This paper studies the reaction currents of a synchronous machine (SM) with general rotor eccentricity (RE) and parallel paths in the stator. REs make rise loop currents which can be translated in the complex domain through a Fortescue's space-transformation. Extensive simulations show that mainly 2(p±1)-pole current space vectors are stimulated by REs in 2p-pole SMs, with typical cardioid-shaped patterns. The simulation results were justified by using multi-phase symmetrical components, and theoretical formulas were obtained for fault severity assessment starting from loci amplitudes. Experimental verification was shown in a companion paper, where a Labview virtual instrument detects natural and artificial REs in a 17kVA four-pole generator. © 2011 IEEE.
Study of cardioid-shaped loop current space vector trajectories for rotor eccentricity detection in power synchronous machines / Bruzzese, Claudio. - (2011), pp. 205-212. (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.2011.6063625].
Study of cardioid-shaped loop current space vector trajectories for rotor eccentricity detection in power synchronous machines
BRUZZESE, claudio
2011
Abstract
This paper studies the reaction currents of a synchronous machine (SM) with general rotor eccentricity (RE) and parallel paths in the stator. REs make rise loop currents which can be translated in the complex domain through a Fortescue's space-transformation. Extensive simulations show that mainly 2(p±1)-pole current space vectors are stimulated by REs in 2p-pole SMs, with typical cardioid-shaped patterns. The simulation results were justified by using multi-phase symmetrical components, and theoretical formulas were obtained for fault severity assessment starting from loci amplitudes. Experimental verification was shown in a companion paper, where a Labview virtual instrument detects natural and artificial REs in a 17kVA four-pole generator. © 2011 IEEE.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
