EE521 Analysis of Power Systems
Autumn 2012
C. C. Liu
Final Project (Oct 31, 2012)
For this project, you should work in groups of 2 members. Please form the groups on your
own and inform Professor Liu and TA Junho Hong via email the names of each group
member.
The email about your group members should be sent on or before November 9, 2012.
A one-line diagram of a 5-bus power system is shown below together with the bus and line
data. The system will be referred to as Company A. Solve the following problems using the
PSAT software. The data in these files will define the “base case” of the power system. From
the base case, you will develop an application for Optimal Power Flow (OPF) using
MATLAB optimization tools.
0.99 PU
Bus 2
1.03 PU
5
4
1.00 PU
AVR ON
Bus 1
1.05 PU
520 MW
80 MW
40 MVR
0.88 PU
Bus 3
800.00 MW
280.00 MVR
Bus Data
Bus PU Volt
1
1.05000
2
1.00000
3
0.87580
Volt (kV) Angle (Deg)
15.75
-0.500
15.00
0.000
302.15
-21.256
Load MW Load MVR Gen MW
80.00
40.00
520.00
390.70
800.00
280.00
1
Gen MVR
238.94
26.16
4
5
1.02871
0.99196
354.90
342.23
Line Data (Base: 400 MVA)
From To Xfrmr
R
4
1
Yes 0.00300
2
5
Yes 0.00600
4
3
No
0.03600
5
3
No
0.01800
4
5
No
0.00900
-2.755
-4.495
X
0.04000
0.08000
0.40000
0.20000
0.10000
B
0.00
0.00
0.44
0.44
0.22
MVA Lim
1000.0
600.0
1200.0
1200.0
1200.0
Statement of Work
Task 1: Base Case Power Flow
Run the power flow for the given data set. Does the power flow converge? If yes, show the
results in a table. Otherwise continue the next task.
Task 2: Non-Convergence of the Power Flow
Increase the load at Bus 3 incrementally and run the power flow. At what point does power
flow stops to converge? Explain why.
Task 3: Develop an OPF application using MATLAB optimization tools, i.e., Linear
Programming or Non-Linear Programming.
Define the objective function(s) and operational constraints. Use the LP or NLP tools
available in MATLAB to develp an Optimal Power Flow (OPF) function. Test the OPF tool
to show it is working properly. THE OPF TOOL YOU DEVELOP SHOULD BE GENERIC
(APPLICABLE TO POWER SYSTEMS IN GENERAL) AND THEN APPLY TO THIS
SPECIFIC 5-BUS SYSTEM.
Task 4: Remedial Actions
Use the OPF tool you developed in Task 3 to determine the remedial actions you need to
bring the power flow condition in Task 2 (Non-Convergence) back to a SECURE state. For
N-1 security, you need to consider all 3 single line outgaes and 2 single transformer outages.
Task 5: Analysis and Reporting
Analyze the cases you obtained and draw your conclusions. How robust is your OPF software
for various scenarios? What are the applications of an OPF in power system operation?
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REPORT AND SCHEDULE
You need to submit a report that describes your work and the results for the project. Include
the appropriate one-line diagram for the simulation cases. You need to discuss the results you
obtain in detail; show the necessary technical backgound to support the results. The minimal
length of your report is 10 pages. Also, please include in the report a description of teamwork
in terms of individual contribution and coordination between the group members.
As indicated in the class schedule, you will need to give a brief presentation on your proposal
on Nov 13 or 15 during the class time.
The written report should be submitted on or before December 6, 2012. Send your report
together with the software code to Professor Liu <liu@eecs.wsu.edu> cc to TA Junho Hong
<jhong@eecs.wsu.edu>.
All groups will present the project results on December 14, 2012. Your presentations should
be sent to Professor Liu cc TA Junho Hong on or before December 12, 2012.
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