Answered: 1. A three-phase short-circuit fault…

1. A three-phase short-circuit fault occurs at point F in the system shown. Calculate the p.u. fault current using 30 MVA, 33 kV as base quantities. What is the actual fault current?

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 11.14P

See similar textbooks

Related questions

Q: n solar nuclear fusion, each time a proton fuses with another proton, this amount of energy is…

A: In nuclear fusion, one proton is fused with another proton with very high velocity and very high…

Q: (d) In the cicuit shown in figure 6 find the currents I, and 2, express your answer as phasors.…

Q: Suppose one ammeter probe is placed on the low side of a component and the other probe is placed on…

A: As per the guidelines given ,we can only provide the solution of one question in multiple type of…

Q: 3. What is the nominal value and tolerance of a resistor that has the color code of Red, Red, Brown,…

Q: 3. (a) Generate a system of equation by applying the node voltage law on the circuit below. (b)…

A: Let node voltage of nodes 1, 2 and 3 be V1, V2, V3 respectively.

Q: 18. This piece of equipment is the only instrument approved to test if a circuit is de-energized.…

A: The piece of equipment is the only instrument approved to test if a Circuit is de energized is a non…

Q: 2) (a) Calculate the voltage at which vo = vị for a CMOS inverter with K remember that ipn = ip.)…

A: CMOS inverter is a device which is used for generate logic function. it has a higher noise margin…

Q: In measuring settling time from step response with five percentage tolerance, the tolerance band…

A: Settling time (ts): The time taken by the step response to reach ( plus or minus 2%) to ( plus or…

Q: Q2) A- Draw only Mechanical characteristics of the following special motors (Torque /Slip): i-…

A: We are authorized to answer only 1 question at a time since you have not mentioned which question…

Q: 50 + 20 /-30)

A: We need to find out polar form

Q: An infinitely long cylindrical shell extending between r=2m to r=4m contains a non-uniform electric…

A: We need to find out electric flux density of given charge distribution

Q: (c) Find the currents /, and 2 in the circuit of figure 4 52 25V 40V 65V Figure 4

Q: what is the transfer function of a Potentiometer with a gain Kp Of 1,5 v/had 4. K, K a) Find Oc /0;…

Q: 3. Write the state equations and the output equation R(s) C(s) 8s + 10 54 + 5s3 + s2 + 5s + 13

A: In this question we need to write the state equation and the output equation

Q: 14. Severe burns, lung damage, eye damage, and hearing loss are all effects of what event? 8 am…

A: In this question we need to choose a correct option

Q: Use Superposition to solve for lo if R = 8, Vs 5, and Is 2. %3D

Q: 1. A group of dc motors is to operate at 220 volts at a place that is 400 ft away from 230-volt…

Q: what is the schematic diagram of tp4056 charger module

A: TP4056 charger: TP 4056 is an IC to charge the battery. It provides protection for only the charging…

Q: 5. For the circuit shown below: Rf +15 Ri Vout -15 a.) If Re=2 MQ and R; = 50 2, what is the voltage…

Q: 3. 54.4*10=40001Log, CaSNR)

A: In this question we need to find a SNR value

Q: homework multista Homework: Consider the circuit shown in Figure below with transistor parameters B…

A: The required parameters can be calculated by using DC and AC analysis of the cascaded amplifier.

Q: For main weinding, Vm = 23 V Im YA 60 w Vm Im (os Øm =60 60 23x4 (os Em =

Q: + 30 V Rc Rt るRE8.2Ke Find zi and zo and Av and Vo

Q: Create a circuit that will display the sum of two 4-bit binary inputs in 7-segment display. Display…

A: The seven segment display is a component made up of 7 different LED's setup in a unique…

Q: Design a feedback network of the phaseshift oscillator for a frequency of 3KHZ.{

Q: A wind turbine of the 3-bladed propeller type, having 50% efficiency, generates 2 MWe when the wind…

A: Writing the expression for power generated by turbine as follows:P=12ρAV3ηCpwhere,ρ=density of the…

Q: 2. Choose the values of Rp. Rs, and R for the JFET amplifier circuit of Fig. 3-11 that will result…

A: JFET: It is a semiconductor device, used as a transistor. It has three terminals and only one…

Q: 7. A three-phase, four-wire 150-V, CBA system has a Y- connected load with ZA = 6/0°n, z, = 6/30°n…

A: In this question we will find neutral current in 3 phase 4 wire system... Note : as per our…

Q: 50 ww 30 V 100 500 33 0 Rs: V P R10: V P R50: 1 V R33: 1 V ww

A: We need to find out current, voltage and power for given circuit

Q: Compute for Zo. Vcc = 12V. %3D oVcc 4.7 k2 1 ΜΩ B= 90 To=002 O 1 Mohms 4.7 kohms infinite 2.8 kohms

Q: What is the equivalent capacitance (in µF) between a and b?

A: The given capacitor network can be reduced by using the star to delta conversion.

Q: 7. What bleeder resistor is required to complete a voltage divider to give 300 v at 40 mA from a…

A: In this question we need to find a resistance of bleeder and potential difference

Q: Multiplexer Mux: Realizing a Logic Function Given the Truth Table for a 3-input XOR: 0 0 0 0 0 1 0 1…

Q: 2. Find i, and i, using Maxwell Analysis. 3i. 20 30 10 A 20 + ) 60 V

Q: a. Which operation(s) should be applied to the Image A below to obtain the Image B? Why?

A: By using arithmetic operationsThe important points of an operations:→If the result is a floating…

Q: 9. A transformer with a ratio of 12:1 has a primary current of 5 A. What is the secondary current?…

A: given here a transformer ratio is 12 : 1 and primary current is 5 A. here we have to find the…

Q: C= ax + 2ay - 3az and D= 4ax + 5ay-6az

Q: 13. An electromagnet in a generator has the ability to generate a variety of magnetic fields. O True…

A: An electromagnet in a generator has the ability to generate a variety of magnetic fields. Statement…

Q: 1- IF AX= -2000 and BL= 5, when IDIV BL get executed an error occur, error then justify your answer…

A: Given: If AX=-2000 and BL=5, when IDIV BL gets executed an error occur. To find: Fix this error and…

Q: t = 0 16 N i(t) 20 V 0.4 H v(t) 25 mF 9 2 etermine the inductor current i(t)

Q: 3. Determine the voltages 2A(t) 30. 0.9i 18 0

Q: 16- Find R seen by (C1, C2, C3 and CE) for the following circuits: Ht Voo Ht RI Rs Vs

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

Q: 9. The armature of a relay working on 200 V circuit operates when the current reaches 0.24 A. It is…

Q: The figure below shows five resistors and two batteries connected in a circuit. What are the…

Q: circuit shown, let Z,=604-30°Q, 1: For the Z2=24Z30°0 impedances, and the phase voltage be a…

Q: R2 + IR2 IRI A B to 35k2 R1 6kQ R4 RL 50V R3 14kQ Figure Q5(b)

A: We need to find out thevenin equivalent circuit.

Q: 252 502 1052 752 -12V

Q: Find the steady state current in the RLC circuits when R=18ohm ,L=1H,C=12.5×10^-3F and E = 820 cos…

Q: 15. A circuit has a power factor of 0.85 lagging. Th apparent power is 67VA. Find the real power in…

A: Given, Power factor, pf = 0.85 Apparent power, S = 67 VA

Q: j42 -j32 82 j5 2 30/0° V ( ww 52 10 2 -j22

Concept explainers

Thermistors

A thermistor is a special type of resistor whose resistance is more temperature-dependent than standard resistors. The resistance of the thermistor decreases with increasing temperature. This is the basic principle of thermistors. This allows the thermistor circuit to detect very small temperature changes that cannot be observed with the Resistance temperature detectors (RTDs) or the thermocouples. Since the resistance of a thermistor is temperature dependent, it can be connected to an electrical circuit to measure body temperature. This high sensitivity to temperature changes makes thermistors very useful for accurately controlling and calibrating temperature measurements. In general, resistance increases with increasing temperature in most metals, but thermistors react negatively.

Question

Need to validate my answers for item 1

1. A three-phase short-circuit fault occurs at point F in the system shown.
Calculate the p.u. fault current using 30 MVA, 33 kV as base quantities. What is
the actual fault current?
20 MVA ( G1
30 MVA
15 %
5 %
F
(3 + j15) Q
33 kV
10 MVA
G2
1:3
10 %

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 by step

Solved in 2 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

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.
Specify and select a circuit breaker for installation at a 20 000 V substation where the 3-phase fault level is 150 MVA, X = 2.67Ω, R = 0.13 Ω and C = 5 000 pF. A circuit breaker with 36 000 V rated maximum voltage, 6 kA rated short-circuit current, 2.15 rated voltage range factor and rated rate of rise of recovery voltage (RRRV) of 2.26 kV/μs is available in stock.
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
The 60 mile, 115 kV line GH (Figure P12.8) is operating with the voltages ateach end 30° out of phase when a three-phase fault occurs at 80% of the distance from bus G. This fault has 12 Ω arc resistance. The currents flowing tothe fault are as shown and are in per unit at 100 MVA, 115 kV.d. Determine if the zone 1 mho unit at H set for 90% of the line GH can operate for this fault. Assume that the angle of the mho characteristic is 75°.e. Describe how this three-phase fault can be cleared by the line distance relays.
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.
In a short circuit test on a 120 kV, 3 phase system, the breaker gave the following results: p.f. of fault 0.6, recovery voltage 0.9 times full line voltage, breaker current symmetrical, and restriking transient had a natural frequency 12 kHz. Determine average RRRV. Assume fault is grounded.
The 60 mile, 115 kV line GH (Figure P12.8) is operating with the voltages ateach end 30° out of phase when a three-phase fault occurs at 80% of the distance from bus G. This fault has 12 Ω arc resistance. The currents flowing tothe fault are as shown and are in per unit at 100 MVA, 115 kV.a. Determine the apparent impedance seen by the distance relays at G forthis fault.b. Determine if the zone 1 mho unit at G set for 90% of the line GH canoperate on this fault. Assume that the angle of the mho characteristic(Figure 6.12b) is 75°.c. Determine the apparent impedance seen by the distance relays at H for thisfault.
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 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).
Consider the one-line diagram of power system shown below; a) Develop equivalent circuit expressing all parameters in per unit values select Sbase= 100MVA b) Apply circuit reduction techniques and then find the net impedance(Zeq) at point of fault F2 c) Calculate fault level and 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
1-The following sequence currents were recorded in a power system under a fault condition Ipositive=j1.5pu, Inegative=–j0pu, Izero=– j0pu. The fault is a.Three-phase b.Double Line to ground c.Line to ground d.Line to line also if this case 2- he following sequence currents were recorded in a power system under a fault condition Ipositive=j1.5pu, Inegative=j0pu, Izero=j0pu. The fault is a.Three-phase b.Double Line to ground c.Line to ground d.Line to line i uploded the houndots (book )here :https://seomidea.com/hct/nu.pdf