Hi,
There are tools that permit the plant engineer to know a lot more about what is going on.
Appropriately, located meters with full harmonic capability do allow one to ‘see’ the harmonic distortion levels at the location of the meter. This will provide a lot of insight and can prevent operational problems
by taking action when ‘unsafe’ levels of harmonics exist.
Reporting from the meters to a central location with ‘warnings’ when defined levels of THDv and THDi are exceeded can go along way to insure you know and can take corrective actions.