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Q#1 Power System Stability GATE EE 2007 MCQ +2 marks -0.66 marks

Consider a synchronous generator connected to an infinite bus by two identical parallel transmission lines. The transient reactance x' of the generator is 0.1pu and the mechanical power input to it is constant at 1.0pu. Due to some previous disturbance, the rotor angle (δ) is undergoing an un-damped oscillation, with the maximum value of  equal to . One of the parallel lines trips due to relay mal-operation at an instant when · as shown in the figure. The maximum value of the per unit line reactance, x, such that the system does not lose synchronism subsequent to this tripping is

0.87  

0.74

0.67

0.54

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Network Analysis 259 0 0
Signals and Systems 164 0 0
Control Systems 201 0 0
Analog Electronics 180 0 0
Digital Electronics 148 0 0
Electrical Machines 390 0 0
Power Electronics 237 0 0
Power Systems 343 0 0
EMFT EE 9 0 0
Measurement 152 0 0
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