Short Transmission Line Efficiency & Regulation Calculator
For a short transmission line, the receiving-end voltage is approximated by:
\[
V_R = V_S – \frac{I\Bigl(R\cos\phi + X\sin\phi\Bigr)}{1000}
\]
where \(\phi=\arccos(PF)\). Then, the efficiency is
\[
\eta = \frac{V_R}{V_S}\times100\%
\]
and the voltage regulation is
\[
\text{Regulation} = \frac{V_S-V_R}{V_R}\times100\%.
\]
* Enter sending voltage (kV), line current (A), power factor, and line impedance values (R and X in ohms).
Step 1: Enter Transmission Line Parameters
Example: 220 kV
Example: 500 A
Example: 0.95
Example: 0.2 Ω
Example: 0.3 Ω