using infrared to proactively maintain the distribution system ben j carranza n.
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Using Infrared to Proactively Maintain the Distribution System Ben J Carranza. Objectives. Proactively address potential equipment failures Positively impact corporate SAIFI goal Develop processes to track: Survey costs Repair costs Avoided SAIFI Missed opportunities. History.

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Presentation Transcript
objectives
Objectives
  • Proactively address potential equipment failures
  • Positively impact corporate SAIFI goal
  • Develop processes to track:
    • Survey costs
    • Repair costs
    • Avoided SAIFI
    • Missed opportunities
history
History

2000

2001

2002

2003

2004

One camera

Two

Four

Part time effort

Full time effort

Request initiated

Annual schedule

Full circuit surveys

Equipment surveys

Operator training

INFR notifications

Glower process

survey costs
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
circuit selection
Circuit Selection

Customer count

Circuit loading

Outage History

(preventable with IR)

X

X

=

Weighted System

(rank ascending)

selection considerations
Selection Considerations
  • Includes all S/Cs
  • Assigned by % of circuits in system
  • Vegetation management
  • Currently on 5 year survey cycle
field survey process
Field Survey Process
  • Start at substation
  • Includes all getaways in substation
  • Mid span splices & jumpers in first line section
  • All primary circuit equipment
report criteria
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

SWITCH EXAMPLE

Reference = 100ºF

Hot Spot = 300ºF

CTD = 200ºF

glower process
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
glower example 1
Glower Example #1

Bolted Connection on PTS

(melting aluminum, hot spot >1200F)

glower example 2
Glower Example #2

Clamp Type Connection on TP

(Jumper melted from bracket & hung on hook stick disconnect ring)

reports
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
sap notifications
SAP Notifications
  • Mainframe application
  • Permanent record
  • Provides link to work order data
  • Consistent & accessible across company
switch example 1
Switch Example #1

Bolted Connection

switch example 2
Switch Example #2

Switch Body

switch example 3
Switch Example #3

Hinge Pin Assembly

misc example 1
Misc. Example #1

Primary Crimp Splice

misc example 2
Misc. Example #2

Cap Oil Switch & Bushing Connector

misc example 3
Misc. Example #3

Neutral Current

misc example 4
Misc. Example #4

Secondary Pedestal, URD

contact information
Contact Information
  • Distribution System Reliability
  • Ben J. Carranza
  • (713) 945-6807
  • ben.carranza@centerpointenergy.com
  • Brandt Gonzales (Lvl. 1 Certified IR Thermographer)
  • (713) 945-6457
  • brandt.gonzales@centerpointenergy.com
  • R. Brent Williams
  • (713) 945-6063
  • richard.b.williams@centerpointenergy.com