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

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.