Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Electrical & Electronics Expert

A three generator power supply system is connected to a bus network operating at a common voltage of 220 kV. The network is shown in first Figure below.

The neutral of each generator is grounded through ay'0.065 p.u. reactor. The generators are not loaded and are running at rated frequency and voltage. The system sequence impedance data on a common base of 220 kV and 100 MVA are given in Table Qla. A double line to ground fault occurs, between the phases detailed in Table second and ground, at the bus shown in first Figure, through a fault impedance ofy'0.085 p.u.. Assuming the prefault bus voltages as 1 p.u., find out

a) The 9x9 admittance matrices for the zero, positive and negative sequence circuits;

b) Zkk for each of the zero, positive and negative sequence, where k is the number of the bus on which the fault occurs.

c) The fault current;

d) The current delivered during the fault by the generator detailed in second Table ;

e) The voltage at the bus detailed in second Table during the fault; and

f) The current in the line detailed in second Table during the fault.

Software that may be used is Matlab, Mathematica or Excel.
The format of file names submitted is to be as follows:

"StudentName StudentNumber.file extension'

2107_Power system.jpg

Table: Power system parameters

1425_Power system parameters.jpg


Table
               Fault       b) Generator       c) Bus d)       Inter bus
Name        phases    current               voltage         current
Bari           a, b           2                        1               5,6

Q2 A single phase transmission line consists of 5 conductors as shown Figure below.

1756_Transmission line.jpg

Conductors A1 to A3 are solid with a radius of 2.0 cm each and conductors B l and B2 are the return conductors, which are also solid, with a radius of 2.5 cm each.

A good approximation for the inductance of the circuit is given by

L=μ0/2π =ln GMD/GMRA0/2π InGMD/GMRB.

The inductance so find outd is predicated on equal current distribution in the A conductors and in the B conductors. Starting with Equation

1971_Inductance.jpg

find out a more accurate value for the inductance that does not rely on this assumption and hence find out the current distribution within each of the A and B conductors. State any assumptions made and the justification for the assumption.

The circuit is not transposed and the effects of earth may be neglected. The current may be assumed to be uniformly distributed throughout the conductor, i.e. skin and proximity effects may be neglected.

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M91597

Have any Question? 


Related Questions in Electrical & Electronics

1 discuss how the solution for the electromagnetic field

1. Discuss how the solution for the electromagnetic field given by (4.52) corresponds to that of a uniform plane wave. 2. Why is the quantity known as the phase constant? 3. What is phase velocity? How is it related to t ...

Download the matlab program ofdmallocm which simulates

Download the MATLAB program "ofdm_alloc.m", which simulates power and bit allocation for a 64 channel OFDM system, assuming that all channel symbol streams have equal power allocation P k = E [|s k [m]| 2 ] = 1, and that ...

1 find the minimum value of h for which the gate shown

1. Find the minimum value of h for which the gate shown will rotate counterclockwise if the gate cross section is (a) rectangular, 4 ft × 4 ft; (b) triangular, 4 ft at the base × 4 ft high. Neglect bearing friction. 2. A ...

What are the two impairments caused by windowing what

What are the two impairments caused by windowing? What window characteristic is most related to each impairment? How is the effect of each impairment reduced? Can either window impairment be entirely eliminated? Explain ...

1 find the velocity with which the group of two frequencies

1. Find the velocity with which the group of two frequencies 2400 MHz and 2500 MHz travels in a parallel-plate waveguide of dimension a = 2.5 cm and having a perfect dielectric of 2. For a narrow-band amplitude modulated ...

Suppose that a discrete-time system is specified by the

Suppose that a discrete-time system is specified by the transfer function Compute and plot a. The step response of the system b. The impulse response of the system c. The response of the system to the input signal

Determine if the filters with the following transfer

Determine if the filters with the following transfer functions are physically realizable. If they are not realizable, explain if and how they can be approximately realized. Be as specific as possible. (c) H(ω)=2πδ(ω)

1 define wavelength how is it related to the phase

1. Define wavelength. How is it related to the phase constant? 2. What is the relationship between frequency, wavelength, and phase velocity? What is the wavelength in free space for a frequency of 15 MHz? 3. What is the ...

Tasks1learn how to use opendss2open and execute the epri

Tasks 1. Learn how to use OpenDSS 2. Open and execute the EPRI Test Circuit 24 model 3. Develop base case data sets of bus voltages and power flows 4. Provide analysis of the base case model: a. Feeder voltage profiles b ...

1 state amperes circuital law2 what are the units of the

1. State Ampere's circuital law. 2. What are the units of the magnetic field intensity vector? 3. What are the units of the displacement flux density vector? 4. What is displacement current? Give an example involving dis ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen