Using Infrared to Proactively Maintain the Distribution System Ben J Carranza
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Transcript of Using Infrared to Proactively Maintain the Distribution System Ben J Carranza
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Using Infrared toProactively Maintain the Distribution
System
Ben J Carranza
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Objectives
• Proactively address potential equipment failures
• Positively impact corporate SAIFI goal
• Develop processes to track:
– Survey costs
– Repair costs
– Avoided SAIFI
– Missed opportunities
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History
2000 2001 2002 2003 2004One camera
Part time effort
Full circuit surveys
Two Four
Full time effort
Equipment surveys
Operator training
INFR notifications
Glower process
Request initiated Annual schedule
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Survey Impacts
Avoided SAIFI
0.167
0.2063 0.21
0
0.05
0.1
0.15
0.2
0.25
2002 2003 2004
Surveys
0
50
100
150
200
250
300
350
400
2000 2001 2002 2003 2004
Outages Preventable with IR
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
2002 2003
SA
IFI
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Survey Costs
• Average survey cost per circuit (salary & burden)
– $475.00
• Average repair cost per critical item – $1,100.00
• Cost/performance projections (per 0.1 avoided SAIFI)– Repair = $105,000
– Survey = $57,000
– Total = $162,000
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Circuit Selection
Customer count Circuit loading Outage History(preventable with IR)X X
Weighted System(rank ascending)
=
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Selection Considerations
Includes all S/Cs Assigned by % of circuits
in system Vegetation management Currently on 5 year
survey cycle
2004 Service Center IR Circuits
34
45
9
8
13
11
24199
8
28
26
39
27
BAY BEL BPT CYP FTB GAL GPT
HOC HUM KTY MPK SPB SOH SUG
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Field Survey Process
• Start at substation
• Includes all getaways in substation
• Mid span splices & jumpers in first line section
• All primary circuit equipment
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One Line Diagram
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Field Survey Notes
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Report Criteria
Equipment Criteria:
• Watch List 75 - 99ºF CTD Recorded & on file
• Critical >100ºF CTD Inspect\Repair ASAP
For ‘04 the following criteria was added for equipment problems that are encased or blocked from direct view
• Indirect >20ºF CTD Inspect\Repair ASAP
CTD = 200ºF
Hot Spot = 300ºFReference = 100ºF SWITCH EXAMPLE
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Glower Process
Urgent process to communicate, to multiple departments, problems that are at severe risk of failure
• Targets >500F must be visually inspected with binoculars
• If target is physically damaged or glowing:
• Immediately contact Distribution Control (Dispatch)
• Issue SAP & urgent email notifications
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Glower Example #1
Bolted Connection on PTS
(melting aluminum, hot spot >1200F)
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Glower Example #2
Clamp Type Connection on TP
(Jumper melted from bracket & hung on hook stick disconnect ring)
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Reports
Issued for “Critical” primary equipment
Includes:
• Infrared & jpeg images
• Detail equipment information
• Visual problems like broken cross-arms and insulators
Does not Include:
• “Watch List” items kept on file; revisited 1 year later
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Report Example
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SAP Notifications
• Mainframe application
• Permanent record
• Provides link to work order data
• Consistent & accessible across company
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Monthly Progress Report
Surveys Notifs System W/O W/O Avg RepairAvg Repair Surveys Notifs System W/O W/O Avg Repair Avg RepairComplete Issued SAIFI Issued Closed Weeks Cost Complete Issued SAIFI Issued Closed Weeks Cost
BAY 0 0 0.00000 5 1 6 $600 35 18 0.01130 9 2 4 $805BPT 0 0 0.00000 0 0 0 $0 7 5 0.00613 1 2 4 $755GAL 0 0 0.00000 0 0 0 $0 9 4 0.00238 3 0 0 $0GPT 0 0 0.00000 0 0 0 $0 30 16 0.01937 2 0 0 $0HUM 2 0 0.00000 0 2 3 $718 15 4 0.00571 5 4 2 $479MPK 5 3 0.00272 0 0 0 $0 26 12 0.01107 0 0 0 $0SOH 2 0 0.00000 0 0 0 $0 32 27 0.02489 4 0 0 $0
EAST 9 3 0.00272 5 3 9 $659 154 86 0.08085 24 8 10 $680
BEL 3 5 0.00532 0 4 5 $860 61 35 0.03020 24 8 5 $675CYP 0 0 0.00000 2 0 0 $0 6 6 0.01295 2 0 0 $0FTB 2 0 0.00000 0 0 0 $0 10 4 0.00477 3 0 0 $0HOC 4 2 0.00223 0 0 0 $0 25 11 0.00958 5 1 1 $293KTY 0 0 0.00000 0 0 0 $0 8 5 0.00748 0 0 0 $0SBR 6 4 0.00598 0 0 0 $0 19 20 0.02104 0 0 0 $0SUG 2 0 0.00000 1 0 0 $0 45 34 0.03946 1 0 0 $0
WEST 17 11 0.01354 3 4 5 $860 174 115 0.12547 35 9 6 $484
SYSTEM 26 14 0.01625 8 7 14 $760 328 201 0.20633 59 17 16 $582
MONTH YEAR TO DATETOTAL
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Pole Fires
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Pole Fires (Cont.)
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Switch Example #1
Bolted Connection
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Switch Example #2
Switch Body
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Switch Example #3
Hinge Pin Assembly
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Misc. Example #1
Primary Crimp Splice
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Misc. Example #2
Cap Oil Switch & Bushing Connector
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Misc. Example #3
Neutral Current
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Misc. Example #4
Secondary Pedestal, URD
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Any Questions???
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Distribution System Reliability
• Ben J. Carranza
(713) 945-6807
• Brandt Gonzales (Lvl. 1 Certified IR Thermographer)
(713) 945-6457
• R. Brent Williams
(713) 945-6063
Contact Information