大型电力变压器局部放电在线监测系统的研制

Development of Online System Monitoring Partial Discharge Occurred in Huge Transformer

阐述了变压器局部放电监测的重要性,介绍了大型电力变压器局部放电在线监测系统的系统组成及各组成部分的功能,提出了模拟信号预处理电路结构的设计方案,分别说明了固定增益放大电路、程控增益放大电路、微调放大电路、滤波电路的电路设计方法,并简单介绍了以ARM为核心的现场监测单元的组成。

It is important to monitor the partial discharge occurred in transformer.In this paper,an online system monitoring the partial discharge occurred in huge transformer is presented.The functions of each parts of the system are described,the designing scheme of the circuit preprocessing analog signals is proposed,the amplifying circuit with a fixed ratio of output to input,the amplifying circuit with a program-controlled ratio of output to input,a mini-modulating amplifying circuit and a filter circuit are given.A brief introduction to the composition of on-site monitoring unit is based on ARM core.