Discuss the various factors to be considered while constructing the sequence network of power sysytem
1 Answer

Steps to be followed

  • Positive Sequence network:
  • For any given condition(sub-transient, transient or steady state), draw the per unit reactance diagram, which will represents the positive sequence network
  • Negative sequence network:
  • Determine the per unit negative sequence impedances of all elements
  • If the value of the negative sequence is not mentioned for any element, it can be approximately consider as equal to positive sequence impedance
  • Zero Sequence network:
  • Draw the zero sequence network corresponding to the grounding conditions of different elements of the power system.
  • Mention all the impedances by its zero sequence values.
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