基于蒙特卡罗法的数字化电能表计量误差评估

摘要

In order to precisely evaluate the measurement errors of a digital energy meter, the relations between influence quantity errors and the combined errors must be researched.Due to the complexity of the measurement model of digital energy meter, it''s difficult to find the formula of combined error;therefore, a Monte Carlo method was adopted.Through Monte Carlo simulation calculation and statistic characteristic analysis, the distribution characteristics of combined error and influence quantity errors have been obtained, and their relations have been validated.The conclusion can provide a reference for the accuracy gradation of a digital energy meter, as well as the influence quantity limit errors determination.%为了准确地评估数字化电能表的计量误差,对影响量误差和综合误差间的关系进行研究.由于数字化电能表计量模型的复杂性,无法直接给出综合误差的解析结果,为此,采用蒙特卡罗法,通过仿真计算和统计特性分析,得到了数字化电能表综合误差及影响量误差的分布特征,并验证了它们之间的函数关系.分析结论可为数字化电能表影响量误差限值的确定及等级划分提供参考.