GATE Electrical Engineering (EE) 2020 Solved Paper

A cylindrical rotor synchronous generator has steady state synchronous reactance of $0.7$ p.u. and sub transient reactance of $0.2$ p.u. It is operating at $\left(1+\mathit{j}0\right)$ p.u. terminal voltage with an internal emf of $\left(1+\mathit{j}0.7\right)$ p.u. Following a three-phase solid short circuit fault at the terminal of the generator, the magnitude of the sub transient internal emf (rounded off to 2 decimal places) is __________ p.u.