NDLI: A generalized approach for the study of the non linear behaviour of stator winding insulation

Content Provider	IEEE Xplore Digital Library
Author	Pinto, C.
Copyright Year	1998
Description	Author affiliation: ABB Lenzohm Service Ltd., Mumbai, India (Pinto, C.)
Abstract	Measurements performed on stator winding insulation indicate variations in capacitance and tan /spl delta/ values with voltage even in the absence of partial discharge activity. One of the most obvious reasons for this variation is the presence of the non-linear field stress grading system employed at the slot ends. Other reasons include interfacial and space charge polarization phenomena, due to a variety of reasons including contamination of the windings, as well as, the effects of electrostatic forces on delaminated stator insulation. As partial discharge activity results in change in the instantaneous capacitance with voltage, it could also be considered as a case of non linear behaviour of the insulation. The paper discusses a generalized approach to study the influence of non-linear behaviour on the variations of capacitance and losses. Case studies are employed to illustrate the usefulness of measurements on the stator windings in service.
Starting Page	528
Ending Page	532
File Size	482564
Page Count	5
File Format	PDF
ISBN	0780342372
DOI	10.1109/ICSD.1998.709340
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-06-22
Publisher Place	Sweden
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Stator windings Insulation Pollution measurement Voltage Partial discharges Capacitance measurement Partial discharge measurement Performance evaluation Stress Space charge
Content Type	Text
Resource Type	Article

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