A 90-MVA 69.3-KV, three-phase synchronous generator has a synchronous reactance of 11 Ohms/phase and negligible armature resistance. The generator is delivering power to thebus bar at the rated voltage with its field current adjusted for a generated emf (excitation voltage) of 45 kv per phase and a power angle 8 = 13 degree.Thus, the delivered power isthe generator armature current isand the power factor is110.458 MW36.819 MW491 031 MWNone of these191.319 MW EHide bNG360 MidtermA 90-MVA 69.3-kv, three-phase synchronous generator has a synchronous reactance of 11 Ohms/phase and negligible armature resistance. The generator is delivering power to thebus bar at the rated voltage with its field current adjusted for a generated emf (excitation voltage) of 45 kV per phase and a power angle 8 = 13 degree.Thus, the delivered power isthe generator armature current isand the power factor is0.984 < 68.3 (KA)0.984 <-20.757° (KA)2.49- 68.3" (KA)2.49 <-20.757 (KA)None of these

In this question we need to find a power delivered by genrator, armature current and power factor

A 90-MVA 69.3-KV, three-phase synchronous generator has a synchronous reactance of 11 Ohms/phase and negligible armature resistance. The generator is delivering power to the bus bar at the rated voltage with its field current adjusted for a generated emf (excitation voltage) of 45 kv per phase and a power angle 8 = 13 degree. Thus, the delivered power is the generator armature current is and the power factor is 110.458 MW 36.819 MW 491.031 MW None of these 191.319 MW

A 90-MVA 69.3-KV, three-phase synchronous generator has a synchronous reactance of 11 Ohms/phase and negligible armature resistance. The generator is delivering power to the bus bar at the rated voltage with its field current adjusted for a generated emf (excitation voltage) of 45 kv per phase and a power angle 8 = 13 degree. Thus, the delivered power is the generator armature current is and the power factor is 110.458 MW 36.819 MW 491.031 MW None of these 191.319 MW

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Similar questions

A 60 MVA, 69.3 KV, three-phase synchronous generator has a synchronous reactance Xs = 15 ohm/phase. The generator is supplying its rated power (i.e. 60 MVA) to an infinite bus at 0.8 power factor lagging. Determine: a) The armature current Ia. b) The generator emf per phase (E). c) The power angle. d) The maximum power (P) that the generator can supply. Xs = j 150 la Vline = 69.3 KV
A short shunt compound generator has an armature,shunt field and series field resistances of0.02 ohm, 80 ohm and 0.03 ohm respectively. The generator’s induced emf is 510V when theterminal voltage is 500V. How much load current is delivered under this condition.
A 1MVA, 11 KV, three phase wye-connected synchronous generator has a synchronous reactance of 5 ohms and a negligible reactance per phase. At a certain field current the generator delivers rated load at 0.9 lagging power factor at 11 KV. For the same excitation, what is the terminal voltage at 0.9 leading power factor full-load?
A three-phase Y-connected synchronous generator is rated 120 MVA, 13.2 kV, 0.8 PF lagging, and 60 Hz. Its synchronous reactance is 0.9 Q, and its resistance may be ignored. (a) What is its voltage regulation? (b) What would the voltage and apparent power rating of this generator be if it were operated at 50 Hz with the same armature and field losses as it had at 60 Hz? (c) What would the voltage regulation of the generator be at 50 Hz?
A 200 MVA, three-phase, wye-connected, 60 Hz, 21 kV synchronous generator has negligible armature resistance and synchronous reactance of 2.5 2/phase. The field current is adjusted for a no-load excitation voltage of 20.5 KVLL and the generator is delivering 100 MW (a) Draw a neat and clearly labelled curve showing the relationship between the generator power output and the load angle. Calculate and show the maximum power and the operating power and load angle on your diagram. Poperating (MW) Soperating (9) PMAX (MW) (b) Use the power curve equation to calculate the machine load angle when it is delivering 150 MW and the excitation voltage is 30 kVLL. 8 (°) (c) Calculate the generator real and reactive power outputs when the excitation voltage is 150% rated and the load angle is 30°. P (MW) Q (MVAR)
SYNCHRONOUS GENERATOR A 13.8 kV, 50-MVA, 0.9 p.f., 60 Hz, four pole, Y-connected synchronous generator has a synchronous reactance of 2.5 ohms, and an armature resistance of 0.2 ohm. At 60 Hz, its friction and windage losses are 1 MW, and its core losses are 1.5 MW. The field circuit has a dc voltage of 120 V, and the maximum field current is 5A. The current of the field circuit is adjustable over the range from 0 to 10 A. The OCC of this generator is shown in the figure.
Which of the following is true in the phasor diagrams drawn according to the ohmic, inductive and capacitive operating states of the round pole synchronous generator a) Due to the voltage Efd, the excitation current is large in capacitive operation and small in ohmic operation b) Due to the voltage Efd, the excitation current is large in ohmic operation and small in inductive operation c) Due to the voltage Efd, the excitation current is small in capacitive operation and large in inductive operation. d) Due to the voltage Efd, the excitation current is large in capacitive operation and small in inductive operation.
synchronous generator threewThe phases are rated at 1000 kVA and operate at a voltage of 6.6 kV. The product resistance per phase is 0.38 ohms and the leakage reactance is 0.5 ohms per phase. The generator works to provide full load at a power factor of 0.85 delayed and at normal voltages. Find the value of the no-load voltage.
A 50-MVA, 30-kV, three-phase synchronous generator has a synchronous reactance of 8 Ohms/phase and negligible armature resistance. The generator is delivering 50 MVA at 0.8 pf leading to an infinite bus at the rated voltage. Determine the excitation per phase E and the power angle &. Select one: O a. E = 22.78 KV and 8= 15.67 deg. O b. E = 14.115 KV and 8= 25.85 deg. O c. None of these O d. E = 13.96KV and 8= 29.74 deg. O e. E = 27.47KV and 8= 22.84 deg. Impedances are marked in perunit on a 100MVA, 100 KV base. The load at bus 2 is S2= 16MW - 132 MVAR, and the load at EN ? 1:4 4/1- TOSHIBA
2.2 A three-phase synchronous generator has a reactance of 1.5 p.. and negligible resistance. It supplies a rated current of 1.0 p.. at 1.0 p.u. terminal voltage to a lagging load of 0.9 power factor. Determine the rated excitation voltage in p.u. and the internal load angle. Construct the performance chart of the generator in 2.1 (above) assuming its rating is 450 MVA.
A 50-MVA. 30-KV. three-phase synchronous generator has a synchronous reactance of 9 Ohms/phase and negligible armature resistance. The generator is operating with an excitation per phase E= 23.558 KV. and is delivering maximum power before losing synchronism (stability limit). Thus, the maximum generated power is Pmax = and the armature current is la = 4238 51.8 (KA) 2,446 51.85 (KA) None of these 3.248 36.32 (KA)
2.) A 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. Subject Electrical machine 2