With the development of modern industry and the improvement of the level of urbanization, more and more attention has been paid to power cable as an important tool for transmitting electric energy.The reliability of its operation has a direct impact on the normal operation of power system.The insulation structure of the power cable is often due to the difficulty of processing technology and raw materials and impure air gap exists and harmful impurities,or because of technical reasons, there is a gap between the insulation and the semi conductive shielding layer or the semi conductive body to the insulating layer,it is easy to produce partial discharge in the air gap and impurity tip.In this paper, starting from power cable,the simulation model is established by using Ansys, and the magnetic properties of single core power cable are analyzed,in order to lay the foundation for the detection of partial discharge in power cable by means of magnetic field measurement.%随着现代工业的发展和城市化水平的提高,电力电缆作为传输电能的重要工具,越来越多得到人们的重视,其运行的可靠性直接影响电力系统的正常运行.电力电缆的绝缘结构中往往会由于加工技术上的难度或原材料不纯而存在气隙和有害杂质,或者由于工艺原因在绝缘与半导电屏蔽层之间存在间隙或半导电体向绝缘层突出,在这些气隙和杂质尖端处极易产生局部放电.文中从电力电缆放电机理出发,利用Ansys建立仿真模型,分析了单芯通电电缆磁场特性,为采用磁场测量的方法检测电力电缆局部放电奠定基础.
展开▼
