电子式电能表中滤波器的设计

摘要

The measurement accuracy of power meters is very important as it is related to trade settlement.Based on analyzing the metrological algorithm of electronic power meters,the paper proposes an improved measurement methodology for impulse types of load conditions.Different types of digital filters will be studied using the MATLAB Digital filter tool FDA Tool (Filter design & Analysis tool).The results show that in cases of harmonic and impulse load conditions,active energy can he measured within an error range of ± 1％,whereas fundamental energy error within ± 0.1％,thus verifying the effectiveness of the presented method.%电能表计量结果涉及到贸易结算,计量准确性至关重要.本文在电子式电能表电能计量算法分析的基础上,对动态负载下计量算法误差较大提出了改进方法.在MATLAB仿真软上使用专门的数字滤波器设计工具FDA Tool设计数字滤波器.结果显示在有谐波和动态负荷情况下有功电能误差在±1％范围内,基波电能误差在±0.1％范围内,从而验证本文提供方法的有效性.