Switzerland has several grid levels with different voltage levels and responsibilities. Swissgrid is the owner and operator of the highest voltage level, which is known as the transmission system or transmission grid (grid level NE1). This is primarily used to transport large volumes of energy over long distances, to supply underlying grid levels and the distribution grids, and to transport the electricity produced by large power plants.
The following requirements must be met in particular in order for a system to be connected directly to the Swiss transmission grid:
The minimum installed load of systems (feed-in or feed-out) connected to the Swiss transmission grid is:
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The following requirements must be complied with. Please study them before submitting your grid connection application:
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| To plan and estimate the cost of a connection, Swissgrid needs information that is as precise as possible regarding the planned location of the systems to be connected. A location close to an existing Swissgrid substation is an advantage (see grid map). |
| Swissgrid requires confirmation in the application form that the operation of the systems to be connected at the planned location is possible in accordance with the zoning regulations. |
| The security conditions for electrical systems operated by Swissgrid and/or partner systems must be guaranteed at the planned location (e.g. distances to be observed in accordance with the «Ordinance on Electric Lines and Cables (Lines Ordinance, LineO)» ). |
| A grid connection transformer represents the connection element for the systems to be connected to the transmission grid. The grid connection transformer and all the systems connected behind it are the property of the grid connected party. They are to be procured, constructed, operated and maintained by the grid connected party, and must be located on land owned by the grid connected party or land for which they have construction rights. |
| The costs for the construction of the connection are borne in accordance with the General conditions for the connection to the Swiss transmission system (ABNA). Swissgrid collects a grid connection charge from the grid connected party. The grid connection systems at transmission grid level are owned by Swissgrid and are procured, constructed, operated and maintained by Swissgrid. |
| Swissgrid may require the grid connected party to provide a financial guarantee that the costs incurred in connection with the grid connection can be borne. |
| The grid connected party must commission an operator with the necessary qualifications to operate its systems. See the General conditions for the connection to the Swiss transmission system (ABNA). |
| Swissgrid is not an energy supplier or consumer (with the exception of ancillary services, by means of a separate agreement). The grid connected party must conclude a supply or purchase agreement with a supplier or customer. Energy is exchanged in its supply network on NE1. |
In the context of the transformation of the energy system, flexibility is becoming increasingly important in the transmission grid. The connection of battery storage systems and other energy storage systems therefore plays a crucial role.
You can use your storage system to provide ancillary services and thereby contribute to the stability and efficiency of the grid, while also benefiting from market-based tenders. To participate in tenders, you must prequalify your system.
Based on current experience, the commissioning of a connection takes between three and ten years after receipt of the application. The construction time required is determined in particular by land acquisition, authorisations, delivery times for the electrical components that need to be procured and capacities for the implementation work.
If your project meets the requirements for a grid connection to the Swiss transmission grid, you can submit a grid connection application (in German) to Swissgrid. Please send the completed application form to netzanschluss@swissgrid.ch.