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The analysis of power meters' performance under nonsinusoidal conditions

The conventional definition for power measurement becomes contentious under nonsinusoidal conditions. This paper discusses the measurement principle and error analysis of induction watt-hour meter in the cases of non-harmonics and a variety of harmonics. In contrast with non-harmonics, the measuring process and the complexity of the measurement errors are analyzed under nonsinusoidal conditions. Then, the laws of measurement errors are summed up and a model of power measurement is proposed.