It is important to 50 Hertz to make the processes for grid connection as transparent as possible and we would like to provide customers with an overview of the conditions for grid connection and grid access.
Below, customers of 50Hertz will find more detailed information on our system diagram and the rules on grid connection and grid access. Detailed information on grid connection procedures and regulations as well as model contracts for suppliers and distribution system operators are available for download below.
50Hertz takes care of the operation, maintenance, planning and expansion of the 380/220 kilovolt transmission system in the federal states of Thuringia, Saxony, Saxony-Anhalt, Brandenburg, Berlin, Mecklenburg-Western Pomerania and Hamburg.
The transmission grid operated by 50Hertz covers a surface of 109,589 km² and has a total transmission length of approximately 10,000 km.
Please click on the graphic to download the diagram.
Pursuant to the European Internal Electricity Market Directive and the Energy Industry Act (EnWG) of May 2005, operators of electricity supply networks are obliged to define and publish conditions for grid connections. This may include (but not limited to) the connection of generating units, electricity distribution systems, plants of directly connected customers, distribution and direct lines as well as technical minimum requirements for their design and operation. In addition, they are required under § 20(1) of the EnWG to publish terms for grid access.
In order to implement these conditions, 50Hertz published the guidance titled ‘Grid connection and grid access rules of 50Hertz Transmission GmbH - minimum technical and organisational requirements’:
Grid connection and grid access rulesDownload PDF in German (712 KB)
The ‘Terms of Grid Connection and Grid Access’ are based on the ‘Transmission Code 2007 - Grid and System Regulations of German Transmission System Operators’. The ‘Terms of Grid Connection and Grid Access’ define the minimum technical requirements for connection to the 50Hertz transmission system and the criteria governing feed-in from production units (PUs), including those using renewable energy sources, in the 50Hertz grid area. They are subject to amendment, in particular if and when changes to the business or legal environment of the transmission system operator (TSO) occur.
Furthermore, the tasks of system management and the assumption of system responsibility of the TSO vis-à-vis the grid connection customers are described in clear terms and the latter’s participation in system support services is set out.
The Terms form an integral part of the grid connection and grid use contracts to be concluded with the market parties.
Grid connection customers are obliged to comply with the given minimum requirements. 50Hertz reserves the right to verify compliance with the ‘Terms of Grid Connection and Grid Access’. Grid connection customers are expected to provide all assistance required.
The ‘Terms of Grid Connection and Grid Access’ apply both to grid connection customers connecting their technical installations to the 50Hertz grid for the first time, and to those who are modifying their already connected installations.
Modifications to an installation are deemed to include any technical change, such as conversions, extensions, partial or full dismantling, modification of the electrical characteristics at the terminals and changes made to the grid connection capacity, the protection concept and neutral-point connection.
The present ‘Terms of Grid Connection and Grid Access’ are identical in content with those of our legal predecessor (as of May 2008). 50Hertz reserves the right to modify and/or update the ‘Terms of Grid Connection and Grid Access’ and the present information.
In accordance with § 17 of the German Energy Industry Act (Energiewirtschaftsgesetz – EnWG) of May 2005, operators of energy supply systems are obliged to connect customers to their systems under technical and commercial terms that are adequate, non-discriminatory and transparent.
One of the legal documents where these requirements are described in detail is the German Ordinance on Grid Connection of Power Plants (Kraftwerks-Netzanschlussverordnung, KraftNAV) which came into force in June 2007.
The grid connection procedure of 50Hertz Transmission GmbH is transparent and non-discriminatory. The documents available for download illustrate the procedure complete with content and deadlines, using the examples of a conventional power plant and a renewable energy plant onshore.
Operators of electricity supply grids working at a voltage of 110 kV or more (conventional power plants) are obliged to disclose information concerning their grids as stipulated in § 3 subs. 1 of the German Ordinance [KMH1] on Grid Connection of Power Plants (Verordnung zur Regelung des Netzanschlusses von Anlagen zur Erzeugung von elektrischer Energie; Kraftwerks-Netzanschlussverordnung; KraftNAV) of 26 June 2007. We gladly fulfil this obligation on this page.
The German Oordinance [KMH2] on Grid Connection of Power Plants (KraftNAV) regulates a nationwide standard procedure for connecting new power plants to the existing electricity system. KraftNAV was devised against the background of the phase-out of nuclear energy (subject to residual electricity production rights being granted) which was laid down by law in 2002. KraftNAV has been designed to close a ‘gap’ in electricity supply anticipated for the medium term and regulate the details of non-discriminatory connection to the system. Its purpose was to allow for investments in new power plants to be performed speedily and on the basis of the non-discrimination principle. KraftNAV applies to the connection of generating units with a nominal capacity of 100 megawatts or more to electricity supply systems at a voltage level of at least 110 kilovolts.
To be connected to the grid of 50Hertz Transmission GmbH, customers must conclude a contract with 50Hertz (grid connection contract).
The grid connection contract governs connection of the customer’s electrical systems to the transmission system of 50Hertz and stipulates the pertinent rights and duties. In particular, these concern the arrangements on operating safety and security as well as the condition of plants and systems, the access to them and positive comity.