NDLI: Thermal Effect of the Recloser Operation Cycle on Bare Overhead Conductors

Content Provider	IEEE Xplore Digital Library
Author	Halevidis, C.D. Karagiannopoulos, C.G. Bourkas, P.D.
Copyright Year	1986
Abstract	A new calculation method of the temperature rise generated from multiple (consecutive) short circuits, to which bare overhead conductors are subjected, is proposed in this paper. Multiple short circuits are common in medium-voltage lines protected by reclosers due to their operation cycle. The proposed method treats each short circuit as a separate event. In additiony, the cooling between each short circuit is taken into account. The results of the proposed method are compared to the results given by the method of the IEC 60865-1 standard. The application of the proposed method results in greater temperature rises when the equivalent thermal current density is greater than a threshold. Furthermore, alterations to the recloser operation cycle are performed in order to investigate its effect on the generated temperature rise, namely, alterations to the reclosing interval between successive tripping operations and the ratio of fast to delayed trips. Finally, the proposed method was compared to an exact numerical solution of the heating process.
Sponsorship	IEEE Power Engineering Society
Starting Page	568
Ending Page	574
Page Count	7
File Size	607800
File Format	PDF
ISSN	08858977
Volume Number	27
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Conductors Heating Conductivity Circuit faults Copper Cooling Differential equations thermal effect Automatic circuit reclosers medium-voltage distribution systems multiple short circuits overhead bare conductors short-circuit current
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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