摘要
为了提高电力变压器局部放电信号的特高频在线监测效果,设计制作了特高频采集天线、放大电路、检波电路和采集系统软件。采用了HFSS软件设计优化特高频传感器的天线,实现了变压器局部放电特高频频段的有效采集;采用了Altium Designer软件设计特高频传感器的分离放大和检波电路,提高对信号检测的灵敏度和抗干扰能力等,并制作了电路模块。将天线于信号处理模块结合,形成了完整的特高频在线监测传感器;采用了labview软件编译检测所需的采集程序,具备信号采集、阈值设定和报警、历史数据查看和导出等功能;研究了特高频信号采集装置与基于labview编译检测所需的采集程序结合的方法,形成了完整的特高频局放监测系统。研究结果表明:监测系统能够完成天线采集、信号放大、检波和输入采集系统等功能。
In order to improve the local high-frequency on-line monitoring effect of the partial discharge signal of the power transformer,the special high frequency acquisition antenna,the amplification circuit,the detection circuit and the acquisition system software were designed and manufactured. The HFSS software was used to optimize the antenna of the UHF sensor,which can realize the effective collection of the UHF band of the partial discharge of the transformer. In order to improve the sensitivity and anti-jamming capability of signal detection,Altium Designer software was used to design the separation and amplification circuit of UHF sensor and make circuit module. In order to form a complete UHF on-line monitoring sensor,the antenna was combined with the signal processing module. Acquisition program was compiled by the labview software,which can achieve signal acquisition,threshold settings and alarm,historical data viewing and export functions. The method of combining the UHF signal acquisition device and the acquisition program were studied,which based on labview compilation detection to form a complete UHF PD system. The results indicate that the monitoring system can complete the function of antenna acquisition,signal amplification,detection and input acquisition system.
出处
《机电工程》
CAS
北大核心
2018年第2期191-195,共5页
Journal of Mechanical & Electrical Engineering
