Power Transformer Differential Protection Based on Neural Network Principal Component Analysis, Harmonic Restraint and Park's Plots

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