Wind power expansion and security assessment: a 2020 scenario in Sardinia

Abstract

The integration of larger and larger amounts of wind and solar power is a major target of the European Union. However adding renewable generation brings about a variable and only partly predictable source of power generation to a power system that has to balance generation and varying demand at all times. This represents a challenge for power system planning and operation. To this regard, different approaches (ranging from more conservative deterministic procedures to more refined probabilistic algorithms) have been proposed to assess the maximum penetration level of renewable sources (especially wind power) in power systems.The paper presents a procedure aimed at evaluating the maximum wind power which can be integrated in the Sardinian power system in relation to frequency stability issues, with different assumptions involving the regulation capability of wind farms at a 2020 scenario.Index Terms-security assessment, wind power, frequency control, dispatching

Impact analysis of load control for frequency regulation: The case of Sardinia in 2020

“…The aggregated load of Sardinia ("yes DSM" plus "no DSM") is equal to 1200 MW, which is close to the statistical minimum of 1100 MW, as detailed in [11]. This can be considered typical of a non-working day.…”

“…This condition affects the dispatching of traditional power plants and drastically reduces the rotational inertia. A suitably detailed model of this network has been developed in [11] to study the effect of wind power expansion. Table I gives a synthetic description of this model, which has been enriched with the implementation of controlled loads, according to the DSM strategy described in Section II.…”

“…The main contribution of the present paper is an analysis of the impact on frequency regulation of a DSM strategy through a simulation study, within a realistic scenario of the Sardinian electric network in a 2020 forecast horizon [11]. This scenario is of particular interest because Sardinia is one of the Italian regions with the higher penetration of wind and photovoltaic (PV) generation.…”