matching sine wave cycles

Discussion in 'General Electronics Chat' started by aac9876, Jul 4, 2007.

  1. aac9876

    Thread Starter Active Member

    Dec 9, 2006
    There are grid tie wind turbine systems these days that are tied
    right into your house service box. I have heard that the sine wave that comes out of the inverters on these systems aligns itself automatically with the cycle on the incoming power line. In otherwords it does it without any circuitry.[ I mean only this part of the mating,there is plenty of circuitry for other things.]

    That way there is no problem with harmonics,{hopefully} Why does this happen?
    How does the grid force the inverter wave to be in identical form
    to it ??
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    Look up "synchronous inverter'.
  3. aac9876

    Thread Starter Active Member

    Dec 9, 2006
    thats not an answer. Articles on synchronous inverters blabber on without saying anything understandable.
  4. recca02

    Senior Member

    Apr 2, 2007
    i guess it is similar to running a generator in parallel to a grid (i may be wrong).
    when u synchronise a generator in parallel to a grid(phase ,frequency,phase sequence,voltage must be same) the grid opposes any change in generator o/p by sending a current thru it to balance any deviation. but then how can that work for inverter?
  5. n9352527

    AAC Fanatic!

    Oct 14, 2005
    The inverter tracks the mains phase and voltage and adjust its output accordingly. Like beenthere said, it's a synchronous inverter. It does need circuits to do this.
  6. thingmaker3

    Retired Moderator

    May 16, 2005