Download presentation

Presentation is loading. Please wait.

Published byAnahi Chalcraft Modified over 2 years ago

1
Luiz Cheim, Lan Lin - IEEE Fall Meeting - Milwaukee 10/23/2012 IEEE C57.104 Revision (Nov 2011) TF Database Analysis TF Database Analysis Luiz Cheim and Lan Lin ABB 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… 1. HQ Data incorporated 2. Discussed unknown oil preservation system 3. Question of Rate of Gas Formation vs Levels

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

21
Legend (next slides) IEEECondition 1 Limit CigreTypical Value (Brochure SCD1.32, 2010) AFMoArc Furnace, 90th Percentile (mineral oil) AFSiArc Furnace, 90th Percentile (Silicon oil)

22
H2 – All Data IEEE AFMo AFSi Cigre

23
CH4 – All Data IEEE AFMo AFSi Cigre

24
C2H2 – All Data IEEE AFMo AFSi Cigre

25
C2H4 – All Data IEEE AFMo AFSi Cigre

26
C2H6 – All Data IEEE AFMo AFSi Cigre

27
CO – All Data IEEE AFMo AFSi = 1936 Cigre

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

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

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

31
H2, 90th Percentile – Per Voltage Class IEEE AFMo AFSi Cigre

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

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

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 72 115 133 days

44
Revision C57.104 – TF on Data Analysis Gas Rate Issues 72 115 133 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 72 115 343 days 68 ?

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 Inherent Uncertainty in Trend Calculation 1. Multiple Laboratories 2. Lab Variations (repeatability, reproducibility, accuracy) 3. Seasonal variations (temperature, etc) 4. Sampling errors (humans, sample contamination, etc) 5. Type of Transformer (N2, etc…) 6. Sampling interval??

51
Revision C57.104 – TF on Data Analysis Distribution of DGA Sampling Interval

52
Revision C57.104 – TF on Data Analysis Distribution of DGA Sampling Interval

53
Revision C57.104 – TF on Data Analysis Distribution of DGA Sampling Interval

54
Revision C57.104 – TF on Data Analysis Gas Rates Distribution vs DGA Sampling Interval

55
Revision C57.104 – TF on Data Analysis Gas Rates Distribution vs DGA Sampling Interval

56
Revision C57.104 – TF on Data Analysis Gas Rates Distribution vs DGA Sampling Interval

57
Revision C57.104 – TF on Data Analysis Gas Rates Distribution vs DGA Sampling Interval

58
Revision C57.104 – TF on Data Analysis Gas Rates Distribution vs DGA Sampling Interval

59
Revision C57.104 – TF on Data Analysis Gas Rates Distribution vs DGA Sampling Interval

60
Revision C57.104 – TF on Data Analysis Gas Rates Distribution vs DGA Sampling Interval 38%

61
Revision C57.104 – TF on Data Analysis Rates Distribution vs DGA Sampling Interval

62
Revision C57.104 – TF on Data Analysis 53 204

63
Revision C57.104 – TF on Data Analysis

67
Food for Thought!

68
Revision C57.104 – TF on Data Analysis Proposal for Discussion – Level vs Rate Severity of Fault (N2 Blanket, etc) 90 th | t 95 th | t … Table conditioned to t = Sampling Interval

69
Revision C57.104 – TF on Data Analysis Rate of Gas Increase vs Sampling Interval???

70
Revision C57.104 – TF on Data Analysis Rate of Gas Increase vs Sampling Interval???

71
Revision C57.104 – TF on Data Analysis Rate of Gas Increase vs Sampling Interval??? Food for Thought…

Similar presentations

OK

Confidence Intervals Objectives: Students should know how to calculate a standard error, given a sample mean, standard deviation, and sample size Students.

Confidence Intervals Objectives: Students should know how to calculate a standard error, given a sample mean, standard deviation, and sample size Students.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on 5 elements of earth Ppt on scheduling in production management Ppt on case study of tqm Ppt on preposition in hindi Ppt on soft skills and personality development Ppt on electrical network analysis Ppt on generation transmission and distribution of electricity in india Ppt on chromosomes and chromatin definition Ppt on recycling of waste material in india Ppt on credit default swaps charts