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.