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Behavior of synchronous machines subjected to voltage sags of type A, B and E
KTH, School of Electrical Engineering (EES), Electrical Machines and Power Electronics.
2005 (English)In: EPE Journal: European Power Electronics and Drives Journal, ISSN 0939-8368, Vol. 15, no 4, 35-42 p.Article in journal (Refereed) Published
Abstract [en]

Voltage sags and voltage interruptions are huge power quality problems for many industries. Voltage sags cause apart from eventual tripping, large torque peaks, which may cause damage to the shaft or equipment connected to the shaft. This paper illustrates how the stator flux in a synchronous machine changes during voltage sags. These changes result in torque peaks. An analytical time dependent expression of the stator flux during voltage sags explains the behaviour of synchronous machines and why there are high torque and current peaks during voltage sags. Simulations verify the expressions, and illustrate the dependence of torque and current peaks on voltage sag duration and magnitude.

Place, publisher, year, edition, pages
2005. Vol. 15, no 4, 35-42 p.
Keyword [en]
power quality, voltage sags, synchronous machine, simulations, modelling, peak torque
URN: urn:nbn:se:kth:diva-15314ISI: 000234724500007ScopusID: 2-s2.0-29344451887OAI: diva2:333355
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Sadarangani, Chandur
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