Fault Identification of UHVDC Transmission Based on DF-AD and Ensemble Learning

Table 5

Feature selection results.

Number	Feature label	DF value	AD value	Entropy
1	25	1	Second	Skewness
2	26	1	Second	Maximum
3	27	1	Second	Minimum
4	37	2	Signal	Energy
5	50	2	First	Norm
6	96	4	Second	Mean
7	99	4	Second	Minimum
8	119	8	First	Shannon
9	172	16	Third	Energy
10	173	16	Third	Shannon
11	178	16	Third	Skewness
12	181	32	Signal	Energy