Power Flow Equations Set of non-linear simultaneous equations Need a simple linear relation for fast and intuitive analysis dc power flow provides such a relation but requires a number of approximations
Neglect Reactive Power
Neglect Resistance of the Branches
Assume All Voltage Magnitudes = 1.0 p.u.
Assume all angles are small
Why is it called dc power flow? Reactance plays the role of resistance in dc circuit Voltage angle plays the role of dc voltage Power plays the role of dc current