混合排列方式在交叉互联电缆中的应用  

The Application of Mixed Arrangement in Sheath Cross Bonding System

作　　者：梁海生[1] 李帆[1] 王永志[2] 曹炜[2] 

机构地区：[1]国网上海市电力公司经济技术研究院,上海200002 [2]上海电力学院,上海200090

出　　处：《电线电缆》2015年第6期41-44,共4页Wire & Cable

摘　　要：城市电网改造引起电缆线路割接,造成原有交叉互联接地方式被打破,这将导致金属护套中产生环流。从分析金属护套环流产生原理入手,找出影响金属护套感应电压的主要因素,通过相量图分析交叉互联电缆金属护套感应电压相量,提出混合排列方式在某些场合可以降低金属护套环流。同时,通过EMTP仿真验证了结论的正确性,并明确了混合排列方式的应用范围。Cable sheath cross-bonding system will be broken, when the cables are cut, due to urban power grid chan- ging. Which cause induced current in the metal sheath. First the article analysis the induced voltage theory, and know the main factors which cause sheath current. Meanwhile, use phase diagram describe induced voltage vectors. The analysis of phase diagram provides the method that when the three sections are unequal, using different arrange- ment can reduce metal sheath current caused by unequal of three sections. Then we confirm the correctness of the conclusion and definite the limit of application by EMTP simulation.

关 键 词：高压电缆 金属护套 排列方式 护套环流 

分 类 号：TM247.1[一般工业技术—材料科学与工程]