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Why are reactive power and voltage related?

  1. Mar 23, 2016 #1
    I have read that reactive power sustains/ supports voltage. What is the reason behind this?
     
  2. jcsd
  3. Mar 23, 2016 #2

    Baluncore

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    There is almost certainly somewhere where that statement is true.
    We need more information on context to answer clearly.
    Can you please give us a link, or a book and page number, or attach a file.
     
  4. Mar 23, 2016 #3
    Thank you for your answer. I have done a google research and i diden't understand the reasons.I googled "reactive power and voltage control."

    Besides this, at my job, when i increase the excitation( the field current ) of the generator's rotor both voltage and reactive power are increased. What is the link between them? Sorry for my english.
     
  5. Mar 23, 2016 #4

    anorlunda

    Staff: Mentor

    The answer is yes. Next week a PF Insights article "AC Power Analysis Part 2" will be published explaining that very question.
     
  6. Mar 23, 2016 #5
    Thank you. I will wait
     
  7. Jun 17, 2016 #6
    Voltage control in an electrical power system is important for proper operation for electrical power equipment to prevent damage such as overheating of generators and motors, to decrease transmission damages and to maintain the ability of the system to endure and prevent voltage collapse.
     
  8. Jun 17, 2016 #7

    anorlunda

    Staff: Mentor

  9. Jun 17, 2016 #8

    jim hardy

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    to be more precise (if perhaps too brief and 3 months behind too)

    it's because the impedances connecting nodes tends to be more inductive than resistive, see anorlunda's insights article
    so by ohm's law
    the voltage across them causes current that's reactive.
     
  10. Jun 23, 2016 #9
    No , i didn't read these insights article.. ok i will read first. Thanks
     
  11. Jun 23, 2016 #10

    jim hardy

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  12. Jun 24, 2016 #11
    Hey @jim hardy Thanks for your reply.. i read Reactive Power Relationship thread. it is really helpful to me.. Again Thanks
     
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