摘要
电力电缆因绝缘性能优异、安装方便、不占用地面空间、供电可靠性高等优点,在城市电网中得到广泛应用,且在整个电力系统传输线中所占的比例逐年提高。针对传统离线检测方法及便携式局部放电检测设备的局限性,介绍了分布式局部放电检测技术在高压电缆线路交接试验及在线重症监护中的应用,为长距离新敷设电缆和疑似问题电缆的故障检测及绝缘性能评估提出了解决方案。分布式局部放电监测系统采用无线组网技术,可完成15 km高压电缆线路交接试验及疑似问题电缆的重症监护,且具备危险度评估及绝缘缺陷类型识别功能。
Power cables are widely used in urban power grids due to their excellent insulation performance,easy installation,no floor space,and high power supply reliability,and their proportion in the entire power system transmission line is increasing year by year.In view of the limitations of traditional off-line detection methods and portable partial discharge detection equipment,the application of distributed partial discharge detection technology in high-voltage cable line handover test and on-line intensive care unit was introduced.Solutions were proposed for fault detection and insulation performance evaluation of long-distance newly laid cables and suspected cables.The distributed partial discharge monitoring system adopted wireless networking technology,which could complete 15 km high-voltage cable line handover test and intensive care of suspected cable,and had the function of risk assessment and insulation defect type identification.
作者
李晨
于强
王林峰
陈先凯
沈佳华
王国明
LI Chen;YU Qiang;WANG Linfeng;CHEN Xiankai;SHEN Jiahua;WANG Guoming(State Grid Qingdao Power Supply Company,Qingdao 266002,China;Hangzhou Guozhou Power Technology Co.,Ltd.,Hangzhou 310015,China)
出处
《电工技术》
2021年第3期84-86,共3页
Electric Engineering
关键词
电缆
分布式局部放电检测
绝缘
在线监测
无线组网
power cable
distributed partial discharge monitoring
insulation
on-line diagnosis
wireless networking
