I have researched the power field more decades. It is strange to me why distortion power is not measured, registered and pay. From my researches in drives (air conditioners, elevators, drives in coal mines), so as in lighting, the consumption of distortion power absolutely is not negligible.
The unit is kVA. I done some measures (not yet publicated ). D can sometimes be greater than Q. It depends on voltage and current harmonics. D makes lossess in system but It is hard to know who is guilty for making D, consumer (current harmonic) or distribution system operator (voltage harmonis). Good area for researching...
It is not possible the D unit be the same as for apparent power S (kVA), because of DIN 40110. The unit should be same as for Q (kvar), according DIN 40110 too. I consulted more persons about this.
Technically speaking we have to eliminate the fault where it appears. So, we should measure D in possible sources.
Distortion power is not captured in vertical transportatio, reason being it may be very momentary and also under dynamic situations.very less.
As mentioned by professor Mircevski we measure S(Kva) and Q ( kvar) , the source need to be identified and corrective actions to be implemented
I will look over my literature next week, and then give some more comments.
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