Operational Risk Assessment of Distribution Network Equipment Based on Rough Set and D-S Evidence Theory

Table 1

Operational risk assessment data of a transformer in a certain working condition.

ID	C2H2/C2H4	C2H4/C2H6	C2H6/C2H4	CH4/C2H4	C2H2/CH4	C2H2/C2H6	H2/(H2+hydrocarbon)	Risk level
1	1.231	0.765	0.596	2.192	0.561	0.941	0.355	1
2	0.055	6.455	1.100	0.141	0.390	0.355	0.065	1
3	0.074	0.257	2.763	1.407	0.053	0.019	0.461	2
4	0.000	0.588	0.642	2.650	0.000	0.000	0.837	2
5	1.141	1.873	0.245	2.179	0.524	2.136	0.580	2
6	0.348	12.760	0.183	0.428	0.813	4.444	0.269	3
7	1.189	7.944	0.269	0.469	2.537	9.444	0.457	3
8	1.455	14.000	0.103	0.695	2.093	0.364	0.204	3
9	0.000	1.059	0.611	1.544	0.000	0.000	0.010	4
10	0.007	2.545	0.266	1.476	0.005	0.018	0.332	4
11	0.003	1.500	0.467	1.429	0.002	0.005	0.122	4
12	0.017	18.218	0.146	0.375	0.045	0.309	0.159	5
13	0.000	5.739	0.110	1.500	0.000	0.000	0.303	5
14	0.029	11.429	0.124	0.708	0.041	0.333	0.201	5
15	0.049	4.727	0.515	0.411	0.113	0.219	0.113	5