Resonance Modes at Harmonics Frequencies in Electrical Networks

Abstract

Resonance modes at harmonic frequencies in electrical networks are a serious problem. They arise due to the availability of electrical equipment with capacitive and inductive elements. The values of the harmonics of currents and voltages increase at resonances. The voltage quality indices in resonant modes exceed the limit values. Harmonics cause energy losses in electrical equipment, reduce its service life, create economic damage. Capacitor banks are often damaged by resonances. Network nodes with resonant circuits and resonant harmonics can be determined using the frequency characteristics of the nodal reactance (susceptance). The paper presents an algorithm and HARMONICS software for the analysis and forecasting of resonance modes, the results of studies of resonance modes in the high-voltage networks of Eastern Siberia.

Design of IOT-Based Framework for Evaluation of Energy Efficiency in Power Transformers

“…Nonlinear loads in the network generate nonsinusoidal currents [44]. Even if the consumer uses only linear loads, the current harmonics in the resonance conditions can flow through power transformer from other users [45], thus causing increased energy loss in the transformer. Both distribution system operators and end users should be concerned about the quality of electric power [46].…”