The p.u. impedance value of an alternator corresponding to base values of 13.2 kV and 30 MVA is 0.2 p.u. Then the p.u. impedance value of an alternator for the new base values of 13.8 kV and 50 MVA is......

The p.u. impedance value of an alternator corresponding to base values of 13.2 kV and 30 MVA is 0.2 p.u. Then the p.u. impedance value of an alternator for the new base values of 13.8 kV and 50 MVA is......

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

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.13MCQ

See similar textbooks

Related questions

Q: What are the typical power quality issues in the power system? What are the methods to mitigate…

A: The typical power quality issues in the power system are: Over voltage: Over voltage power increase…

Q: B: List the location and equation of Economical Number of Transformers operation of distribution…

A: Distribution system: Distribution system is the essential part of power system. It is used to…

Q: Describe the On-load and No-load in transformers

A: On-load in transformer Current flows through the secondary winding and out to the load when an…

Q: Loss of excitation is one of the stator faults of alternator which is operational at power station O…

A: 1)Loss of excitation is one of the fault on rotor. 2)Loss of excitation is a very common fault in…

Q: Determine the ripple factor and the average load current of the given circuit shown. Finalize answer…

Q: These transformers normally mounted on power poles or installed inside a large building near…

A: 1) Transformer is an electrical machine which step up step down the voltage without change in…

Q: explain the operating principle of single phase 2S-2P PMSM based on 3D design illustration.

A: According to the question, explain the operating principle of single-phase 2S-2P PMSM based on 3D…

Q: Describe the effects of harmonics on power distribution system.

A: Harmonics are the undesirable noises in the power distribution system.It usually occurs due to the…

Q: The _____________________ of transformers are neglected to draw the reactance diagram. a-Shunt…

A: This is based on the fill the blank The _____________________ of transformers are neglected to draw…

Q: For the same alternator the ratio of rated kva ,when connected as a three phase winding alternator…

A: For 3-phase operation of the alternator. Phase spread ψ=π3 So, Kd3ϕ=sinψ2ψ2=sinπ32π32=3π Let…

Q: Four identical alternators rated 10 MVA each has a per unit reactance of 0.20. These alternators…

A: In this question four identical alternators are connected on common bus bar...We have to find out 3…

Q: 4. An Open-Wye/Open-Delta transformer, as shown in Figure, is formed by two identical single-phase…

A: Step 1:- Part (a) Assume the 3-phase load is delta connected. Observe that between phase b and c an…

Q: Derive physically the reason of the phase shift in three phase transformer and show the phase shift…

A: The given problem can be laid down into parts. Firstly, the reason of the phase shift in the three…

Q: For type A chopper, dc source voltage = 250 V, load resistance = 10 Ω. Take a voltage excess of 2V…

Q: (c) Explain the losses of a real single-phase transformers.

A: In this question we will write about single phase transformer losses....

Q: Plot the short circuit characteristic of the three-phase synchronous alternator.

Q: Explain the conditions of parallel connection of alternators and how these conditions are fulfilled.

A: If the value of the power demand is large then, it is not possible to provide the power by using a…

Q: What are the advantages and disadvantages of Back To Back Test on Two Similar Single Phase…

A: When we require to test large transformer for determining their efficiency, temperature rise and…

Q: n 3-phase alternator, the change of terminal voltage from no load to full load is more in case of…

Q: The per-unit system calculations method allows to: Select one: O a. eliminate the need for explicit…

A: Most of human energy requirement is meet by generating electrical energy. Once electrical energy is…

Q: A-derive an equation for the copper saving in autotransformer. B- what are the disadvantages of the…

A: Given We need to derive the equation for saving of conductor in an autotransformer and we need to…

Q: A generating station has a maximum demand of 20MW,a load factor of 60%, a plant capacity factor of…

Q: If a 50 ohm quarter-wave impedance converter is used to match a 60 ohm transmission line to an…

Q: for the same alternator, the ratio of rated KVA when connected as 3-phase winding alternator to when…

A: For 3-phase connection of the windings, the phase spread will be ψ=π3=60o So, distribution factor…

Q: PROBLEM A 3300V/440V, single-phase transformer takes a no-load current of 0.8A and the iron loss is…

Q: Q1: What is the influence of transformer connections in single-phase transformers connected for 3-…

A: According to the Bartleby guidelines “Since you have asked multiple question, we will solve the…

Q: 1. Thyristor-Controlled Series Capacitor (TCSC) for power factor improvement 2. What are the…

A: Thyristor -Controlled Series Capacitor (TCSC) TCSC is a series compensation device connected to the…

Q: An alternator is at lagging power factor when it is normally excited O True False

Q: Given three phase fullwave with center tapped transformer with 220 Vac source voltage, determine:…

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

Q: As per the standards used in power system, even harmonics are limited to 25 percent of the odd…

A: The detailed answer is solved below according to the given parameters and instructions in the…

Q: explain why Transformers are necessary in all stages of power distribution systems. Three-phase…

A: Given: Transformer: Transformer is a static device used for the transfer of varying voltage and…

Q: For the same alternator the ratio of rated kva, when connected as a three phase winding alternator…

A: Solution: When connected to single-phase winding, Let the number of turn/Phase=N Phase Spread…

Q: Question - Compare the effect of varying resistance, capacitance and inductance in a pararllel and…

A: In this question Compare the effect of varying resistance, capacitance and inductance in a…

Q: 8. The governor droop characteristics of two 300 MW and 400 MW alternators appearing in parallel are…

A: For the given data frequency at which total load will be 600MW is determined

Q: The amplitude of the sinusoidal symmetrical AC component of the three-phase short-circuit current of…

A: The sinusoidal symmetrical AC component of 3-phase short circuit current of the machine is given as:

Q: Give the main parts (construction) of AC Generator (alternator). Define each.

Q: A 3-phase, 11 kV, 5 MVA alternator has synchronous reactance of 10 per phase. Its excitation is such…

A: Given a 3-phase, 11 kV, 5 MVA alternator has, Synchronous reactance, X=10 Ω Voltage, E = 11 kV…

Q: UDng a ITIe Core in high frequency transformers. c- Discuss, different applications of iron cores of…

A: C)For magnetizing or demagnetizing a iron material, some energy is expended. The energy expended…

Q: In order to improve the power factor of equipment operating at lagging power factor, a capacitor is…

A: In order to improve the power factor of equipment operating at lagging power factor, a capacitor is…

Q: Generate a conclusion on this following statements: Determine and analyze the voltage regulation…

A: GIVEN: resistive load inductive load capacitive load DETERMINE: the…

Q: The three phases of the alternator are mechanically spaced at equal intervals from each other, and…

Q: A 10 MVA three phase load is to be served by a three phase transformer at a line voltage of 13.8 kV.…

A: Transformer is the static device it is used to transfer the electrical power from one terminal to…

Q: in distribution transformers; What is 30 degrees phase shift in delta-star connection? What are the…

A: In the star-delta connection, the primary side of the transformer is in delta configuration while…

Q: What is phase angle of voltage induced in primary and secondary windings of transformers due to…

Q: EXPLAIN THE THREE-PHASE GENERATED EMF PRODUCED BY SYNCHRONOUS ALTERNATOR.

A: Let, Number of poles = P Synchronous speed of generator is Ns Flux per pole is ϕ Frequency of…

Q: Draw and explain the phasor diagram for two transformers in parallel

Q: Draw a complete circuit diagram of 1 phase synchronous alternator including the field excitation…

Question

Expert Solution

This question has been solved!

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

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Single Phase Controlled and Uncontrolled Rectifiers

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

The voltage regulation of an alternator having 0.75 leading p.f. load, no-load induced e.m.f. of 2400V and rated terminal voltage of 3000V is............... percent. *
What is the main direct cause of reactive power in AC system?A. Resistance of transmission linesB. Inductance and capacitance in the loadsC. Ideal transformer connected in the systemD. Power produced by generator
The reactance of a generator is given as 0.25 per-unit based on the generator’s of 18 kV, 500 MVA. Find its per-unit reactance on a base of 20 kV, 100 MVA. a. 0.0505 b. 0.0605 c. 0.0405 d. 0.0606
The reactance of a generator is given as 0.1 pu based on the generator of 17 KV, 300 MVA. Determine the pu reactance on a base of 17 KV, 250 MVA. New pu reactance is.......
A power transformer with standard insulation class of 69 kv will withstand an rms test voltage of A. 140 kv. B. 350 kv. C. 69kv. D. 440 kv.
An alternator with internal vallage of 125, p.u. and synchronous reactance of 0.4 p.u. is connected by a transmission line of reactance 0.1 p.u. c a synchronous meto having synchronous reactance 2.35 p u. and internal voltage of 0.85/6, p.u. If the real power supplied by the alternator is D 806 p... than (8, & is. degrees. (Round off to 2 decimal places) (Machines are of non-salient typa. Naglact resistances)
What is the relationship between primary induced emf( E1) and applied voltage (V1) of a Transformer? O a. Both are unequal and in phase O b. Both are unequal and 180 degree out of phase O c. Both are equal and 180 degree out of phase O d. Both are equal and inphase
In a transformer that has 10 times more turns on the secondary side (side 2) than on the primary side (side 1), the magnitude of the voltage/EMF across the windings on the secondary side, E₂ will be... O a.... 10 times lower than the voltage/emf on the primary side, E₁. O b.... the same as the voltage/emf on the primary side. O c.... always zero regardless of the voltage on the primary side, E₁. O d.... 10 times higher than the voltage/emf on the primary side, E₁.
Why rating of an Alternator is expressed in terms of VA,KVA or MVA ? Option 1: As losses are square times of the power factor Option 2: As losses depends on power factor Option 3: As losses are independent of power factor Option 4: As losses are inversely proportional to the power factor.
In the system shown in Figure 1, the transformers are connected star-star with both star points grounded and the generators are connected in star with thier star points grounded. The system base is 15 MVA. The transformers all have reactances of 0.04 p.u. on this 15 MVA base. The reactances of all other elements are given in Table 1 (in 2) and the voltage levels are given in Table 2. p.u. G1 p.u. T1 jö Per-Unit Convert all values to p.u. on a 15 MVA base. Xa= p.u. Xc₂= XL = V BABE G1 2 X 9 T3 Figure 1: A section of the distribution system T1 L Table 1: Sequence reactances (2) 3 G1 L G2 0.3 0.59 0.01 4 L 9/10 10 Fault Voltage What is the voltage at bus 3 (in Volts) after the fault has occurred? Vp= V T2 5 T2 34 10/4 Table 2: Voltage bases (kV) G2 4 T3 10/9 | G2 Fault Current A three-phase fault with a fault reactance of 0.01 p.u. occurs at bus 3. Calculate the fault current flowing at the fault point in KA. Ip=-j KA So
Alternator A (100 kVA, 3-f, 240 V, 60 Hz, 1800 rpm) is operating in parallel with alternator B (125 kVA, 3-f, 240 V, 60 Hz, 1800 rpm). The load of alternator A is 70 kW at 85% pf leading and the load of alternator B is 85 kW at 75% pf leading. Determine the pf of load.
Two 100-kW, single-phase transformers are connected in parallel both on the primary and secondary. One transformer has an ohmic drop of 0.5% at full-load and an inductive drop of 8% at full-load current. The other has an ohmic drop of 0.75% and an inductive drop of 2%. Show how they will share a load of 180 kW at 0.9 p.f.