Download Analysis and Simulation of Bus Loading conditions on Voltage Sag

AEEE 170– Freshman Electrical
Engineering
Programme of Studies:BSc in Electrical Engineering
Entrance requirements: None
Number of ECTS credits:5 (Average student working time:
125 hours)
Lecturer: Dr. Alexis Polycarpou,
Frederick University, Cyprus
Telecommunications

Telecommunication is the transmission of messages, over
significant distances.

In the modern age, telecommunications has typically involved the
use of electric means such as the telegraph, thetelephone, and the
teletype, the use of fiber optics and their associated electronics,
and/or the use of the internet..

These systems of communications all required the use of
conducting metal wires
Control Systems Engineering

Applies control theory to design systems with
predictable behaviors.

The practice uses sensors to obtain measurements used
to give feedback to the input actuators that can make
corrections toward desired performance

When a device is designed to perform without the need
of human inputs for correction it is called automatic
control.
Electronics Engineering

Uses the scientific knowledge of the behavior and
effects of electrons to develop components,
devices, systems, or equipment
Power Engineering

Deals with the generation, transmission and distribution
of electric power as well as the electrical devices
connected to such systems including generators, motors
and transformers.

Concerned with the problems of three-phase AC power
and conversion between AC and DC power as well as the
development of specialized power systems such as those
used in aircraft or for electric railway networks.
Basic Quantities

Voltage is a representation of the electric potential
energy per unit charge.. In other words, it is a
measurement of the energy contained within an
electric field, or an electric circuit, at a given point

Electrical current is a measure of the amount of
electrical charge transferred per unit time. It
represents the flow of electrons through a conductive
material.

Electrical resistance of an object is a measure of its
opposition to the passage of a steady electric current.
An object of uniform cross section will have a
resistance proportional to its length and inversely
proportional to its cross-sectional area, and
proportional to the resistivity of the material.
Prefixes:
Number Prefix Symbol
10
-1
deci-
10
-2
centi- c
10
-3
milli-
10
-6
micro-
10
-9
nano- n
10
-12
pico-
10
-15
femto- f
10
-18
atto-
10
-21
zepto- z
10
-24
yocto- y
d
m
p
a
Rarely used
Number Prefix Symbol
10
1
deka- da
10
2
hecto- h
10
3
kilo-
10
6
mega- M
10
9
giga-
G
10
12
tera-
T
10
15
peta- P
10
18
exa-
E
10
21
zeta-
Z
10
24
yotta- Y
k
Ohms Law
V  I R
I=?
V
I
R
Questions?