配网10 kV旁路柔性电缆护层感应电压与电流的分析  

Analysis of Induced Voltage and Current of 10 kV Bypass Flexible Cable Sheath in Distribution Network

作　　者：马金超 何文峰 徐小康 管子然 MA Jinchao;HE Wenfeng;XU Xiaokang;GUAN Ziran(Guangdong Lisheng Electric Power Technology Corporation,Guangdong Foshan 528000,China;School of Electrical and New Energy,China Three Gorges University,Hubei Yichang 443002,China)

机构地区：[1]广东立胜电力技术有限公司,广东佛山528000 [2]三峡大学电气与新能源学院,湖北宜昌443002

出　　处：《电工材料》2022年第4期10-14,19,共6页Electrical Engineering Materials

基　　金：国家自然科学基金(51807110)。

摘　　要：为解决配网不停电作业用柔性电缆绝缘问题,利用PSCAD建立旁路电缆系统模型,研究了旁路电缆布置方式、长度、分段长度、载流量、接地方式等因素对旁路电缆护层感应电压与电流的影响。结果表明:旁路电缆垂直布置时,三相电缆护层感应分量最小,相间差值约为0;旁路电缆长度每增加100 m,电缆护层感应电流亦增加0.5 A左右,而旁路电缆分段长度对电缆护层感应分量影响可忽略不计;电缆导体载流量与电缆接地故障对护层感应电压有显著的影响;交叉互联可降低电缆护层分量至接近于0。To solve the problem of flexible cable insulation for distribution network operation without power cut,this paper establishes a bypass cable system model by the PSCAD,and studies the influence of bypass cable layout,length,section length,ampacity,grounding mode and other factors on the induced voltage and current of bypass cable sheath.The simulation results show that:when the bypass cable is arranged vertically,the induced component of the three-phase cable sheath is the smallest,and the induced voltage and current difference between phases is almost 0;when the bypass cable length increases by 100 m,the cable sheath induced current also increases by about 0.5 A,and the influence of the bypass cable section length on the cable sheath induction component can be ignored;the cable conductor current carrying capacity and cable grounding fault have a significant impact on the sheath induced voltage;cross interconnection can reduce the power consumption The cable sheath component is close to 0.

关 键 词：配网 10 kV 旁路电缆 PSCAD 检修 护层 多因素 

分 类 号：TM726[电气工程—电力系统及自动化]