Zero-Sequence Current in Cable Systems: A Study

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