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10% Worst Performing Circuits Reliability Program SWEDE Conference San Antonio, TX May 10, 2007

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10% Worst Performing Circuits Reliability Program SWEDE Conference San Antonio, TX May 10, 2007 Kenton M. Brannan, P.E. [email protected] Historical Approach Enhanced Process Identification of Probable 10% Circuits Circuit Evaluation & Improvements

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Presentation Transcript
slide1

10% Worst Performing Circuits

Reliability Program

SWEDE Conference

San Antonio, TX

May 10, 2007

Kenton M. Brannan, P.E.

[email protected]

10 circuit reliability program
Historical Approach

Enhanced Process

Identification of Probable 10% Circuits

Circuit Evaluation & Improvements

Reliability Oversight Committee

Documentation Procedure

Tree Trim Process

Notable Changes

Process Assessment

Anticipated Process Enhancements

10% Circuit Reliability Program
historical approach
10% Circuit Standard

Performance measured from Jan 1 to Dec 31

Prefer to have improvements made by Jan 1

CNP’s Historical Approach

Circuit reviews began in 4th Quarter

Infrared and Tree Trim processes separate from 10% circuit review

No specific deadlines to complete action plans

Differing methods among service centers

Historical Approach
enhanced process
Identification of Probable 10% Circuits

Begins upon conclusion of 2nd Quarter with June YTD circuit performance data

Data available for analysis by mid-July

Begin with top 30 circuits from SAIDI/SAIFI lists

Confidence level: ≈ 25% of top 10 % circuits

≈ 15 circuits are added each month until year end

Final 10% circuits (≈ 40) are identified by mid-January from year end data

Enhanced Process
enhanced process1
Circuit Evaluation & Improvements – 90 Days

90 day timeframe begins on date of identification as probable 10% circuit

1st 45 days

Perform root cause analysis and develop action plan to improve circuit performance

Attempt to achieve “Reduce-To” values

2nd 45 days

Complete field work called for in action plan

Enhanced Process
enhanced process2
Reliability Oversight Committee

Consists of engineering and operations personnel

Evaluates proposed action plans (within 1st 45 days)

Documentation Procedure

Progress tracked via MS SharePoint

Reports

Circuit Level Summary Report

System Reliability Dashboards

Enhanced Process
tree trim process
Focus

10% Circuits – 4th quarter of the previous year and 1st quarter of the new year

All Circuits – 2nd and 3rd quarters

4th quarter Selection Criteria

Information on probable 10% circuits

Outage data due to vegetation & wind

time since last trim

Emphasis on 10% circuits with highest priority given to repeat and 300% circuits

Tree Trim Process
notable changes
Timeframe

Begin closely analyzing probable 10% circuits in July rather than October or November

Infrared Process

Increase current inspection cycle from 3 years to 5

5 year system focus (≈ 300 circuits/year)

Additional focus on 10% circuits (≈ 200 circuits)

Tree Trim

New process has been enhanced to incorporate the 10% circuits in the proactive tree trimming strategy

Notable Changes
process assessment
Root cause analysis & circuit work is being completed earlier in the year as compared to past years

Reliability Oversight Committee

Identifying synergies

Sharing of resources occurring

Process very effective thus far

Process Assessment
anticipated process enhancements
Identify probable 300% circuits before 2nd Q ends

Refine target SAIDI and SAIFI values using historical values and statistical methods

Abandon MS SharePoint and move to SAP/Business Warehouse

Anticipated Process Enhancements
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