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Generator Syncing

Discussion in 'Electrical Engineering' started by Jim Rojas, Oct 22, 2009.

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  1. krw

    krw Guest

    Also known as Nymbecile.
  2. Don Kelly

    Don Kelly Guest

    The original thread concerned some pump motors used as generators- these
    turned out to be induction motors. Synching in the sense that Paul mentioned
    is not needed as these will be asynchronous generators operating at the
    frequency determined by the system.
    I also remember synchronising small units routinely using either a
    synchroscope or lamps.
    Larger units do need a bit more care. It's easier on the equipment.
  3. Don Kelly

    Don Kelly Guest

    It's easy to synchronize a lab machine to the system and then to adjust
    loads. In that case the lab machine isn't going to measurably affect either
    the voltage or the frequency. It is also easy to synchronize one small
    machine to another, both driven by DC motors, Hold one steady and match the
    other in voltage and phase using lights. The fun that occurs next (and
    appears to be what you had) is load sharing (say with even a resistance
    load) and voltage control. If the people running the two units are both
    trying to control frequency and load as well as voltage and var sharing- you
    have two cats fighting in a bag. If one machine deals with load sharing and
    the other with voltage , it is somewhat easier but still a balancing act.
    It is also possible to pull a machine out of synch (under exciting can do
    it) in such a lab situations - so hit the breaker now or make a quick
    correction before any damage is done -those machines (if they were similar
    to what I used in class - typically about 5HP units -often Westinghouse, did
    have pretty good damper windings which helped.
    The "White and Woodson" universal machines, made by Westinghouse, which
    came out in the 50's for lab use could be configured as DC, or AC machines
    of any flavour- which was nice but they weren't typical in any mode of
    operation- one size doesn't fit all -but they did illustrate the principles
    in the White and Wilson text..
    Don Kelly
    cross out to reply

    Your heirs might not think so!
    If you have no heirs, then there is merit (?) in blowing it all and going
    into debt.

  4. **** off, Retardeus.
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