Fault Analysis Positive Sequence Voltage

Discussion in 'Homework Help' started by shespuzzling, May 9, 2011.

  1. shespuzzling

    Thread Starter Active Member

    Aug 13, 2009

    When working out a positive sequence network to perform fault analysis, if your original network has a voltage source at some value (say 1.5<50) and you are connected to a load which is an infinite bus at some other voltage (say 1<0), how do you figure out the equivalent voltage in the positive sequence network? Is it the difference between these two? Or do you calculate the pre-fault voltage at the fault location? Or is it the thevenin equivalent voltage at the fault terminals?

    Help is much appreciated. Most books have these problems with both the source and the load equal to 1<0 p.u. and then that's the value they use in the positive sequence diagram, but I'm not sure of the reasoning.