Montreal, Canada
Duration: 2 Aug 20206 Aug 2020

Publication series

NameIEEE Power & Energy Society General Meeting
ISSN (Print)1944-9925
ISSN (Electronic)1944-9933


Conference2020 IEEE PES General Meeting

Bibliographical note

This project is supported by RTE, France.


  • dual-infeed HVDC
  • small signal stability
  • eigenvalue analysis


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