High accuracy and traceable power quality instrument calibration using high-speed digitizing technique

Owing to the rapid development in electricity smart grids as well as the rapid increase in renewable energy sources, there has been more focus on the measurement of power quality (PQ) signals. Voltage harmonics, inter-harmonics and flicker are major power quality parameter. Recently, Standards and Calibration Laboratory (SCL) in Hong Kong has developed a traceable calibration service based on digital sampling and discrete Fourier transformation techniques for the calibration of voltage harmonics, inter-harmonics and sinusoidal flicker components. The technique simplifies the process without compromising the measurement accuracy.