# Power networks/Norway

Power transmission lines

This is a subproject of the Norway mapping project where information about the infrastructure network in Norway is collected. Please help by adding more information.

## Goals

• Map all electric power distribution (power lines and substations).
• Map all electric power generators (power plants, wind parks...).
• Map all major telecommunication cables, i.e. fiber optic cables connecting Norway to the world.*

## Tagging conventions

### Power lines

• Power lines are mapped with one of two values. power=line is for all lines above 33kV and power=minor_line for 33kV and below.
• Most lines in Norway are AC and will have three cables=*.
• Some lines can have six or more cables=* and will therefore also have multiple circuits=*. There are exceptions where older double circuit lines have been combined to a single using 6 cables.
• Never create overlapping ways for each line (circuit), but instead add circuits=* and cables=* values.
• When adding multiple voltage=* values add the separate them with semicolon and order them highest to lowest (example: 100;50;25).

#### Notes

• Norges vassdrags- og energidirektorat (NVE) data will display multiple circuits on same towers as individual lines.
• Lines above 300kV often have multiple wires=* per cable. Most commonly two, but some have three. NVE and power companies often refer to them as "duplex" and "triplex". Some 300kV lines have been built with duplex or triplex and some lower voltage lines have been upgraded to be ready for future voltage increases. Finding this information may require surveying.
• Because of the close proximity of the wires they are prone to collecting more ice and snow during winter. To preempt problems some mountain crossings use a thicker single cable for segments of the power line.

#### Voltage notes

• The most common voltages used in Norway are 11kV, 22kV, 33kV, 45kV, 66kV, 132kV, 300kV and 420kV. This may differ between companies.
• 300kV and 420kV are pretty much the same as 275kV and 380(400)kV in other countries. They are reported as such due to operating at around 295kV and 410kV.
• NVE will have several different voltage values in their data. It depend on if the reported value is the nominal voltage or the isolation voltage.
• Common isolation values you might see are 145kV for lines operating at 132kV, 72kV for lines at 66kV and 24kV for lines operating at 22kV.
• To make things even more complicated some companies operate at odd voltages for parts of their grid:
• Agder Energi have two regional grids, one 132kV in the east and a 110kV in the west. This is not a tagging mistake.
• Some lines may be listed 60kV or 50kV. These are simply just 66kV and 45kV lines.

Example of a power line:

operator=BKK Nett
power=line
voltage=132000
cables=3

Example of extra tags when two lines share towers:

cables=6
circuits=2
voltage=value1;value2

#### Power pole vs. power tower

Poles are used for power=minor_line (33kV and below). Anything above that will use power=tower
Exception can be done on long 22kV crossings like fjords or valleys where the poles/towers on each side often are as big as regular 66kV or even 132kV towers.

## Status

Main focus so far has been on lines above 22kV. See here for a map of power in Norway: openinframap.org

Progress as of October 2019:

• Trøndelag complete >22kV
• Vestland complete >22kV.
• Møre og Romsdal complete >22kV.
• Hedmark complete >22kV
• Akershus complete >22kV.
• Østfold complete >22kV.
• Oppland complete >22kV.
• Buskerud complete ≥45kV.
• Telemark complete ≥66kV, except 132kV from Meen to Østfold area.
• Agder complete ≥66kV.
• Finnmark complete ≥33kV.
• Troms complete ≥66kV.
• Nordland complete ≥66kV.
• Rogaland have most lines, but with varying quality
• Vestfold have most lines, but with varying quality

Most power plants ≥10MW have been added in the same areas. Exception for smaller plants is made if they are directly connected to the regional lines.

Note that power lines are constantly being built or dismantled so it will never be 100% complete.