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Deliverable 1.5: Quantification of requirements

This Deliverable 1.5 of the PROMOTioN project contains definitions of which requirements are quantifiable and presents a list of the quantified requirements of a Meshed Offshore Grid (MOG).

Four overlapping interfaces were defined to structure this document. The specific interfaces have requirements which guarantee the system requirements.

The list is based on the qualitative requirements that were agreed in Deliverable 1.1 [Download 3MB].

  • MOG – Onshore AC interface: which puts constraints on the tolerable variations of the power output and quality, which imposes requirements on the MOG. Here the ENTSO-E HVDC grid code (NC HVDC) is taken as a starting point.
  • MOG – Offshore generation interface: which puts requirements on the power output of offshore AC generation. Here the ENTSO-E code on Requirements for Generators (NC RfG) as well as the NC HVDC are used as a starting point.
  • MOG – Offshore consumption interface: Which describes possible connections to offshore consumers. Connecting demand offshore is not the main purpose of the MOG, but could contribute to its attractiveness in certain cases. Since in D1.1 no specific requirements for offshore load were developed as possible connections will be evaluated on a case-by-case basis, quantification of requirements is not defined.
  • MOG Operability interface: describes the requirements for steady state operation, operation of the DC grid and requirements to protection systems of the MOG. Jointly these overlapping interfaces cover all technical aspects of the MOG.


Since this deliverable depends heavily on the Network Code for the HVDC connections (NC HVDC) it is important to note that NC HVDC focuses on DC transmission grids’ point to point connections, as well as extensions to multi-terminal radial connections. Meshed DC grids and DC collection grids are out of the scope of this network code. It is envisaged that meshed DC grids could gradually emerge for some applications in the future but this technology will need time to develop. Therefore meshed DC networks are considered out of the scope of the present NC HVDC, with possible inclusion in future amendments once the technology matures. Future revisions of the NC HVDC are expected to bring a meshed grid forward as the DC grid technologies move into implementation. Therefore this Deliverable also aims to identify where deviations are necessary for a MOG to develop, which are addressed in the discussion paragraph of each chapter.