变压器油中气体检测专用色谱柱分离方程研究  

Chromatographic column separation equation of gases dissolved in transformer oil

作　　者：周利军[1] 吴广宁[1] 王云飞[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《电力自动化设备》2007年第12期32-35,共4页Electric Power Automation Equipment

基　　金：铁道部科技开发项目(2002J036);电力设备电气绝缘国家重点实验室开放课题基金项目~~

摘　　要：建立色谱柱分离方程是提高绝缘油中气体分析技术(尤其是变压器油中故障气体在线监测技术)可靠性的有效途径之一。确定了一定外部条件(色谱柱温度一定且色谱柱入口与出口的气压差一定)下,各种不同气流速度的绝缘故障气体在色谱柱中保留时间的计算式;根据塔板理论确定色谱峰宽、塔板数及气体保留时间的关系,利用Van Deemter的板高方程推导色谱峰宽与气体流速的关系式;根据高斯分布原则确定色谱峰宽、气体保留时间及色谱峰高的关系式,从而确定了色谱柱输出端各种故障气体的体积分数分布曲线,建立了色谱柱气体分离的数学方程。设计GDX502+PORAPACK N色谱柱的分离实验,用实验确定色谱柱分离方程的待定参数,实验测试表明计算结果的误差小于4%。The chromatographic column separation equations are used to improve the reliability of DGA（Dissolved Gases Analysis） for the DGA-based on-line monitoring of power transformers. The formulas for calculating the time of gases with different speeds retaining in chromatographic column are set when the temperature of column and the air pressure difference between input and output ports are constant. The relationship among peak width,plate number and remaining time is set according to plate theory,the relationship between peak width and gas velocity is set according to Van Deemter＇s plate height equation, and the relationship among peak height,peak width and remaining time is set according to Gauss distribution principle. The distribution curve of output gases is thus obtained and the mathematical chromatographic column separation equation is created. Experiment is designed to determine the parameters of separation equation of GDX 502 ＋ PORAPACK N chromatographic column,and result shows the calculating error less than 4 %.

关 键 词：色谱柱 保留时间 塔板理论 板高 

分 类 号：TM855[电气工程—高电压与绝缘技术]