UNSYMMETRICAL FAULT
ANALYSIS
T. HARIPRIYA
L-G FAULT
LINE TO LINE FAULT
DOUBLE LINE TO GROUNG FAULT
The symmetrical components of
voltages are given by
From the figure
Open conductor faults
The set of series currents and voltages in
open conductor fault

INDUCTANCE OF
TRANSMISSION LINES
Lecture 3
BITS PILANI HYDERABAD CAMPUS
LAST LECTURE
Transmission line
Inductance of a conductor :
Due to internal flux
Due to external flux
BITS PILANI HYDERABAD CAMPUS
2
POINTS:
The differential flux d in a tubular e

Summary of the earlier lecture
BITS Pilani, K K Birla Goa Campus
MATLAB code
Reference: Power System analysis
Haadi Saadat
BITS Pilani, K K Birla Goa Campus
LOAD FLOW STUDIES
Lecture-17,18
BITS Pilani, K K Birla Goa Campus
BITS Pilani, K K Birla Goa Campu

BIRLA INSTITUTE OF TECHNOLOGY AND SCIENCE, PILANI
INSTRUCTION DIVISION
SECOND SEMESTER 2013-2014
Course Handout
Date: 15/01/2014
Course No
: EEE C374/EEE F312
Course Title
: Power Systems
Instructor-in-charge : Haripriya T.
1. Scope and objective:
This co

EE 369
POWER SYSTEM ANALYSIS
Lecture 7
Transmission Line Models
Tom Overbye and Ross Baldick
1
Announcements
For lecture 7 to 10 read Chapters 5 and 3.
HW 6 is problems 5.2, 5.4, 5.7, 5.9, 5.14, 5.16,
5.19, 5.26, 5.31, 5.32, 5.33, 5.36; case study
questio

EE369
POWER SYSTEM ANALYSIS
Lecture 6
Development of Transmission Line Models
Tom Overbye and Ross Baldick
1
Homework
HW 5 is Problems 4.24, 4.25 (assume Cardinal
conductor and look up GMR in Table A.4),
4.26, 4.33, 4.36, 4.38, 4.49, 4.1, 4.3, 4.6; due
T

EE 369
Power Systems Engineering
Lecture 1
Introduction
Slides by: Tom Overbye, University of Illinois
With additions by Ross Baldick, University of Texas
Simple Power System
Every large-scale power system has three major
components:
generation: source

Part III. Magnetics
13
14
15
Basic Magnetics Theory
Inductor Design
Transformer Design
Fundamentals of Power Electronics
1
Chapter 13: Basic Magnetics Theory
Chapter 13 Basic Magnetics Theory
13.1 Review of Basic Magnetics
13.1.1 Basic relationships
13.1.

EE369
POWER SYSTEM ANALYSIS
Lecture 4
Power System Operation, Transmission Line
Modeling
Tom Overbye and Ross Baldick
1
Reading and Homework
For lectures 4 through 6 read Chapter 4
We will not be covering sections 4.7, 4.11, and 4.12 in detail,
We will

NEWTON RAPHSON METHOD
NEWTON RAPHSON METHOD for
nonlinear equation with single variable
A nonlinear equation with single variable can be expressed
as
BITS Pilani, K K Birla Goa Campus
NR METHOD FOR NON-LINEAR
EQUATIONS WITH MORE VARIABLES
BITS Pilani, K K

SYMMETRICAL FAULT
ANALYSIS
Topics to be covered
Introduction
Causes of faults
Consequences of faults
Types of faults
Symmetrical fault analyses
INTRODUCTION
3
The normal operating conditions of an electric power
system are occasionally disrupted because o

Short circuit of a synchronous
machine on no load
Under steady operation reactance offered by
the synchronous generator is given by
Xd = Xa + Xl.
When sudden short circuit occurs dc currents
enter into three phases.
Symmetrical short circuit is limite

Problem-1
A 50 Hz, 100 MVA four pole synchronous generator
has an inertia constant of 3.5 s and is supplying 0.16
pu power on a system base of 500 MVA. The input to
the generator is increased to 0.18 pu. Determine
The kinetic energy stored in the moving

Node Elimination Technique
BITS Pilani, K K Birla Goa Campus
BITS Pilani, K K Birla Goa Campus
Star-Delta Transformation
4
Steady State Stability
The ability of power system to remain its
synchronism and returns to its original state
when subjected to sm

SYMMETRICAL
COMPONENTS
UNBALANCED SYSTEM CAN BE
REPRESENTED BY BALANCED SYSTEM
USING SYMMETRICAL COMPONENTS
The three phase voltages ( or currents )
of unbalanced system are transformed
into three sets of balanced voltages ( or
currents)
are
called
Symmet

Problems
Problem-1
Figure below shows the spacing of a double circuit 3phase overhead line. The phase sequence is ABC and
the line is completely transposed. The conductor
radius in 13 cm. Find the inductance per phase per
kilometre.
Problem-5
Problem-4
S

Contents to be covered
Introduction
Power system stability
Dynamics of synchronous machine
The swing equation
Introduction
The increase in the demand for electric
power
coupled
with
resource
and
environmental constraints pose several
challenges to s

Transient stability
The transient stability of a system is concerned with the
study of system behavior for large disturbances.
The short circuits and switching heavy loads are treated as
large disturbances.
They are associated with large change in torq

Node Elimination Technique
BITS Pilani, K K Birla Goa Campus
BITS Pilani, K K Birla Goa Campus
Star-Delta Transformation
4
Steady State Stability
The ability of power system to remain its
synchronism and returns to its original state
when subjected to sm

EE369
POWER SYSTEM ANALYSIS
Lecture 3
Three Phase, Power System Operation
Tom Overbye and Ross Baldick
1
Reading and Homework
For lecture 3 read Chapters 1 and 2
For lectures 4 through 6 read Chapter 4
we will not be covering sections 4.7, 4.11, and 4.

Chapter 15 Transformer Design
Some more advanced design issues, not considered in previous
chapter:
n1 : n2
Inclusion of core loss
+
+
i1(t)
Selection of operating flux
v2(t)
v1(t)
density to optimize total loss
Multiple winding design: as in
the coupled-

Chapter 2
Principles of Steady-State Converter Analysis
2.1. Introduction
2.2. Inductor volt-second balance, capacitor charge
balance, and the small ripple approximation
2.3. Boost converter example
2.4. Cuk converter example
2.5. Estimating the ripple in

Chapter 6. Converter Circuits
Where do the boost,
buck-boost, and other
converters originate?
6.1. Circuit manipulations
6.2. A short list of
converters
How can we obtain a
converter having given
desired properties?
6.3. Transformer isolation
What conv

Chapter 4. Switch Realization
4.1. Switch applications
Single-, two-, and four-quadrant switches. Synchronous rectifiers
4.2. A brief survey of power semiconductor devices
Power diodes, MOSFETs, BJTs, IGBTs, and thyristors
4.3. Switching loss
Transistor s

Chapter 2
Principles of Steady-State Converter Analysis
2.1. Introduction
2.2. Inductor volt-second balance, capacitor charge
balance, and the small ripple approximation
2.3. Boost converter example
2.4. Cuk converter example
2.5. Estimating the ripple in

Chapter 4. Switch Realization
4.1. Switch applications
Single-, two-, and four-quadrant switches. Synchronous rectifiers
4.2. A brief survey of power semiconductor devices
Power diodes, MOSFETs, BJTs, IGBTs, and thyristors
4.3. Switching loss
Transistor s

Chapter 5. The Discontinuous Conduction Mode
5.1. Origin of the discontinuous conduction mode, and
mode boundary
5.2. Analysis of the conversion ratio M(D,K)
5.3. Boost converter example
5.4. Summary of results and key points
1
Fundamentals of Power Elect

Chapter 5. The Discontinuous Conduction Mode
5.1. Origin of the discontinuous conduction mode, and
mode boundary
5.2. Analysis of the conversion ratio M(D,K)
5.3. Boost converter example
5.4. Summary of results and key points
Fundamentals of Power Electro

Chapter 3. Steady-State Equivalent Circuit Modeling, Losses, and Efficiency
3.1. The dc transformer model 3.2. Inclusion of inductor copper loss 3.3. Construction of equivalent circuit model 3.4. How to obtain the input port of the model 3.5. Example: inc