Electric power supply system of railways in Norway
Encyclopedia
Norway, like Germany, Austria and Switzerland uses single phase 15 kV AC railway electrification at 16 2/3 Hz (precisely) for electric train systems. However there are differences in the supply of power.
Nearly all power is derived from rotary converters or static inverters in the substations, which are fed with three-phase AC of 50 Hertz from the public grid. There are only two power stations generating single phase AC. That at Kjofossen, feeds its power directly in the overhead wire, while that at Hakavik supplies a small 55 kV single phase AC network, which feeds five substations. However at two substations, there are also converters.
In earlier days, Nygårds Hydroelectric Power Station
Nygårds Hydroelectric Power Station
Nygårds Power Station is a hydroelectric power plant in Storelva in Narvik at . It has a power output of 75 MW generated by three vertical Francis turbines. Originally, it was used also for the generation of single phase AC for the railway, but today only three phase AC is produced.- External links...

 delivered single phase AC for line between Narvik and Kiruna. The single phase AC line running to Sweden is now used between 68°26′51"N 17°27′27"E and 68°25′33"N 18°0′15"E as the 15 kV line for feeding the overhead wire.

Description

From Haugevik Power Plant, two 55 kV long single phase AC powerlines depart, one to Sande and the other to Sundhaugen Switching Station.
At Sundhaugen Switching Station, the lines depart: one over Skollenborg railway substation and Noragutu Substation to Neslandsvatn Substation and the other to Asker substation, which has an interesting track. It runs from Sundhaugen Switching Station northward and shares north of Foss at 59°43′05"N 9°51′38"E the towers of a three phase AC lines.
It runs then eastwards and passes three substations:
  • Mjondalen at 59°44′41"N 10°01′02"E,
  • Langum at 59°44′48"N 10°06′46"E
  • Lierbyen at 59°47′43"N 10°15′10"E.

South of Ulvenvn substation at 59°48′20"N 10°20′13"E, it runs again on own towers overhead until termination tower at 59°49′26"N 10°24′33"E. The rest of line is underground.

Power Stations

Name Town Power Year of inauguration Coordinates
Hakavik
Hakavik Power Station
Hakavik Power Station is a hydroelectric power plant in Øvre Eiker, Norway with a power of 7 MW inaugurated in 1922.It generates only single phase AC for railway purpose and is the startpoint of a 55 kV- single phase AC powerline for traction current to Sande and an other to Sundhaugen Switching...

 
Øvre Eiker 7 MW 1922 59°37′29"N 9°57′13"E
Kjofossen
Kjofossen Power Station
Kjofossen Power Station is a hydroelectric power plant at Sogn og Fjordane, which was built during World War II. It was built in World War II and feeds its power partly in form of single phase AC with a frequency of 16.667 Hertz in the overhead wire of the railway to Bergen.- External links :*...

Sogn og Fjordane. 3.5 MW 194? 60°44′49"N 07°08′05"E



Substations fed from 55 kV Grid

Place Coordinates
Asker 59°49′48"N 10°25′46"E
Neslandsvatn 58°58′32"N 9°09′11"E
Nordagutu 59°25′8"N 9°19′19"E
Sande 59°35′1"N 10°12′55"E, east of powerline crosses railway line at 59°34′51"N 10°12′26"E
Skollenberg 59°37′21"N 9°41′32"E



Switching Stations

Place Coordinates
Sundhaugen 59°41′51"N 9°50′30"E



Substations with Converters

In Norway nearly all railway substations uses motor-generators which converts three phase AC from public grid into single phase AC. Most of these device are mounted on rail-cars for quick replacement. Some substations are in blind-ending tunnels.

The list may be incomplete and coordinates may be incorrect.
Place Technology Power Year of inauguration Coordinates
Alnabru 59°55′46"N 10°49′53"E
Asker 59°49′48"N 10°25′46"E
Bergen 60°23′12"N 5°20′19"E
Dale 60°34′55"N 5°48′24"E
Dombas 62°03′47"N 9°07′34"E
Fåberg 61°09′49"N 10°24′23"E
Fron 61°34′15"N 9°52′45"E
Ganddal 58°48′37"N 5°42′2"E
Haugastøl 60°30′41"N 7°52′21"E
Holmlia 59°49′42"N 10°47′55"E
Hønefoss 60°11′57"N 10°09′11"E
Jessheim 60°8′33"N 11°09′06"E
Kielland 58°29′42"N 6°01′58"E
Kongsvinger 60°11′26"N 11°59′11"E
Krossen 58°9′12"N 7°57′31"E
Larvik 59°2′55"N 10°3′45"E
Leivoll 58°16′01"N 7°27′09"E
Lillestrøm 59°57′12"N 11°03′28"E?
Lundamo 63°09′09"N 10°16′56"E?
Lunner 60°17′49"N 10°35′08"E
Mjøllfell 60°41′40"N 6°50′25"E
Narvik 68°24′15"N 17°46′51"E
Nelaug 58°39′33"N 8°37′39"E
Neslandsbyen 60°34′46"N 9°6′34"E
Nordagutu 59°25′8"N 9°19′19"E
Otta 61°46′58"N 9°32′32"E
Rudshøgda 60°54′57"N 10°49′16"E
Sarpborg 59°16′37"N 11°05′27"E
Sira 58°24′50"N 6°39′44"E
Smørbekk 59°30′12"N 10°42′56"E
Ski 59°43′11"N 10°50′0"E
Skoppum 59°22′40"N 10°24′36"E
Stavne 63°24′50"N 10°23′0"E
Tangen 60°37′26"N 11°15′16"E




External links

  • http://www.ee.kth.se/php/modules/publications/reports/2010/IR-EE-ES_2010_006.pdf
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