Transient stability analysis in Multi-terminal VSC-HVDC grids

A. G. Endegnanew, K. Uhlen, T. M. Haileselassie, O. Anaya-Lara

Research output: Chapter in Book/Report/Conference proceedingChapter

8 Citations (Scopus)
176 Downloads (Pure)


A novel approach to transient stability analysis in multi-terminal high voltage direct current (MTDC) grids is presented in this paper. A symmetrical three-phase fault in an ac grid connected to a rectifier terminal of the MTDC grid causes the power injected into the dc grid to decrease, which in turn leads to a lower dc voltage in the MTDC grid. If dc voltage drops below a critical voltage limit before the ac fault is cleared, then the dc grid becomes unstable and its operation is disrupted. An analytical approach is proposed in this paper to calculate the critical clearing time of a fault in an ac grid behind a rectifier terminal beyond which dc voltage collapse occurs. A five-terminal MTDC grid modeled in EMTDC/PSCAD is used to validate the results obtained with the analytical method.
Original languageEnglish
Title of host publication2016 Power Systems Computation Conference (PSCC)
Place of PublicationPiscataway, N.J.
ISBN (Print)978-88-941051-2-4
Publication statusPublished - 11 Aug 2016
Event19th Power Systems Computation Conference - Porto Antico Conference Centre, Genoa, Italy
Duration: 20 Jun 201624 Jun 2016


Conference19th Power Systems Computation Conference
Abbreviated titlePSCC 2016
Internet address


  • rectifiers
  • power system stability
  • voltage control
  • transient analysis
  • load flow


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