Details
A new threat to grid operators: 2kHz-150kHz emissions, or “Supra-
harmonics”, can burn capacitors, knock out communications and
even foul up revenue meters.
The biggest single source? Emissions from photovoltaic inverters.
Some wind turbines, fuel cells, battery chargers can also be
significant sources.
Supra-harmonics also affect street lighting controls, household
dimmers, semiconductor manufacturing equipment, medical
scanners, security systems and transportation controls.