This paper shows a laboratory implementation of a new on line monitoring method for detection of synchronous generator (SG) rotor eccentricities (REs). A 17kVA 4-pole wound-rotor salient-pole SG with reconfigurable stator poles and a regulated mechanical flange has been instrumented with Hall sensors, data acquisition board (DAB), and a LabView virtual instrument (VI) for RE detection through internal current space vector analysis (ICSVA). The ICSVA has been theoretically described in a companion paper; test-bed and experimental performances are described here. REs make rise loop currents in the SG's stator with parallel connections. Pole currents are transformed through a Fortescue's matrix, and 2(p±1) pole current space vectors are used for RE detection in 2p-pole SGs. The analytical signals were elaborated by direct detection of maximum and minimum amplitude of cardioid trajectories, and in alternative, by FFT. Both the methods were tested and discussed. A commissioning procedure for practical method set-up is also presented. © 2011 IEEE.
A virtual instrument for on-line evaluation of alternator's shaft misalignments through ICSVA (Internal Current Space-Vector Analysis) / Bruzzese, Claudio. - (2011), pp. 55-62. (Intervento presentato al convegno 8th IEEE Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2011 tenutosi a Bologna nel 5 September 2011 through 8 September 2011) [10.1109/demped.2011.6063602].
A virtual instrument for on-line evaluation of alternator's shaft misalignments through ICSVA (Internal Current Space-Vector Analysis)
BRUZZESE, claudio
2011
Abstract
This paper shows a laboratory implementation of a new on line monitoring method for detection of synchronous generator (SG) rotor eccentricities (REs). A 17kVA 4-pole wound-rotor salient-pole SG with reconfigurable stator poles and a regulated mechanical flange has been instrumented with Hall sensors, data acquisition board (DAB), and a LabView virtual instrument (VI) for RE detection through internal current space vector analysis (ICSVA). The ICSVA has been theoretically described in a companion paper; test-bed and experimental performances are described here. REs make rise loop currents in the SG's stator with parallel connections. Pole currents are transformed through a Fortescue's matrix, and 2(p±1) pole current space vectors are used for RE detection in 2p-pole SGs. The analytical signals were elaborated by direct detection of maximum and minimum amplitude of cardioid trajectories, and in alternative, by FFT. Both the methods were tested and discussed. A commissioning procedure for practical method set-up is also presented. © 2011 IEEE.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
