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Article RSE 16001556

Status of superconducting fault current limiter in Italy: final results from the in-field testing activity and preliminary design of the 9kV/15.6MVA device

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IEEE Transactions on Applied Superconductivity ISSN1051-8223, vol. 26 N. 3, Aprile-2016.

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V. Rossi (RSE SpA) , G. Angeli (RSE SpA), M. Ascade (RSE SpA), A. Valzasina (RSE SpA), C. Ravetta (A2A Reti Elettriche S.p.A), L. Martini (RSE SpA) , M. Bocchi (RSE SpA)

MAT4-GRID 2016 - Components for the grids

Has recently accomplished a more than two years long in-field activity on the first Italian superconducting fault current limiter (SFCL). This paper is mainly focused on the new 9 kV/15.6 MVA upgraded device: in particular the first small scale HTS winding prototypes will be described and the power tests implemented to validate their performances will be discussed. The test results allowed to identify the best layout, consisting in two parallel-connected coaxially-arranged 2G windings, each made of two layers anti-inductively wound on a fiberglass-cylinder, for a total 2G tape amount of 96 m.

Has recently accomplished a more than two years long in-field activity on the first Italian Superconducting Fault Current Limiter (SFCL). In order to carry-out the in-field activity, the 9 kV/3.4 MVA SFCL device was installed as single feeder protection inside the Milan MV distribution grid; further to this first success, the development of a new device to be installed in the same substation, but as a transformer protection, has already been initiated.

After having briefly summarized the final result of the in-field activity on the 9 kV/3.4 MVA device, this paper is mainly focused on the new 9 kV/15.6 MVA upgraded device: in particular the first small scale HTS winding prototypes will be described and the power tests implemented to validate their performances will be discussed.

The test results allowed to identify the best layout, consisting in two parallel-connected coaxially-arranged 2G windings, each made of two layers anti-inductively wound on a fiberglass-cylinder, for a total amount of 2G tape of 96 m. The actual research plan foresees to install the upgraded device in the live grid in 2016.

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