Abstract
Denmark is taking on the exciting project of
undergrounding the electricity transmission grid. In
2009 it was decided by the Danish government to
underground large parts of the 400 kV and the entire
132-150 kV transmission network before the end of
2030. For ensuring network stability and economical
gain, such severe network changes necessitate correct
estimation and optimisation of load conditions in the
cable grid.
Both IEC and IEEE have published standards for rating
transmission cables' current carrying capacity. These
standards are based on assumptions of a number of
parameters, such as thermal conditions in and around the
cable, as well as the heat generated in conductors,
screens, armours etc., taking into account proximity and
skin effects.
The work performed and presented in this paper is
concerned with an improved determination of the losses
generated in the conductor, by means of better
calculation of the AC resistance of transmission cable
conductors, in particular regarding higher frequencies.
In this way, also losses under harmonics can be covered.
Furthermore, the model is suitable for modelling of
transient attenuation in high voltage cables. The AC
resistance is calculated based on the current density
distribution in different conductor designs by means of
the Finite Element Method (FEM). The obtained results
and methods are compared to available standards (IEC
publication 60287-1-1).
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 22nd Nordic Insulation Symposium |
| Number of pages | 202 |
| Publisher | Tampere University of Technology |
| Publication date | 2011 |
| Pages | 93-98 |
| ISBN (Print) | 978-952-15-2562-9 |
| Publication status | Published - 2011 |
| Event | 22nd Nordic Insulation Symposium - Tampere, Finland Duration: 1 Jan 2011 → … Conference number: 22 |
Conference
| Conference | 22nd Nordic Insulation Symposium |
|---|---|
| Number | 22 |
| Country/Territory | Finland |
| City | Tampere |
| Period | 01/01/2011 → … |