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Inductive Coupling between Wires in Cables with a Grounded Conductor

机译:带接地导体的电缆中导线之间的电感耦合

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The arrangement of conductors in a multi-core power cable leads to a situation where various conductor loops are built up. One or several loops are formed by the phase and neutral conductors with the operational current flowing in these conductors. A further loop is built up by the protective earth conductor which is connected to the equipotential bonding system at several locations. The area of this loop is essentially arranged outside of the power cable. The inductive coupling from the phase conductor loops into that loop causes common mode voltages in the protective earth system with consequent common mode currents. It can be demonstrated that this effect takes place even in case of balanced phase currents in the cable. Numerical simulations and parameter studies were carried out in order to describe this effect quantitatively and to investigate the influence of different cable parameters onto the resulting common mode voltages.
机译:多芯电力电缆中导体的布置会导致形成各种导体回路的情况。相线和中线导体形成一个或几个环路,工作电流在这些导体中流动。保护性接地导体建立了另一个环路,该导体在多个位置连接到等电位联结系统。该回路的区域基本上布置在电源线的外部。从相导体回路到该回路的电感耦合会在保护接地系统中产生共模电压,并随之产生共模电流。可以证明,即使电缆中的相电流平衡,也会产生这种影响。进行了数值模拟和参数研究,以定量描述这种影响,并研究不同电缆参数对所得共模电压的影响。

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