Phase verification of power test systems

Clarke, K.K.; Hess, Donald T.

doi:10.1109/19.278548

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2004

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“…The ability to provide stable power to the national electrical power standard, and to provide stable and accurate AC voltage, current and power, increases the scope of this instrument even more. In the time interval of about 2 min, which is in most cases enough to establish measurement data in a computer-controlled (automated) measurement system, output signals present extremely high stability of several parts per million, which, together with the phase angle stability of several microradians at power frequencies, represents the high end in many national laboratories' AC calibrators [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A phase angle standard

Mitrovic¹

2004

Meas. Sci. Technol.

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A phase angle standard for power frequencies (40-400 Hz) with a very low measuring uncertainty of 3 µrad is developed. The standard is based on a two-channel high-stability arbitrary waveform AC source for voltages up to 120 V and currents up to 6 A with high phase angle resolution which is realized as a development device with full computer control. A proper auto-calibration method is implemented for achieving ultimate performance in phase angle accuracy. The high performance of the phase angle standard is thoroughly evaluated and presented briefly.

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Section: Introductionmentioning

confidence: 99%