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Reliability Valuation in AEP Texas

This study, performed in 2009, utilizes regression analysis to explore the effectiveness of reliability programs in AEP Texas. The analysis examines the correlation between different measures and outcomes, highlighting the importance of accurate labeling and the impact of diminishing returns. The results provide insights into strong performers, weaker than expected programs, and other notable findings.

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Reliability Valuation in AEP Texas

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  1. Reliability Valuation in AEP Texas A Study on Cost Vs Returns

  2. Introduction • Study performed in 2009 • Regression analysis • What is a reliability program? • Does it move the needle? • Reduction vs prevention

  3. Caveats • Analysis – Correlation or Causation? • Some outages mis-labeled • Diminishing Returns • Some programs very O&M heavy • Results specific to AEP Texas • The good ol’ disclaimer…

  4. Results Explanation • Projection • Dollars per customer minutes out • Percent capital

  5. Strong Performers • D-Line inspection and repair: • $1.00/CMI, 24% capital • Lightning mitigation: • $1.03/CMI, 100% capital • Sectionalizing: • $1.70/CMI, 99% capital • Station animal guards: • $4.71/CMI, 80% capital

  6. More Strong Performers • Replacing older relays • $5.42/CMI, 100% capital • Installing station SCADA • $5.67/CMI, 95% capital • Feeder ties/upgrades • $8.50/CMI, 95% capital

  7. Weaker Than Expected • Wire replacement: • $33.98/CMI, 95% capital • O&M savings from OT work • Performance-based forestry • $48.64/CMI, 24% capital • Pole replacement: • $495.05/CMI, 78% capital • Safety • Possibly skewed

  8. Other Notable Findings • Cycle-based forestry • $15.70/CMI, 18% capital • Hybrid forestry • $27.55/CMI, 18% capital • System hardening – not much data in 2009 • Distribution Automation – almost no data in 2009

  9. Conclusion • No plans to repeat the study at AEP • SAIDI and SAIFI not the only drivers • Customer satisfaction • Overtime O&M reduction • Safety • Don’t skimp on inspections!

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