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RESEARCH PRODUCT

Detecting Eccentricity and Demagnetization Fault of Permanent Magnet Synchronous Generators in Transient State

Huynh Van KhangKjell G. RobbersmyrSveinung Attestog

subject

PhysicsTransient stateStatorbusiness.industryRotor (electric)media_common.quotation_subjectStructural engineeringVDP::Matematikk og Naturvitenskap: 400Fault (power engineering)Fault detection and isolationlaw.inventionSearch coillawTransient (oscillation)Eccentricity (behavior)businessmedia_common

description

Eccentricity and demagnetization fault of a four-pole 1.5 kW surface mounted permanent-magnet synchronous-generator (PMSG) were modelled by using time-discretised finite element analysis (FEA). Both fault types are caused by magnetic asymmetry in the generator. The faulty behaviour of a PMSG under transient operating condition is studied with FEA. Two search coils were wound around stator teeth on opposite sides of the rotor. The induced voltage from these coils will be equal in healthy case. A fault is detected when the induced voltages are non-identical. The simulation results revealed that the envelope of the induced search coil voltage had sinusoids during dynamic eccentricity and demagnetization. Finally, a novel fault scheme is proposed to detect the mentioned faults during transient state.

yearjournalcountryeditionlanguage
2019-08-01
10.1109/icems.2019.8921753https://hdl.handle.net/11250/3028218