Abstract:

In power distribution, medium voltage cables are preferred for both reducing the probability of failure and for safety reasons. However, it becomes necessary to install many cable systems in parallel in the same gallery, especially in regions which the energy demand increase. In this study, a case study in which the power cables installed from the main step-down output of a transformer substation to the distribution center are connected via the coupling bus is examined. In this context, first of all, the cable system was modeled and analyzed, and the model was verified with the field measurement data. Then, depending on the various parameters, the currents passing through the coupling busbar and the variation of the current distributions on the cables were examined. The results show that all these parameters have significant effects on the currents in the cables and the coupling. This proves the necessity of considering the changes in the operating conditions that may be encountered during the installation of the cable systems in order to ensure the continuity of the energy supply and the system reliability in the cable systems with parallel circuits.

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