Accounting the influence of higher harmonics in calculating the power and energy losses arising in the cable power line when connecting to network of group of personal computers

Abstract

In this paper, physical measurements of the electrical energy quality indicators (SCE) for an electrical network feeding the
computer class of one of the educational institutions of the city of Omsk are made. Based on the data obtained during the
experiment, the amplitude-frequency spectrum of the harmonics is determined. It is established that PCEs are violated when PCs work, which in some cases go beyond GOST 32144–2013. The calculation of the losses of power and active energy appearing in the cable power line in the presence of higher harmonics in the network is made. Losses are determined for each of the harmonics separately, and total losses. It is shown that the losses arising at the frequencies of the higher harmonics should be taken into account in the calculations. The installation of higher harmonic filters is proposed to improve the PCE (so that they comply with the requirements of GOST 32144–2013).