Abstract
Cable ampacity issues have been dealt with for a long time and our own involvement, in large part to provide information of local relevance to the cable industry and power companies in Finland, is quite recent. Nevertheless, in investigating the local environmental conditions of underground HV and MV cables, a number of practical issues worth stressing have come up. Further, in acknowledgement of the difficulty in knowing th
e actual thermal conditions of a cable at any given point in time, a simple temperature monitoring system has been devised, based on on-line current
and cable surface temperature measurements. This monitoring system involves a simple transient algorithm that enables quite accurate prediction of the conductor temperature. The conductor temperature corresponds to the maximum temperature of the insulation, and is therefore the critical parameter in determining the current rating of a power cable.
This paper therefore follows two main themes. In order to highlight an area that is easily overlooked in practical cable installation, the effect of the native soil environment of a typical HV cable installation is investigated. The other aim is
to provide some practical advice on the installation of the temperature monitoring system, which may be based on surface temperature measurements or distributed optical fibre temperature sensing located inside the cable sheath. Finite element method modelling was used in the simulations that provide the material for this paper.
e actual thermal conditions of a cable at any given point in time, a simple temperature monitoring system has been devised, based on on-line current
and cable surface temperature measurements. This monitoring system involves a simple transient algorithm that enables quite accurate prediction of the conductor temperature. The conductor temperature corresponds to the maximum temperature of the insulation, and is therefore the critical parameter in determining the current rating of a power cable.
This paper therefore follows two main themes. In order to highlight an area that is easily overlooked in practical cable installation, the effect of the native soil environment of a typical HV cable installation is investigated. The other aim is
to provide some practical advice on the installation of the temperature monitoring system, which may be based on surface temperature measurements or distributed optical fibre temperature sensing located inside the cable sheath. Finite element method modelling was used in the simulations that provide the material for this paper.
| Original language | English |
|---|---|
| Title of host publication | CIRED, 17th International Conference & Exhibition on Electricity Distribution, Barcelona, Spain, May 12 15, 2003 |
| Number of pages | 5 |
| Publication status | Published - 2003 |
| MoE publication type | A4 Conference publication |
| Event | International Conference and Exhibition on Electricity Distribution - Duration: 1 Jan 1900 → … |
Conference
| Conference | International Conference and Exhibition on Electricity Distribution |
|---|---|
| Abbreviated title | CIRED |
| Period | 01/01/1900 → … |