Table 5 Characteristic quantity of magnetic field ellipse
From: Grounding fault location method of overhead line based on dual-axis magnetic field trajectory
Grounding impedance | Location | Major axis | Minor axis | Inclination angle | |
|---|---|---|---|---|---|
Degrees | Cosine ratio | ||||
5Ω | Upstream | 62.81 | 10.44 | 64.56° | − 0.46 |
Downstream | 22.18 | 11.31 | 157.83° | ||
100Ω | Upstream | 18.65 | 7.89 | 82.45° | − 0.91 |
Downstream | 14.02 | 10.10 | 98.31° | ||
500Ω | Upstream | 14.89 | 8.47 | 87.11° | − 2.80 |
Downstream | 13.94 | 9.02 | 91.03° | ||
1000Ω | Upstream | 14.41 | 8.59 | 88.54° | − 1.12 |
Downstream | 13.95 | 8.89 | 91.30° | ||