Research Article

Research on Low-Resistance Grounding Fault Line Selection Based on VMD with PE and K-Means Clustering Algorithm

Table 3

Calculation entropy of a real test field.

RNPELine 1Line 2Line 3

Different fault distances (L/km)510PE10.1350.5890.583
PE20.1260.5460.556
PE30.1310.1310.131
710PE10.1340.6060.609
PE20.1260.5420.553
PE30.1330.1310.130
515PE10.1380.5830.584
PE20.1260.5570.569
PE30.1330.1290.134
715PE10.1330.5930.598
PE20.1270.5460.557
PE30.1350.1290.133

Different transition resistances (Rg/Ω)Metallic ground10PE10.1350.5890.583
PE20.1260.5460.556
PE30.1310.1310.131
5010PE10.1330.5610.568
PE20.1260.4630.473
PE30.1290.1270.127
10010PE10.1330.5720.579
PE20.1260.5060.517
PE30.1320.1270.128
50010PE10.1360.5940.596
PE20.1260.5380.546
PE30.1320.1290.128
100010PE10.1350.6040.600
PE20.1270.5520.550
PE30.1320.1290.129
200010PE10.1320.6020.614
PE20.1270.4430.436
PE30.1320.1340.135
Metallic ground15PE10.1380.5830.584
PE20.1260.5570.569
PE30.1330.1290.134
5015PE10.1330.5620.576
PE20.1260.4570.481
PE30.1280.1280.130
10015PE10.1330.5710.587
PE20.1270.4680.479
PE30.1320.1280.129
50015PE10.1320.5990.591
PE20.1260.4780.486
PE30.1320.1280.128
100015PE10.1320.5980.585
PE20.1260.4820.485
PE30.1320.1270.128
200015PE10.1330.5980.590
PE20.1250.4920.489
PE30.1330.1280.130
High resistance arc grounding10PE10.1360.5790.586
PE20.1260.5230.550
PE30.1270.1340.136
15PE10.1340.5850.589
PE20.1270.5470.568
PE30.1310.1320.141