# Principles and Design of O Grid Power Systems

Principles and Design of O Grid Power Systems 150 150 Affordable Capstone Projects Written from Scratch

ELEC3160 Principles and Design of O Grid
Power Systems
Assignment 3
Dynamic Simulation of the System
Due: Friday, Week 9, Semester 2, 2018
1 Introduction
The main assessment task in ELEC3160 is to design your own o grid power
system. This project will require you to essentially carry out three tasks:
1. identify energy sources on the site that may be able to be converted to
electrical energy;
3. select the sources and mix of sources which make the most ‘sense’ and;
4. Determine if the system will actually satisfy requirements in both steady
state and dynamically.
The three assignments in the course build skills to enable you to complete the
nal project.
The assignments have been given a nominal weighting to (a) encourage you to
develop the skills early and (b) to enable you to build up some marks progres-
sively to take some pressure of the project and the nal examination.
This assignment involves determining whether or not the system will be able to
operate within voltage and frequency limits or, in fact, remain stable. That is
be able to satisfy requirements in both steady state and dynamically.
This assignment involves a dynamic simulation of the system that you simulated
in Assignment 2 using Homer. The only variation is that you will need to add
1
an induction machine to your system. Homer is a steady state tool that gives
you a lot of information about the best mix of resources. It does not tell you if
the system will actually `work’.
In order to carry out the simulation you will need to model the generation
sources, storage and system loads. You can assume that the loads are resistive
and inductive with a power factor of greater than 0.9 lagging. The one excep-
tion is a direct on line start induction machine. The induction machine has a
power rating of 0.2 per unit of the peak generation capacity under worst case
conditions.
Worst case conditions are those when you have the minimum generation avail-
able.
You can theoretically use any dynamic system simulator available to you how-
ever, Synopsis Saber, MATLAB Simulink and Dymola Modelica are my pre-
ferred options as you should all be familiar with at least one of these packages.
My personal preference is Synopsis Saber as the models are easier to implement
and modify.
1. Model system components.
2. Model the system using the components.
3. Simulate the system in steady state.
4. Simulate the system under dynamic conditions to see what the eects are
especially under worst case conditions that is a direct on line start of the
induction machine with minimal generation available.
5. You are to write a brief technical report outlining your ndings.
(a) You must have a `proper’ report structure.
(b) The grammar and style should be appropriate.
6. You should submit the report via Turnitin on Blackboard.
You will have to make some assumptions and approximations when modeling
your system and its components. These should be clearly stated in your report.
3 Marks
The assignment is work 10% of your nal mark for the course.
Marks will be awarded as outlined in the Rubrick shown Table 1.
Note that the nal mark will be weighted by Task 1. That is,
M = 2
r
M1
50

nX=4
n=2
Mn:
Where,
2
Table 1: Marking Rubric for Assignment 3
40%)
D (40
50%)
C (50
70%)
B (70
85%)
A (>85%)
1. Carry
out the
simula-
tions with
induction
machine
50 Poor
attempt to
carry out
the
simulation
Not all
compo-
nents are
modelled
Simulation
does not
`run’.
Reasonable
attempt to
carry out
the
simulation
All compo-
nents
modelled
Simulation
runs and
`sensible’
results
obtained.
Simulation
has been
performed
properly
state
analysis of
results has
been
properly
carried
out.
Simulation has been
performed properly.
of results has been
properly carried out .
Dynamic analysis of
results has been
properly carried out.
2. Report
Structure
20 Poorly
structured
and
presented
Reasonably
structured
and
presented.
Good
structure
and pre-
sentation
Excellent
structure
and pre-
sentation
Outstanding
structure
and pre-
sentation
3.
Grammar
and style
20 Grammar
makes the
report
dicult to
Tense is
variable.
Spelling
mistakes
and poor
punctua-
tion.
Report is
easily
but has
tense,
punctua-
tion and
spelling
errors.
Well
written
with few
errors
Very well
written.
Clear with
few errors.
Easy to
Enjoyable.
4. Refer-
encing
10 None Cites some
sources.
Cites all
sources
and non
original
gures.
Cites all
sources
and gures
uses IEEE
style
Cites all
sources
and gures
uses IEEE
style. Uses
relative
referencing
through-
out
document.
3
M is the nal mark for the assignment
Mn is the mark for Task n
For example, if the mark for task 1 was 49% an dthe marks for tasks 2 to 4
added up to be 45 then the nal mark would be
M = 2 0:7 45 = 63
4

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