电力电缆电容锥式终端结构及电场分析  

Structure and Electric Field Analysis of Power Cable Capacitive Cone Terminal

作　　者：郑钟楠 黄友聪 方超颖 王晓杰 许军 ZHENG Zhongnan;HUANG Youcong;FANG Chaoying;WANG Xiaojie;XU Jun(State Grid Fujian Electric Power Research Institute,Fuzhou 350000,China)

机构地区：[1]国网福建省电力有限公司电力科学研究院,福建福州350000

出　　处：《电工技术》2021年第3期102-105,共4页Electric Engineering

摘　　要：电容锥式电缆终端是在增绕绝缘的基础上增绕时中间夹入导电铝箔形成多层电容串联的结构以起到均匀电缆终端电场分布的作用。为了研究故障时电力电缆电容锥式终端结构对电场分布的影响,采用了有限元法及基于电磁暂态法的软件ATP-EMTP对高压电缆电容锥式电缆终端发热缺陷进行分析。通过对故障电缆的解剖分析、仿真及两种仿真方法的对比,研究了电容锥式终端的结构及正常运行与故障时的电场分布,得出铝箔破碎是造成电容锥式电缆终端发热的主要原因。The capacitance cone type cable terminal is based on the additional winding insulation,and the conductive aluminum foil is sandwiched in the middle to form a multi-layer capacitor series structure,which plays the role of uniform electric field distribution of cable terminal.In order to study the influence of the power cable capacitor cone terminal structure on the electric field distribution during a fault,the finite element method and the software ATP-EMTP based on the electromagnetic transient method were used to analyze the heating defects of the high voltage cable capacitor cone cable terminal.Through the anatomical analysis of the faulty cable,the simulation results and the comparison of the two simulation methods,the structure of the capacitor cone terminal and the electric field distribution during normal operation and failure were studied.It was concluded that the broken aluminum foil was the main reason for the heating of the capacitor cone cable terminal.

关 键 词：电缆终端 红外测温 电场分布 有限元法 ATP-EMTP 

分 类 号：TM62[电气工程—电力系统及自动化]