摘要
针对GIS同轴结构中局部放电脉冲所激发电磁波的宽频带特征,设计出一种新型局部放电超高频检测非频变超宽带天线,用无限巴伦实现天线和传输线之间的阻抗匹配.由超宽带天线、宽带放大器、数字存储示波器和计算机组成外部传感器超高频局部放电检测系统,利用该系统对所建立的GIS固定微粒局部放电模型进行检测,并对局部放电源进行定位.实验结果表明,设计的天线满足GIS局部放电超高频检测要求,建立的系统可以方便地实现GIS局部放电检测和局部放电源的定位.
Aiming at the broadband feature of electromagnetic wave of partial discharge (PD) pulse excited in gas-insulated metal-enclosed switchgear (GIS), a new type ultra high frequency (UHF) PD detection frequency independent ultra wide band antenna was designed, which realized impedance-match between antenna and signal transmission line by infinite balun. An external sensors (antenna) UHF detection system of PD consisted of antenna, wide band amplifier, digital stored oscillograph and computer is used to detect and locate the partial discharge of fixed protrusion of GIS. The experimental results show that this type antenna can meet the need of PD UHF measure, and the system can detect and locate conveniently PD in GIS.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2003年第12期1280-1283,共4页
Journal of Xi'an Jiaotong University
关键词
局部放电
超高频
检测
气体绝缘的金属封闭式组合电器
Antennas
Electromagnetic waves
High frequency amplifiers
Oscillographs
Partial discharges
Sensors
Technology
