What is Reactive power: Definition and 56 Discussions

Instantaneous power in an electric circuit is the rate of flow of energy past a given point of the circuit. In alternating current circuits, energy storage elements such as inductors and capacitors may result in periodic reversals of the direction of energy flow.
The portion of instantaneous power that, averaged over a complete cycle of the AC waveform, results in net transfer of energy in one direction is known as instantaneous active power, and its time average is known as active power or real power. The portion of instantaneous power that results in no net transfer of energy but instead oscillates between the source and load in each cycle due to stored energy, is known as instantaneous reactive power, and its amplitude is the absolute value of reactive power.

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  1. F

    Engineering Find the reactive power before power factor correction

    Relevant Equations: My solution: Could someone please verify my answer?
  2. shehanshashika

    Figuring Out the Reactive Energy Measurement Method with Field & Lab Tests

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  3. E

    Why is a capacitor a generator of lagging reactive power?

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  4. J

    Reactive power requirement requires which element

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  5. J

    Calculate Real and Reactive Power and write equation for S = P + jQ

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  6. A

    Calculating the reactive power of a transmission line

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  7. L

    Why reactive power is not tranferred between source and load

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  8. peroAlex

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  9. G

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  10. cnh1995

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  11. Deniz

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  12. G

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  13. O

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  14. L

    Why are reactive power and voltage related?

    I have read that reactive power sustains/ supports voltage. What is the reason behind this?
  15. V

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  16. nothing909

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  17. Passionate Eng

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  18. P

    Tap Changing (ULTC) Transformers and Reactive Power Control

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  19. Ahmad Kishki

    Understanding Reactive Power and Reactance: Exploring Complex Power Components

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  20. F

    Apparent Power, Real Power and Reactive Power

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  21. R

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  22. D

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  23. N

    What Could Be Causing Negative Reactive Power in a Three Phase Power System?

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  24. P

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  25. C

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  26. D

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  27. E

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  28. W

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  29. D

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  30. J

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  31. M

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  32. G

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  33. S

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  34. B

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  35. A

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  36. S

    What is the difference between apparent, reactive, and real power?

    hi dudes... i m confuse about apparent, reactive and real power, please explain...any help wll be appreciated..thanks in advance
  37. R

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  38. E

    Is Reactive Power Useful? When Should It Be Minimized?

    Yes I understand the definition of reactive power. It is the power that flows back and forth on transmission lines and does not do work(correct me). My question is, is reactive power useful? In what case reactive power has to be minimized as low as possible? I read an article about the...
  39. A

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  40. A

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  41. M

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  42. G

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  43. H

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  44. W

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  45. E

    Reactive Power: A Strange Concept?

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  46. B

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  47. F

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  48. W

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  49. S

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  50. S

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