【作者】 孙静；

【导师】 赵子玉；

【作者基本信息】 上海交通大学 ， 电气工程， 2012， 硕士

【摘要】 随着城市电网用电负荷的不断增涨,电力电缆的故障概率也大大增加,开展电力电缆局部放电在线监测研究对电力系统的安全稳定运行具有重要意义。近几年电力电缆在电力系统中得到了广泛的应用,对电缆绝缘的检测也成了研究的一个热点,而由于局部放电信号与电缆绝缘老化的关系密切,可以通过检测局部放电来完成电缆的检测。本文首先综述了国内外现有的高压电力电缆局部放电在线检测方法,接着阐述了局部放电的机理,分析了局部放电在XLPE电缆中的传播特性,然后介绍了本文研制的电缆局部放电在线测量的电磁耦合高频电流传感器,最后介绍了本文研制的抗干扰和局部放电定位功能的电缆局部放电脉冲方向耦合器。更多还原

【Abstract】 With the increasing development of power system, the rapid increase in electricity load and the continuous growth of transmission lines, the online-monitoring and diagnosis of power cable is more and more important for the entire power system to run safely and stable. In recent years,power cables has been widely used in the power system.The insulation detection has become a hot topic.As PD signals is closely related with the aging of cable insultion, the testing of cable can be achieved by analysising the PD signal.This paper firstly reviews the existing high-voltage power cable PD detection methods domestic and abroad,and then elaborated on the mechanism of partial discharge in XLPE cables and its propagation characteristics.This paper focouses on the development of the electromagnetic coupling high-frequency current sensors and the design of directional coupler,which is capable of PD positioning and anti-interference.更多还原