Stepped Fault Line Selection Method Based on Spectral Kurtosis and Relative Energy Entropy of Small Current to Ground System

Table 9

SK relative energy entropy with different intensity noise (𝜃=0^∘, 𝑅=20Ω).

SNR/dB	Fault line	SK relative energy entropy 𝐶𝑗				Entropy multiple 𝛽	Results
		S1	S2	S3	S4
−1.5678	Overhead line S1	3.0665	1.2711	1.3520	2.7091	2.41 > 2	S1
	Cable line S4	0.9898	0.8089	4.5347	5.6922	1.22 < 2	S4
−5.5678	Overhead line S1	2.9061	1.1725	1.8192	2.7349	2.48 > 2	S1
	Cable line S4	0.9375	0.5388	3.7573	5.2826	1.74 < 2	S4
−10.5678	Overhead line S1	2.8449	1.0359	1.7698	2.4071	2.75 > 2	S1
	Cable line S4	0.8267	0.4481	3.4586	3.9673	1.84 < 2	S4
−13.5678	Overhead line S1	2.6814	0.6951	2.0311	2.1538	3.86 > 2	S1
	Cable line S4	1.1979	0.7646	4.5726	5.8559	1.57 < 2	S4