Distributed Power Systems

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Nov 24, 2013 (3 years and 6 months ago)

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Distributed Power Systems


ELCT 908


Instructor: Prof. Yasser G. Hegazy


Email: Yasser.higazi@guc.edu.eg

Office: C3, #319

The Course

1.
This course introduces IET students to an
important engineering topic that’s closely
related to their field in real life.


2.
Students learn electric power engineering
concepts and develop technical expertise in
this specialized field.


Power Systems



Power systems are responsible for generating
electrical power, transmitting this power and
then distributing it to customers at voltage
levels and reliability that are appropriate to
various users.


System Layout

Generation

Transmission

Distribution

Customer Service

Different Technologies

Extra High Voltage

Medium and Low voltage

Directions of Research


Power system analysis.


Power system planning.


Power system control.


Power system protection.


Power quality.


Load management.


Distributed generation.

Structure Of The Course

Modeling of system

Components

Three Phase and

Per
-
unit systems


System Analysis and

Control

System

Protection

Course Syllabus


Introduction.





[1 lecture ]


Modeling of Power system components.

[3 lectures]


The Per
-

unit system.




[1 lecture ]


Power flow analysis and control. [2 lectures]


Short circuit analysis




[2 lectures]


System protection




[1 lecture ]


Distributed Generation.




[1 lecture ]

Marking Scheme

Quizzes (Best 2 of 3)

10

Tutorial Assignments

10

Reports

15

Mid Term Examination

25

Examination and Lab. Final

40

Total

100

Schedule of Classes


Lectures: Tuesdays , 3
rd

slot in H10.




Instructor office hours every Sunday from 11:00 to
1:00 p.m.



Tutorials : Tuesdays , 5
th

slot in H10 .



References

1.

Electrical Energy Systems”, Mohamed El
-
Hawary, CRC Press 2000, ISBN 0
-
8493
-
2191
-
3.

2.
“AC Power Systems Handbook”, Jerry
Whitaker, CRC Press 1999, ISBN 0
-
8493
-
7414
-
6.

3.
Journals and Conferences papers.

Overview

What is a Power System
?




What is the function of the system?



Power system includes all parts of an electric

system power sources and customers
.

The Function of the system is to
generate

power ,
transmit

this
power and to
distribute

it to customers at voltage levels and
reliability that are appropriate to various users.

Thermal Power Station

Gas Power Station

Hydraulic Power Station


System Components



What are the main component of a power system?


Generation plants

HV Substations

Transmission Lines

Bulk power Substations

Distribution system

Single Line Diagram

Voltage levels


Generation: 1kV
-
30 kV


EHV Transmission: 500kV
-
765kV


HV Transmission: 230kV
-
345kV


Subtransmission system: 69kV
-
169kV


Distribution system: 120V
-
35kV

Overview


Power plants convert the energy stored in the fuel or
hydro into electric energy.


The energy is supplied through step
-
up transformers to
the electric network.


Power systems are comprised of 3 basic electrical
subsystems.


Generation subsystem


Transmission subsystem


Distribution subsystem

High Voltage Network


High
-
voltage networks, consist of transmission
lines, connects the power plants and high
-
voltage substations

in parallel.


This network permits load sharing among
power plants


The typical voltage of the network is between
240 and 700 kV.


The high
-
voltage substations are located near
the load centers.

Subtransmission Network


The subtransmission system connects the high
-
voltage substations to the distribution
substations.



The typical voltage of the subtransmission
system is between 138 and 69 kV.


In high load density areas, the subtransmission
system uses a network configuration that is
similar to the high voltage network.


In medium and low load

density areas, the
loop or radial connection is used.

Distribution Network


The

distribution

system

has

two

parts,

primary

and

secondary
.



The

primary

distribution

system

consists

of

overhead

lines

or

underground

cables,

which

are

called

feeders
.



The

feeders

supply

the

distribution

transformers

that

step

the

voltage

down

to

the

secondary

level
.


The

secondary

distribution

system

contains

overhead

lines

or

underground

cables

supplying

the

consumers

directly

by

single
-

or

three
-
phase

power
.


One Line Diagram