基于空间电场效应的高电压测量装置的研究

Research on high-voltage test equipment based on effect of space electric field

本文在对一种基于空间电场效应的电容分压器的电场进行计算分析的基础上,讨论了这种新型电容分压器的安装位置与高压探头对地分布电容间的关系,椭球形和圆球形高压探头的电场分布情况以及测量不同电压等级时高压探头球体的最小半径等问题,设计了电容分压器的结构及参数。作为该新型电容分压器的一种应用,设计了一套完整的高电压测量装置。试验表明,该装置具有较好的测量精度和响应特性,信号波形的再现能力较为理想,适用于电力系统中高压输电线路等设备的暂态高电压信号的现场试验测量。

on the basis of the calculation and analysis of electric field of a new type of capacitive divider based on the effect of space electric field, some problems are discussed in the paper such as the relation between the capacitive divider hanging site and the distribution capacity to ground, the distribution maps of the electric field for the elliptical and the orbicular high-voltage probe, the minimum radius of the capacitive divider under different voltage. The structure and parameter of the divider are designed. As the application of the capacitive divider, a high-voltage test equipment is made. The experiment results show the equipment has good characteristics such as measurement precision, frequency response and waveform fidelity and can apply to the site-test of high-voltage equipments in power system.