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Fault Statistics – Quo Vadis Günther Brauner AT

Fault Statistics – Quo Vadis Günther Brauner AT. Fault Statistic Indices. Network Statistics Voltage Dips (10 ms – 1 s) Short Interruptions (1 s – 3 min) Long Interruptions ( > 3 min) Consumer Statistics Non delivered energy SAIDI and SAIFI per customer. Fault Statistic Indices.

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Fault Statistics – Quo Vadis Günther Brauner AT

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  1. Fault Statistics – Quo VadisGünther Brauner AT

  2. Fault Statistic Indices • Network Statistics • Voltage Dips (10 ms – 1 s) • Short Interruptions (1 s – 3 min) • Long Interruptions (> 3 min) • Consumer Statistics • Non delivered energy • SAIDI and SAIFI per customer

  3. Fault Statistic Indices • Component Statistics • Component type (transformer, breaker, line…) • Manufacturer • Condition (age, loading, no. of operations…) • Fault type (mechanical, electrical, electronic…) • Maintenance history … • ….

  4. Reason for Faults • unplanned external (causes:lightning, storm, digging. . .) • unplanned internal (causes: ageing, mal operation) • planned (maintenance, reconstruction)

  5. MV-Fault Statistic is significant

  6. The Problem of Flagging of Faults • A fault in one network level has influence on other networks • Monitoring and Fault statistics show multiple counting • Origin of fault not evaluated • Flagging of faults can help to find the origin • Necessary if fault statistics are used for PQ-Regulation

  7. Monitoring and Flagging of Faults

  8. Fault Statistics – Quo Vadis • Austrian Energy regulation started without PQ-incentives • Only Tariff-Regulation • Austrian Statistics Directive (2002): Each Utility has to provide an Annual Report of Fault Statistics

  9. Fault Statistics in Austria • Voltage Dips (10 ms – 1 s) not valuated ! • Short Interruptions (1 s – 3 min) not valuated ! • Long Interruptions (> 3 min) • Only Long Interruptions are valuated • Non delivered energy • SAIDI and SAIFI per customer • Only Medium Voltage is valuated

  10. Who will use Fault Statistics ? • Regulator • Asset Management • Network Operation • Maintenance • Customer Relations

  11. Asset-Management and Regulation Regulator TQM Investment ROI Fault Statistics Costs Asset Owner Asset Management Service Provider Service Level Contract Service Level Contract

  12. Maintenance Strategy relevance to fault statistics • incidence based (x) • time based maintenance (x) • condition based maintenance x • life time based xx • forecast based xx • risc oriented xxx

  13. Future Trends in Fault Statistics • monitoring systems with flagging ? • evaluation internal and external influences ? • Statistics • Network statistic ? • Consumer Statistics ? • Component statistic ? • PQ Levels necessary (EN 50160 ?) • For PQ-regulation ? • For Asset Management and Planning ? • For system operation and maintenance ?

  14. Future Trends in PQ-Regulation • Annual publication by regulator • Bechmarking of Fault Levels • Independent PQ-Regulation ? • Incentives for PQ ? • Sanctions at low PQ-Standard ?

  15. Thank You for Your Audience !

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