Maintenance Strategy & Failure Analysis

Presented by: Devin GavinSummer 2014

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Maintenance Strategy and Failure Analysis Puts maintenance strategies in place for all equipment

across PHI. Responsible for reliability and performance of

equipment. Failure analysis helps determine action to take to

improve reliability.

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What I Did: Overview Dissolved Gas Analysis (DGA)

monitor project Failure Analysis

fieldwork/reporting Maintenance Strategy

database updating

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On-Line Dissolved Gas Analysis What’s on-line DGA?• Real-time remote monitoring• Shows abnormal conditions• Time to plan

What’s Doble Delphi?• Detects 4 gases• Currently installed on one

transformer in the field• How it works

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On-Line Dissolved Gas Analysis Results• Installation• Further Review• Parallel Project (Qualitrol)

Importance• Preventing faults and failures• Reduce cost• Improve reliability and safety

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Failure Analysis Inspected Feeder 69031 after 6/19 storm and prepared

report Observed transformer teardowns Prepared a GE transformer teardown report

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Maintenance Strategy Updated Underground Failure Database Added MAT description and location information to the

Scheduled Units database for analysis. Created pivot tables for tracking the number of

scheduled units completed so far in 2014 across PHI. Compiled substation inspection reports for COMAR

Audits.

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Failure Analysis and Maintenance Strategy Results• Failures were recorded and reported to other PHI

departments.• Databases were updated to be ready for analysis.

Importance• Failures must be analyzed and reported to recommend

changes to improve the reliability of equipment.• Scheduled unit and Manhole event spreadsheets can be

used for analysis .• Substation reports are prepared for upcoming audits.

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What I Learned/Gained Power System Electric Equipment and uses Safety Understanding of Utility View vs. Customer Importance of Maintenance and Failure Analysis DGA Outage follow-up Workplace Experience Networking

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Questions