变压器局部放电在线监测装置技术研究

Research of Transformer Partial Discharge On-line Monitoring Device Technology

利用新兴的超高频法(UHF)对变压器的局部放电进行研究,有效避免了传统的脉冲电流法频率低、频带窄的缺点,能够对局部放电进行全面的反映。文章研究了适合于变压器现场检测的局部放电传感器,得到低频信号调理单元和高频宽带信号前置放大单元,以及相应的数据采集单元和装置干扰抑制的基本原理。

UHF method developed in recent years, the transformer partial discharge are studied by using uhf method, to overcome the traditional pulse current method of measuring frequency is low, the disadvantage of narrow frequency band, it can be more comprehensive research intrinsic characteristics of partial discharge. This paper studies the transformer partial discharge sensor which is suitable for online monitoring site,the low fre-quency partial discharge signal disposal unit and high frequency broadband partial discharge signals preamplifier unit, and the corresponding data acquisition unit and the basic principle of interference suppression device.