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Recent Test Experience on Medium Voltage Fault Current Limiters

rapporti - Deliverable

Recent Test Experience on Medium Voltage Fault Current Limiters

I limitatori della corrente di guasto a superconduttore (SFCL) costituiscono una delle applicazioni di potenza più interessanti della superconduttività. Questo articolo presenta due recenti esperienze sul testing di dispositivi SFCL per media tensione condotte a Milano presso gli impianti di RSE/CESI. La prima esperienza è stata condotta nell’ambito del progetto nazionale R&D italiano volto all’installazione di un dispositivo SFCL 9 kV/3.4 MVA nella rete di distribuzione di A2A Reti Elettriche S.p.A. all’interno dell’area di Milano; la seconda esperienza ha riguardato i test di qualificazione del dispositivo SFCL da 24 kV sviluppato all’interno del progetto europeo ECCOFLOW nell’ambito del settimo programma quadro.

Fault current limiters are one of the most interesting applications of superconductors in the power sector. In the last decade several projects have been launched and many efforts are nowadays being devoted to the installation of Superconducting Fault Current Limiters (SFCL) prototypes in real distribution grids. Utilities can easily benefit from the installation of such devices, which are able to overcome the problem of the ever rising short-circuit currents, but at the same time they call for the reliability standards to be properly met. This paper deals with two recent testing experiences on medium voltage fault current limiters. The first experience was performed in the framework of the Italian R&D national project for the installation of a 9 kV/3.4 MVA SFCL in the A2A Reti Elettriche S.p.A. distribution grid within the Milano area; the latter was related to the qualification testing of the 24 kV SFCL developed in the framework of the European FP7 Project ECCOFLOW. In both cases, dielectric tests were performed at the Ricerca sul Sistema Energetico (RSE) S.p.A. test facilities, whereas high power tests were performed at the CESI labs.

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