Smart Transmission Solutions

One of Terna's main needs is to make the transmission grid dynamic, i.e. capable of evolving rapidly and effectively with respect to scenarios that change quickly and unpredictably.

In the Development Plan, Terna has planned actions capable of ensuring, under various operating conditions, the electricity system’s needs for security, reliability and efficiency, maximizing the timely and flexible use of existing infrastructure and thus facilitating integration of growing production from renewable sources, including those not directly connected to the NTG.

Among these we can note:

  • installation of electrical equipment (PST - Phase Shifting Transformers) for power flow control on the High and Very High Voltage grids;
  • installation of synchronous condensers to improve the stability and operating security of the system;
  • installation of reactors and condensers for proper management of reactive power flows on the grid, with consequent cost reduction for the Dispatching Market;
  • use of high-capacity conductors to maximize the transport capacity of the existing lines also on the basis of the temperature (Dynamic Thermal Rating - DTR). The testing will make it possible to define types and standards for applying the method for the purposes of progressive implementation and diffusion on critical routes for high wind power production starting from the South and Sicily;
  • testing of diffused accumulation systems to maximize the exploitation of power from renewable sources and to improve the regulation of the High and Very High Voltage systems;
  • initiatives based on smart logics aimed at improving the prediction and control of distributed generation.

These solutions are generally characterized by reduced environmental impact (because they enable maximisation of existing asset use), and by implementation times and costs which are typically lower than those necessary for the creation of new network infrastructures (high voltage lines and stations).

Also regarding innovative solutions, the following initiatives are planned:

  • Participation in the GREEN-ME project (Grid integration of Renewable Energy sources in the North - Mediterranean): the project was presented to the European Commission, in the context of the Connecting Europe Facility, by Italian and French TSOs and DSOs (Distribution System Operators), and relates to the development of systems required to integrate distributed generation in an area stretching from the South of France to the Regions of Northern Italy. The project is conditional on the possible financing of the activities envisaged by the European Commission.
  • Improvement of the identification and control of the grid with digital systems: exploiting the potential of digital equipment to provide measurements directly for the analysis and monitoring of service quality.
  • Monitoring grids: the growing impact of renewable sources also on the distribution grids calls for data collection and modelling which would enable a more detailed view of the load/generation on distribution systems that operate with the transmission grid.