介质损耗tanδ测量的非同步采样改进算法及仿真研究  

Simulation study and improved algorithm of asynchronous sampling in dielectric loss factor measurement

作　　者：黄丽霞[1] 廖建庆[1] 

机构地区：[1]宁德师范学院物理与电气工程系,福建宁德352100

出　　处：《陕西科技大学学报（自然科学版）》2013年第4期114-117,共4页Journal of Shaanxi University of Science & Technology

基　　金：宁德师范学院"服务海西"资助项目(2012H408);宁德师范学院"服务海西"重点资助项目(2011H102);宁德师范学院"服务海西"资助项目(2012H306);宁德市科技计划资助项目(20110093)

摘　　要：针对介质损耗因数测量中非同步采样下存在不同程度误差,提出一种非同步采样改进算法.利用复三角函数性质,结合Hilbert变换特性,通过理论推导出介质损耗角表达式,最后建立电气设备的等效模型对改进算法进行仿真实验.仿真结果表明该算法有效地解决了由频率波动引起的非同步采样和非整周期采样问题,提高了介质损耗因数测量精度.This paper presented an improved algorithm of asynchronous sampling. The algo rithm is integrated with Hilbert transform and complex triangle function. The dielectric loss measurement principle and asynchronous sampling algorithm has been introduced. Dielectric loss Angle is deduced with the sampling signal frequency independent based on the improved algorithm. In theory,signal sampling length has nothing to do it,the whole cycle sampling is not sensitive. The simulation results show that the algorithm can solve the frequency fluctuation problem. It has improved the dielectric loss factor measurement precision.

关 键 词：介质损耗因数 HILBERT变换 复三角函数 非同步采样 

分 类 号：TM835[电气工程—高电压与绝缘技术]