Power Transformer Fault Severity Estimation Based on Dissolved Gas Analysis and Energy of Fault Formation Technique

Table 5

Test data and model results.

	Test data									Model results
Tx. no.	H2	CH4	C2H2	C2H6	C2H4	CO	CO2	Temp.	A.FAULT	E.FAULT	A.F.E.L.L (kJ/kL)	A.F.ENERGY (kJ/kL)	T.F.E (kJ/kL)	Severity
1	234	300	52	56	29	193	713	50	F4	F4	1.3	3.7	15.7	Low
2	607	119	0	192	5	161	2320	62	F4	F4	1.3	6.7	44.0	Low
3	11	4	1	4	4	558	7624	48	F2	F2	39.4	116.3	116	Medium
4	74	65	35	194	172	1272	10529	55	F5	F5	40.3	136.2	137.6	High
5	71	347	18	127	79	504	2481	52	F2	F2	38.2	40.8	42.5	Low
6	16	34	10	14	16	188	1656	44	F0	F0	—	—	24.8	—
7	979	236	112	183	180	1843	8492	63	F5	F5 & F6	41.3 & 1.3	143.8 & 12.6	156.5	High
8	113	24	61	20	57	32	871	36	F4	F4	0.5	1.4	14.9	Low
9	294	748	6	212	1348	242	2286	41	F3	F4	1.2	4.4	46.0	Low
10	163	106	9	298	1517	213	1303	58	F3	F3	0.5	8.6	31.8	High
11	151	8	8	151	10	86	1538	48	F0	F0	—	—	25.3	—
12	678	368	163	92	108	216	2211	52	F6	F6	0.5	5.8	43.5	High
13	893	724	1	6	18	350	2207	55	F1	F1	0.8	5.5	22.8	High
14	195	660	22	127	79	607	3674	50	F4	F4	40	100.9	102	High
15	440	522	183	31	62	428	1232	48	F6	F6	1.3	12.0	33.0	High
16	15	8	0	9	5	168	1549	53	F0	F0	—	—	24.3	—
17	1176	3426	0	1178	2931	299	3400	51	F2	F1 & F2	39.8 & 1.3	70.7 & 18.6	89.3	High
18	441	678	0	73	62	302	492	47	F1	F1	0.7	3.5	13.9	Low
19	358	260	5	66	55	4288	11492	38	F3	F3	37.8	187.5	192.1	High
20	1498	395	92	323	395	487	3176	42	F6	F5 & F6	0.4 & 1.2	2.8 & 17.1	68.8	Low/high