The objective of this paper is to fully characterise the
harmonic attenuation/amplification that occurs under
practical conditions. Our research findings suggest that the
main impacting factor on whether harmonic attenuation or
amplification occurs is the harmonic voltage phase angle
and its effect on the supply voltage waveshape. Two
indices, namely the peak displacement (PD) and crest factor
(CF), are used for describing waveform distortion of supply
voltage. This work is based on an equivalent circuit for
single-phase diode-bridge converter-based loads. It is
supported by extensive measurements that are presented in
the corresponding sections in this paper.