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Renidamo programmable renewable energies

The solution for the constant use of non-programmable renewable energy

The increasing spread of nonprogrammable renewable generation and the future phase-out of coal-fired plants will lead to significant issues in the coming years in terms of the need to compensate for the variability of electricity generation and the reduction of the inertia of the Italian electricity system.

This has resulted and will result in the continuous reduction of the “rotating masses” (the alternators connected to the turbines of the thermoelectric plants) of the electric system and the consequent reduction of the inertia of the system.

In an electric system, any imbalance between generation and power demand causes, in the first moments, a slowdown or acceleration of the rotating masses to which a change in frequency corresponds.

It is absolutely important that this variation be minimal (in any case contained within a predetermined range) and have the shortest possible duration.

Variations will be larger (and more dangerous to system equilibrium) in inverse proportion to the inertia of the rotating masses.

System inertia is therefore a critical factor in the frequency stability of the power grid and is a safety factor against possible blackouts, even geographically extensive ones.

By virtue of their technological characteristics, electrochemical storage is one of the possible enabling factors of the energy transition underway, contributing to:

1

Provide ancillary network services (e.g. frequency regulation) and support for system stability (e.g. inertia)
2

Limit wind and PV curtailment (expected to increase in the absence of other measures) and reduce grid congestion phenomena
3

Optimize investments in network infrastructures

From the point of view of grid services, batteries represent a particularly suitable technology for supplying the frequency regulation service (Fast Reserve, Primary and secondary) and voltage regulation.

Source Terna 2020 Development Plan