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Generators in Parallel

  1. Aug 9, 2011 #1
    Suppose in a hyro-power plant, there are two generators, G1 and G2 of 11KV output voltage.
    The Transmission Voltage is 132KV. There are 2 11 Kv/132 Kv transformers.
    So, should we connect each generator separately to the Transmission line and synchronize individually OR should we first connect both generators in parallel (at 11 KV bus bar) and synchronize them before connecting to the grid.
    Whats better?
     
  2. jcsd
  3. Aug 9, 2011 #2

    dlgoff

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    I'm thinking the former in order to do line protection schemes.
     
  4. Aug 9, 2011 #3
    I was also thinking like that.
    But If You also need to have Local 11 KV supply, then do you use a third 132KV/11KV transformer Or Would You directly tap-off from 11 KV Bus by paralleling two generators ?
     
  5. Aug 9, 2011 #4

    dlgoff

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    Remember that transformers work in both directions. When one unit is down, power could be taken from the 132KV side.
     
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