Research Article
Interaction of Transformer Oil Parameters on Each Other and on Transformer Health Index Using Curve Estimation Regression Method
Table 10
Comparison of five regression methods to predict the relationship between water and C2H6 parameters of transformer.
| | Equation | Model summary | Parameter estimates | | R-Square | F | df1 | df2 | Sig | Constant | b1 | b2 | b3 |
| | Cubic | 0.207 | 10.108 | 3 | 116 | 0 | 4.591 | 0.088 | 0 | 4.340E-8 | | Compound | 0.039 | 4.734 | 1 | 118 | 0.032 | 4.292 | 1 | — | — | | Growth | 0.039 | 4.734 | 1 | 118 | 0.032 | 1.457 | 0 | — | — | | Exponential | 0.039 | 4.734 | 1 | 118 | 0.032 | 4.292 | 0 | — | — | | Logistic | 0.039 | 4.734 | 1 | 118 | 0.032 | 0.233 | 1 | — | — |
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Dependent variable: water; independent variable: C2H6.
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