Electricity system security 2012

Ensuring the security of the National Electricity System interconnected with the European network is a delicate task that Terna implements through a series of actions governed by rigorous assessment of the operational risks.

The objective is to keep within preset limits the probability of interruption of service and to minimise the negative consequences of disservices should they occur.

For Terna, preventing and reducing the risk of significant disservice means monitoring and protecting the physical integrity of the plants, arranging defence plans that limit the consequences of possible disservices, carrying out the preventive scheduling of the operation, improving control capacity in real time, training staff, developing new methods of support for the scheduling and control process, enhancing the reliability of the means of support, and coordinating the management of systems interconnected with neighbouring TSOs.

The projects are included in the electricity system Security Plan, prepared by Terna and approved by the Ministry of Economic Development. The Plan, which reached its ninth edition in 2012, is drawn up every year and has a four-year programming period. The approach to electricity system security becomes increasingly structured in each edition of the Plan.

The current structure of the Security Plan envisages 8 different areas for scheduling, control, regulation and protection, restart and monitoring of the electricity system, and an area for the secure and optimal management of renewable sources.

The 2012 Plan also includes projects for system management in expected operational scenarios in the medium-long term, characterised by important new elements, including increased production distributed by renewable sources.

In addition, in order to facilitate the full integration of these plants and resolve security criticalities associated with them, the current Plan envisages new initiatives that provide for the implementation and use of non-conventional systems for frequency regulation on the major islands, based on electrochemical accumulation systems.

In 2012 investment in the Security Plan amounted to €63 million.

The ninth edition of the Security Plan for 2012-2015 provides for investments of around €242 million.