Answered: B=6, so the feeder reactance is 16 %.…

B=6, so the feeder reactance is 16 %. Fig. Q2 shows a typical network of a small power station. Calculate the fault level at busbar C using 36 MVA as the base. The feeder reactance is 16 %.

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

Chapter7: Symmetrical Faults

Section: Chapter Questions

Problem 7.3MCQ: The amplitude of the sinusoidal symmetrical ac component of the three-phase short-circuit current of...

See similar textbooks

Related questions

Q: 2. A bolted short circuit occurs in the series R-L circuit of Figure I with V=18kV, f=50Hz,X=1092,…

A: The given circuit diagram is shown below: It is given that: V=18 KV=18×103 Vf=50 HzX=10 ΩR=1 Ω

Q: V1 120 V R1 20 R2 R3 + v2 110 V R4 32 0 R5 10Ω R6 20

A: KIRCHOFF'S CURRENT LAW:- The algebraic sum of every current entering and leaving the node has to be…

Q: Q20. The section bus-bars A and B as shown in Figure B5 are linked by a bus-bar reactors each rated…

A: The performance of a power system depends mainly on the performance of transmission lines in the…

Q: A power transmission line of 11kV (maximum) carries a maximum current of 200A is connecting the two…

A: Given: A power transmission line of 11kV (maximum) carries a maximum current of 200A is connecting…

Q: Q10-The full-load copper loss on the H.V. side of 100KVA, 11000/317 V, single-phase transformer is…

Q: The transformer (Es1=Es2=12V) is rated 220V:12V-0-12V and the average current through the load RL is…

A: The transformer is rated 220V:12V-0-12V The average current through the load RL = 400mA. F=60Hz Need…

Q: 64. A 50 Hz, 11 kV, 3-phase alternator with earthed neutral has a reactance of 5 ohms per phase and…

A: Given, A 50 Hz, 11 kV, 3-phase alternator with earthed neutral has Reactance = 5 ohms per phase The…

Q: A load voltage with flicker can be represented by the following equation Vload =…

Q: An industrial installation has a mains cable wired using a 70 mm2 V75 insulated three core copper…

A: In an industrial installation, The main cable is wired using 70 mm2 V75 insulated three core copper…

Q: For a system if the value of peak overshoot is 22 %, then the value of damping ratio Oi is

A: Peak over shoot pos = 22% = 0.22 Damping ratio Zeta

Q: A 60 Hz, 33 kV, 3-phase alternator with earthed neutral has a reactance of 7 ohms per phase and is…

A: We have an alternator with earthed neutral which is connected to a bus-bar through a circuit breaker…

Q: Q-3 A Cockcroft-Walton type voltage multiplier has ten stages with capacitances, all equal to 0.1…

A: Given, Cockroft walton generator with Vs=100kV n=10, I=5mA, C=0.1μF, f=60Hz 1)The percentage ripple…

Q: what is the use of DC/DC tension converter DC/DC booster MT3608

A: Types of mostly used DC DC Converter Step up Converter ( Boost converter) Step Down Converter (…

Q: A parallel connection of a RL branch with a C branch is connected across a 100V AC mains. At first R…

A: In RL parallel connection branch resistor and inductor are connected in parallel with each other and…

Q: 13. The transformer in a large welder provides single-phase ac output at 30 V, 50 Hz. An SCR bridge…

A: In this question we need to find a phase delay angle when the output voltage at load is 25 V and 8 V

Q: A generator operating at 50 Hz delivers 1 pu power to an infinite bus through a transmission circuit…

A: It is given that: f=50 Hz,Pm=1 p.u.,Pmax1= 2.0 p.u.Pmax2= 0.5 p.u.Pmax3= 1.5 p.u.

Q: A generator operating at 50 Hz delivers 1 p.u. power to an infinite bus through a transmission…

A: Given- frequency f=50 Hz, 1 p.u. power, Maximum power = 0.5 p.u. To Find- The value of δmax.

Q: Equal area criteria is a method used to calculate: Select one: O a. None of the answers O b.…

Q: Q4//A// Three 20 MVA generators, each with 0.15 pu reactance, are connected through three reactors…

Q: If 3-phase transfomer configuration in figure in has the givens as listed below: E-line on high…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts 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: For a system if the value of peak overshoot is 16 %, then the value of damping ratio o is

A: Peak overshoot= 16%

Q: A series circuit consisting of a 0.0795-henry inductor and a 177-microFarad capacitor is connected…

Q: An open loop system with unity feedbak has %OS OF 16%. What is its peak amplitude (Only give…

Q: design 800v to 14.5v isolated bi-directional dcdc conveter a. choose the converter type with reason…

A: It is asked design a 800 V to 14.5 V isolated ni-directional DC-DC converter.We need to choose the…

Q: In Fixed-bias configuration, the DC voltage across the Source terminal is equal to ____. a.Vgs b.0V…

A: For proper operation of FET we use different baising techniques . and one basic bias is fixed bias…

Q: 2. A 440 V, 3-phase, 50 Hz, 37-3 kW, star-connected induction motor has the following per phase…

Q: A 12 MVA, 132/6.6 kV, transformer having a reactance of 0.15 pu is fed from an infinite bus. The…

A: We will replace the components given in the circuit with per unit reactance respectively. The…

Q: QUESTION THREE A 3-phase full converter is fed from 3-phase, 230 V, 50 Hz supply having per-phase…

A: A 3-phase full wave converter is fed from a 3-phase source.The per phase source voltage is…

Q: A 6 ampere supply has a frequency of 25 Hz. Find the instantaneous value of current a. at 0.00986sec…

Q: Q5. For the following center tapped transformer, show the waveform across each half of the secondary…

A: An device which convert alternating signal in to pulsating direct signal. The half wave rectifier…

Q: Circuit breaker usually operate under A) after D. C. component has ceased B) transient state of…

A: Circuit breaker:- It is an electrical device which used as a switch for safety purposes. It protects…

Q: A parallel connection of a RL branch with a C branch is connected across a 100V AC mains. At first R…

Q: Q3) A 3-phase half-wave controlled supplies a resistive load of 100 2 from a 380V, 50 Hz supply.…

Q: Primary AC Source Transformer Secondary AC/DC Full-wave Rectifier Capaictor m Non- linear, Load…

A: The given circuit is shown below.

Concept explainers

Distribution System

The final stage in the delivery of the electric power is the electric power distribution system. From the transmission system to the individual customers it carries electricity. The distribution system is connected with the transmission system and is used to lower the voltage of the transmission to medium voltage in the range of 2 kV to 35 kV with the help of transformers. This medium voltage to the distribution transformers located near the customer's premises is carried by the primary distribution system lines. These distribution transformers in turn lower the voltage to utilization voltage used in lightings, household appliances, industrial equipments etc. Through secondary distribution lines often several customers are supplied from one transformer. It is through service drops, the commercial and residential customers are connected to the secondary distribution system lines. Customers who demand a larger amount of power can be connected directly to the primary distribution system level or the sub-transmission level.

Question

B=6, so the feeder reactance is 16 %. Fig. Q2 shows a typical network of a small power station. Calculate the fault level at busbar C using 36 MVA as the base. The feeder reactance is 16 %.

Busbar A
9MVA
(10 + B)%
Each generator : 18MVA, 25%
Im
36MVA, 30%
Busbar C
Fig. Q2
Busbar B

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

Step 2

Step 3

Step 4

Step 5

Step by step

Solved in 5 steps with 5 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

What are the poles according to their duties? What is a camper? What are the protection duties of surge arresters? to the linesWhat are the related concepts? What are the types of losses in diaelectric? In the detection of partial dischargesWhat are the non-destructive control methods? explain in detail
The one-line diagram of a simple power system is shown in Figure below. The neutral of each generator is grounded through a current-limiting reactor of 0.25/3 per unit on a 100-MVA base. The system data expressed in per unit on a common 100-MVA base is tabulated below. The generators are running on no-load at their rated voltage and rated frequency with their emfs in phase. G Stark Item Base MVA Voltage Rating X' x² 20 kV 20 kV 20/220 kV 20/220 kV 100 0.05 0.15 0.15 0.10 0.10 220 kV 0.125 0.125 0.30 0.15 0.25 025 0.7125 0.15 100 100 0.15 0.05 0.10 0.10 0.10 100 0.10 100 100 Lu La 220 kV 0.15 220 kV 0.35 100 A balanced three-phase fault at bus 3 through a fault impedance Zf= jo.I per unit. The magnitude of the fault current in amperes in phase b for this fault is: Select one: A. 345.3 B. 820.1 C. 312500 3888888 产产

Q3/ A/ Compare between de series and shunt generator. Q3/ B/ Briefly explain the commutating process in dc machine.
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 internal characteristics of DC shunt generator can be obtained from *
The figure below shows the one-line diagram of a four- bus power system. The voltages, the scheduled real power and reactive powers, and the reactances of transmission lines are marked at this one line diagram (The voltages and reactances are in PU referred to 100 MW base. The active power P2 in MW is the last three digits (from right) of your registration number (i.e for the student that has a registration number 202112396, P2 =396). [10] Starting from an estimated voltage at bus 2, bus 3, and bus 4 equals V2 (0) = 1.15<0°, V3 = 1.15 < 0°, V4 1.1< 0°. 1- Specify the type of each bus and known & unknown quantities at each bus. 2- Find the elements of the second row of the admittance matrix (i.e. [Y21 Y22 Y23 Y24]). 3- Using Gauss-Siedal fınd the voltage at bus 2 after the first iteration. 4- Using Newton-Raphson, calculate: |- The value of real power (P2), at bus 2 after the first iteration. Il- The second element in the first row of the Jacobian matrix after the first iteration. 2 P2…
Problem 2 Two shunt generators A and B operate in parallel and their load characteristics maybe taken as straight lines. The voltage falls from 240V at no load to 200V at200A, while that of B falls from 245V at no load to 220V at 150A. Determine the bus bar voltage when supplying 66.9KW load. How is the load divided between two generators?
In the field circuit model of a DC machine, a variable _____ is usually inserted in series with the field winding to vary/control the _____ that flows through that circuit. A resistor, voltage B resistor, current C inductor, current D inductor, voltage
2. When a large shunt capacitor is suddenly connected in parallel with the load bus in the distribution feeder, what would happen to this bus current? O A. Increase B. Decrease D. None of Above
(8) Q2. Correct the wrong sentence if you find it in only (all) of the following sentences: ual and same direct 1) T1 Porto at e Tated current med on low vo "aly mmf:. the. ideal trout -side. copper loss is not a vy ne vau and 10au. 12) Shunt field winding have a large number of turns compared with a series field winding. 13) The voltage regulation of generator A is 10% and that of generator B is 5%. The A is better than generator B. generator poTOTIS Us. 10 Un 14) The external characteristic of a dc generator is affected by armature reaction. 15) The commutating poles or interpoles is connected in parallel with the armature. 16) The de motor should be started by impressing its rated voltage across the armature terminals. at 17) The cumulative compound motor has the advantage of over a series Motor. 18) The torque in a differential compound motor increase and its speed is decreased with an increase in the armature current. 19) The flux in a machine does not vary with time. 20) After…
9.09 The flux density distribution in the air-gap of a certain generator is such that it contains a fundamental, a third harmonic, and a fifth harmonic. The flux per pole due to the fundamental distribution is 9 x 10-3 weber, that due to the third harmonic distribution is 0.9 x 10-3 weber, that due to the fifth harmonic distribution is 0.4 x 103 weber. There are four armature slots per phase per pole, the connection are made for three-phase wye. and the coil pitch is 12/15. The frequency is 60 cycles and the generator has 4 poles. (a) Calculate the emf/turn. (b) If there are six turns/coil and two coil sides/slot, calculate the emf per phase. (c) Calculate the emf between line terminals. Ans. 2.32V; 212V; 364V
10. What is the angle of lead ? (DC GENERATOR QUESTION)