short-circuit study, the positive, negative, and zero sequence impedances are 0.25 pu, 0.25 pu, and 0.3 pu respectively. The base MVA is 100. Determine the fault current for a three-phase fault at the 115 kV level. A. 3,000 A B. 2,000

short-circuit study, the positive, negative, and zero sequence impedances are 0.25 pu, 0.25 pu, and 0.3 pu respectively. The base MVA is 100. Determine the fault current for a three-phase fault at the 115 kV level. A. 3,000 A B. 2,000

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

Chapter9: Unsymmetrical Faults

Section: Chapter Questions

Problem 9.2P

See similar textbooks

Related questions

Q: Figure Q2 shows the block diagram of a flight control system. a) Derive the system transfer…

Q: For circuit below if propagation Delay of each gate is 20 nsec, Octermine out put duration. A Timing…

Q: determine the oscillator frequency

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

Q: Calculate the operating frequency of a BJT phase- shift oscillator for R = 6 kN, C = 1500 pF, and Rc…

Q: Boit-Savart Law 7/21 • Exercise: Consider eircular filamentary wire located at the z 0, with a…

A: It is given that: Circular filamentary wire located at z=0Constant current=I

Q: Given the attached circuit, determine the currents I1 to I6 using Nodal Analysis

A: The nodes in the circuit are named and the reference node is chosen as shown below,

Q: 1. Determine the transfer function, TF for RC low-pass filter circuit of Figure 2. Vout 1 Hint : TF…

Q: 9V 2kn Find Voltage output and current? (diode is silicon) 8kn Vo 5V 5ka

Q: i literally said the no.3 not no.1

A: The inverting amplifier can be designed by using the tinkercad software.

Q: V dd Q1 Q2 Q5 Q3 A - Output Q4 Q6 B Write down the truth table for above logic gate with the ON /…

Q: 4. Determine Vo and Id for the series circuit. Si Ge •12 Vo 5.6 ka

Q: In the circuit shown below what is the output voltage (Vout) if a silicon transistor Q and an ideal…

Q: 1. Determine the resistance of a 1609-meter length of 12-gauge copper wire. Given: length = 1609…

Q: PETERMINE THE FOLLOWING CIRCUIT CHARACTERISTICS: 11=? 12 = 0.012A or 12mA 13 =? 14 = 0.018A or 18mA…

A: Brief description : For the given electrical circuit we need to derive the values of current &…

Q: c) A 75 MHz uniform plane wave having an electrical field amplitude of 12.5 V.m propagates in a…

A: Solution

Q: 15V 1A a 2 2A

A: This is a problem based on KVL and KCL. The calculation is shown in the next step

Q: A 50pF is connected in series with a coil having 5Ω resistance and 1.5mH inductance. The source…

Q: A 741-type op-amp has a gain-bandwidth product of 1 MHz. A non-inverting amplifier using this op-amp…

Q: As load p.f. of an alternator becomes more leading, the value of generated voltage required to give…

A: Consider the voltage drops in the synchronous generator are due to drops that occur in the armature…

Q: c) Why diodes should be connected in antiparallel with the transistors in inductive circuits? d) A…

A: Diode is uncontrolled Device in which their ON and OFF state is controlled by external circuit…

Q: A cell has emf 1.54 V when it is in series with 10 resistance; the reading of the voltmeter…

A: When no current in thee circuit the value of emf and terminal voltage are equal. The emf value…

Q: alculate the received power per square metre from a GPS transmitter that is 20 000 km above the…

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

Q: Determine V, I, Iz and IR for the network if R = 180 n. Rs 220 Ω IR Vz = 10 V 20 V RL VL Pzma = 400…

A: given here a zener diode based circuit and asked to determine the values of the VL , IL, IZ , IR…

Q: ?What is the value of R2 if the total current is 10A RI=4 ohm ? =R2 V= 120v R1 R2 V

Q: For a given sequence f[n], let g[n] = (-1)"f[n] and h[n] = 6[n]- f(n]. Flw) PART A) Derive G(w) and…

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

Q: Consider the following four systems where a 0. Ra you Ra you R yos Which of these systems is time…

A: A) y[n]=x[n]*h[n]+α+x[n] Clearly the system is non linear because if input x(n) is zero then…

Q: The Beta of a certain BJT is known to be approximately 194. How much base current (in microamperes)…

Q: ... Vcc = +16 V Ic Rc 3.9 kN. RB1 C2 62 kN C IB 10 μF + B V CE + B = 80 la 10 μF V BE E RB2 RE 20.68…

Q: What is the BJT DC Analysis?

A: DC Analysis of a Bipolar Junction Transistor Circuit Using Thevenin's theorem and Kirchhoff's…

Q: For the transistor circuit shown below, what is the value of the collector current?

A: The required parameter can be calculated by using DC analysis of the amplifier circuit.

Q: 14 2 30 Ω 3Ωξ 20 Ω a 27 N 50 n3 24 2 30 N 12 0 FIND THE VALUE OF RESISTANCE Rab Rab = OHM

Q: The amplifier composed of current source is shown in the figure. Please estimate the magnification…

A: Given Figure

Q: 2. Figure 2a below, shows an NPN transistor (B=200 used as a switch to control a green LED. A…

A: If base current of transistor is zero, transistor will be in off state.

Q: 1Chose the correct answer for the output F and G of the following circuit ( Assume that A= 10101010,…

Q: To answer the Prefinals Task 2 Please use the first picture as your reference guide..

A: Inverse Laplace: It is a mathematical tool. Laplace inverse converts the s-domain transfer function…

Q: Calculate VG, VS, /D, and VD +VoD = 15 V R, = 390 kn Rp = 1 kN Ioss = 10 mA VGS(of) = -4 V R2 100 kN…

Q: Answer one of the following A. What are the basic types of timers in PLC? B. What are the types of…

Q: Design an op amp circuit with inputs v1 and v2 such that v. = -5v1 + 3v2.

Q: che given circuit figure, if the voltage inputs V- and V+ are to be amplified by the same…

Q: 7. Using two multipliers with attenuation factor (k) and one op-amp, design a circuit having two…

Q: For the voltage-divider configuration of the figure below: a) Sketch the DC equivalent circuit b)…

A: Brief description: In the above given question they have mentioned a common source amplifier…

Q: Consider the circuit depicted in the figure shown below. This circuit is designed using a silicon…

A: Expression for output voltage can be find by using KVL . KVL states that algebraic sum of voltages…

Q: : which of these staten 3. The phase margin is the change in open-loop phase shift, required at…

A: In this question we will write about phase margin , discrete system stability and transfer function…

Q: Pwhat is the voltage across the R2 resistor RI=10 ohm R2=20 ohm R3=30 ohm v=120 volt R1 R2 R3 V.

Q: For the circuit shown in figure (3), determine the current and voltage for the resistor R3 using the…

Q: define rhombic antenna with diagrams and label

A: RHOMBIC ANTENNA: 1. A Rhombic Antenna is indeed a parallelogram-shaped antenna with equilateral…

Q: 2. Calculate the average value of the wave forms shown in Figure A. Use (1). Assume that each…

A: Given: Consider the following waveforms: To find: Calculate the average value of the waveforms…

Q: The terminal voltage of a battery is 13.5 v when 5 A current enters its positive terminal, but when…

A: This question belongs to circuit theory . It is based on the concept of EMF of battery and its…

Q: Iab is equal to 292.717∠52 and Ib is 169∠262, Ic should be please answer using electromagnetics…

A: In this question we will find current in c phase....

Q: A rectangular coil of area 0.1 m2 and with 100 turns is rotated with a frequency, f= 50 Hz in a…

A: Coil area A= 0.1 m2 Number of turns, N=100 frequency = f=50 Hz Magnetic flux density = B =0.1 T

Concept explainers

Fault Analysis

In an electrical engineering system, a fault is an abnormal electric current flowing through the system, and fault analysis is the study of these faults. For instance, a short-circuit is a fault where the live wire touches the ground or neutral wire. If a circuit is interrupted by a failure of a current-carrying wire then an open circuit fault occurs. The open-circuit faults are also called series faults. One or more phases or ground may be involved in a three-phase fault or may occur only between two phases. Current flows into the earth in case of a ground fault or earth fault. For most situations, the prospective short circuit current of a fault that is predictable can be calculated. To limit the loss of service because of a failure, the protective devices can detect fault conditions and operate circuit breakers and also other devices. All phases equally can be affected in a poly-phase system which is known as symmetric electrical fault. The asymmetric fault becomes more complicated to analyze if only some phases are affected. By using methods such as symmetrical components, the power system analysis of these types of faults is often simplified. The main objective of power system protection is to design, detect, and interrupt power system faults.

Question

In a short-circuit study, the positive, negative, and zero sequence impedances are 0.25 pu, 0.25 pu, and 0.3 pu respectively. The base MVA is 100. Determine the fault current for a three-phase fault at the 115 kV level.
A. 3,000 A B. 2,000 A C. 2,500 A D. 3,500 A

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

Step 2

Step 3

Step 4

Step 5

Trending now

This is a popular solution!

Step by step

Solved in 5 steps with 2 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

At a 220 kV substation of a power system, it is given that the three-phase fault level is 4000 MVA and single-line to ground fault level is 5000 MVA. Neglecting the resistance and the shunt susceptances of the system, (B) And the zero sequence driving point reactance at the bus is: (@)2.2Q (b) 4.84Q (€)18.18 Q (d)22.72Q
A short circuit occurs in the series R-L circuit with V = 20 kV, X = 8 ohm, and R = 0.8 ohm. The circuit breaker opens 3 cycles after fault inception. Determine (a)the rms ac fault current(???), (b)the rms “momentary” current(????), at ?=0.5cycle, which passes through the breaker before it opens, and (c)the rms asymmetrical fault current that the breaker interrupts.
In a short circuit test on 132 kV, 3-phase system, the breaker gives the following results: Power factor of the fault = 0.45. Recovery voltage 0.9 time of full line voltage. The breaking current is symmetrical. The restriking transient has a natural frequency of 15 kHz. Calculate the rate of rise of restriking voltage (RRRV) in the following types of faults: (1) Grounded fault (2) Undergrounded fault.
The magnitude of the fault current depends on the generator and fault impedance and ________________ . a. positive sequence impedance b. Zero sequence impedance c. Transformer impdeance d. Network impedance
In a short-circuit test on a 3-pole, 220 kV circuit breaker. Power factor of the fault = 0.8 Recovery voltage, 1.90 times (full line voltage) The breaking current was symmetrical the restriking transient had a natural frequency of 30000 c/s. Determine the average rate of rise of restriking voltage. (The natural is grounded and the fault involves earth).
Data obtained from a short circuit test on a 132 kV 3-phase circuit breaker with earthed neutral are as follows: -the power factor fault was 0.3. -the recovery voltage was 0.75 of the full line value. -the breaking current was symmetrical. -the restriking transient had a natural frequency of 1600 Hz. Estimate the rate rise of the recovery voltage. Assume that the fault is grounded.
A 30kV, 50MVA generator having a solidly grounded neutral and Z1 = 0.25pu, Z2=0.15pu and Z0=0.05pu. a. Calculate the fault current and voltages for a single line to ground fault. b. Sketch the phasor diagram for the fault voltages.
For the following single line diagram of a three-phase system, a three-phase fault occurs at point P and just before the fault the line voltage is 18 kV at P. Find out the transient fault current in pu and original value at point P. Take, the given kVA and kV of the G1 as the new base. Answer follow image.
a) Draw the sequence network and calculate the sub-transient fault current for a dead short circuit on one phase to ground at bus 4 with fault impedance j1.78 p.u for the system shown in Fig. The system data's are Machine 1: Xd”=j0.21p.u , X2=j0.4p.u; X0= j0.55p.u ; Machine 2: Xd”=j0.21p.u , X2=j0.4p.u; X0= j0.55p.u ; Transformers T1 and T2 : X1=X2=X0= j1.2p.u The transmission line reactance X1=X2= j0.21p.u and X0=0.97 p.u.
2. The positive, negative and zero sequence reactances of a 20MVA, 13.2 kV synchronous generator are 0.3 pu, 0.2 pu and0.1 pu respectively. The generator is solidly grounded andis not loaded. A line to ground fault occurs on phase a.Neglect all resistances, determine the fault current.
Figure 2 shows the circuit of a simple power system. The ratings of the generators, transformers and the motors are as shown in the figure. The reactance of lines 1 and 2 are 40 ohms and 50 ohms respectively. Assume that system is unloaded, and the generators are generating their rated voltage. Select the generator G₁ ratings as base values. Choose the fault location in bus 1 And give the below answers For a symmetrical three phase fault on the bus (a).Determine the Thevenin's equivalent circuit which can be used to calculate the fault current. (b) Calculate the fault current contribution from the generator connected to the bus on which you have selected for fault calculation
In a short-circuit test on a 3-pole, 110 kV circuit breaker. Power factor of the fault= 0.4. Recovery voltage= 0.95 times (full line voltage) The breaking current was symmetrical the restriking transient had a natural frequency of 15000 c/s. Determine the average rate of rise of restriking voltage. (The natural is grounded and the fault involves earth). Explain in details.