Impact of Background Voltage Distortion and Unbalances on Phase-Crossed-Frequency Harmonics

This paper investigates the impact of harmonic distortion and system unbalances on harmonic generation via simulations and measurements. The interactions between different phases, frequencies, and resonances are examined, highlighting their effects on phase and cross-frequency behavior. Amplifications and attenuations occur and are studied in a micro- grid system. The analysis focuses on the influence of background voltage distortions at the 5 ^th , 23 ^rd , 49 ^th , and 103 ^rd harmonic orders, as well as unbalances, under various simulation scenarios. Finally, comparisons are made to illustrate the relationship between background voltage distortions and the existing non- linear loads within the system.