Question

Determine the kinetic energy stored by a 300 MVA, 60 Hz, two pole synchronous generator with...

Determine the kinetic energy stored by a 300 MVA, 60 Hz, two pole synchronous generator with an inertia constant H of 5.66 MJ/MVA. Assume the machine is running steadily at synchronous speed with a shaft input of 366000 hp. The electrical power developed suddenly changes from its normal value to a value of 200 MW. a. Determine the acceleration or deceleration of the rotor. b. If the acceleration computed for the generator is constant for a period of 10 cycles, determine the change in the power angle in that period. c. The rpm at the end of 10 cycles.

Engineering   Electrical-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A two-pole Y-connected generator rated at 13.8 kV, 20 MVA, 0.8 p.f. leading is running at...
A two-pole Y-connected generator rated at 13.8 kV, 20 MVA, 0.8 p.f. leading is running at 1800 rpm. The generator has a synchronous reac- tance of 8 Ω per phase (at 60 Hz) and a negligible armature resistance per phase. The generator is operated in parallel with an interconnected power network. Compute the following: (i) What is the torque angle of the generator at rated conditions? (ii) How many MW of power this generator can deliver?
A 54-slot stator of a synchronous generator is wound for three-phase, 50-Hz, 6-pole applications. Determine (a)...
A 54-slot stator of a synchronous generator is wound for three-phase, 50-Hz, 6-pole applications. Determine (a) the number of coils in a phase group, (b) the slots per pole, (c) the slot span,(d) the coil span, and (e) the speed at which the rotor must be rotated.
A three-phase 55 Hz, 500 MVAR, 11.8-kV, 6 pole steam turbine generating unit has an H...
A three-phase 55 Hz, 500 MVAR, 11.8-kV, 6 pole steam turbine generating unit has an H constant of 5 p.u. Determine a) synchronous mechanical and electrical angular frequencies, b) Consider the damping is ignored and the initial rotor angular position is 30 degrees. Find the electrical and mechanical rotor angular position in radians after three cycles if the mechanical power is 1 p.u. and the generator rotates at synchronous speed. C) The unit is operating at Pm=1 and the synchronous...
A 3-phase, 1.2 MVA, Y-connected, 6.6 KV, 6-poles, 60 HZ, synchronous generator has a synchronous reactance...
A 3-phase, 1.2 MVA, Y-connected, 6.6 KV, 6-poles, 60 HZ, synchronous generator has a synchronous reactance of 30W and negligible resistance. The generator is connected to an infinite bus at 6.6 KV and 60 Hz. a)Determine the excitation voltage (Ea) when the machine is delivering rated power at o.8 PF lagging. b)The field excitation current is increased by 10% without changing the power input from the prime mover. Find the stator current (Ia), the power factor and the reactive power...
A 3 phase 11 kv,25 mva, 60 Hz salient pole synchronous motor is running from a...
A 3 phase 11 kv,25 mva, 60 Hz salient pole synchronous motor is running from a 11 Kv, 60 Hz balanced three phase supply the meachince reactances are Xd=1.2 pu and Xq=0.6 pu ,neglect the meachanicalloss and armature copper loss the maximum power input is obtained with no field excitation determine the power factor of motor
20-pole, 200 hp, 660 V, 60 Hz, Y-connected, three-phase synchronous motors are operating at no load....
20-pole, 200 hp, 660 V, 60 Hz, Y-connected, three-phase synchronous motors are operating at no load. The rotor lags 0.5 degrees to the magnetic flux of the rotor with a mechanical angle, with the induced equipment power adjusted to the same magnitude as the phase voltage applied to the armature. The synchronous reactance is 10 ohms and the armature resistance is 1 ohms. Find a) The load angle of the rotor expressed in electrical angles. b) Armature current c) Equivalent...
A three-phase, 9,375 kVA, 13.8 kV, 4-pole, 60 Hz, Y-connected synchronous generator has a synchronous reactance,...
A three-phase, 9,375 kVA, 13.8 kV, 4-pole, 60 Hz, Y-connected synchronous generator has a synchronous reactance, Xs = 17.9, and is connected to an infinite bus at rated voltage. If the rotational and electrical losses are negligivle, what is Ia, Ef, delta, theta, Tdrive, Phasor diagram, and power flow diagram (label completely with numerical values for, A) the machine as a generator; the prime-throttle is opened and If is adjusted so that the machine delivers rated kVA, 0.8 pf lagging,...
A balanced, symmetrical, round-rotor, 3-phase, 60 Hz, 2-pole, 100MVA, 13.8kV, synchronous generator is being driven at...
A balanced, symmetrical, round-rotor, 3-phase, 60 Hz, 2-pole, 100MVA, 13.8kV, synchronous generator is being driven at synchronous speed. During tests, an IFNL (field current required to produced rated terminal voltage under open circuit) of 150A and an IFSC (field current required to produced rated armature current under short circuit) of 100A were obtained. Use a linear model and neglect the armature resistance for the following calculations. a) What field current is needed to maintain rated terminal voltage when the generator...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT