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IEEE C57.104 Revision (Nov 2011)

IEEE C57.104 Revision (Nov 2011). TF Database Analysis Luiz Cheim and Lan Lin ABB Inc. Building the Database . + HQ = 521,700 records. Transformers Age Groups. Transformers Power Ratings. Transformers Voltage Classes. Transformers Oil Preservation Type. Reason for DGA.

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IEEE C57.104 Revision (Nov 2011)

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  1. IEEE C57.104 Revision (Nov 2011) TF Database Analysis Luiz Cheim and Lan LinABB Inc.

  2. Building the Database + HQ= 521,700 records

  3. Transformers Age Groups

  4. Transformers Power Ratings

  5. Transformers Voltage Classes

  6. Transformers Oil Preservation Type

  7. Reason for DGA

  8. Percentiles of Hydrocarbons (all data) ppm %

  9. Percentiles of CO,CO2 and TDCG (all data) ppm %

  10. Percentiles of H2, C2H2 and CO vs. Age Groups ppm %

  11. Percentiles of H2, C2H2 and CO vs. Voltage Class ppm %

  12. Percentiles of H2, C2H2 and CO vs. Power Ratings ppm %

  13. Percentiles of H2, C2H2 and CO vs. Source of Data ppm %

  14. Percentiles of All Gases (Suspicious Units) ppm %

  15. Percentiles of H2, C2H2 and CO vs. Power Ratings(Suspicious Units) ppm %

  16. Percentiles of H2, C2H2 and CO vs. Voltage Class(Suspicious Units) ppm %

  17. Percentiles of H2, C2H2 and CO vs. Oil Preservation ppm %

  18. Annual Rate of Gas Formation (ppm/year)Percentiles of All Gases ppm %

  19. After that… • HQ Data incorporated • Discussed unknown oil preservation system • Question of Rate of Gas Formation vs Levels

  20. Montreal Meeting (May 2o12) Revisited Percentiles with Following Condition: O2/ (N2 + O2) < 5% and N2 > 70,000 => N2 Blanket 5 – 15% Membrane/Rubber Bag > 15% Open Breather

  21. Legend (next slides)

  22. H2 – All Data Cigre AFSi AFMo IEEE

  23. CH4 – All Data Cigre IEEE AFSi AFMo

  24. C2H2 – All Data Cigre AFMo IEEE AFSi

  25. C2H4 – All Data Cigre AFMo IEEE AFSi

  26. C2H6 – All Data Cigre IEEE AFMo AFSi

  27. CO – All Data  Cigre AFSi = 1936 AFMo IEEE

  28. CO2 – All Data  Cigre AFMo AFSi = 25,387 IEEE

  29. TDCG – All Data  Cigre AFMo AFSi = 2,160 IEEE

  30. Further Breakdown… Given a type of oil preservation (say, N2 Blanket) What happens to Gas Levels vs Voltage Class, MVA, Age?

  31. H2, 90thPercentile – Per Voltage Class Cigre AFMo IEEE AFSi

  32. H2, 90th Percentile – Per MVA Rating Cigre AFSi IEEE AFMo

  33. H2, 90th Percentile – Per Age Group Cigre AFSi IEEE AFMo

  34. C2H6, 90th Percentile – Per Voltage Class Cigre

  35. Revision C57.104 – TF on Data Analysis Gas Rate Subject 1. Should we calculate rates percentiles for all gases? 2. Should we associate rates to levels? How? 3. Cigre recent experience

  36. Revision C57.104 – TF on Data Analysis Cigre Levels vs Sampling Intervals Cigre SCD1.32 Brochure, December 2010

  37. Revision C57.104 – TF on Data Analysis Cigre Rates vs Sampling Intervals Cigre SCD1.32 Brochure, December 2010

  38. Revision C57.104 – TF on Data Analysis Cigre SCD1.32 Brochure December 2010

  39. Revision C57.104 – TF on Data Analysis Proposal Under Discussion – Level vs Rate Frequency of DGA

  40. Revision C57.104 – TF on Data Analysis Proposal Under Discussion – Level vs Rate Severity of Fault (?)

  41. Revision C57.104 – TF on Data Analysis Gas Rates (IEEE Database)

  42. Revision C57.104 – TF on Data Analysis Gas Rates (IEEE Database)

  43. Revision C57.104 – TF on Data Analysis Gas Rate Issues 115 72 133 days

  44. Revision C57.104 – TF on Data Analysis Gas Rate Issues 115 72 133 days

  45. Revision C57.104 – TF on Data Analysis Gas Rate Issues  ± 15% Cigre Typical Lab Accuracy 133 days

  46. Revision C57.104 – TF on Data Analysis Gas Rate Issues ? 115 72 68 343 days

  47. Revision C57.104 – TF on Data Analysis Gas Rate Issues

  48. Revision C57.104 – TF on Data Analysis Another Example

  49. Revision C57.104 – TF on Data Analysis Another Example 27 ppm/year 500 ppm/year

  50. Revision C57.104 – TF on Data Analysis InherentUncertainty in Trend Calculation • Multiple Laboratories • Lab Variations (repeatability, reproducibility, accuracy) • Seasonal variations (temperature, etc) • Sampling errors (humans, sample contamination, etc) • Type of Transformer (N2, etc…) • Sampling interval??

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