In order to reduce the complexity of the carrier model of power cables in distribution networks,firstly,according to the structure of three-core XLPE insulated power cables commonly used in distribution networks and the reality of the three-phase sheath of power cables in contact with each other,the three-phase sheath was analyzed as a whole.The carrier model of the power cable was reduced from the 7th-order multi-conductor transmission line carrier model to the 5th-order.Then,accord-ing to the characteristics of the power cable sheath and the armor directly connected ground of the distribution network termi-nal,the sheath and armor of the power cable directly connected to the ground were equivalent treated,and the relationship be-tween the elements of the equivalent unit length parameter matrix and the actual parameters was analyzed.The 5th-order carrier model of the power cable of the distribution network is reduced to the 4th-order again.The simulation results verified the cor-rectness of the reduced-order analysis.Through the two downgrades of the power cable carrier model,the complexity of the car-rier model is significantly reduced,and the amount of computation is reduced to improve the analysis speed,which provides a reference for the further analysis of carrier communication transmission in power cables.
关键词
电力电缆/载波模型/多导体传输线/衰减特性/降阶分析
Key words
power cables/carrier model/multi-conductor transmission lines/attenuation characteristics/reduced-order analysis
维普
万方数据