SPIDER experiment, currently under construction at the Neutral Beam Test Facility (NBTF) in Padua, Italy, is a full-size prototype of the ion source for the ITER Neutral Beam (NB) injectors. The Ion Source and Extraction Power Supplies (ISEPS) for SPIDER are supplied by OCEM Energy Technology s.r.l. (OCEM) under a procurement contract with Fusion for Energy (F4E) covering also the units required for MITICA and ITER injectors. The detailed design of SPIDER ISEPS was finalised in 2011. Manufacture of most components was completed by end 2013 and the Factory Acceptance Tests (FAT) took place early 2014. ISEPS, with an overall power rating of 5 MVA, form a heterogeneous set of items, ranging from power transformers, medium voltage power distribution equipment at 6.6 kV to solid state power converters and including 1 MHz radiofrequency generators of 200 kW output power. Both high voltage, down to -12 kV and high current, up to 5kA, power supplies are present. SPIDER ISEPS will be installed in the NBTF SPIDER High Voltage (HV) Hall, on an air-insulated platform (-HV Deck?), at a nominal voltage to ground of -100kVdc. The limited space available within the HV Deck makes optimisation of the layout a critical aspect. The paper presents the main features of the detailed design developed by OCEM, focussing in particular on the high output voltage pulse step modulators, the high output current resonant converters, the radiofrequency generators by HIMMELWERK GmbH and the architecture and implementation of the complex control system coordinating the individual power supplies. Development and testing of prototypes for power conversion modules and control system customised electronics are also covered. Details are given on non-standard FAT verifying the insulation requirements specific to this application. Performance of ISEPS during the FAT is described and commented against the specifications, with emphasis on demonstration of the load protection requirements, a crucial point for all NB power supplies. Finally, key dates of SPIDER ISEPS installation and site testing schedule are provided.
Design, manufacture and factory testing of the Ion Source and Extraction Power Supplies for the SPIDER experiment
Modesto Moressa;Mauro Recchia;Vanni Toigo
2014
Abstract
SPIDER experiment, currently under construction at the Neutral Beam Test Facility (NBTF) in Padua, Italy, is a full-size prototype of the ion source for the ITER Neutral Beam (NB) injectors. The Ion Source and Extraction Power Supplies (ISEPS) for SPIDER are supplied by OCEM Energy Technology s.r.l. (OCEM) under a procurement contract with Fusion for Energy (F4E) covering also the units required for MITICA and ITER injectors. The detailed design of SPIDER ISEPS was finalised in 2011. Manufacture of most components was completed by end 2013 and the Factory Acceptance Tests (FAT) took place early 2014. ISEPS, with an overall power rating of 5 MVA, form a heterogeneous set of items, ranging from power transformers, medium voltage power distribution equipment at 6.6 kV to solid state power converters and including 1 MHz radiofrequency generators of 200 kW output power. Both high voltage, down to -12 kV and high current, up to 5kA, power supplies are present. SPIDER ISEPS will be installed in the NBTF SPIDER High Voltage (HV) Hall, on an air-insulated platform (-HV Deck?), at a nominal voltage to ground of -100kVdc. The limited space available within the HV Deck makes optimisation of the layout a critical aspect. The paper presents the main features of the detailed design developed by OCEM, focussing in particular on the high output voltage pulse step modulators, the high output current resonant converters, the radiofrequency generators by HIMMELWERK GmbH and the architecture and implementation of the complex control system coordinating the individual power supplies. Development and testing of prototypes for power conversion modules and control system customised electronics are also covered. Details are given on non-standard FAT verifying the insulation requirements specific to this application. Performance of ISEPS during the FAT is described and commented against the specifications, with emphasis on demonstration of the load protection requirements, a crucial point for all NB power supplies. Finally, key dates of SPIDER ISEPS installation and site testing schedule are provided.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
