Low-frequency electromagnetic compatibility

[2] In time, switching power devices, such as transistors, became cheap, small and easy to use, invading all facets of human activity.

[4] The ratio of harmonic weight to the fundamental frequency in the LF EMC range also grew, leading to increased harmonic pollution, which disturbs the quality of power delivered to consumers, and disturbances to the informational and telecommunication systems nearby.

The diagnosis of supraharmonics-related problems based on the effects on electrical equipment was researched by Sakar et al.[4] The propagation of LF harmonics through LV and MV grids leads to interference with the elements for power delivery and end-user equipment, e.g., light flicker, aging of capacitors and cable terminations, audible noise and interruption of electric vehicle charging.

[4] On power converters, the LF harmonics were shown to generate in turn a series of EMC pollution problems.

A series of studies have already been published, but the professional community still has not solved some very important challenges in the low frequency domain of EMC and PQ.