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The decarbonisation of Sardinia is postponed to 2028

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The decarbonisation of Sardinia can wait. Because the shutdown of the two coal-fired power plants is expected to postpone from 2025 (date scheduled and foreseen by the Pniec) to 2028, when the Thyrrhenian link will come into operation and will be fully operational. In other words, the double submarine cable (950 kilometers and 1000 mw of power) will connect Sicily with Sardinia and the Italian peninsula with an investment of 3.7 billion euros.
The shift is linked to the need to guarantee Sardinia’s energy needs and avoid imbalances in the system and the entire supply system currently guaranteed by coal-fired plants.

The Terna report

This is what emerges from Terna’s “Italy 2021 Adequacy Report” which analyzes the system’s ability to meet energy demand at any hour and in every area of ​​the country over the next ten years. “To enable the decarbonization process of the electricity system, especially for 2025 – reads the report -, strategic interventions will be necessary to promote the authorization and construction of new capacity to replace the one already planned for decommissioning”. No improvisation, therefore, but choices and actions that must limit problems and inconveniences to the system as much as possible, and ensure energy continuity. «The decommissioning of coal-fired plants can be completed, in conditions of adequacy, only through the creation of new capacity – it continues -. The procurement of the capacity necessary to complete the coal decommissioning process on schedule and at the same time reach the LOLE 3 h / year target can be achieved through new Capacity Market auctions ».

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The Sardinian knot

The document indicates the critical issues concerning the island. In other words, the fact that “the decommissioning of the coal plants, Fiume Santo and Sulcis (for a total installed power of about 1000 MW), with the current transmission capacity with the continent, would not allow to respect the limit value of 3 hours at year of year of LOLE ». That is, the total number of hours in which the detachment of a part of consumers is likely to occur because the expected demand exceeds the resources available to satisfy it.

The supercable solution

To overcome this criticality, according to what Terna writes, and to allow the decommissioning of coal plants, it will be necessary to “create new capacity for approximately 500 MW of CDP appropriately distributed on the island and create the new Central South – Sicily – Sardinia link (Tyrrhenian Link) “. Just as the Tyrrhenian Link which “will gradually enter service in the period 2026-2028” can mitigate the difficulties and the various problems related to a “poorly meshed network”, “non-programmable Fer generation plants” and “captive production”.

The divestment

The forecast is that of gradual steps and where there will be some sort of compensation. «The decommissioning of the island’s coal-fired generation can therefore take place progressively as the new resources (the Tyrrhenian Link and the 500 MW of the new CDP) come into service – the report states -; the complete decommissioning can be realized only after the complete realization of the new connection and the full availability of the new programmable capacity “.

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