Question

A 132 kV transmission line having per phase line inductance of 10 mH/m and per phase line capacitance of $100\mu F/m$. If the line is 80 km long, its surge impedance loading is ________MW

• A. 1742.4

Answer 1

The correct option is A 1742.4
Inductance L = 10 mH/m
capacitance C = 100 $\mu$ F/m

Surge impedance of the line
$Z_s=\sqrt{\frac{L}{C}}=\sqrt{\frac{10\times {10}^{-3}}{100\times {10}^{-6}}}=10\Omega$

$Surgeimpedanceloading=\frac{132\times 132\times {10}^6}{10}=1742.4MW$