Milwaukee WI LIGHTNING STRIKE DGA Results PPM Post Lightning Routine Oxygen O 2 7491 4642 Nitrogen N 2 86419 60903 Carbon Monoxide CO 790 182 Carbon Dioxide CO ID: 720917
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Slide1
Case Studies Task Force
IEEE C57-104 Workgroup Meeting
Milwaukee, WISlide2
LIGHTNING STRIKE
DGA Results (PPM)
Post Lightning
RoutineOxygen ( O2 )7,4914,642Nitrogen ( N2 )86,41960,903Carbon Monoxide (CO)790182Carbon Dioxide (CO2)7,3043,540
DGA Results (PPM)
Post LightningRoutineHydrogen ( H2 )2,60415Methane (CH4)5169Ethylene (C2H4)1,14762Ethane ( C2H6)935Acetylene (C2H2)2,0610
Roger’s Ratio and IEC 60599 Methods Post-FailureR1 CH4/H2 IEC Term 20.2R2 C2H6 / CH40.18R3 C2H4/C2H6 IEC Term 312.33R4 C2H2/C2H4 IEC Term 11.8Roger’s Ratio Table 20,0,2,1 ArcingIEC Ratio Table 3D2 High energy dischargeOther Important RatiosO2/( O2+ N2)0.08CO2/CO9.25
Duval Triangle Method (Table 5)
Post-Lightning
% CH
4
13.90%
%C
2
H
4
30.80%
%C
2
H
2
55.30%
Code
D2Slide3
SAGGING GROUND STRAP
DGA Results (PPM)
Post Move
Pre-moveHydrogen ( H2 )7045Oxygen ( O2 )6,0312,865Nitrogen ( N2 )9160883,652Methane (CH4)13956
Carbon Monoxide (CO)
129132Carbon Dioxide (CO2)3,7913,747Ethylene (C2H4)15967Ethane ( C2H6)8071Acetylene (C2H2)1490Total Combustible Gas726370DGA Results (PPM)
Post MovePre-moveOxygen ( O2 )6,0312,865Nitrogen ( N2 )9160883,652Carbon Monoxide (CO)129132Carbon Dioxide (CO2)3,7913,747DGA Results (PPM)Post MovePre-moveHydrogen ( H2 )7045Methane (CH4)
139
56
Ethylene (C
2
H4)15967Ethane ( C2H6)8071Acetylene (C2H2)1490Total Combustible Gas726370
Duval Triangle Method Post-Failure% CH431.10%%C2H435.60%%C2H233.30%CodeD2
Roger’s Ratio and IEC 60599
Methods`
Post-Failure
R1 CH
4
/H
2
IEC Term 2
1.99
R2 C
2
H
6
/ CH
4
0.54
R3 C
2
H
4
/C
2
H
6
IEC Term 3
1.99
R4 C
2
H
2
/C
2
H
4
IEC Term 1
0.94
Roger’s Ratio Table 2
(1,0,1,1) Close Fix to Arcing
IEC Ratio Table 3
Loose Fit to D2
Other Important Ratios
O
2
/( O
2+
N
2
)
0.06
CO
2
/CO
29Slide4
TURN TO TURN WINDING FAULT
DGA Results (PPM)
Post-Failure
Pre-FailureHydrogen ( H2 )1220Oxygen ( O2 )42474372Nitrogen ( N2 )8795288540Methane (CH4)01
Carbon Monoxide (CO)
35517Carbon Dioxide (CO2)63306684Ethylene (C2H4)2410Ethane ( C2H6)39Acetylene (C2H2)1000Total Combustible Gas60437DGA Results (PPM)
Post-FailurePre-FailureOxygen ( O2 )4,2474,372Nitrogen ( N2 )87,95288,540Carbon Monoxide (CO)35517Carbon Dioxide (CO2)6,3306,684DGA Results (PPM)Post-FailurePre-FailureHydrogen ( H2 )1220Methane (CH4)0
1
Ethylene (C
2
H
4)2410Ethane ( C2H6)39Acetylene (C2H2)1000Total Combustible Gas60437
Duval Triangle Method Post-Failure% CH40.00%%C2H419.40%%C2H280.60%CodeD1
Roger's Ratios
Method
Post-Failure
R1 CH
4
/H
2
IEC Term 2
0
R2 C
2
H
6
/ CH
4
0
R3 C
2
H
4
/C
2
H
6
IEC Term 3
8
R4 C
2
H
2
/C
2
H
4
IEC Term 1
4.2
Roger’s Diagnostic Table 2
5,0,2,2 close fit to Arcing
IEC Ratios Table 3
D1
Other Important Ratios
O
2
/N
2
0.1
CO
2
/CO
6.4Slide5
DETC TAP CHANGER FAULT
Sample Date
11/22/2002
7/31/20021/14/200211/21/20015/14/2001Hydrogen (H2)9242941521192Methane (CH4)4,2641,660690
825
60Carbon Monoxide (CO)3051741008432Carbon Dioxide (CO2)1,951793679651274Ethylene (C2H4)4,3921,52090873266
Ethane (C2H6)1,77158834526834Acetylene (C2H2)30000Combustible Gas11,6594,2362,1952,028193Sample Date11/22/027/31/021/14/02
11/21/01
5/14/01
Hydrogen (H
2
)9242941521192Methane (CH4)4,2641,66069082560Ethylene (C
2H4)4,3921,52090873266Ethane (C2H6)1,77158834526834
Acetylene (C
2
H
2
)
3
0
0
0
0
PPM/Day11/22/027/31/021/14/0211/21/01H25.60.70.60.6CH423.34.9-2.64.1C2H425.63.13.33.6C2H610.61.21.51.3C2H20.00.00.00.0Comb. Gas66.310.43.29.8
Ratios11/22/20027/31/20021/14/200211/21/2001R1 CH4/H2 IEC Term 24.65.74.56.9R2 C2H6 / CH40.40.40.50.3R3 C2H4/C2H6 IEC Term 32.52.62.62.7R4 C2H2/C2H4 IEC Term 10000Roger’s Diagnostic Table 22/0/1/02/0/1/02/0/1/02/0/1/0IEC Ratios Table 3T2T2T2T2O2/( O2+ N2)0.090.090.080.04CO2 / CO6.44.66.87.8
Duval Triangle Method ( See Table 4 and 5)
Ratios
11/22/2002
7/31/2002
1/14/2002
11/21/2001
% CH
4
49.20%
52.20%
43.20%
53.00%
%C
2
H
4
50.70%
47.80%
56.80%
47.00%
%C
2
H
2
0.00%
0.00%
0.00%
0.00%
Diagnostic Code (Table 5)
T3
T2
T3
T2Slide6
UNINTENTIONAL CORE GROUND FAULT
Sample Date
7/9/2001
5/30/20013/31/2000Hydrogen (H2)8405380Oxygen (O2)4,8191,94523,566Nitrogen (N2)90,23278,961
88,681
Methane (CH4)001Carbon Monoxide (CO)3,3952,694213Carbon Dioxide (CO2)700423656Ethylene (C2H4)5,6735,4150Ethane (C2H6)1,021976
0Acetylene (C2H2)500Total Combustible Gas10,9339,624214Roger’s and IEC Ratio Methods (Table 1, 2 & 3)Sample Dates7/9/20015/30/2001R1 CH4/H2 IEC Term 200R2 C2H6 / CH400R3 C2H4/C2H6 IEC Term 35.6
5.6
R4 C
2
H
2/C2H4 IEC Term 100Roger’s Ratio5,0,2,05,0,2,0IECNo fitNo fitOther Important RatiosO2/( O2+ N2)0.050.02CO2/CO0.2
0.16Duval Triangle Method (Table 4 and 5)Sample Date07/09/0105/30/0103/31/00% CH40.0%0.0%100.0%
%C
2
H
4
99.9%
100.0%
0.0%
%C
2
H2
0.1%0.0%0.0%Diagnostic Code (Table 5)T3 Region, Thermal Fault, T >700 °CSlide7
HIGH VOLTAGE PHASE TO GROUND
Sample Date
2/16/2004
2/13/2004Hydrogen ( H2)9013Oxygen (O2)34,78425,811Nitrogen (N2)114,213101,010Methane (CH4)485
Carbon Monoxide (CO)
158113Carbon Dioxide (CO2)653524Ethylene ( C2H4)1133Ethane (C2H6)52Acetylene (C2H2)3540Combustible Gas768136Roger’s and IEC Ratio Methods
Ratios R1 CH4/H2 IEC Term 20.5R2 C2H6 / CH40.1R3 C2H4/C2H6 IEC Term 322.6R4 C2H2/C2H4 IEC Term 13.1Diagnostic Case 2 (Table 2)(0,0,2,2) ArcingIEC Ratio (Table 3)D1Other Important RatiosO2/( O2+N2)0.23CO2/CO4.13
Duval Triangle Method (Table 2)
Ratios
2/16/04
% CH
49.3%%C2H421.9%%C2H268.7%Diagnostic Code (Table 5)D2Slide8
Thank You