谐波条件下时分割乘法器计量误差的量化分析

Quantitative Analysis on Measuring Errors of Time Division Multiplier Under Harmonic Conditions

时分割乘法器是模拟式电子式电能表的重要组成部分,也是电能表计量误差的最主要来源。文中对时分割乘法器在谐波条件下的计量误差进行了定量的研究与分析,根据时分割乘法器的工作原理,推导出其在谐波条件下计量误差的理论表达式,并通过仿真计算验证了计量误差量化表达式的准确性。从计量准确性和成本角度综合比较了时分割乘法器电能表与数字式电子式电能表。最后,对谐波电能计量的合理性进行了探讨。为定量化分析谐波条件下计量系统的误差提供了理论依据,对于适用于谐波条件下计量的电子式电能表的设计具有参考价值。

The time division multiplier (TDM) is an important part of the analog electronic energy meter and also the all-important source of measuring errors.This paper performs quantitative research and analysis on measuring errors with TDM under harmonic conditions.According to the working principle of TDM,the theoretical expression for measuring errors under harmonic conditions is deduced.The correctness of the proposed theoretical expressions is validated through simulation calculations.The TDM energy meter is comprehensively compared with the digital electronic energy meter in terms of the measuring accuracy and cost.Finally,the measuring rationality of electric energy in the harmonic background is discussed. This paper provides a theoretical basis for the quantitative analysis of the error of the measuring system and can be used as a reference for designing electronic energy meters applicable to measurement under harmonic conditions. This work is supported by National Natural Science Foundation of China(No.51007065).