12 years ago
where S is apparent power, P is real power and Q is reactive power.
In this formula, I have two questions. Firstly, S, P, Q here are what
kind of power, average power? rms power (rms U * rms I)? Instantaneous
power (U * I from moment to moment)? After clarify the definition, can
anyone show a prove?
The second question is that I think, for energy, apparent energy should
be a sum of real energy and reactive energy. I learned this from
I right on the concept? If so, do you see the energy relationship
between apparent/active/reactive is different with power?
Finally, for these AC concepts, is there a good text book in amazon.com?
Thanks in advance.