Reducing Harmonics

Reduce the harmonics - Filter them

Make the systems immune to harmonics

All electronic equipment like speed drive, computer and e.t.c.. need to install filters to filters up all the disturbance to the line.

Series inductance and parallel capacitance to form tuned circuits that reject the higher frequency harmonics.

A tuned circuit has a frequency response that enables the circuit designer to tune-out the unwanted frequencies and let pass the wanted ones. The technique is widely used widely in radio transmitters and receivers.

You might try eliminating the source of the harmonics. This is typically from devices that turn AC power into DC using only a cheap full wave bridge network. The result is large gulps of power only during the peak of the waveform. These gulps are loaded with harmonics. Newer power supplies convert a steady amount of power over a larger portion of the incoming AC supply, thus drawing power at the fundamental supply frequency.

Or, you could invest in some big isolation transformers and let the harmonic energy burn off as as heat in the core of the transformer.