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Syncronous generators question with power factors

  1. Feb 18, 2012 #1
    Hi everyone i am having some trouble with an electronics question I realy need some help with. I keep getting 14.96 KV but that doesnt appear to be the correct answer. Is the answer given wrong or am i doing something wrong. Thanks for any help i have been stuck on this for ages.


    1. The problem statement, all variables and given/known data

    An isolated, 10 MVA, 11 kV, three-phase, star-connected synchronous generator has negligible armature resistance and a synchronous reactance of 5 Ω. At a certain field current the generator delivers rated load at 0.9 pf lagging at 11 kV. If the excitation remains unchanged determine the terminal voltage when the full load power factor is 0.9 leading.

    2. Relevant equations

    None provided- Answer given is [15.4 kV]



    3. The attempt at a solution

    Please see attachement
     

    Attached Files:

    Last edited: Feb 18, 2012
  2. jcsd
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