Power Systems  Basic Concepts and Applications  Part I
^{AIA HSW}
ShihMin Hsu, Ph.D., P.E.
This
program is registered with the AIA/CES for continuing professional
education. As such, it does not include content that may
be deemed or construed to be an approval or endorsement
by the AIA of any material of construction or any method
or manner of handling, using, distributing, or dealing in
any material or product. Questions related to specific materials,
methods, and services will be addressed at the conclusion
of this presentation.



PDH Online  PDH Center
5272 Meadow Estates Drive
Fairfax, VA 220306658
Phone & Fax: 7039880088
www.PDHonline.org
www.PDHcenter.com
An
AIA/CES Registered Continuing Education Provider (#J681)


Course Outline
A power system
is an interconnected network with components converting nonelectrical energy
continuously into the electrical form and transporting the electrical energy
from generating sources to the loads/users. A power system serves one important
function and that is to supply customers with electricity as economically and
as reliably as possible. This course should provide a brief review for readers
in the power engineering profession or serve as an introductory material for
readers in a nonpower engineering profession.
This course begins
with an introduction to power systems. It discusses the basic structure of power
systems, the fundamentals of AC circuits, mathematical notations, balanced threephase
systems, and per unit values. Then, it presents an overview of the three main
components of power systems: generators, transmission lines and transformers.
PART I of the course ends with the fundamentals of power factor correction and
its applications. PART II continues with symmetrical components and its applications
 short circuit calculations. Power flow problems are introduced and its solution
techniques are discussed. This material concludes with some fundamentals on
power system stability.
This course includes
a multiple choice quiz at the end.
Learning
Objective
Following successful
completion of three modules, the student should be able to:
 Gain a quick
overview of power systems;
 Have an idea
of a basic structure of power systems;
 Learn fundamentals
of AC (Alternating Current) circuits;
 Learn the balanced
threephase systems;
 Learn the definition
of the per unit values;
 Calculate the
per unit values from actual values;
 Calculate of
a new per unit value with changing voltage base and/or power base;
 Learn the representation
of waveforms for voltage and current;
 Learn phasor
presentations of voltage and current in AC circuits;
 Learn the definitions
of various powers in sinusoidal steadystate conditions;
 Distinguish
the difference between the wye and delta configurations in threephase systems;
 Learn the relationship
between the line voltage/current and phase voltage/current in wye configuration;
 Learn the relationship
between the line voltage/current and phase voltage/current in delta configuration;
 Understand the
concept of perphase analysis for balanced threephase systems;
 Calculate currents/voltages
in balanced threephase systems using perphase analysis;
 Learn the three
main components of power systems, namely, generation, transmission and distribution;
 Learn the equivalent
circuit of a synchronous generator in steadystate condition;
 Learn how outputs
of a synchronous generator change by varying one of the two main control variables;
 Gain the knowledge
of a generator reactive capability curve (Active power vs. Reactive power);
 Learn the equivalent
circuit of a transmission line;
 Learn the definition
of surge impedance loading (SIL);
 Understand the
characteristics of transmission line when the line loading is above or below
SIL;
 Gain the concept
of an ideal transformer;
 Learn the equivalent
circuit of a twowinding transformer;
 Learn the equivalent
circuit of a threewinding transformer;
 Calculate the
parameters of the twowinding transformer equivalent circuit;
 Calculate the
parameters of the threewinding transformer equivalent circuit;
 Calculate current
and voltage at various locations of a power system consisting generator, transfer
and transmission line under normal conditions;
 Calculate current
and voltage at various locations of a power system consisting generator, transfer
and transmission line under threephase (symmetrical) fault conditions;
 Understand the
relationship between complex power, active power, reactive power, apparent
power and power factor;
 Understand the
concept of power (PQ) triangle consisting of active power, reactive, apparent
power and power factor angle;
 Understand the
idea of power factor correction;
 Perform the
calculation of power factor correction for various considerations;
 Understand how
power factor correct reduces line loading;
 Calculate the
loading conditions before and after power factor correction; and
 Understand the
difference between leading and lagging power factor.
Course
Content
This course is part one of a twopart course on basic concepts
and applications of power systems.
Course Modules  PART I
Module #1: Introduction to Power Systems.
Module
#2: Basic Concepts  Components of Power Systems.
Module
#3: Power Factor Correction and its Applications.
The
course content is in PDF format in each module. You need to open or download
those documents to study this course.
References
[1]
Charles A. Gross, Power System Analysis  2nd Edition, John Wiley & Sons,
1986
[2] Arthur R. Bergen and Vijay Vittal, Power Systems Analysis  2nd Edition,
Prentice Hall, 2000
[3] Prabha S. Kundur, Power System Stability and Control, McGrawHill/EPRI,
1994
[4] "The IEEE Standard Dictionary of Electrical and Electronics Terms 
6th Edition," IEEE Std 1001996
Once you finish
studying the above course content you need to
take a quiz to obtain the PDH credits.
DISCLAIMER: The materials
contained in the online course are not intended as a representation or warranty
on the part of PDH Center or any other person/organization named herein. The materials
are for general information only. They are not a substitute for competent professional
advice. Application of this information to a specific project should be reviewed
by a registered architect and/or professional engineer/surveyor. Anyone making
use of the information set forth herein does so at their own risk and assumes
any and all resulting liability arising therefrom.