Modelling and experimental validation of internal short-circuit fault in salient-pole synchronous machines using numerical gap function including stator and rotor core saturation

In this study, the winding function method is modified and used to calculate the machine inductances in two different cases, namely, a healthy case and a short-circuited stator winding case. For the first time, a numerical air-gap function is used in addition to a model of the air gap of salient-pol...

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Bibliographic Details
Published in:IET electric power applications 2013-05, Vol.7 (5), p.391-399
Main Authors: Hemmati, Siroos, Shokri Kojoori, Shokrollah, Saied, Seyedamin, Lipo, Thomas A
Format: Article
Language:English
Subjects:
air gap model
Applied sciences
Electrical engineering. Electrical power engineering
Electrical machines
Exact sciences and technology
experimental validation
fault diagnosis
Faults
faulty conditions
healthy case
healthy conditions
inductance
internal short‐circuit fault
machine inductance
machine insulation
Mathematical analysis
mathematical model
Mathematical models
Miscellaneous
modelling validation
modified winding function method
MWF method
numerical air‐gap function
numerical gap function
rotor core saturation
Rotors
salient‐pole machines
salient‐pole synchronous machines
Saturation
short‐circuit currents
short‐circuited stator winding
stator core saturation
stator slot effects
Stators
synchronous machines
Winding
winding function method
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Summary:In this study, the winding function method is modified and used to calculate the machine inductances in two different cases, namely, a healthy case and a short-circuited stator winding case. For the first time, a numerical air-gap function is used in addition to a model of the air gap of salient-pole machines which considers the stator slot effects. The modified winding function (MWF) method introduced here is more precise when compared with previous methods. This MWF enables one to compute the air-gap function more accurately. Also a mathematical model that allows taking stator and rotor core saturation into account in both healthy and faulty conditions is presented in this study. Stator and rotor winding currents in healthy and faulty condition, obtained from experimental results, are compared with simulation results to verify the accuracy of the proposed method.
ISSN:1751-8660
1751-8679
1751-8679
DOI:10.1049/iet-epa.2012.0342