The international standardization community is currently reviewing the supraharmonics distortion limits. These are harmonics which fall in the frequency range 2 to 150 kHz. Power electronics has consolidated as a ubiquitous technology, which also plays a critical role in this subject. Broadly speaking, these HF components are due to the normal operation of electronic converters and the switching techniques employed. The paper presents measurements of waveform distortion from several illustrative facilities and loads. Recent studies indicate that future problems to distribution grids may include supraharmonics. Grid-tie inverters are an origin of waveform distortion, still in this frequency range, but, can also be the pillar to mitigate it, when methodologies like random pulse with modulation or modular multilevel converter are properly applied