At what value of load angle (δ) does the maximum power transfer in a power system?

Question

Question

This question was previously asked in

PGCIL DT Electrical 13 Aug 2021 Official Paper (NR I)

Answer 1

Concept:

The maximum power transfer capacity of the transmission line is given by

\(P = \frac{{\left| {{V_s}} \right|\left| {{V_r}} \right|}}{X}\sin δ \)

Where,

|Vs| is sending end voltage of transmission line

|Vr| is receiving end voltage of transmission line

X is the series reactance of transmission line

δ is load angle

Explanations:

For maximum power transfer, sin δ should be equal to 1, so δ = 90°