Thermal effect on electric power network components under short-circuit currents

Polykrati, AD; Karagiannopoulos, CG; Bourkas, PD

dc.contributor.author	Polykrati, AD	en
dc.contributor.author	Karagiannopoulos, CG	en
dc.contributor.author	Bourkas, PD	en
dc.date.accessioned	2014-03-01T01:21:38Z
dc.date.available	2014-03-01T01:21:38Z
dc.date.issued	2004	en
dc.identifier.issn	0378-7796	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16285
dc.subject	IEC method	en
dc.subject	Short-circuit currents	en
dc.subject	Thermal effect	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.other	Electric power distribution	en
dc.subject.other	Electric switches	en
dc.subject.other	Equations of state	en
dc.subject.other	Estimation	en
dc.subject.other	Heat transfer	en
dc.subject.other	Mathematical models	en
dc.subject.other	Short circuit currents	en
dc.subject.other	Temperature measurement	en
dc.subject.other	Thermal effects	en
dc.subject.other	Automatic switches	en
dc.subject.other	Component mass	en
dc.subject.other	Electric power network components	en
dc.subject.other	IEC method	en
dc.subject.other	Electric circuit breakers	en
dc.title	Thermal effect on electric power network components under short-circuit currents	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.epsr.2004.04.010	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.epsr.2004.04.010	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	In this work a mathematical model is proposed regarding the temperature rise estimation in components installed to electric power distribution networks (e.g. circuit breakers, automatic switches, disconnectors, fuse carriers), during short-circuit faults. The overall short-circuit current waveform and the components' mass and material are considered. The model was applied to a common disconnector of the network and characteristics of the results are plotted according to different forms of the asymmetric part of the short-circuit current waveform and the initial value of the short-circuit d.c. current component. The models' response is also investigated for a wide range of values of the crossing resistance and the component mass. It is convincingly shown that the short-circuit current waveform asymmetric part and component mass significantly affect temperature rise, and calculations of temperature rise which omit the above factors are questionable. An easy to use approximating equation is proposed, which could be considered in the mathematical approach of the phenomenon, according to international standards and facilitate the above components design. (C) 2004 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE SA	en
heal.journalName	Electric Power Systems Research	en
dc.identifier.doi	10.1016/j.epsr.2004.04.010	en
dc.identifier.isi	ISI:000224659000007	en
dc.identifier.volume	72	en
dc.identifier.issue	3	en
dc.identifier.spage	261	en
dc.identifier.epage	267	en