1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Line impedance

  1. Oct 17, 2006 #1
    Can anyone tell me what is the relationship between the actual line impedance with the zero sequence impedances and positive sequence impedance?

    Let say I have the
    zero sequence impedance=0.15+1.79j
    positive sequence impedance=0.013+j*0.32

    what is the actual impendance?
    In real life, what impedance should can we get?
     
  2. jcsd
  3. Dec 1, 2006 #2
    The "real" impedance is the vector sum of the positive, negative and zero sequence components. The positive sequence impeadance is a set of balanced CCW rotating phasers, the negative sequence impedance is a set of balanced CW rotating phasers, the zero sequence impedances are a set of balanced non-rotating phasers. The vector sum of which will give you the real system impedances. If the system is perfectly balanced, solving for the sequence components will give you only the positive sequence components with a zero value for the negative and zero sequence components.

    Generally you use sequence component transforms to solve imbalanced three phase system problems. Hope this helps.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Line impedance
  1. Impedance ? (Replies: 5)

  2. Impedance Calculation (Replies: 1)

  3. Impedance and Current (Replies: 5)

Loading...