1) During a transient fault and a permanent fault on the transmission line of a power network, mention the sequence of a line circuit breaker's operation.
2) During a network fault, the voltage and active power of a synchronous generator drops, but the speed increases. Explain why the generator's speed increases.
3) In case of a network fault, circuit breakers open, and then again they reclose after some time interval. Why is reclosing of circuit breakers needed?
4) At steady state, is the frequency always 50Hz/60Hz in a power network? Explain your answer.
5) What is swing equation? What is steady-state stability and transient stability?
6) Draw the torque-speed characteristics of induction machine.
7) Suppose you have two machines in the laboratory, one is DC and the other one is AC. But somehow the nameplates of the machines are lost. How can you distinguish the AC and DC machines?
8) During a network fault, draw the synchronous and induction generators terminal voltage, speed and real power responses.