Research Article
Multiparameter-Based Fuzzy Logic Health Index Assessment for Oil-Immersed Power Transformers
Table 5
Test data of 20 transformers rated between 20MVA and 175MVA (88 kV–420 kV).
| Tx no | Year of installation | H2 (ppm) | CH4 (ppm) | C2H2 (ppm) | C2H6 (ppm) | C2H4 (ppm) | CO2 (ppm) | CO (ppm) | Furans (ppm) | Moisture (ppm) | Acidity (mg KOH/g) | BDV (kV) | DDF (%) | IFT (dynes/ cm) | Colour | HST (°C) | Load (pu) |
| Tx1 | 1996 | 234 | 300 | 52 | 56 | 29 | 5495 | 700 | 0.25 | 22 | 0.07 | 52 | 0.14 | 30 | 1.5 | 60 | 0.58 | Tx2 | — | 607 | 119 | 3 | 257 | 67 | 2011 | 189 | 1.37 | 23 | 0.13 | 44 | 0.264 | 24 | 2 | 61 | 0.6 | Tx3 | 1996 | 32.5 | 45.8 | 17 | 25.54 | 21.31 | 3685 | 697 | 0.49 | 16.5 | 0.058 | 61 | 0.174 | 27 | 2 | 49 | 0.57 | Tx4 | 1986 | 74 | 347 | 35 | 194 | 172 | 22789 | 8197 | 4.5 | 28 | 0.18 | 40 | 0.266 | 20 | 2.5 | 78 | 0.61 | Tx5 | — | 71 | 65 | 18 | 127 | 79 | 4567 | 582 | 1.1 | 19 | 0.15 | 38 | 0.185 | 23 | 2.5 | 58 | 0.44 | Tx6 | 2000 | 107 | 129 | 0 | 55 | 68 | 7038 | 892 | 0.1 | 26 | 0.09 | 48 | 0.249 | 25 | 1.5 | 66 | 0.65 | Tx7 | 1981 | 979 | 236 | 112 | 183 | 180 | 2492 | 1843 | 5.76 | 23.2 | 0.251 | 51.7 | 0.458 | 26 | 3 | 75 | 0.72 | Tx8 | 1976 | 1498 | 395 | 26 | 323 | 395 | 12371 | 1582 | 3.9 | 33 | 0.19 | 35 | 0.593 | 25 | 4 | 66 | 0.48 | Tx9 | 1996 | 294 | 748 | 6 | 212 | 1348 | 6764 | 669 | 0.83 | 9 | 0.08 | 49 | 0.1 | 35 | 2.5 | 77 | 0.75 | Tx10 | — | 163 | 106 | 9 | 298 | 1517 | 2348 | 299 | 4.48 | 42 | 0.22 | 46 | 0.221 | 21 | 3.5 | 64 | 0.45 | Tx11 | 1998 | 151 | 8 | 8 | 151 | 10 | 2323 | 297 | 0.22 | 6 | 0.13 | 64 | 0.566 | 27 | 2 | 68 | 0.5 | Tx12 | — | 678 | 368 | 163 | 92 | 108 | 1139 | 162 | 0.16 | 11 | 0.05 | 70 | 0.113 | 38 | 1 | 81 | 0.82 | Tx13 | 2015 | 893 | 724 | 1 | 6 | 18 | 1883 | 242 | 0.03 | 9 | 0.04 | 71 | 0.068 | 45 | 0 | 56 | 0.55 | Tx14 | 1995 | 195 | 660 | 22 | 127 | 79 | 3347 | 356 | 0.09 | 6 | 0.03 | 66 | 0.207 | 41 | 1 | 53 | 0.6 | Tx15 | 1990 | 440 | 522 | 183 | 31 | 62 | 5382 | 685 | 0.31 | 12 | 0.05 | 65 | 0.319 | 28 | 2 | 50 | 0.66 | Tx16 | 2010 | 15 | 8 | 0 | 9 | 5 | 7135 | 902 | 0.1 | 10 | 0.03 | 55 | 0.15 | 42 | 1 | 61 | 0.44 | Tx17 | 2005 | 1176 | 4 | 1 | 4 | 10 | 4991 | 637 | 0.83 | 10 | 0.09 | 62 | 0.733 | 29 | 1.5 | 53 | 0.5 | Tx18 | — | 441 | 678 | 55 | 73 | 62 | 13345 | 1695 | 5.1 | 32 | 0.25 | 55 | 0.328 | 26 | 3 | 77 | 0.62 | Tx19 | 2000 | 75 | 44 | 0 | 106 | 13 | 7846 | 261 | 2.4 | 40 | 0.092 | 31 | 0.416 | 22 | 3 | 61 | 0.55 | Tx20 | 2002 | 181 | 79 | 21.1 | 56 | 29 | 713 | 192.6 | 8.91 | 21.2 | 0.349 | 33.5 | 0.257 | 20 | 3 | 50 | 0.5 |
|
|