Thang

Reactive power measurement using multimeter model

Good evening everyone.

I have a question about measurement of reactive power using multi-meter.

In the 3 phase system with the inductive load. I measured the reactive power of 3 phase using multi-meter and the result show the nagative value. But when I measure in each phase the reactive power is given in positive value as shown in attachment photo.

So could someone explain for me about this?

Thank you very much....

111111.JPG

Status: Open Apr 06, 2018 - 06:30 AM

reactive power mesurement

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mansoor

Apr 07, 2018 - 08:21 PM

This seems unreasonable. Do you mind sharing your pscad file.

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Thang

on 4/8/2018 1:31:27 PM | Like (0) | Report

Dear mansoor_hvdcepl
Following is my simple pscad simulation file, you can check the reactive power in 3 phase multimeter and the reactive power in each phase (width the inductive load)
many thanks

https://www.dropbox.com/s/aanlkdaxqmfax84/reactivepowerr.pscx?dl=0

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Thmf

Apr 09, 2018 - 05:17 PM

Dear Thang,
Change the phase angle of the voltage source. Change the phase angle of the second and third phases to 240 and 120 degrees, respectively.
regards
M. Tahmasbi

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Thang

on 4/9/2018 5:29:54 PM | Like (0) | Report

Dear Tahmasbi
Now I understood about that.
Many thanks.

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