1. Accurate Fault Location Using Modeling and Simulation
Dr.Mladen Kezunovic and Dr. Ali Abur
Status
User interface is developed
Static system model is tuned under the situation of no additional field data available
Testing using fault cases and a new version of software is completed
Design and user document is developed
Process of Converting PSS/E data into CAPE is initiated
Future work
Completing process of converting PSS/E data into CAPE is initiated
Investigating software performance with CAPE data
Customizing the software so that it can be used with CAPE
Finishing the Final report A
Central
Office B C D E F
Communication link
(DFR Data)
Transmission line
DFR
Substation
Fault
Unsynchronized phasors and pre-fault breaker status
Tuning static system model
Apply the GA
Obtain a list of faulty branch candidates
DFR Assistant
DFR raw data
DFR data COMTRADE format
Faulty branch and fault type
Interpretation file
Information file entered by the user
System model file in PSS/E format
PSS/E Short Circuit
Program
Output:
Fault location and fault resistance
PSS/E Load Flow Program
DFR data synchronization
OBJECTIVE
ESTIMATING THE FAULT LOCATION FOR THE CASE WHERE ONLY DATA FROM DFRs SPARSELY LOCATED AT SUBSTATIONS ARE AVAILABLE
SOFTWARE TESTING USING FAULT DATA COLLECTED FROM DIFFERENT UTILITY SYSTEMS
EVALUATING THE PERFORMANCE OF FAULT LOCATION SOFTWARE
Load power updated by the user
Line data updated by the user
Test report
Interface
Fault data inputted by the user
Generator power updated by the user
Tuning static model
Obtaining the bus numbers of all monitored substations
Picking the minimum fitness value and obtaining corresponding index of updated model
Obtaining a list of the parameters for selected system model
Save the selected model
Convergent?
End
Obtaining the generator bus number in the substation based on the above information
Using a specified “search depth” to obtain a list of the load bus numbers
Obtaining the generator parameters by invoking the IPLAN program “gen_loadbus.irf”
Tuning the selected generators and loads data based on a specific strategy
Calculating load flow using updated system model
Calculating the fitness value using N
Generating enough models?
Test results
Case #
DFR Files Utilized
Old
Result
New
Old |Error|
(miles)
New |Error|
Quantities
matched 1
Event 676
Event 680
and 50.0% from 4211
and
5.6% from 4211
0.40
0.80
Ckt. 84 ( ) and Ckt. 86 ( ) current 2
Event 679
and 55.2% from 4278
and 56.1% from 4278
1.10
1.05
All recorded currents and voltages 3
Event 627
and
55% from 4062
and 60.8% from 4036
4.20
0.46
Ckt. 03 ( ) current 4
Event 316
and
45.5% from 4181
and 53.7% from 4055
0.60
0.3
Currents in all affected branches 5
Event 365
and
60% from 4416
and 74.1% from 4416
5.70
2.57
All currents and voltages 6
Event 439
and
2.0% from 4415
and 64.4% from 4416
5.20
4.71
Westfield Ckt. 81, external 7
Event 474
and 51.2% from 4416
and
56.8% from 4416
0.70
0.94
All monitored voltages 8
Event 581
54% from 4416
and 0.3% from 4530
4.80
3.02
All monitored currents and voltages 9
Event 805
and 86.6% from 5915
and 78.0% from 5915
15.0
7.20
All monitored currents and voltages, external 10
Event 860
and
69.8% from 4058
and 26.9% from 4058
2.90
1.41 11
Event 250
Event 252
and
89.6% from 4270
15.0% from 4270
3.00
1.46
All monitored currents 12
Event 865
Event 875
and
81.3% from 3390
and
5.80
5.81
Currents on affected Ckt. 98 13
Event 867
Event 876
and 2.26% from 3391
and 46.3% from 3391
4.91
2.13 14
Event 870
Event 877
and 95.9% from 3391
and 21.5% from 3391
7.27
0.48 15
Event 872
and 82.0% from 3390
and 27.4% from 3390
0.14
All currents