数字式电能表电压采样误差的理论分析与仿真  

Theoretical Analysis and Simulation of Voltage Sampling Error's in Digital Watt-hour Meter

作　　者：郑可[1] 侯兴哲[1] 李胜芳[1] 张淮清[2] 

机构地区：[1]国家电网公司电能计量器具性能评估实验室,重庆401123 [2]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《电测与仪表》2009年第S2期12-15,共4页Electrical Measurement & Instrumentation

摘　　要：证明了整周期采样无原理性误差,推导了非整周期采样的误差公式,仿真实验反映了电压频率、采样点数和采样起始角与相对误差的关系。在论文实验条件下:频率变化0.1Hz时误差变化约0.1%,采样点数与误差为反比关系,起始角与误差近似为余弦关系。结论同样适用于电流有效值的计量。The paper had proven that the integer-period sampling's error is zero,and inferred the non-integerperiod sampling's error formula.The simulation experiment has reflected the voltage frequency,the sampling numbers and the start angle and relative error's relations.Under paper's experimental condition:When frequency changes 0.1Hz,the relative error changes approximately 0.1%,the sampling number and the error are the inverse relation,the start angle and the error are approximate the cosine relations.The conclusion in this paper is suitable similarly for the current root mean square value measurement.

关 键 词：电能计量 有效值 整周期采样 误差分析 

分 类 号：TM933.4[电气工程—电力电子与电力传动]