Answered: EXPLAIN THE WORKING PRINCIPLES OF…

EXPLAIN THE WORKING PRINCIPLES OF SYNCHRONOUS ALTERNATOR IN ACCORDANCE WITH: a. Mechanical and Electrical Angle b. Frequency of induced EMF c. Synchronous Speed

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter11: Transient Stability

Section: Chapter Questions

Problem 11.8P

See similar textbooks

Related questions

Q: (a) The reactance's of the alternator during the periods of the subtransient, transient and steady…

A: Given : XL=0.15 ΩXD=0.24 ΩXF=0.44 ΩXa=0.7 Ω Step 1 : Calculate transient reactance Transient…

Q: 5. The field circuit of a 200,000W, 230V shunt generator is 8A when running full load at rated…

A: Efficiency should be calculated at half load; hence, the output power at half load is as follows:…

Q: A three-phase alternator, 20 kV, synchronous has a reactance of 10 Ω and a negligible resistance.…

Q: The terminal voltage of a 150 kW series generator is 600 V at rated load. Determine the generated…

Q: Describe the simulation of three phase induction motor

A: Three Phase Induction Motor: A three-phase induction motor is an electro mechanical energy converter…

Q: A 3-phase, 50 Hz induction motor has 8 poles. If the full load slip is 2.5 per cent, determine (a)…

A: Given: 3-phase induction motor having Frequency, f=50 Hz Number of poles, P=8 Slip, s=2.5%=0.025

Q: Calculate the synchronizing torque for one mechanical degree of phase displacement in a 6,019-kVA,…

A: Given:-KVA=6019f=50hzN=1500rpmXs=25%

Q: A 3-phase, 60 Hz, 6 pole alternator has an air gap flux which is sinusoidally distributed. The…

A: Given data, No. of poles=6 Frequency=60Hz No. of phases=3 Slots per pole per phase=5

Q: The reactance’s of the alternator during the periods of the subtransient, transient and steady…

A: An alternator/Synchronous generator is a type of electrical machine that converts mechanical energy…

Q: A three-phase star-connected alternator working at 1800 KVA,50 Hz,2100 V, has an armature dc…

A: Sycronous impedance = per phase voltage/per phase armature current. Voltage regulation =(internal…

Q: DESCRIBE THE FREQUENCY AND GENERATED EMF PRODUCE BY THE SYNCHRONOUS ALTERNATOR. and EXPLAIN BRIEFLY…

Q: How do you define "static stability limit of an alternator

A: The term stability refers to the ability of a system to be in stable condition even after occurrence…

Q: Q: In a long-shunt compound generator, the terminal voltage is 220 V when generator delivers 500 A.…

A: Given Data: Vt = 220 V IL = 500 A Rsh = 110 ohm Rse = 0.002 ohm Ra = 0.01 ohm

Q: (12) An alternator which is operating in parallel with other alternators at rated terminal voltage…

A: The solution is given below

Q: A 3-phase, star-connected alternator is rated at 15000 kVA, 11 kV. The armature resistance is I-5…

A: The solution is given below

Q: A three-phase Y-connected synchronous generator is rated 120 MVA, 13.2 kV, 0.8 PF lagging, and 60…

Q: 1) If speed of a synchronous generator decresed from 1800 RPM to 900 RPM the emf of one phase become…

A: In this question , we will solve synchronous machine speed related question , voltage regulation…

Q: Q3: Fill in the blanks with an appropriate word, when loading a three-phase induction motor, which…

A: "Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: 5. Why the efficiency of large size alternator should be larger than that of small size?

A: Because conducting material have wide contact with atmosphere in large size alternator, the heating…

Q: (a) With neat diagram explain the rotor of slip ring induction motor (b) Draw the circuit diagram…

Q: When the deviation between the stator and the rotor axis in a synchronous generator is measured to…

A: Synchronous generator The asynchronous generator is also called an alternator, it is an electrical…

Q: A three-phase star-connected alternator working at 1400 KVA,50 Hz,2100 V, has an armature dc…

A: impedance open circuited voltage at field currentshort circuited current at same field current.…

Q: the type of three-phase induction motor, which is used for high starting torque application a.…

A: In this we will write about induction motor used for high starting torque..

Q: discuss a) the frequency of an alternator. b)what is the disadvantages of split phase induction…

Q: what is the conclusion for the concepts of rotating amature and rotating field in an alternator?

A: There are two types of alternators are used one is rotating armature type and the other one is…

Q: 8. A 10-pole 25-cycle alternator is directly coupled to, and is dri synchronous motor. How many…

A: Given, An alternator has, Number of poles, Pa = 10 Frequency fa = 25 cycle= 25 Hz A synchronous…

Q: iii) A three-phase, 50Hz, 6-pole induction motor runs at 950 rpm. Calculate a) the synchronous speed…

Q: 9. The synchronous speed of a three-Phase induction motor depends on the number of magnetic poles in…

Q: Plot the external and internal characteristics of shunt generator

A: To plot the internal and external characteristics of the DC shunt generator. The external…

Q: The direct axis and quadrature axis reactances of a salient pole alternator are 1.4 per unit and 1.1…

Q: The reactance’s of the alternator during the periods of the subtransient, transient and steady…

A: According to question: Transient reactance is calculated as…

Q: Draw a single-layer, short-pitch (5/6), distributed lap-winding for a 3-phase, 4-pole, 48 slot…

A: Alternator:- Alternator is a machine which is used to convert the mechanical energy into the…

Q: The rating of a 3 phase synchronous generator is given as 2 MVA, 4200 V, 50 Hz. If the synchronous…

A: From the question The given MVA rating=2 MVA Line Voltage=4200 V Synchronous reactance Xs=2.6Ω We…

Q: The open circuit voltage is 14,000 volts of a 12,000 volts three- phase wye-connected turbo…

A: The solution is given below

Q: A 50-MVA, 30-kV, three-phase synchronous generator has a synchronous reactance of 8 Ohms/phase and…

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

Q: A 2-pole, 50 Hz, 3-phase, turbo-alternator is excited to generate the busbar voltage of 11 kV on no…

A: A synchronous generator's output of electrical torque includes synchronising torque. A magneto is an…

Q: A single phase, 2000 V alternator has armature resistance and reactance of 0.8 ohms and 4.94 ohms…

A: Given, A single phase alternator has V= 2000 V R= 0.8 ohms X= 4.94 ohms I= 100 A Power factor,…

Q: Discus

Q: Why the efficiency of large size alternator should be larger than that of small size?

A: In large size alternator heating losses are less because conducting material have wide contact with…

Q: The armature resistance of a 3 phase synchronous generator rated at 2 MVA, 4400 V, 60 Hz, If the…

A: We need find out armature resistance, we will find it by given information.

Q: Discuss the behaviour of an induction motor when it is rotating at synchronous speed.

A: Induction motor can't run at synchronous speed as the slip will be zero at synchronous speed. When…

Q: A 500-V, 50-kVA, 1-phase alternator has an effective resistance of 0.2 ohm. A field current of 10A…

A: A 50 KVA 1-phase alternator, Ra=0.2ohm,If=10A, Power factor=0.8 lagging, Ia=200A, V=450 V VPh=VL=500…

Q: What is the effect of the field excitation to the short circuit current of the alternator?

A: The short circuit current of alternator is given as: Ia=EfjXs Here we have neglected armature…

Q: The rotor winding current for a four-pole synchronous ac generator with a distributed rotor winding…

Q: The power supplied to a three-phase induction motor is 50 kW and the stator losses are 2 kW. If the…

Q: 6. The relation between the field current and the armature current in an alternator with the…

A: Field current - The field current is the current that is provided to a generator's or motor's field…

Q: Q5) discuss two only : a) the frequency of an alternator. b)what is the disadvantages of split phase…

A: Electrical machines can be either generator or motors. They can be either Ac machines or DC…

Q: 2. Design and draw a developed diagram/layout of a simple 2-layer Wave-winding for a 4-pole de…

A: DC generator- DC generator is a machine which convert mechanical energy into electrical energy of DC…

Concept explainers

Synchronous Generator

In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.

Salient Pole Rotor

Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.

Question

EXPLAIN THE WORKING PRINCIPLES OF SYNCHRONOUS ALTERNATOR IN ACCORDANCE
WITH:
a. Mechanical and Electrical Angle
b. Frequency of induced EMF
c. Synchronous Speed

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Similar questions

DESCRIBE THE FREQUENCY AND GENERATED EMF PRODUCE BY THE SYNCHRONOUS ALTERNATOR. and EXPLAIN BRIEFLY HOW YOU SYNCHRONIZE THE ALTERNATOR.
An 11 kV, three-phase, turbo alternator has a synchronous impedance per phase of(0,4 + j0,8) Ω and it supplies 2 kA at unity power factor to an infinite bus. Theexcitation is increased so that the emf is increased by 20%. Sketch a general loaddiagram and determine the following from this diagram: the armature current for maximum power output, the actual maximum power output
A 3-Phase 10Kva, 400 V, 50Hz star connected alternator supplies a rated load at 0.8 power factor lagging. If the armature resistance per phase is 0.5Ჲ and the synchronous reactance is 10Ჲ, using the e.m.f method, estimate the alternator’s voltage regulation
The effective resistance of a 2200 V, 50 Hz, 440 KVA, 1 -phase alternator is 0.5 ohm. On short-circuit, a field current of 40 A gives the full load current of 200 AS. The electromotive force on open-circuits with same field excitation is 1160 V. Then the synchronous impedance and reactance is _______ ohm and _______ ohm respectively.
Plot the short circuit characteristic of the three-phase synchronous alternator.
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 11 kV, 50 Hz, four-pole, star-connected alternator is being synchronised on an infinitebus. On the moment of synchronising, the excitation is such that the induced emf is 10%too low and the synchronising angle is 8° electrical leading. If the synchronous reactanceis 6 Ω/phase, determine the torque at synchronising. Mention the necessary assumptions.
A 500-V, 50-kVA, single-phase alternator has an effective resistance of 0.2 Ω. A field current of 10A produces an armature current of 200A on short-circuit and emf of 450V on open circuit. Calculate (a) the synchronous impedance and reactance and (b) the full-load regulation with 0.8 p.f. lagging.
Two 50-MVA, 3-phase alternators operate in parallel. The settings of the governors are such that the rise in speed from full-load to no-load is 2 percent in one machine and 3 percent in the other, the characteristics being straight lines in both cases. If each machine is fully loaded when the total load is 100 MW, what would be the load on each machine when the total load is 60 MW? (Req'd) Draw an appropriate diagram.
Determine the synchronising power and torque per mechanical degree of rotor displacement of a two-pole, 50 MVA, 11 kV, star-connected alternator, if the synchronous impedance is (4,181 + j39,78)%. The alternator operates at full load at a power factor of 0,8 lagging.
A three-phase, 318.75 kVA, 2300 V alternator has an armature resistance of 0.35 ohms/phase and a synchronous reactance of 1.2 ohms/phase. Determine the voltage regulation at full-load kVA, 0.8 power factor lagging and rated voltage.
Draw the schematic arrangement of diesel power plant