基于多导体传输线理论的配电网电力电缆载波模型降阶分析  

Reduced-order Analysis of Power Cable Carrier Model in Distribution Network Based on Multi-conductor Transmission Line Theory

作　　者：李永亮 范学军 宋敬良 尹利杰 王艳[3] LI Yongliang;FAN Xuejun;SONG Jingliang;YIN Lijie;WANG Yan(State Grid Handan Power Supply Company,Handan 056004,China;Hebei Smart Grid Power Distribution Operation and Maintenance Technology Innovation Center,Handan 056004,China;School of Electrical and Electronic Engineering,North China Electric Power University,Baoding 071003,China)

机构地区：[1]国网河北省电力有限公司邯郸供电分公司,河北邯郸056004 [2]河北省智能电网配用电运维技术创新中心,河北邯郸056004 [3]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《河北电力技术》2024年第5期43-47,共5页Hebei Electric Power

摘　　要：为降低配电网电力电缆载波模型复杂程度,首先,根据配电网常用三芯XLPE绝缘电力电缆结构,结合电力电缆三相金属护套相互接触的实际,以三相金属护套为整体进行分析,将电力电缆7阶多导体传输线载波模型降为5阶。接着,根据配电网终端电力电缆金属护套、铠装直连接地的特点,将其进行等效处理,并分析了等效单位长度参数矩阵各元素与实际参数的关系,再次将配电网电力电缆5阶载波模型降为4阶。仿真试验验证了降阶分析的正确性,电力电缆载波模型的两次降阶,显著降低载波模型复杂程度,降低运算量提升分析速度,为载波通信在电力电缆传输中的进一步分析提供参考。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,according to the characteristics of the power cable sheath and the armor directly connected ground of the distribution network terminal,the sheath and armor of the power cable directly connected to the ground were equivalent treated,and the relationship between 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 correctness of the reduced-order analysis.Through the two downgrades of the power cable carrier model,the complexity of the carrier 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 

分 类 号：TM721[电气工程—电力系统及自动化]