ECE 421/521
Electric Energy Systems
Power Systems Analysis I
Final Project
1
IEEE 39-bus (New
England) System
38
29
28
37
26
25
30
2
1
27
3
Equivalent of
39 NY System
4
9
17
8
18
7
31
21
22
19
13
6
24
15
14
5
16
11
10
32
12
33
35
20
34
Connecticut
Load Center
(CLC)
23
36
Tasks
• Task 1: Study three loading conditions:
– CLC load: 2000MW (base case)
– CLC load is scaled uniformly to 2400MW and 2800MW
• Task 2: Study the same loading conditions with line 8-9
out of service (N-1 scenario)
• Conduct the following study in each task:
1. For each loading condition, solve the optimal dispatch
for generators at buses 31, 32, 36, 37 and 38 with the
outputs of other generators unchanged.
• Consider generator limits of the dispatched generators
• Neglect transmission losses (balanced by the slack bus)
2. For each loading condition, solve power flows using the
optimal dispatch
• Bus 39 is the slack bus
• Use the N-R or F-D method (note: N-1 power flows
may or may not converge at 2800MW)
3. Using the power flow solutions from different loading
conditions, draw P-V curves in one plot:
• PCLC ~ |V8|, PCLC ~ |V4|, PCLC ~ |V14|, P34~|V4|
|V|
P
3
System Data
• Base-case power flow data in Excel or PSS/E version 30
– System Load: 9.3GW (CLC load: 2.00GW)
– Common bases: 100MVA, 1kV
• Fuel cost data on dispatched generators at 5 buses
Ci =ai 0 + ai1 Pi + ai 2 Pi 2
Pi (min) ≤ Pi ≤ Pi (max)
ai0
ai1
ai2
Pi(min)
Pi(max)
P31
200
4.92
0.00240
500
1000
P32
200
4.65
0.00250
500
1000
P36
300
4.21
0.00263
500
1500
P37
400
2.00
0.00333
500
1500
P38
500
2.22
0.00278
500
1500
4
Deliverables
1.
(50/55) MATLAB program that can automatically generate:
for each condition of tasks 1 and 2:
•
optimal dispatch results (listing λi and Pi of 5 generators and total cost Ct)
•
power flow solution (listing Vi, δi, Pi, and Qi, or reporting divergence)
for each of tasks 1 and 2,
•
P-V curves drawn in one plot
2.
(50/55) Project report (no more than 4 pages) with the following sections:
–
Project Requirements (brief statement on the system, data and tasks)
–
Project Results (tabular outputs from the MATLAB program as required in “1”)
–
Analysis on the Results
•
Conclusions or findings from each task
•
Comparison between the results of two tasks
Email the MATLAB code (m-file) and project report to me and GTAs by Dec 9 (Monday)
5
Others
• Grading:
– ECE 421 Students: 55+55 points
– ECE 521 Students: 50+50 points
• You may discuss with others but you should individually finish the project
• I encourage you to make YOUR code for the project using what you learned.
– It is ok to learn from the code with Saadat’s book and revise related code
for your program
– Your delivered program should be a stand-alone program with code only
for this project
• You may double check your results using a commercialized tool for
benchmarking purpose
– Powertech Lab’s PSAT
– Siemens PTI PSS/E
• You may schedule 10 min with me to go through your results in the week of
Dec 9 or AFTER you submit your deliverables
6
PSS/E 30 RAW Data Format:
Bus Data
Shunt capacitor in Mvar at 1pu voltage
1 – PQ bus, 2- PV bus,
3- Slack bus
|Vi| in pu
δi in deg.
7
PSS/E 30 RAW Data Format: Load Data
Pi
Qi
8
PSS/E 30 RAW Data Format: Generator Data
Pi
Qi
Qimax Qimin
9
PSS/E 30 RAW Data Format:
Branch Data
Rij
Xij
Bch
10
PSS/E 30 RAW Data Format: Transformer Data
Bus1 Bus2 Ratio XT
11
PSAT of Powertech’s DSA Tools
• Powertech’s DSA Tools are installed at server rd0.eecs.utk.edu
• Send ithelp@eecs.utk.edu a request for remote access if you cannot connect it.
12
Import power-flow data from a PSS/E RAW file
13
Solve Power Flows
14
Edit generation or load at a specific bus
15
Define a sub-system
Save as “Load Center”
for the sub-system
on the CLC region
Save as “Generation” for
the sub-system on 5
dispatched
generators
16
Edit load uniformly on a sub-system
17