- #1
FionaZJ
- 16
- 0
What is the difference between apparent power and complex power? How to differentiate them?
Apparent Power vs Complex Power: Understand the Difference
- Thread starter FionaZJ
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Discussion Overview
The discussion centers on the distinction between apparent power and complex power in electrical engineering, focusing on definitions and formulas associated with these concepts.
Discussion Character
- Technical explanation, Conceptual clarification
Main Points Raised
- One participant defines complex power as IV, describing it as a complex quantity represented by P+jQ, where P is real power and Q is imaginary power.
- Another participant states that apparent power is the magnitude of complex power, expressed as √(P² + Q²), and emphasizes that it is a numerical value rather than a complex quantity.
- A participant questions whether both apparent power and complex power can be represented by the formula S = Vrms * Irms, seeking clarification on this point.
- Another participant confirms that RMS quantities are typically used in these calculations.
Areas of Agreement / Disagreement
Participants generally agree on the definitions of complex power and apparent power, but there is a question regarding the equivalence of the formulas used, which remains unresolved.
Contextual Notes
The discussion does not clarify the assumptions underlying the definitions or the context in which the formulas apply, leaving some aspects open to interpretation.
- #2
- 11,326
- 8,755
Complex power is simply IV. It is a complex quantity, not just a single number, typically written as P+jQ, where P is real power and Q is imaginary power.
Apparent power is the magnitude of complex power, ##\sqrt {P^2 +Q^2} ##. Apparent power is just a number, not a complex quantity.
- #3
FionaZJ
- 16
- 0
But both formula are S=Vrms*Irms ,right? Please correct me if i wrong.
- #4
- 11,326
- 8,755
Yes, RMS quantities are usually used.
- #5
FionaZJ
- 16
- 0
Okay. Thank you.