Публикации

Analysis of resonance modes at harmonic frequencies in high-voltage networks

Статья в журнале
Kovernikova L.I.
Renewable Energy and Power Quality Journal. Vol.18. ID: 355. P.391-396.
2020
Resonant modes in electric networks occur due to the presence of capacitive and inductive elements which compensate each other. Resonant circuits can occur on harmonic frequencies (further referred to as harmonics). If the networks have consumers of electric power having equipment with nonlinear current-voltage characteristics that consumes a nonsinusoidal current, then the harmonics of currents and voltages in the resonant circuits sharply increase. Harmonics create energy losses in electrical equipment, which causes its additional heating, leads to a reduction in service life and, as a result, additional economic damage. Passive filters and capacitors, which are used to compensate reactive power, are especially vulnerable in such cases. Resonant nodes of electrical network and resonant harmonics can be determined by calculating the frequency responses of the input impedances or admittances of the nodes for various network configurations and loads. The experience of studying harmonic modes in electric networks allowed us to develop a methodical approach and HARMONICS software for determining resonant nodes and resonant harmonics. The article provides methodical approach and some results of the research on resonant modes on the harmonics in the high-voltage networks in Eastern Siberia. © 2020, European Association for the Development of Renewable Energy, Environment and Power Quality (EA4EPQ). All rights reserved.

Библиографическая ссылка

Kovernikova L.I. Analysis of resonance modes at harmonic frequencies in high-voltage networks // Renewable Energy and Power Quality Journal. Vol.18. ID: 355. 2020. P.391-396. DOI: 10.24084/repqj18.355

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