Abstract
The optimum position of parallel underground cables will be calculated numerically. The criterion is how much joule losses should be dissipated in each cable so that the temperature increases of all cables are equal. A simple analytical formula is also given. DOI: http://dx.doi.org/10.5755/j01.eee.20.5.7097
Highlights
Underground power cables are thermally well insulated
One can ask the question in which order one has to put the cables so that the temperature distribution is optimal, i.e. the maximum temperature should be as low as possible
It can be proved that this problem is equivalent to the following one: how to interchange the position of the cables so that the temperature distribution is as uniform as possible
Summary
Underground power cables are thermally well insulated. At a depth of about 1 m the amount of ground surrounding the cable is quite huge so that it behaves as a high thermal resistance. Several papers have treated the thermal problems of underground cables [1]–[17]. One can ask the question in which order one has to put the cables so that the temperature distribution is optimal, i.e. the maximum temperature should be as low as possible. It can be proved that this problem is equivalent to the following one: how to interchange the position of the cables so that the temperature distribution is as uniform as possible. A uniform temperature distribution is the optimal situation
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