Abstract
A current-carrying parallel-helix-filament model and some simplified formulas were proposed to explain the patterns of the magnetic fields around multi-core power cables and to evaluate such fields. The purpose is to validate the effectiveness of the proposed model and to evaluate the accuracy of these simplified formulas. A numerical program based on the theoretical model and the Biot-Savart Law was proposed. Numerical calculations and laboratory measurements of the magnetic fields around some 4-core cables were carried out. The validity of the model is validated through comparisons among the model predicted value, the numerical results, and the measured data. It is found that the simplified formulas are highly accurate in predicting the magnetic fields in the space 0.2 m away from the cable. In addition, the influences of some cable parameters on the magnetic fields were analyzed. The magnetic field impact of unbalanced currents and harmonic currents was also discussed. Magnetic field cancellation can be observed when several multi-core cables are installed in parallel.
| Original language | English |
|---|---|
| Pages (from-to) | 243-247 |
| Number of pages | 5 |
| Journal | Shanghai Jiaotong Daxue Xuebao/Journal of Shanghai Jiaotong University |
| Volume | 36 |
| Issue number | 2 |
| Publication status | Published - 1 Feb 2002 |
| Externally published | Yes |
Keywords
- Electromagnetic compatibility
- Extremely low frequency magnetic field
- Low voltage distribution system
- Multi-core power cable
ASJC Scopus subject areas
- General