XLPE电缆绕组芯线与外半导电层间的暂态耦合特性

Transient Coupling Characteristics between Core and Outer Semiconducting Layer of XLPE Cable Windings

为了解XLPE电缆外半导电层与芯线的暂态电压耦合特性,测取了冲击电压下外半导电层及芯线的电压分布;给出了单匝电缆的等效电路模型。结果表明,冲击电压下芯线与外半导电层间为电容耦合。试验和计算结果吻合。

In this paper, the transient voltage distributions of core and outer semiconduting layer are measured, a circuit model of a circle of cable is described. The computed result perfectly agrees with measured one, which indicates that the capacity coupling exists between core and outer semiconducting layer under impulse voltage. A theoretical basis is provided for the design, protection and experimentation for the new type of electric equipment.