How to convert ?

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Beibit Sautbek
Beibit Sautbek 2016-8-24
编辑： Beibit Sautbek 2016-8-26
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  2 个评论
Guillaume
Guillaume 2016-8-24
If the definition of Pr is Pr = E^2, then the only correct result is Pr = 2.2007e+04 + 9.7496e+02i.
If the definition of Pr is Pr = ‖E‖^2, then the only correct result is Pr = 22030.
You certainly can't swap one for the other.
Star Strider
Star Strider 2016-8-24
@Guillaume —
The second is correct, but only partially so. Complex power is actually referred to in phasor notation:
Pr = [abs(E).^2 angle(E)*180/pi]
Pr =
22030 1.2683
here indicating a positive phase lag in degrees (inductive load).

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采纳的回答

Star Strider
Star Strider 2016-8-24
Use the abs function, then square the result:
E=1.4839e+02 + 3.2852e+00i;
Pr = abs(E).^2
Pr =
22030
This gives a lightly different result than 2.2009e+04 because of the lower precision in the numbers you posted.

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Thorsten
Thorsten 2016-8-24
abs(E)^2

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