Hi,
Supposing we have a 10kW installation. -Consisting of a three phase supply. Each phase is transformed (50Hz transformer) down to 40VAC with a mains transformer. Then there are a huge number of 3-phase, 6 pulse rectifiers feeding off the 40VAC. These provide power to loads of 40W power supplies.
As you know, the current waveform in each phase will not be pure sinusoid in this case.
However, is there any equipment that can be bought, which can be put “in-between” the 50Hz mains transformer, and the six pulse rectifiers, which will result in the supply current and voltage both being sinusoidal and in-phase with each other?