The successful operation of the cable makes us hopeful it can be used for large capacity transmission. Our test line is composed of aluminium stranded hollow conductor, liquid-nitrogen impregnated polyethylene paper electrical insulation, and polyurethane foam thermal insulation.
Power losses of liquid nitrogen cooled high-current cables
โ Scribed by I. Heller
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 256 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0011-2275
No coin nor oath required. For personal study only.
โฆ Synopsis
This paper surveys the experimental and theoretical investigations on current induced losses of high power cables. Measurements on compact and tube conductor cable models have been carried out at room temperature and liquid nitrogen temperature (77 K). Further measurements on a 2000 mm 2 fully transposed litz conductor have been performed. Using the experimental results published, the methods of calculation have been tested with regard to the applicability at very large conductor cross-section or high conductiwty. If necessary, improvements of the methods of calculation are suggested.
๐ SIMILAR VOLUMES
A 66 k V fiquid nitrogen cooled cryogenic cable was manufactured and tested using ac and impulse voltages. Liquid nitrogen cooled cryogenic cables will be in practical use over the 275-500 k V range. Study of the 66 kV class cable is the first step towards this development. The insulation system of
The temperature distribution and power loss of a gas-cooled current lead have been studied. The physical properties of the gas and the lead are functions of temperature. Results for various gas flows, current densities, and lead lengths are presented.
The maximum heat flux density and the corresponding temperature drop during nucleate boiling of liquid nitrogen on the surface of high temperature superconductor ceramic samples were studied over a wide range of pressures. The experiments were performed during pool and narrow gap channel boiling. Th
To overcome the low threshold against disturbance usually observed in high current density, close-packed magnets, it was proposed to introduce narrow liquid helium channel cooling into the winding. Several magnets with winding inner diameters ranging from 8 to 60 cm were constructed and tested. The