Research Article
Multiparameter-Based Fuzzy Logic Health Index Assessment for Oil-Immersed Power Transformers
Table 7
Health index status by different methods for 20 different test transformers.
| Tx. No | Transformer health index level and description | Utility estimation | Method in [8] | Method in [5] | Proposed method |
| Tx1 | Good | 0.275 | Good | 0.275 | Good | 0.278 | Good | Tx2 | Moderate | 0.552 | Moderate | 0.572 | Moderate | 0.657 | Moderate | Tx3 | Excellent | 0.120 | Excellent | 0.143 | Excellent | 0.28 | Good | Tx4 | Worst | 0.936 | Worst | 0.972 | Worst | 0.992 | Worst | Tx5 | Moderate | 0.5 | Moderate | 0.452 | Moderate | 0.498 | Moderate | Tx6 | Good | 0.273 | Good | 0.275 | Good | 0.275 | Good | Tx7 | Worst | 0.832 | Bad | 0.894 | Bad | 0.944 | Bad | Tx8 | Worst | 0.991 | Worst | 0.99 | Worst | 0.992 | Worst | Tx9 | Moderate | 0.752 | Bad | 0.52 | Moderate | 0.528 | Moderate | Tx10 | Bad | 0.899 | Bad | 0.934 | Bad | 0.991 | Worst | Tx11 | Good | 0.225 | Good | 0.233 | Good | 0.248 | Good | Tx12 | Good | 0.264 | Good | 0.273 | Good | 0.275 | Good | Tx13 | Excellent | 0.083 | Excellent | 0.083 | Excellent | 0.12 | Excellent | Tx14 | Excellent | 0.12 | Excellent | 0.122 | Excellent | 0.121 | Excellent | Tx15 | Moderate | 0.45 | Moderate | 0.51 | Moderate | 0.525 | Moderate | Tx16 | Excellent | 0.08 | Excellent | 0.104 | Excellent | 0.12 | Excellent | Tx17 | Good | 0.25 | Good | 0.278 | Good | 0.348 | Good | Tx18 | Worst | 0.887 | Bad | 0.9 | Bad | 0.991 | Worst | Tx19 | Worst | 0.913 | Bad | 0.926 | Bad | 0.931 | Bad | Tx20 | Worst | 0.98 | Worst | 0.983 | Worst | 0.992 | Worst |
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