// multi-utility computation suite · offline · instant · precise
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eng.load-flow-DC-approximation Calculator
Calculates power flow in a transmission network using the DC load flow approximation (linearised, lossless) from power injections and line reactances. The DC load flow ignores reactive power and line resistances — it gives P-flows and bus angles but not voltages.
Inputs
Pg Mw
Rate of energy transfer (W). P = V×I (electrical). P = F×v (mechanical). 1 horsepower ≈ 746 W.
Pd Mw
Rate of energy transfer (W). P = V×I (electrical). P = F×v (mechanical). 1 horsepower ≈ 746 W.
X12 Pu
Reference formula or conversion factor shown for context.
Sbase Mva
Reference formula or conversion factor shown for context.
Results
voltage angle difference θ₁₂ (°)
The arithmetic difference between the two values.
power flow P₁₂ (pu)
Reference formula or conversion factor shown for context.
power flow P₁₂ (MW)
Reference formula or conversion factor shown for context.
P₁₂ = (θ₁-θ₂)/X₁₂
Reference formula or conversion factor shown for context.
DC model assumptions
The most frequently occurring value.
thermal limit check
A pass/fail verification against the applicable code, standard, or threshold.