Reduce harmonics produced by microcontroller

1. Which filter is used to reduce harmonics?
2. How do you reduce harmonics with an AC filter?

Which filter is used to reduce harmonics?

Active harmonic filters, also called harmonic correction units, are parallel devices that act like a noise cancellation system and inject equal and opposite frequencies to mitigate harmonics.

How do you reduce harmonics with an AC filter?

Shunt harmonic filters connected to the converter a.c. bus-bars provide a low impedance into which most of the harmonic currents are diverted. Shunt filters also generate reactive power at fundamental frequency providing some or all of the reactive power required by the converters.