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Three phase power measurement

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sarkararghya

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Hi,
I want to measure three-phase active and reactive power for
unbalanced non-sinusoidal power signals.

For unbalanced system this can be measured as

P[/b](act)=V(12)I(1)COS φ(12)+ V(32)I(3)COS φ(32).........(1)

P(react)=V(32)I(3)COS φ(32)-V(12)I(1)COS φ(12) .......(2)

But at the presence of harmonics what is the particular form of
(1)and (2).

Please comment on this matter.

sarkararghya
 

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