Measurement of quality indicators of electrical energy in computer class network and development of measures to filter higher harmonics

Abstract

In the work the measurement of electrical energy quality indicators (PEC) of a computer class power supply system of one of the educational institutions of the city of Omsk using electrical energy quality analyzers is carried out. The composition of each personal computer includes a switching power supply. It is the source of higher harmonics that violate the standards of the SCE, established by GOST 32144-2013. To eliminate the influence of higher harmonics on the power supply network elements and prevent the occurrence of resonant modes, the authors of the article proposed the calculation of parameters and the installation of passive filters in the network under study. Developed mathematical modeling in the software package MATLAB-Simulink confirms the author’s hypothesis about the effectiveness of the use of filters.