Assessment of interoperability in multi-vendor VSC-HVDC systems: interim results of the Best Paths DEMO #2

O. Despouys, P. Rault, A. Burgos, D. Vozikis, X. Guillaud, T. Larsson

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This paper describes the methodology and interim results from the ongoing European project Best Paths DEMO #2, which is the first attempt to undertake systematic investigation on interoperability in multi-vendor VSC-HVDC systems. The study is based on state-of-the-art technologies provided by three world-class HVDC vendors and involves TSOs and academics for investigations covering various HVDC layouts, from point-to-point to radial and meshed multi-terminal structures. The paper describes the methodology used to assess and maximize interoperability, which comprises two stages: the first one relies on electromagnetic transient (EMT) simulation tools, while the second and ongoing one relies on real-time simulation with actual control cubicles provided by HVDC vendors. The paper mainly reports on the different tasks which were carried out during the first stage (EMT simulations) and exhibits the results observed. The main tasks and results are listed as follows:
- Commonly agreed definition of interoperability
- Definition of common converter specifications for all involved HVDC vendors, based on the ENTSO-E Network Code for realism and replicability
- Definition of 5 different DC systems (including DC grids) on which interoperability should be assessed
- Provision of detailed vendor-specific EMT converter models, and their individual validation
- Assessment of interoperability on more than 1.000 realistic scenarios, from which 15% are representative of actual interoperability issues between the vendors
- First set of recommendations to maximize interoperability
Finally, the paper provides insights on the second and ongoing stage of the project based on real-time simulation using actual vendor control cubicles for deeper investigations.
Original languageEnglish
Title of host publication2018 CIGRE Session
Place of PublicationParis
Number of pages10
Publication statusAccepted/In press - 3 Jul 2018
EventCIGRE Paris Session 2018 - Paris, France
Duration: 26 Aug 201831 Aug 2018


ConferenceCIGRE Paris Session 2018
Internet address


  • HVDC
  • VSC
  • interoperability
  • DC grid
  • EMT
  • real-time
  • hardware in the loop


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