NDLI: Calculation of thermal capacity of underground cables in multicircuit systems

Content Provider	IEEE Xplore Digital Library
Author	Leston, E. Da Silva, E. Hernandez, A.E. Ramirez, J. Bermudez, J. Perez G., L.
Copyright Year	1995
Description	Author affiliation: Dept. de Convercion y Transporte de Energia, Simon Bolivar Univ., Caracas, Venezuela (Leston, E.; Da Silva, E.; Hernandez, A.E.; Ramirez, J.; Bermudez, J.; Perez G., L.)
Abstract	An alternative for the calculation of thermal capacity of underground multicircuit transmission systems is proposed in this paper. The method used for this purpose is based on the calculation of the temperature developed in each component of the cable in the multicircuit system during a certain period of time. The load cycle associated to the cable system is known during this period of time. This method also takes into account the thermal transients suffered by power cables stressed to variable load cycles. The calculation of the temperature is done by means of thermal equivalent models of the phenomenon. In these models, different thermal parameters of the cables and trenches, thermal sources of each cable, and the effect between cables of the same circuit and cables of adjacent circuits located on the same trench are considered. The method mentioned considers the solving of numerical integration of differential equations associated to the thermal circuits and the multiconductor electric circuit, in order to determine the loses due to circular currents. In this manner, it is possible to include different types of cable (e.g. single-pole and three-pole cables. Pipe-Type cables, etc.) and grounding settings metallic shields and armors. The application of the method in a real life case is also exposed; the potential of the developed tool is also demonstrated.
Starting Page	358
Ending Page	362
File Size	409043
Page Count	5
File Format	PDF
ISBN	0780326725
DOI	10.1109/ICCDCS.1995.499177
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-12-12
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Temperature Thermal loading Thermal factors Thermal resistance Power cables Power system modeling Reactive power Circuit simulation Underground power cables Thermal stresses
Content Type	Text
Resource Type	Article

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