Answered: Four identical alternators each rated…

Four identical alternators each rated for 20 MVA, 11 kV having subtransient reactance of 16% are working in parallel. The short- circuit level at the bus-har 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

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.21MCQ: In order to avoid difficulties with third-harmonic exciting current, which three-phase transformer...

See similar textbooks

Related questions

Q: The battery with a 1400 mAh can supply 2.8 Ampere current for: O 60 minutes O 30 minutes O 100…

A: Given- Battery capacity = 1400 mAh Supply current, I=2.8 A. To find- Time duration.

Q: Power Factor Correction Question 1: An alternator is supplying a load of 200 kW at 0.5 lagging. If…

A: An alternator is supplying a load, Active power, P1=200 kW At power factor, cosϕ1=0.5 lagging…

Q: Integrately design a 5-stage Voltmeter and 3-stage Ammeter using a galvanometer.

A: Integrately design a 5-stage Voltmeter and 3-stage Ammeter using a galvanometer.

Q: In a nonlinear circuit, the voltage source is…

A: “Since you have posted multiple sub parts,we will provide the solution only to the first three sub…

Q: 1- An FM modulator has a carrier frequency of 200 MHz, is frequency modulated by a sine wave signal…

Q: 1. Specify the Nyquist rate and the Nyquist interval for each of the following signals: (a) g(t) =…

A: In this question we need to find the Nyquist rate and Nyquist interval of the given signal.

Q: What is the purpose of C2? What happens if it is open?

A: Need to brief the purpose of the capacitor C2 and also need to explain what happens if capacitor C2…

Q: Q Asinusoidally modulated Am waveform isshow below! Determin: 1- The am Plitude of the carrier 16ut…

Q: R(s) G6 G₁ G₂ H₁ H₂ G3 G5 G4 C(=

A: Given Data: A block diagram model of a system having, Input =Rs Output =Cs To Find: Block diagram…

Q: A perpetual-motion machine is designed by including the electrical generator to the steam power…

A: An imaginary device which would produce work continuously without consuming any energy called a…

Q: A cylindrical resistor of length h is designed by ITU BEE by using two different conducting…

A: A cylindrical resistor of length h is designed by ITU BEE by using two different conducting…

Q: The magnetic moment for the circular loop with side a and current I is a. zero O b. πa2 | C. 2 al

A: Radius is given r =a. Current flowing is I A.

Q: Find V₁ and V₂ in the circuit below: 220° A ↑ V₁ = 5.2793 - j*5.4190 V₁ = 9.2793 - j*1.4190 V₂ =…

Q: Referring to the given circuit, what is ZTH (when RL is open) if R₁ is changed to 220 ohms? VS 0 Hz…

A: Circuit diagram is given as,

Q: The switch in the circuit below closes at time t=0, and a long time passes such that steady-state…

Q: 3. The role of mixer in the Armstrong modulator is to. a) raise the carrier frequency b) lower the…

A: Since you have posted the questions with multiple subpart and so we are supposed to answer 3…

Q: draw a simple circuit diagram to demonstrate, variation of Finger Adjust Preset 10K (a…

A: To draw a simple circuit diagram to demonstrate, variation of Finger Adjust Preset 10K (a…

Q: 35 V Το 2.5 Ω Req 12 Ω 6Ω 15 Ω 60 Ω 20Ω 80 Ω

A: The circuit diagram,

Q: 1. a) Find the average power, the reactive power, and the apparent power supplied by the source to…

A: To solve this question we need to convert the given circuit into phasor domain. Therefore we convert…

Q: 2. Synchronous Counter Using JK flip-flops (7473) and some external gates, design a synchronous…

A: Given Data: A sequence of, ⋯→3→7→4→0→6→1→3⋯ To Design: A synchronous counter using JK flipflop by,…

Q: The initial voltage across the inductor, and current running through the inductor, are both zero. If…

A: Given , to inductor initial current and voltage is zero . Inductor current for t >0 is…

Q: The carrier c(t)=5 cos (27 fc t) is frequency modulated (FM) by the signal m(t) = 5cos(2л10¹t),…

Q: Using Routh's stability criterion, determine the value of K at which the root loci cross the…

A: It is given that: s4+3s3+12s2+K-16s+K=0

Q: Find Z(s) for the circuit below using return difference techniques. 7202 ΖΩ 1H L ANS: Z(s) → 36(3s +…

A: For this given Circuit we need to find the Z(S)

Q: Explain proof very simply for fourth Maxwell equation?

Q: A step-up chopper is used to feed a load at 400 V de from a 250 V dc source. The inductor current is…

A: It is given that: Vin=250 VVo=400 VToff=20 μsec

Q: motor A 3-Phax 4 pole, Sota, 11 kv, SG supply a 3-phase, 11kV, 1500rpm S.M. if the syn. reactance is…

A: Given that a synchronous generator is driving a synchronous motor and given values of the system is…

Q: Expand the logarithm. Simplify if possible. log_(7)xy

Q: Question 3 For the following circuit, calculate the current on and the voltage dropped by each…

Q: ASAP please help me solve this by using block diagram reduction. I really need help and will give…

Q: Considering the four different responses recorded at different occasions to a step input of…

A: The given step responses are shown below. These 4 different step responses have been recorded for…

Q: 1. The NPN transistor in Figure P11.41 has BF 100 and the emitter junction is forward biased at V BE…

A: We need to find out the mode of operation of bjt and calculate the base ,collector and emitter…

Q: 4 (s+2) (s² +2s+2) (a) Draw the Nyquist plot of G(s). Calculate the real axis crossing. G(s) = (b)…

A: According to the question, for the given open loop transfer function, Gs = 4s+2s2+2s+2; We need to…

Q: Average active power in a Three Phase Circuit = W

A: Find the Average active power in a three-phase circuit.

Q: For the network below I=9A R₁ ww 10 Ω 마 units R₂80 Using superposition, find the voltage across, the…

Q: 3. Consider the voltage signal v(t) below as the reference. Express the voltage source in peak,…

A: In this question from the given waveform we need to find the voltage source in peak, peak-peak and…

Q: 10. A rectangular waveguide of internal dimensions (a = 4 cm and b = 3 cm) is to be operated in TE₁1…

A: The internal dimensions of the rectangular waveguide are given as, a=4 cm and b=3 cm. The given…

Q: Refer to the circuit below, What is lg? Assume R₁ is 4002 RG 800 EGI 12V www.11 O 0.175 A O 0.0783 A…

Q: Loop! +) 3.3A =212 22 www loopt SEIMO Toep 3 30.3262 -26V floop 4 0.80SA 30.22 Ź 9.3V

Q: The figure below on the left shows an armature controlled de servomotor driving a load through a…

A: The figure below shows an armature controlled dc servomotor driving a load through gear train:

Q: roblem 1 1. State the type of buses, known variables and unknown variables at each bus for the power…

A: Given Data: A single Line Diagram of, 3 Bus power system connecting 3 Transmission Lines To Find:…

Q: The NMOS and PMOS transistors have the following characteristics. The channel length is 350…

Q: Find (t) for t> 0 in the given circuit if the initial current in the inductor is zero. Assume /=…

Q: 1- The type of Frequency Modulation that its bandwidth similar to the bandwidth of DSB- AM signal is…

Q: G(s) = 4 (s+2) (s² +2s + 2) (a) Draw the Nyquist plot of G(s). Calculate the real axis crossing. (Do…

A: According to the question, for the given open loop transfer function, Gs = 4s+2s2+2s+2; We need to…

Q: Question 14 For C=0.012 µF, calculate the frequency (in unit of kHz using 2 decimal points) of the…

Q: What is the power factor angle θ of a load with a voltage v(t)=165cos(351t+(−10 ∘ ))and current…

Q: Determine the inductor current i(t) in the circuit shown in Figure.

A: Given: A network, To find: Inductor current i(t).

Q: Uim care si): the Vim - QV Then diock D₁ equivalent avranit 20 Vin BI VB=2V R₁ -Umm + 2 + Nout Vout…

A: Consider the below ideal diode; When VAK>0 Then the diode will be in forward bias (conducting)…

Q: Draw the equivalent parallel form of the following system. x[n] 0-0 LOK-OK yang

Concept explainers

Three-Phase Transformers

Three-segment transformers are a type of transformer used to transform voltages of electrical systems into three ranges. Two type transformers are shell-type transformer and core type transformer. In brief, it could be described because of the exquisite kinds of configurations.

Transformer

Ever since electricity has been created, people have started using it in its entirety. We see many types of Transformers in the neighborhoods. Some are smaller in size and some are very large. They are used according to their requirements. Many of us have seen the electrical transformer but they do not know what work they are engaged in.

Question

100%

02 Four identical alternators each rated for 20
MVA, 11 kV having subtransient reactance
of 16% are working in parallel. The short-
circuit level at the bus-bar is

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: Given data,

VIEW

Step 2: Solution:

VIEW

Solution

VIEW

Step by step

Solved in 3 steps

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

Three single-phase two-winding transformers, each rated 3kVA,220/110volts,60Hz, with a 0.10 per-unit leakage reactance, are connected as a three-phase extended autotransformer bank, as shown in Figure 3.36(c). The low-voltage winding has a 110 volt rating. (a) Draw the positive-sequence phasor diagram and show that the high-voltage winding has a 479.5 volt rating. (b) A three-phase load connected to the low-voltage terminals absorbs 6 kW at 110 volts and at 0.8 power factor lagging. Draw the per-unit impedance diagram and calculate the voltage and current at the high-voltage terminals. Assume positive-sequence operation.
Three single-phase transformers, each rated 10 MVA , 66.4/12.5 kV, 60 Hz , with an equivalent series reactance of 0.1 per unit divided equally between primary and secondary, are connected in a three-phase bank. The high-voltage windings are Y-connected and their terminals are directly connected to a 115-kV three-phase bus. The secondary terminals are all shorted together. Find the currents entering the high-voltage terminals and leaving the low-voltage terminals if the low-voltage windings are (a) Y-connected and (b) Δ- connected.
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?
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......
In large transformers, the total copper losses may vary from the rated output. % of 0.8 to 1.5 0.2 to 0.6 0.5 to 1 0.4 to 1
6. A 3 phase fault occurs at point F as shown in figure. Determine the critical clearing anglefor the system. The generator is delivering 1.0 p.u power under prefault conditio
For the same alternator the ratio of rated kva ,when connected as a three phase winding alternator to when connected as a single phase alternator(by utilising all the coils) is
The bus bars of a power station are in two sections A and Bseparated by a reactor. Connected in section A are two 12MVA generators of 15% reactance each and to B, 8 MVAgenerator of reactance 10%. The reactor is rated 8 MVA and15% reactance. Two feeders are connected to bus bar Athrough transformers, each rated at 4 MVA and 5% reactance.Determine the maximum short circuit MVA with which circuitbreakers on the outgoing side of the transformers have todeal.
7. An inductive load is shared by two identical synchronous generators A and Bequally, if the excitation of alternator A is increased. (a) Alternator A will deliver more current and alternator B will deliver less current. (b) Alternator B will deliver more current and alternator A will deliver less current. (c) both will continue to deliver same current. (d) both will deliver more current.
explain why Transformers are necessary in all stages of power distribution systems. Three-phase voltages may be stepped up or down by three-phase transformers
Transkrmers phase with each bank with - adjuste 35. Three single-phase transformers, cach of 100 kVA rating, are conected in a closed-delta arrangement. If one of them is taken out, it would be possible to load the bank in such a manner that cach one is loaded to the extent of: A 86.6 kVA C. 57.7KVA B. 66.7 kVA D. 33.33 kVA when load is at unity power factor. 36. Average power factor at which V-V bank separate is A 86.6% C. 66.67% В. 73.3% D. None of these 37. Scott connections are used for: A. single-phase to three-phase transformation C. three-phase to two-phase transformation B. three-phase to single-phase transformation (D Any of the above 38. The current in low voltage winding of a 25 kVA, 6600/400 V, 50 Hz, 3-phase Y-A transformer, at full load is: A 36 A Č. 65,32 A B. 20.78 A D. 40.2 A 39. The current in high voltage winding of a 20 kVA, 2200/220 V, 50 Hz, 3-phase A-A transformer, at full load is: (A. 3.03 A C. jo.5 A B. 5.25 A D. None of above 40. The current in low voltage…
The section bus-bars A and B are linked by a bus-bar reactor rated at 6000 kVA with 12% reactance. On bus-bar-A, there are two generators each of 10 MVA with 8% reactance and on bus-bar-B, two generators each of 6000 kVA with 10% reactance. Find the steady MVA fed into a dead short circuit all phases on B with bus-bar reactor in the circuit.