A 80 MVA, 14.4 kV, 0.85 lagging, four pole, three phase, Wye connected, 60 Hz synchronous generator has a no load speed of 1825 RPM and full load speed of 1780 RPM. (a.) Calculate the speed droop of the machine. (b.) If the generator is placed in the infinite bus with system frequecny of 60 Hz, what is the power the generator is supplying to the bus

The answer is: c. from underground

Distance covered = speed x timethe distance traveled going against the stream = distance traveled with the stream.therefore it is the speed and the time that are the variables.as he travels the same distance both ways, speed x time is the same for each way.going upstream his speed is 4 kph; going downstream his speed is 6 kph.therefore we have two simultaneous equations: time upstream x 4 = time downstream x 6time upstream + time downstream = 60 minutestherefore we have the equation: time upstream = 6/10 hour, time downstream therefore = 4/10 hour.distance traveled at 4km/hr in 6/10 hour = 24/10 = 2.4km.check: distance traveled at 6km/hr in 4/10 hour = 24/10 = 2.4km.