A 50-MVA, 30-kV, three-phase synchronous generator has a synchronous reactance of 8 Ohms/phase and negligiblearmature 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 theseO 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 atEN ?1:44/1-TOSHIBA

According to the question we need to calculate the value of excitation per phase and power angle.

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 8. 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.

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 8. 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.

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

two synchronous generators are connected in parallel, feeding a load together. the frequency of the first generator in the no-load State is 52 Hz and the slope of the characteristic is 1 MW/Hz. the total power of the load fed by these two generators is 2.5 MW and the power coefficient is 0.6 inductive. by drawing the characteristic curve of the system;a) what is the frequency of the system when the load in question is fed, and how do the two generators share the load between themselvesb) if a load of 0.5 MW is added to the system, find the operating frequency of the new system and the powers given by each generatorc) if a second load of 0.5 MW is connected to the system, the idle operating frequency of the second generator is increased by 0.5 Hz, what happens to the operating frequency of the system and the power values given by the generators
What are the conditions in paralleling of these DC Generators:a. Shuntb. Seriesc. Compound
A synchronous generator runs at 250 rpm and generates at 50-Hz. There are 216 slots, each containing 5 conductors arranged in a full-pitched winding for 3-phase star connection. All the conductors of each phase are in series and the flux per pole at no-load sinusoidally distributed over the pole pitch is 30 mWb. Find the emf induced in each phase winding and the terminal voltage.
A long shunt compound generator delivers a current of 10A at 200V and has a series field resistance and shunt field resistance of 1 ohm and 200 ohms respectively. Then line current is a. 2A b. 1A c. 9A d. 10A
A synchronous generator runs at 250 rpm and generates at 50-Hz. There are 216slots, each containing 5 conductors arranged in a full-pitched winding for 3-phasestar connection. All the conductors of each phase are in series and the flux perpole at no-load sinusoidally distributed over the pole pitch is 30 mWb. Find the emfinduced in each phase winding and the terminal voltage.
Question (0) 5.39. The induced emf in a separately excited generator is 135 V at no load, while terminal voltage at full load is 115. What is its voltage regulation?
1.) A 6-pole, 3-phase, 60-Hz alternator has 12 slots per pole and four conductors per slot. The winding is 5/6 pitch. There are 0.025 Wb entering the armature from each north pole, and this flux is sinusoidally distributed along the air gap. The armature coils are all connected in series. The winding is wye-connected. Determine the open circuit emf per phase of the alternator. Subject Electrical machine 2
b) Two alternators are connected in parallel to feed a load together. The no-load frequency of the first alternator is 51.5 Hz and its slope is 1MW / Hz. The no-load frequency of the second alternator is 51.0 Hz and its slope is 1MW / Hz. The total power of the load fed by these two alternators is 2.5MW and the power factor is 0.8. Accordingly, at what frequency does this system work and what are the power values transferred to the load by each alternator.
A 6 pole wave wound d.c. shunt generator has 500 conductors. A generator delivers 50 kW of power at 250 voltage at full load. The resistance of the field circuit is 125 2. Actual brush shift is 10°. Then find the demagnetizing and cross magnetizing ampere turns per pole and how many additional turns must be wound on each pole to eliminate the demagnetizing effect.
d) The generated voltage of a turbine at timet seconds is given by: v(t) = Vssin(0.4nt +=) 61 Where Vs is generator voltage in Volts. Evaluate the following: The voltage of the generator after 2.5 seconds if Vs = 70 V. The voltage at time t = 0 seconds to 3 significant figures The time when the generator first reaches maximum voltage, the period, the frequency, and the time displacement. ii. iv. V. Your answer to this part of the task should be supported by suitably annotated graphical evidence to help understanding by a non-technical audience. e) If the cable of this generator has a shape of the form: y = 70cosh(x/55)sinh²( Provide fully explained solutions to the following: The value of y when x = 10 to 3 significant figures The value of x when y = 40 to 3 significant figures Provide fully explained graphical evidence to show justify your answers to part (ii) vi. vii. viii.
8. The terminal voltage of a 150 kW series generator is 600 v at rated load. Determine the generated emf if the armature and series field resistances are 0.04 2 and 0.06 n, respectively. a. 625V b. 655V c. 665V d. 675V
A synchronous generator is generating 395 V at 55 Hz at a field current of 3A. The e.m.f generated when the frequency is 35HZ and the field current is 2.3A is ..............