A generator is delivering power to infinite bus during post fault condition is 1.10 p.u at a power angle of 60 degrees. What is the maximum power that can be transferred? O a. 1.0 p.u O b. 1.1 p.u O c. 0.95 p.u O d. 1.27 p.u
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- two alternators A and B having 5% speed regulation are working in parallel at a station. Alternator A is rated at 15 MW while B is at 20 MW. When the total load to be shared is 12 MW, then how much of the load will be shared by the alternator B?A 3 phase, 60 Hz infinite bus bar is connected to two synchronous generators. Generator 1 has 12 poles and generator 2 is running at 240 rpm. Determine the speed of generator 1 and number of poles of generator 2.-The sum of the armature reactance and.............reactance is the reactance of the synchronous generator after the short circuit fault is cleared. -The selection of number of generating sources to meet the expected load is called as economic dispatch. Select one: True False
- Prepare a capacity outage Probability table for a 3 generator system with each having a capacity of 50MW. Forced Outage Rate for each unit is 0.05.Two identical 20 MW three-phase alternators operate in parallel. The governor of first machine is such that the frequency drops uniformly from 50 Hz on no-load to 48 Hz on full load. The corresponding uniform speed drop of the second machine is from 50 Hz to 47.5 Hz. How will the two machines share a load of 30 MW?A synchronous generator has 0.6 synchronous reactance. Load connected across terminal of generator is 500(kw) at 230(volt) with 0.8 lagging power factor. What is the magnitude of excitation voltage of generator.
- The symmetrical fault occurs in the terminals of the synchronous generator. Find the direct axis transient reactance of the synchronous generator under the transient period for the data given below, Leakage reactance(Xl)= 4.2 ohm, Armature reactance (Xad)= 8.8 ohm and field reactance (Xf)=2.6 ohm. a-8.60 b-5.50 c-6.21 d-2.01A 60-MVA, 69.3 kV, 3-phase synchronous generator has a synchronous reactance of 15 ohms per phase and negligible resistance. The generator is delivering rated power at 0.8 pf leading at rated terminal voltage to an infinite bus bar. Determine the magnitude of the power angle. Please give a clear solution and box the final answer Subject Electrical machine 2The rating of generator is expressed in terms of kVA Select one: True False
- In differential compound DC Generator the shunt field current and the series field current are in opposite direction Select one: True False For lap and wave wound generators the generated power is same. Select one: True FalseThe rotor of synchronous generator has two slip rings for DC supply Select one: True FalseA synchronous generator is connected through a transformer and a transmission line to synchronous motor. The rated voltage and apparent power of the generator serve as the base quantities for this power system. On the system base, the per-unit sub transient reactance of the generator and the motor are 0.15 and 0.40 respectively, the series reactance of the transformer is 0.10, and the series reactance of the transmission line is 0.20. All resistances may be ignored. The generator is supplying rated apparent power and voltage at a power factor of 0.85 lagging when a three-phase synchronous fault occurs at the terminals of the motor. Find the per-unit sub transient current at the fault, in the generator, and in the motor.