With the widespread application of power electronics technology, the proportion of non-linear loads in the power grid is increasing day by day. This has led to harmonic pollution becoming a key issue affecting power quality, equipment safety, and stable system operation.

The purpose of harmonic mitigation is to eliminate or suppress harmonic currents and voltages generated by non-linear loads in the power system, ensuring that the power supply complies with national standards and extends equipment lifespan. The following provides a detailed explanation from four aspects: harmonic hazards, mainstream harmonic mitigation solutions, a comparison of different solutions, and implementation recommendations.