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

Table 12

EMD relative energy entropy.

Fault line	𝜃	𝑅/Ω	EMD relative energy entropy 𝐶𝑗				Entropy multiple 𝛽	Results	Right?
			S1	S2	S3	S4
Overhead line S2	0°	20	1.9112	4.5143	5.1857	4.9335	2.36 > 2	S2	Y
		200	0.8032	3.8554	5.9764	4.8981	4.80 > 2	S2	Y
	150°	20	2.0273	4.4264	5.7486	4.3812	2.18 > 2	S2	Y
		200	0.9719	4.1269	6.8780	6.2598	4.25 > 2	S2	Y
Hybrid line S3	0°	20	0.7617	1.1209	4.8099	2.8481	1.47 < 2	S3	Y
		200	0.6714	0.9501	4.7789	2.9695	1.12 < 2	S3	Y
	150°	20	1.0806	1.5968	5.3013	4.0003	1.48 < 2	S3	Y
		200	0.7927	1.3501	5.0642	2.7225	1.70 < 2	S3	Y
Cable line S4	0°	20	0.5502	0.9428	5.4257	4.2543	1.71 < 2	S4	Y
		200	0.2029	0.7532	2.0443	3.7942	3.71 > 2	S2	N
	150°	20	0.2706	0.3861	4.8885	4.0831	1.43 < 2	S3	N
		200	0.3037	1.5814	4.2905	5.5391	5.21 > 2	S2	N