电流比较仪式电桥的自动平衡算法

Research on Automatic Balancing Algorithm of Current Comparator Bridge

本文介绍了测量高压电气设备电容值和介质损耗角正切tanδ的电流比较仪式电桥。对传统的电阻调节式电流电桥进行改进,加入了增益可调单元,在仿真分析的基础上研究出电桥自动平衡的原理和算法,实现对电容、tanδ高精度全自动的测量。

This paper introduces the measurement of capacitance and dielectric loss factor(tanδ) with an automatic current comparator bridge.The traditional resistance adjustable current bridge was improved by adding gain units which were controlled by the microcomputer.And based on simulation we developed automatic balancing bridge theory and algorithms to realize a higher precision measurement of capacitance and tanδ than Schering bridge.