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Circuit Data. Outage Data. Review of TADS Data for 2011. Automatic Outages. Multiple Element Automatic Outages. Review of TADS Automatic Outage Data for 2011. Review of TADS Planned Outage Data for 2011. Review of TADS Planned Outage Data for 2011. TADS Comparison, 2011 vs 2010. - PowerPoint PPT Presentation
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Review of TADS Data for 2011
Voltage Class Name Metric
AC Transmission Outages - Failed
Protection System
Equipment
AC Transmission
Outages - Human Error
AC Transmission Outages - Failed AC Substation
Equipment
AC Transmission Outages - Failed
AC Circuit Equipment
AC Transmission
Outages - Lightning
AC Transmission
Outages - Contamination
AC Transmission
Outages - Foreign
Interference
Total
Element Availability Percentage
(APC)
Transmission System
Unavailability
AC Circuit 300-399 kV
Outages per Circuit 0.0305 0.0677 00.1320 0.0508 0.2067 0.1667 0.0567 0.9300 98.0276 1.9724
AC Circuit 300-399 kV
Outages per 100 miles per year 0.0933 0.2073 0.4042 0.1555 0.6426 0.5183 0.1762 2.8918
300-399 kV Jan-11 Dec-11
# Circuits 290 310
Circuit Miles 9601.0 9845.6
Multi-circuit Structure Miles 2755.3
Automatic Outages
Circuit Data
Outage Information Count Duration (hrs)
Automatic 279 1908.7
Non-Automatic 788 48190.3
Outage Data
Fault Types Count % Count % Duration %No fault 10 6.80% 50 37.88% 652.07 34.16%P-P fault 0 0.00% 7 5.30% 677.6 35.50%P-G fault 135 91.84% 68 51.52% 547.45 28.68%P-P-G, 3P, or 3P-G fault 2 1.36% 6 4.55% 30.02 1.57%Unknown 0 0.00% 1 0.76% 1.53 0.08%Total 147 132 1908.67
Momentary Sustained
Outage Information CountDuration
(hrs)
Two Elements 18 319.03
Three Elements 1 13.10
Four or More Elements 2 58.75
Multiple Element Automatic Outages
Review of TADS Automatic Outage Data for 2011
8.2%
29.9%
22.4%
10.9%
3.4%
8.8%
0.7%2.7%
0.0%
0.7%12.2%
0.0%
Momentary Outage Cause Weather, excluding lightning
Lightning
Contamination
Foreign Interference
Fire
Failed AC Substation Equipment
Failed Protection System Equipment
Failed AC Circuit Equipment
Power System Condition
Human Error
Unknown
Other
7.6%
13.6%
12.9%
0.8%
10.6%19.7%
6.1%
8.3%
0.0%
14.4%
3.8% 2.3%
Sustained Outage Cause Weather, excluding lightning
Lightning
Contamination
Foreign Interference
Fire
Failed AC Substation Equipment
Failed Protection System Equipment
Failed AC Circuit Equipment
Power System Condition
Human Error
Unknown
Other
0.2% 1.5% 3.1%0.1%
36.2%
11.8%1.3%
23.3%
12.3%
8.2%
0.1% 1.8%
Sustained Outage DurationWeather, excluding lightning
Lightning
Contamination
Foreign Interference
Fire
Failed AC Substation Equipment
Failed Protection SystemEquipmentFailed AC Circuit Equipment
Power System Condition
Human Error
Unknown
Other
0
10
20
30
40
50
60
70Sustained Outages Momentary Outages
Automatic Outages By Month
Review of TADS Planned Outage Data for 2011
0
20
40
60
80
100
120
140
Planned & Operational Outages by Month
010002000300040005000600070008000
Planned & Operational Outage Duration by Month (Hours)
62779.6%
9411.9%
10.1%
486.1%
141.8%
00.0%
40.5%
Planned & Operational Outage CauseMaintenance andConstruction3rd Party Request
Other Planned Outage
Emergency
System Voltage LimitMitigationSystem Operating LimitMitigationOther Operational Outage 39564.23
82%
1314.973%
215.020%
320.421%
6762.0314%
00% 13.63
0%
Planned & Operational Outage Duration (Hours) Maintenance and
Construction3rd Party Request
Other Planned Outage
Emergency
System Voltage LimitMitigationSystem Operating LimitMitigationOther Operational Outage
Review of TADS Planned Outage Data for 2011
0.1% 0.5% 0.9%3.8%
66.1%
8.1%
20.4%
Planned & Operational Outage Count by Duration
1-5 minutes
6-10 minutes
11-30 minutes
31-120 minutes
121 minutes to 24 hours
>24 hours to 48 hours
> 48 hours
TADS Comparison, 2011 vs 2010
2010 2011
Outage Information Count Duration (hrs) Count Duration (hrs)
Automatic 194 1089.53 279 1908.65
Non-Automatic 572 32467.77 787 46712.4
2010 2011 2010 2011Voltage Class 300-399 kV 300-399 kV 300-399 kV 300-399 kV
Metric Outages/Number of circuits Outages/100 mi/year
AC Transmission Outages - Failed Protection System Equipment 0.0601 0.0305 0.1506 0.0926
AC Transmission Outages - Human Error 0.0141 0.0677 0.0430 0.2057
AC Transmission Outages - Failed AC Substation Equipment 0.0955 0.1320 0.2474 0.4011
AC Transmission Outages - Failed AC Circuit Equipment 0.0354 0.0508 0.0860 0.1543
AC Transmission Outages - Lightning 0.1314 0.2067 0.3872 0.6376
AC Transmission Outages - Contamination 0.1387 0.1667 0.4087 0.5142
AC Transmission Outages - Foreign Interference 0.1131 0.0567 0.3334 0.1748
Total 0.7080 0.9300 2.0865 2.8694
Element Availability Percentage (APC) 98.6450 98.0625
Transmission System Unavailability 1.3550 1.9375
TADS Comparison, 2011 vs 2010
0
10
20
30
40
50
60
702010 2011
Automatic Outages by Month
0
20
40
60
80
100
120
1402010 2011
Planned and Operational Outages by Month
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
100002010 2011
Planned and Operational Outage Duration by Month
TADS Comparison, 2011 vs 2010
0
5
10
15
20
25
30
35
40
45
502010 2011
Momentary Outages by Cause
0
5
10
15
20
25
302010 2011
Sustained Outages by Cause
0
100
200
300
400
500
600
700
8002010 2011
Sustained Outage Duration by Cause
