Calibration of power quality analyzers on total harmonic distortion by standard periodic non-harmonic signals

The possibility of using standard periodic non-harmonic signals is considered instead of the traditionally used set of harmonic signals when calibrating by a total harmonic distortion of power quality analyzers. The use of squarewave, triangular, sawtooth signals and a truncated sine wave signal is proposed, which presented in Fourier order contain specific harmonic components. Thus, by selecting a specific standard periodic signal, a corresponding specific reference value of the total harmonic distortion is set. Results of calibration of Fluke 435 power quality analyzer using Metrix CX1651 calibrator are presented, which give an experimental estimate of the ability to calibrate by a total harmonic distortion using standard periodic non-harmonic signals.