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Corresponding Author

Shimaa A. F. Salem

Subject Area

Electrical Engineering

Article Type

Original Study

Abstract

Large zero-sequence current is not a new phenomenon for cable bus duct systems; the question is what influences its magnitude. It was found that the zero-sequence currents were circulating between different circuits in the cable system and that they were being generated by induction between phases in the same cable route. It was determined that the zero-sequence currents could be greatly reduced in a twin circuit by symmetrical configuration of the cables. However, in a four-circuit system, no significant reduction could be achieved even by the symmetrical configuration. Therefore, in this paper, this phenomenon will be analyzed and discussed. ATPDraw is used to simulate and analysis this kind of study. Also, the effect of sheath cross bonding is explained and analyzed. It is found that the currents are changed dramatically according to the arrangement of each cable. When reducing zero-sequence currents, various layouts are examined in light of their underlying physical causes. Also, It is determined that the zero-sequence current is hardly affected by any unbalanced crossbondig

Keywords

Cables Arrangement, Current Distribution, Zero-Sequence Currents, Sheath Cross Bonding

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

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