多通道直流大电流比较仪的稳定性  

Stability of the Multichannel Comparator for Heavy Direct Current

作　　者：王晓蔚[1] 

机构地区：[1]河北省电力研究院,石家庄050021

出　　处：《高电压技术》2008年第8期1563-1566,共4页High Voltage Engineering

基　　金：国家自然科学基金(50277018)~~

摘　　要：为了解决多通道直流大电流比较仪的通道封闭问题,对多通道直流大电流比较仪的稳定性进行了研究。设计的多通道直流大电流比较仪的每个通道铁心间有一段空气隙,以消除铁心的剩磁;每个通道构成一个独立的直流比较仪,各通道采用双重磁检测传感原理与方法,提高了稳定性;基于劳斯判据可分析线性系统的稳定性,根据劳斯阵列的第一列元素符号为正值可判断多通道直流大电流比较仪的闭环系统是否稳定。计算结果表明:设计的多通道直流大电流比较仪,各通道运行稳定,不会出现通道封闭的情况。The Stability of the multichannel comparator for heavy direct current is studied. An air gap between two channels can counteract remnant magnetic field in iron core. Every channel based on double magnetic detector sensing theory is an independent direct current comparator. The element in the first list of Routh array is positive value. It is can be judged that the closed loop system of multichannel comparator for direct current is stable. Every channel of the multichannel comparator for heavy direct current can run stably. The channel will not close anvtime

关 键 词：多通道 双重磁检测原理 劳斯判据 稳定性 前馈补偿 直流大电流 

分 类 号：TM835.2[电气工程—高电压与绝缘技术]