Abstract
The purpose of the analysis of measurement results of harmonics presented in this paper is to predict the potential dangers after installation of capacitor banks in a medium-voltage (6 kV) network of the Kolubara open pit mine. Although the measured values for most of the harmonic voltages are lower than the maximum allowed values for medium-voltage networks, there is a risk of resonant occurrences of certain harmonics. It is shown that the resonant harmonic currents of the 11th to 25th orders can increase up to 10 times. These increases in harmonic currents could not overload network elements, but they could lead to overload and outage of the power capacitors. It is particularly important to note that the (quasi-) resonant phenomenon, which is common for harmonics between the 11th and the 25th order, is difficult to avoid without performing additional measures.
Highlights
Analiza viših harmonika napona i struje i opasnosti od rezonance u mreži sa kondenzatorima
U radu su prikazani rezultati merenja viših harmonika napona i struje i ukupne harmonijske distorzije napona na primarnoj (PS) i sekundarnoj strani (SS) transformatora 35/6 kV koji se napajaju iz TS 110/ 35 kV Vreoci
It is shown that the resonant harmonic currents of the 11th to 25th orders can increase up to 10 times
Summary
Analiza viših harmonika napona i struje i opasnosti od rezonance u mreži sa kondenzatorima 2. Rezultati merenja harmonika napona, struje i ukupne harmonijske distorzije napona u mreži TS 10/35 kV
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