The ABCD constants of a three-phase, 345-kV transmission line are:
A = D = 0.98182 + j0.0012447.
B = 4.035 + j58.947.
C = j0.00061137.
The line delivers 400 MVA at 0.8 lagging power factor at 345 kV. Determine the sending end quantities, voltage regulation, and transmission efficiency.
Hint: Efficiency is equal to the ratio of active power at the receiving end to the active power at the sending end.
Since, the given ABCD parameters for the 345 kV transmission lines are:
A = D = 0.98182 + j0.0012447
B = 4.035 + j58.947
C = j0.00061137
Also, this transmission line is operated to deliver power 400 MVA at lagging power factor of 0.8 and voltage 345 kV.
As the transmission line operates at voltage 345 kV thus, the receiving end voltage per phase for this transmission line is as:
Also, the power delivered by the transmission line is 400 MVA at a lagging power facto...
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