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Q#1 Power System Stability GATE EE 2000 MSQ +2 marks -0 marks

A synchronous generator, having a reactance of 0.15p.u, is connected to an infinite bus through two identical parallel transmission lines having reactance of 0.3p.u. each. In steady state, the generator is delivering 1p.u. Power to the infinite bus. For a three-phase fault at the receiving end of one line, calculate the rotor angle at the end of first time step of 0.05 seconds. Assume the voltage behind transient reactance for the generator as 1.1p.u. and infinite bus voltage as 1.0p.u.

When breaker clears the fault at the end of an interval, Accelerating power will be considered as the average of before and after faults.

When breaker clears the fault at the middle of an interval then we will have to consider the accelerating power same as that of beginning of that interval, i.e.

 

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