Network Codes for Grid Connection
Network codes and related guidelines are a set of rules drafted by ENTSO-E, with guidance from ACER. The codes facilitate the harmonisation, integration and efficiency of the European electricity market. More information regarding the network codes and related guidelines are available at ENTSO-E's website.
Implementation of connection codes in Norway
Current practice for approval of units’ grid connection to the transmission and higher voltage distribution grids in Norway
Under the current Norwegian regulation, the TSO (Statnett) approves the technical design of generators, network units and industry connections, before units may connect to the transmission and higher voltage distribution grids. This is pursuant to § 14 and § 20 of the Norwegian regulations for system operation (in Norwegian). Statnett is granted the right to set requirements for grid connection through the Norwegian system operation concession. The intention is to ensure that new installations contribute to a satisfactory quality of supply, as well as efficient development and utilisation of the Norwegian power system.
Statnett has developed a national guideline that presents the minimum technical requirements it requires for approving connection to the transmission and higher voltage distribution grids. This national guideline is called FIKS (functional requirements in the power system). Today’s requirements in FIKS cover hydro, wind and thermal power plants with an installed capacity greater than 1 MVA, as well as grid units and to a minor extent large industry connections.
Additionally, bilateral connection agreements are made between grid users and grid system operators on all voltage levels.
National implementation process
RME requested Statnett to review the technical requirements in the connection codes, in close collaboration with national stakeholders. Three separate stakeholder groups were established, each working with one of the three connection codes. The national industry associations within the energy sector selected the participants among their stakeholders, based on technical expertise. The composition of each stakeholder group represented a cross section of the industry, to ensure that all relevant technical issues were addressed.
The main points in the request to Statnett for the technical review were:
- Identify differences in the three connection codes compared to the current practice in Norway.
- Propose national specifications of the non-exhaustive requirements in the codes.
- Propose Norwegian procedures and allocation of responsibility for requirements following the connection codes.