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The precision measurement for harmonic current and power up to 60th order and some validating experiments is reported. The uncertainty of harmonics current reference to fundamental is less than 36 muA/A (k=2) for range up to 50 A. The uncertainty of harmonic power reference to the fundamental apparent power is less than 42 muW/VA (k=2) for voltage and current range up to 500 V and 50 A.
For calibration of analyzer of harmonic voltage, current and power under non-sinusoidal condition at fundamental in industrial frequency, a harmonic power standard has been built at NIM, in which non-integer-period sampling is applied. Its setup, algorithm, and whole uncertainty are reported.
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