工频电场遥测系统传感器的分析与研究

Sensor Design of Power Frequency Electric Field Telemetry System

在工频电场遥测系统中,传感器是接收电场信号的关键,针对测量对象为低压线缆,对遥测系统中常用的一种传感器——平行板电容器进行了分析与研究。运用分布电容理论进行了原理分析,另外运用COMSOL仿真软件对平行板电容器在测量低压线缆时周围的电场分布情况进行了电磁场仿真,最终得到了平行板电容器在进行电场测量时的工作原理和一般规律,为遥测预警装置传感器部分的设计在理论上做了准备。

In the power frequency electric field telemetry system,the sensor is the key to receive the electric field signal.The paper analyzes and studies the parallel object capacitors of the measuring object—low voltage cable and a kind of sensor commonly used in telemetry system.The paper uses the theory of distributed capacitance to carry out the principle analysis.In addition,the COMSOL simulation software is used to simulate the electric field distribution of the parallel plate capacitors when measuring the low-voltage cable.Finally the working principle and generality of the parallel plate capacitors in the electric field measurement are obtained.The law is theoretically prepared for the design of the sensor part of the telemetry early warning device.