Connecting new plants

Terna has an obligation to connect all potential users that request connection to the Grid, identifying connection solutions on the basis of criteria that enable continuity and operating security of the grid on which the new plant is to be inserted. In particular, Terna is responsible for connecting to the National Transmission Grid plants with power of at least 10 MW, and for coordinating interconnection between the grids of other operators, such as distributors and/or grids with obligation of third party connection, when the requests received by the latter also determine the need for expansion towards the NTG.

Activities to provide access to the grid infrastructure is regulated by the Electricity and Gas Authority (AEEG). The current regulations govern many stages of the process of providing access to the grid infrastructure, establishing times and costs. Terna's activities include initial preparation and sending of the connection estimate to the applicant - necessary in order to obtain authorization from the agencies in charge - which includes a connection solution based on the assessment of the impacts the plant to be connected will have on the grid. After authorisation, it is once again Terna's responsibility to define a detailed technical solution which allows the final phase of the project to start.

The following histogram shows the connection requests received by Terna starting in 2005, the year in which the procedure described was started. The graph reveals how, against an initial acceleration, pushed by the strong incentives on the regulatory front, today there is a contraction in the requests as incentives decrease. The cumulative curve lists the valid requests, processed by Terna over time, for which the authorization procedure is still under way with the agencies in charge. The 2012 reduction is linked both to plants that have completed their own grid connection process (plants that are now operating) and the expiry of certain initiatives. 

Connecting new plants