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Superconducting fault current limiter applications: Final results from the gridfield-testing activity

pubblicazioni - Memoria

Superconducting fault current limiter applications: Final results from the gridfield-testing activity

Nel marzo 2012 RSE ha completato con successo l’installazione in rete del primo prototipo italiano di un dispositivo SFCL (12 kV/4.6 MVA), lanciando conseguentemente un’attività sperimentale in campo durata più di due anni presso la sottostazione MT S.Dionigi (Milano) appartenente alla utility A2A. Questo articolo ripercorre le fasi principali del progetto, a partire dalle simulazioni e dalla realizzazione, passando per le prove preliminari in laboratorio, fino all’installazione in campo ed alla relativa sperimentazione.

Ricerca sul Sistema Energetico S.p.A. gained a relevant experience in the simulation, design, development, installation, and field testing of resistive-type Superconducting Fault Current Limiter devices in the framework of a more than five years R&D national program funded by the Ricerca di Sistema. The final result of this research activity is the installation and live-grid testing of the first Italian SFCL prototype (12 kV/4.6 MVA), that was developed and laboratory tested by RSE and then installed in the Milan MV distribution grid at the S.Dionigi substation belonging to A2A Reti Elettriche S.p.A.

This SFCL prototype has been operated, coping with the real grid conditions, for more than two years since March 2012, providing a large amount of experimental data and a significant experience in the operation and management of superconductive devices. Several technical issues had to be faced in order to make the SFCL suitable for a live-grid application. The most important of them will be briefly presented together with the corresponding solutions. This paper summarizes the main steps of this project, from the first design and laboratory testing to the final live-grid installation and field-testing activity. After having reported on the results of the SFCL device experimental activity, some details about a new upgraded SFCL device to be installed in the Milan distribution grid in early 2015, are also anticipated.

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