Abstract
Many mine power systems operate with a floating neutral or are high-resistance grounded, and earth fault current is no more than a few tens of amperes. Traditional earth-fault-detection methods based on zero-sequence current have poor sensitivity in this case. For improvement, a fault-detection scheme with fault-current and fault-resistance measurement is presented in this paper, which is capable of detecting high-impedance ground faults. The scheme has been verified by electromagnetic-transient-program simulation, and a fault-detection prototype has been developed and tested in the laboratory. Results show that the scheme has high sensitivity and robustness.
| Original language | English |
|---|---|
| Pages (from-to) | 424-429 |
| Number of pages | 6 |
| Journal | IEEE Transactions on Industry Applications |
| Volume | 44 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1 Mar 2008 |
Keywords
- Fault detection
- High-impedance ground faults (HIGFs)
- Mine power systems
- Protective relaying
ASJC Scopus subject areas
- Control and Systems Engineering
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering