Fault Line Selection Method of Small Current to Ground System Based on Atomic Sparse Decomposition and Extreme Learning Machine

Table 1

Characteristic parameters of every atom.

Atoms	Scale; /pu	Location shift; /pu	Frequency shift; /Hz	Phase/rad	Atom amplitude
1	227.6520	72.9008	0.4709	−2.0125	0.0903
2	308.3047	352.7226	0.3150	−2.2285	0.0380
3	316.8729	366.3006	0.2200	−1.8173	0.0281