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 is it meaningful to consider two different surfaces

1. Is it meaningful to consider two different surfaces bounded by a closed path to computethe two different currents on the right side of Ampere's circuital law to find around the closed path? 2. Discuss briefly the appl ...

1 distinguish between centralized and decentralized p2p

1. Distinguish between centralized and decentralized P2P networks. 2. What are the advantages and disadvantages of a centralized P2P network? 3. What are the advantages and disadvantages of a decentralized P2P network? 4 ...

Load flow calculation -in the power network shown below

Load Flow Calculation - In the power network shown below, node 1 is the slack bus, where the nodal voltage is defined as (1.0∠0 o ) pu, nodes 2, 4 and 5 are load buses, and node 3 is a generator bus where the voltage mag ...

Consider a plane-strain square element with unit depth as

Consider a plane-strain square element with unit depth as shown in the figure. Use the St. Venant-Kirchhoff isotropic material model with two Lame's constants λ and μ. A uniformly distributed force T x  (force per area) ...

Lab 5 multisim1objectivestudents will be introduced to

LAB 5: Multisim 1. Objective Students will be introduced to National Instrument Multisim software for circuit design and analysis. You will conduct a DC operating point analysis simulation and you will use this to verify ...

1what is an electric dipole how is its strength defined2

1.What is an electric dipole? How is its strength defined? 2. What are the different kinds of polarization in a dielectric? 3. What is the polarization vector? How is it related to the electric field intensity? 4. Discus ...

1 learning outcomesat the end of this project students will

1. Learning outcomes At the end of this project, students will be able to: 1) Analyze power system faults based on balance and unbalanced faults techniques. (PLO4-CTPS-C4) 2) Express power flow analysis using EMTP softwa ...

Write the expression for the vector distance of a point in

Write the expression for the vector distance of a point in a rectangular room from one corner of the room, choosing the three edges meeting at that point as the coordinate axes. Describe the vector distance field associa ...

Suppose that a discrete-time system is described by the

Suppose that a discrete-time system is described by the frequency response Find the frequency response of an equivalent system whose frequency response has five terms of ejv in the numerator and six terms of ejv in the d ...

Assignmentpart 1 electricians tools1 which of the following

Assignment Part 1: Electricians' Tools 1. Which of the following types of symbols would be used on an electrical drawing for a large machine? A. Schematic symbols B. Blueprint symbols C. Pictorial symbols D. Wiring symbo ...

  • 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

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

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