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This paper proposes a novel protection scheme for large doubly-fed induction motor generators (several hundreds of MVA), typically used in variable speed pump storage hydropower stations. The protection scheme makes use of non-conventional instrument transformers (NCITs) and low frequency injection to monitor the rotor currents, voltages and frequency under normal and faulty conditions. Two NCITs...
This paper describes the design and testing of a new and innovative protection relay for protecting large variable speed Double Fed Induction (DFI) machines for pumped storage plants. The testing encompasses testing of the new protection with Non-Conventional Instrument Transformers (NCITs), Rogowski CTs and resistive voltage dividers, on a small DFI machine at EPFL as well as RTDS testing of the...
An epidemiological and molecular survey was conducted to investigate the role of cattle in the transmission chain of cystic echinococcosis (CE) in the Campania region of southern Italy. Out of a total of 434 cattle examined for CE, 45 (10.4%) were found infected. A total of 363 cysts were collected from the infected animals: 239 in the liver and 124 in the lungs. The cysts were either sterile (42...
Isolates of Dicrocoelium dendriticum (n = 150) from sheep and cattle bred in southern Italy and isolates (n = 5) of D. hospes from a Bos indicus from Senegal were characterized genetically. The 28S region and the second internal transcribed spacer (ITS-2) plus flanking 5.8S and 28S sequences (ITS-2+) of ribosomal DNA (rDNA) were amplified by polymerase chain reaction and sequenced from individual...
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