Abstract
A 3-D finite element harmonic field model of multi-conductor power cables placed on a perforated metal tray is established. Power loss densities of all metallic elements with the skin effect are obtained. By taking the power densities as a load, the direct thermal-fluid coupled model of the cable system is set up and temperature rises are calculated. Therefore, the magnetic field and the thermal-fluid field indirect coupled solution for the cable system is achieved. Because the conductor resistivity is affected by its temperature, the coupled model of the cable system becomes a bi-indirect coupled model between the magnetic field and the thermal-fluid field. Using an iterative procedure, the ampacity of the cable system can be solved with a high temperature 90°C. Using the examples of a non-armored cable with the single current and an armored cable with the mode of three-parallel cable, the total power losses, the hottest point temperature of conductors and the current distributions are calculated and tested by the indirect coupled method. The match of calculated and tested results illustrates that the bidirectional indirect coupled model is valid and accurate. And it can be used for analyzing magnetic and thermal properties of power cable systems.
| Original language | English |
|---|---|
| Pages (from-to) | 133-139 |
| Number of pages | 7 |
| Journal | Nanjing Hangkong Hangtian Daxue Xuebao/Journal of Nanjing University of Aeronautics and Astronautics |
| Volume | 42 |
| Issue number | 2 |
| Publication status | Published - 1 Apr 2010 |
Keywords
- Finite element method (FEM)
- Indirect coupled-field
- Power cable
- Power losses
- Temperature rises
ASJC Scopus subject areas
- Aerospace Engineering