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

Table 2

Local characteristic parameters of test signal.

Atoms	Amplitude	Frequency/Hz	Phase/rad	Start time/ms	End time/ms
1	9.0112	74.9841	−2.0125	—	186.7268
2	3.7921	50.1592	−2.2285	198.5703	—
3	2.8041	35.0319	−1.8173	207.8642	—