Harmonic level measurements and analysis at higher education buildings

Advances in power electronics have led to the use of non-linear devices in power systems. Such devices significantly distort the voltage and current waveforms, injecting current harmonics into the distribution network. This paper reports on measurements of the voltage and current harmonic levels for a total period of three weeks, conducted at the low voltage bus of two higher education institutions, feeding several types of loads. The findings are the voltage and current profiles of the most significant harmonic components. The recorded data are also statistically processed using box plots.