Table 1:

(a) Performance of NNPCA and FFBPNN having topology of 12-11-1

Neural network topology Training error Max. epoch Inrush Fault P A P A NNPCA 0.0001 1000 −1.0 0.0 0.96 1.0 FFBPNN 0.0001 1000 −1.0 0.0 0.96 1.0

P: predicted, A: actual.

(b) Accuracy in classification (%)

Trained transformer ratings Tested transformer ratings 315 MVA 200 MVA 160 MVA FFBPNN NNPCA FFBPNN NNPCA FFBPNN NNPCA 315 MVA 99.32 100 94.59 100 98.64 100 200 MVA 94.59 100 99.32 100 98.64 100 160 MVA 94.59 100 96.32 100 100 100