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Dimensioning of tertiary control reserve in the Italian Electricity Market: a probabilistic approach for the reserve evaluation with high RES penetration

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pubblicazioni - Presentazione

Dimensioning of tertiary control reserve in the Italian Electricity Market: a probabilistic approach for the reserve evaluation with high RES penetration

L’elevata penetrazione delle rinnovabili intermittenti comporta il bisogno di approcci probabilistici per il calcolo della riserva terziaria di potenza. Un’appropriata metodologia è stata presentata nel seminario “POWER SYSTEM DYNAMICS AND CONTROLS OF IN THE PRESENCE OF LARGE PENETRATION OF RENEWABLES”, organizzato dal Politecnico di Milano.

In the 2016, the Italian electricity system was characterized by a high level of intermittent renewables penetration with 22.5 TWh (7% total demand) and 14.5 TWh (4.6% total demand) of energy respectively supplied by PV and WIND. Intermittent renewables involves uncertainty around forecast; probabilistic approaches are therefore needed for the assessment of the balancing power reserve allocation.

In the seminary “POWER SYSTEM DYNAMICS AND CONTROLS OF IN THE PRESENCE OF LARGE PENETRATION OF RENEWABLES”, organized by the Politecnico di Milano, a probabilistic methodology was presented and it is aimed to assess the tertiary reserve margin needed to ensure the fulfilment of load demand in case of deviations from the expected values of demand itself, wind generation, solar PV generation and in case of unexpected unavailability of thermal generation and hydro pumped storage units.

Results of the methodology application to an Italian yearly case study (years: 2015 with 19.5 GW of PV and 8.9 GW of wind; 2030 with 37.6 of PV and 14.6 GW of wind) were presented, pointing out that: i) load fluctuations, on average, involve more reserve need than intermittent renewables; ii) photovoltaic fluctuations are the most impacting factor, in the central daylight hours of the hot season, iii) PV fluctuations, on average, are more impacting than wind ones.

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#Rete elettrica #Sicurezza

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