10kV XLPE电缆冷缩中间接头界面压力计算分析  

Analysis of the Interface Pressure of Cold Shrinkable Joint of 10 kV XLPE Cable

作　　者：贾志东[1,2] 张雨津 范伟男 朱斌[1,2] 游蛟 陆国俊 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084 [2]清华大学深圳研究生院,深圳518055 [3]广州供电局有限公司,广州510620

出　　处：《高电压技术》2017年第2期661-665,共5页High Voltage Engineering

基　　金：南方电网公司重点项目(K-GZM2014-030)~~

摘　　要：近年来,冷缩中间接头广泛用于10 kV交联聚乙烯电缆线路中。界面压力是冷缩中间接头的重要性能参数,然而国际、国内标准缺少对界面压力测量方法的指导以及对界面压力数值范围的限定,一定程度上影响了冷缩中间接头的质量控制与性能检测。因此建立了界面结构的理论计算模型,推导了界面压力的理论计算公式,并以不同厂家不同尺寸的冷缩管为试品,使用预埋传感器的方式直接测得了实际的界面压力。试验结果表明:界面压力在接头安装后呈增大趋势并在数小时后趋于稳定值,试验数据与理论计算值的相对误差较小,验证了理论计算模型的合理性以及理论计算公式的有效性。研究结果能够为配网电缆中间接头的入网质量检测提供参考,从而提高配网电缆线路的可靠性。In recent years, cold shrinkable joints are widely used in 10 kV XLPE cable line. Interface pressure is an essential parameter which determines the performance of cold shrinkable joints. However, relevant contents of interface pressure are barely seen in both international and national standards, which makes it harder for quality control and performance test of cold shrinkable joints. For this reason, the theoretical calculation model of the cable joint is proposed and the calculation formula of the interface pressure is deduced. The test of measuring the interface pressure is applied using cold shrinkable tubes in different sizes from different manufacturers as samples and embedded sensors as test method. The test results indicate that the interface pressure will ascend to stable value after installation of the joint. Minor relative errors between test results and theoretical calculation verify the validity of the theoretical model and interface pressure calculation formula. In this way, the research results can provide references to future quality test before new cable joints are put into operation and therefore improve the reliability of cable lines in distribution network.

关 键 词：交联聚乙烯 电缆 冷缩中间接头 界面 压力 

分 类 号：TM75[电气工程—电力系统及自动化]