基于数字低通滤波器的采样测量方法的研究  

The Sampling Measurement Method Based on the Digital Low-pass Filter

作　　者：郭松林[1] 王琳[2] 王学伟[2] 

机构地区：[1]黑龙江科技学院,黑龙江哈尔滨150027 [2]北京化工大学,北京100029

出　　处：《计量学报》2006年第2期164-168,共5页Acta Metrologica Sinica

基　　金：黑龙江自然科学基金(E01-15);高等学校骨干教师资助计划(1087)

摘　　要：研究了用∑-ΔA/D对三相电压、电流进行数字采样以及用数字信号处理器(DSP)进行数字滤波来实现电参数测量的原理。提出了一种比通常采样测量方法更快、更准确、更适宜被测波形畸变较大和在线实时监测的工频电参数的采样测量的新方法。对该测量方法及影响测量准确度的因素进行了定性和定量的分析,并给出了测量误差的估计公式。The digital sampling and filtering method of three-phase voltage and current through the ∑-△A/D converter and DSP to implement the electric parameter measurement are investigated. A new sampling measurement algorithm which is faster, more accurate than normal sampling methods and suitable to the real time large distorted waveform monitoring. The errors of method are analized and the influence factor of the measurement accuracy quantitatively and qualitatively are proposed. At last, error estimating equation is given.

关 键 词：计量学 数字采样 数字低通滤波器 工频电参数测量 

分 类 号：TB971[一般工业技术—计量学]