Grid Development

The transmission grid must be gradually modified and expanded in compliance with the developments of electricity production and consumption.

Electricity demand and supply grow at different rates in the different areas of Italy: the combination of these elements changes electricity flows and can cause congestion on the existing grid.

For this reason, Terna prepares investment plans for grid development, in order to increase its efficiency and to keep up with the evolution of the power plants and of consumption. The works that Terna plans and implements also have positive repercussions on society: the condition for their construction is that the collective economic benefit they generate is greater than the cost. Every year Terna prepares a Grid Development Plan with the works scheduled for the following 10 years, as well as the progress made on the works planned in previous years.

Since 2008, Terna has been submitting its Development Plan to the Strategic Environmental Assessment (SEA) procedure, as provided for by the European Union’s Directive no. 42 of 2001.

Like the previous editions, the 2012-2021 Development Plan is organized in two sections. The first section contains a detailed analysis of grid status and the new development requirements that emerged in 2011; a chapter is dedicated to grid infrastructures for the development of renewable energy sources and to new widespread energy storage devices, aimed at facilitating the achievement of national targets with maximum utilization of installed capacity; there is also a new chapter containing the environmental description of areas affected by the new measures set forth in the Plan. The second section describes the progress made on the works and the environmental assessments on the development measures included in the previous Plans.

Furthermore, there is an attachment named “Connections” which contains the details of the development work that has been planned for the connection of third party plants to the NTG.

The Development Plan is available on Terna's website, in the Electricity System section.

Approved by Terna’s Board of Directors on January 31, 2012, the 2012-2021 Plan was sent for approval to the Ministry for Economic Development and to the Electricity and Gas Authority on January 31, 2012, while in March 2012 the consultation stage of the proposed 2012 Development Plan and the related Environmental Report began, according to the SEA procedure.

To verify the main expectations of our stakeholders, the Plan was submitted for prior assessment to the Grid Users’ Consultation Committee (see the “Stakeholder engagement” section), both for the new development projects and for the Plan as a whole.