通过变压器电容式套管末屏获取过电压信号的方法

电网过电压是影响电网安全的重要因素。对电网过电压进行在线监测，实时获取电网过电压波形及其特征参数，对分析电网事故原因、改进电网绝缘配舍等方面具有十分重要的指导作用。现有的过电压在线监测系统多采用高压分压器来获取电压信号，但是，由于高压分压器自身特性，限制了其在更高电压等级电网下的应用。针对这一问题，提出了一种利用安装在变压器电容式套管末屏的特制电压传感器组成套管分压系统，从电容式套管的末屏抽头处获取电压信号的过电压在线监测实现方案。

Method to Obtaining Overvoltage Signal via Condenser Bushing Tap of Transformer

Overvoltage is a critical factor influencing the security of power grid.It is necessary to carry out online monitoring of overvoltage in power grid and obtain the waveform and characteristic parameters of overvoltage,which is very helpful in analyzing the power grid accident and improving the insulation cooperation.Most of the existing overvoltage monitoring systems adopt the divider to obtain signal.But for the reasons of the deficiencies of the divider,its application under higher voltage grade is limited...