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Protection and Control of Modern Power Systems

Table 2 Magnetic field errors at different angles

From: Grounding fault location method of overhead line based on dual-axis magnetic field trajectory

|ΔB| (%)

A phase

B phase

C phase

(O'–O'5°)x

0.2432

0.0012

0.2246

(O'–O'25°)x

1.3664

0.0322

0.9063

(O'–O'50°)x

2.9253

0.1227

1.1964

(O'–O'5°)y

0.1617

0.0010/0

0.1399

(O'–O'25°)y

0.9749

0.0049/0

0.4916

(O'–O'50°)y

2.2414

0.0087/0

0.4236

  1. 0.0010/0, 0.0049/0, 0.0087/0 indicates that the v is 0.0010, 0.0049, 0.0087 at O'5°, O'25°, O'50° respectively, and is 0 at O'
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