Electric railways in Sweden are powered from a single-phase AC supply of 16 2/3 Hz, as used in Germany, Austria and Switzerland. Unlike these countries, the 132 kV traction current grid covers only part of the country, approximately north of Stockholm. This grid is fed by frequency converters and has no generation nor transmission lines from Norway, which uses the same traction current system. Formerly, the Porjus Hydroelectric Power Station

Porjus Hydroelectric Power Station

Porjus power station is one of the oldest and largest power plants in Sweden, situated near Porjus. It was built 1910-1915 and has a power of 440 MW. Besides three-phase AC, the plant originally also generated single phase 15 Hz AC for railway traction and hence, two single-phase 80 kV power lines...

 provided electric power to the traction network. In the future the Älvkarleby Hydroelectric Power Station

Älvkarleby Hydroelectric Power Station

Älvkarleby Hydroelectric Power Plant is a hydroelectric power plant with 5 Francis turbines at Älvkarleby, Sweden. It was built in 1911. From 1988-1991 a new power plant with a single Francis turbine was added, increasing its generation power from 70 MW to 126 MW....

 may be connected to the traction network, as this would increase stability of the power grid of the railway system.
Separate from the 132 kV grid is a 30 kV line connection between Mon and Varp substation north of Gothenburg.

Also the overhead wire system has some differences. It is common, that the pylons for the overhead wire carry also a three phase single AC system. In order to reduce counts of substations, the voltage at the substations for the overhead wire is 32 kV at some lines ( AT-System). However trains require 16 kV and therefore auto transformers are used, which have a central connection connected with the grounded railway, while the other connections are connected to the 32 kV output. The voltage between this central connection to the phase is so 16 kV. The other pole has also 16 kV to ground, but from opposite polarity and runs along the track on the overhead wires until separation section.
Other lines are fed directly with 16 kV from the substations. However differential transformers are used for feeding, in order to eliminate jamming signals.

Decentralized Converter Stations

Converter Stations only feeding power into overhead wire.

Place	County	Technology	Power	Year of inauguration	Coordinates
Alingsås Alingsås Alingsås is a locality and the seat of Alingsås Municipality in Västra Götaland County, Sweden. It had 22,919 inhabitants in 2005.-Geography:...	Älvsborg	Rotary Converter, Static Inverter			57°55′37"N 12°30′39"E
Alvesta Alvesta Alvesta is a locality and the seat of Alvesta Municipality in Kronoberg County, Sweden, with 7,647 inhabitants in 2005.Alvesta is an important railway junction, joining the Stockholm–Malmö–Copenhagen railway with the Gothenburg–Kalmar/Karlskrona railway.- References :...	Kronoberg	Rotary Converter			56°52′58"N 14°32′29"E
Älvsjön	Stockholm	Static Inverter			59°17′25"N 18°01′19"E
Åstorp Åstorp Åstorp is a bimunicipal locality and the seat of Åstorp Municipality in Skåne County, Sweden with 8,514 inhabitants in 2005. It is also partly located in Ängelholm Municipality.-Overview:...	Kristianstad	Static Inverter			56°07′33"N 12°56′37"E
Duved	Jämtland	Rotary Converter			63°23′23"N 12°54′19"E
Eksund	Östergötland	Static Inverter			58°35′13"N 16°05′45"E
Eldsberga Eldsberga Eldsberga is a locality situated in Halmstad Municipality, Halland County, Sweden, with 717 inhabitants in 2005....	Halland	Static Inverter			56°35′29"N 12°59′55"E
Emmaboda Emmaboda -Geography:Emmaboda is located in the middle of the Tri-City Region Växjö, Kalmar and Karlskrona. All three places are sixty kilometers from Emmaboda.-Culture:...	Kalmar	Rotary Converter			56°37′56"N 15°30′58"E
Eskilstuna Eskilstuna Eskilstuna is a city and the seat of Eskilstuna Municipality, Södermanland County, Sweden with 60,185 inhabitants in 2005. Eskilstuna has a large Sweden Finn population....	Södermanland	Static Inverter			59°22′41"N 16°29′13"E
Falköping Falköping Falköping is a locality and the seat of Falköping Municipality, Västra Götaland County, Sweden. It had 15,821 inhabitants in 2005.-History:The city of Falköping most likely emerged during the 15th century but earlier the town was an important site of pilgrimage due to its 12th century church...	Skaraborg	Rotary Converter			58°10′03"N 13°32′16"E
Gällivare Gällivare Gällivare is a locality and the seat of Gällivare Municipality in Norrbotten County, Sweden with 8,480 inhabitants in 2005. The town was founded in the 17th century...	Norrbotten	Rotary Converter			67°08′34"N 20°38′00"E
Hässleholm Hässleholm Hässleholm is a locality and the seat of Hässleholm Municipality, Skåne County, Sweden with 17,730 inhabitants in 2005.-Overview:Hässleholm was gradually developed from 1860 in connection with the construction of the main Stockholm to Malmö railway line. There was no settlement on the spot before...	Kristianstad	Rotary Converter, Static Inverter			56°10′39"N 13°46′33"E
Jakobshyttan	Östergötland	Rotary Converter			58°47′41"N 15°09′46"E
Järna Järna Järna is a locality situated in Södertälje Municipality, Stockholm County, Sweden with 6284 inhabitants in 2005.Järna has long been the centre of the anthroposophical movement in Sweden, and there is a private clinic, several schools and other institutions affiliated with the movement...	Stockholm	Static Inverter			59°03′57"N 17°31′36"E
Kil	Värmland	Rotary Converter			59°30′07"N 13°20′29"E
Kiruna Kiruna Kiruna is the northernmost city in Sweden, situated in Lapland province, with 18,154 inhabitants in 2005. It is the seat of Kiruna Municipality Kiruna (Northern Sami: Giron, Finnish: Kiiruna) is the northernmost city in Sweden, situated in Lapland province, with 18,154 inhabitants in 2005. It is...	Norrbotten	Rotary Converter			67°50′29"N 20°13′29"E
Kristinehamn Kristinehamn Kristinehamn is a locality and the seat of Kristinehamn Municipality, Värmland County, Sweden with 17,836 inhabitants in 2005.- Geography :Kristinehamn is situated by the shores of lake Vänern...	Värmland	Rotary Converter			?
Malmö Malmö Malmö , in the southernmost province of Scania, is the third most populous city in Sweden, after Stockholm and Gothenburg.Malmö is the seat of Malmö Municipality and the capital of Skåne County...	Malmöhus	Static Inverter			55°36′34"N 13°01′30"E
Mellerud Mellerud Mellerud is a locality and the seat of Mellerud Municipality, Västra Götaland County, Sweden. It had 3,796 inhabitants in 2005.- References :...	Älvsborg	Rotary Converter			58°41′48"N 12°25′28"E
Mjölby Mjölby Mjölby is a city and the seat of Mjölby Municipality, Östergötland County, Sweden with 11,927 inhabitants in 2005.Mjölby is located by the rivulet Svartån. The name "Mjölby" is derived from "Mölloby", which comes from mylna or mölna -- meaning "mill"...	Östergötland	Rotary Converter			58°19′56"N 15°08′50"E
Moholm Moholm Moholm is a locality situated in Töreboda Municipality, Västra Götaland County, Sweden with 664 inhabitants in 2005....	Skaraborg	Rotary Converter, Static Inverter			58°36′45"N 14°02′30"E
Mora Mora -People:* Alberto J. Mora , General Counsel of the United States Navy * Alfonso Mora , Venezuelan former tennis player* Bruno Mora , Italian football player and coach* Cristian Mora , Ecuadorian football goalkeeper...	Dalarna	Rotary Converter			61°00′07"N 14°34′50"E
Murjek Murjek Murjek is a village situated in Jokkmokk Municipality, Norrbotten County, Sweden with 83 inhabitants in 2005..The village is a popular train stop for hikers and tourists, as buses to Kvikkjokk go from Murjek. Kvikkjokk is a common starting point for hikes into Sarek National Park....	Norrbotten	Rotary Converter			66°28′04"N 20°53′02"E
Nässjö Nässjö Nässjö is a locality and the seat of Nässjö Municipality, Jönköping County, Sweden with 16,463 inhabitants in 2005.-History:Nässjö was for a long time only a rural village with agriculture as the dominant occupation. The turning point was the construction of the Swedish railway system. The southern...	Jönköping	Static Inverter			57°39′40"N 14°40′15"E
Nyköping Nyköping Nyköping is a locality and the seat of Nyköping Municipality, Södermanland County, Sweden with 32,427 inhabitants in 2005. The city is also the capital of Södermanland County.- History :...	Södermanland	Rotary Converter			58°45′29"N 16°58′20"E
Olskroken	Göteborgs och Bohus	Static Inverter			57°43′23"N 12°00′17"E
Ösmo Ösmo Ösmo is a locality situated in Nynäshamn Municipality, Stockholm County, Sweden with 3,606 inhabitants in 2005. It has a station on the Stockholm commuter rail network, Nynäshamn line .- References :...	Stockholm	Rotary Converter			58°58′31"N 17°53′57"E
Östersund Östersund Östersund is an urban area in Jämtland in the middle of Sweden. It is the seat of Östersund Municipality and the capital of Jämtland County. Östersund is located at the shores of Sweden's fifth largest lake, Storsjön, opposite the island Frösön, and is the only city in Jämtland. Östersund is the...	Jämtland	Rotary Converter			63°09′28"N 14°39′50"E
Ottebol	Värmland	Rotary Converter			59°41′50"N 12°28′08"E
Ramvik Ramvik Ramvik is a bimunicipal locality situated in Härnösand Municipality and Kramfors Municipality in Västernorrland County, Sweden with 746 inhabitants in 2005.- References :...	Västernorrland	Rotary Converter			?
Sjömarken Sjömarken Sjömarken is a locality situated in Borås Municipality, Västra Götaland County, Sweden. It had 2,596 inhabitants in 2005.Here you can find a pizzeria, two kiosks, an antique store, a commune office, a boat store, a squash hall, and a very active sports club, with football and table tennis as main...	Älvsborg	Rotary Converter			57°42′44"N 12°51′36"E
Sköldinge Sköldinge Sköldinge is a locality situated in Katrineholm Municipality, Södermanland County, Sweden with 630 inhabitants in 2005....	Södermanland	Rotary Converter			59°01′58"N 16°29′00"E
Stenbacken	Norrbotten	Rotary Converter			68°15′00"N 19°30′01"E
Tornehamn	Norrbotten	Rotary Converter			68°26′03"N 18°35′42"E
Uddevalla Uddevalla Uddevalla is a city and the seat of Uddevalla Municipality, Västra Götaland County, Sweden with 30,513 inhabitants in 2005.It is located at the bay Byfjorden, of the south-eastern part of the sea known as Skagerrak...	Västra Götaland	Rotary Converter			?
Varberg Varberg Varberg is a locality and the seat of Varberg Municipality, Halland County, Sweden with 26,041 inhabitants in 2005.Varberg and all of Halland are well known for their 'typical west coast' sandy beaches. In Varberg the coast changes from wide sandy beaches to rocky terrain that continues north into...	Halland	Rotary Converter			57°09′07"N 12°16′54"E?
Västerås Västerås Västerås is a city in central Sweden, located on the shore of Lake Mälaren in the province Västmanland, some 100 km west of Stockholm...	Västmanland	Static Inverter			59°38′52"N 16°34′57"E
Ystad Ystad Ystad is a "locality", or town, and the seat of Ystad Municipality, Skåne County, Sweden, with 17,286 inhabitants .Settlement dates back to the 11th century and the town has become a busy ferryport, local administrative centre and tourist attraction...	Skåne	Static Inverter			?

Centralized Converter Stations

Converter Stations, which also feed power into 132 kV single phase AC grid.

Place	County	Technology	Power	Year of inauguration	Coordinates
Änge Änge Änge is a locality situated in Krokom Municipality, Jämtland County, Sweden with 387 inhabitants in 2005. It is situated 50 kilometres northwest of Östersund, the capital of Jämtland. Änge was until 1974 the seat of the former municipality Offerdal.- References :...	Västernorrland	Static Inverter			62°31′22"N 15°40′39"E
Baluträsk	Västerbotten	Static Inverter			64°47′1"N 20°2′31"E
Borlänge Borlänge Borlänge is a locality and the seat of Borlänge Municipality in Dalarna County, Sweden, with 49200 inhabitants in 2011.- History :Originally Borlänge was the name of a tiny village, and the first historical information about it is from 1390. The village was insignificant up until about 1870...	Dalarna	Static Inverter			60°28′0"N 15°26′7"E
Boden Boden, Sweden Boden is a locality and the seat of Boden Municipality in Norrbotten County, Sweden with 18,680 inhabitants in 2005.- History :The town of Boden started as a railway junction where the Northern Line met with the Ore Line from the rich iron ore fields in northern Sweden.The town experienced...	Norrbotten	Static Inverter/ Rotary Converter			65°46′57"N 21°44′39"E
Häggvik	Stockholm	Rotary Converter			59°26′53"N 17°55′32"E
Mellansel Mellansel Mellansel is a locality situated in Örnsköldsvik Municipality, Västernorrland County, Sweden with 823 inhabitants in 2005.- References :...	Västernorrland	Static Inverter			63°26′1"N 18°20′43"E
Ockelbo Ockelbo Ockelbo is a locality and the seat of Ockelbo Municipality, Gävleborg County, Sweden with 2,709 inhabitants in 2005.The name Ockelbo, spelt "De oklabo" in 1314, contains an old marine name *Ukle, referring to modern- day lake Bysjön. The name derives from the old Swedish word "ukla" meaning swell,...	Gävleborg	Static Inverter			60°56′28"N 16°42′29"E

Substations

Substations fed from 132 kV single phase AC grid.

Place	County	Coordinates
Bäckhaga	Örebro	59°45′55"N 15°7′14"E
Bispgården	Jämtland	63°1′56"N 16°33′57"E
Dalstorp Dalstorp Dalstorp is a locality situated in Tranemo Municipality, Västra Götaland County, Sweden with 779 inhabitants in 2005....	Västerbotten	64°26′5"N 19°42′54"E
Dockmyr	Jämtland	62°57′23"N 15°45′0"E
Frövi Frövi Frövi is a locality situated in Lindesberg Municipality, Örebro County, Sweden with 2,493 inhabitants in 2005....	Örebro	59°28′18"N 15°21′19"E
Gävle Gävle Gävle is a city in Sweden, the seat of Gävle Municipality and the capital of Gävleborg County. It had 71,033 inhabitants in 12/31 2010. It is the oldest city in the historical Norrland , having received its charter in 1446 from Christopher of Bavaria.-History:It is believed that the name Gävle...	Gävleborg	60°39′11"N 17°10′48"E
Gnarp Gnarp Gnarp is a locality situated in Nordanstig Municipality, Gävleborg County, Sweden with 999 inhabitants in 2005....	Gävleborg	62°1′38"N 17°15′8"E
Habo Habo Habo is a locality and the seat of Habo Municipality, Jönköping County, Sweden with 6,244 inhabitants in 2005. Habo Church lies around 4km to the south-west.- References :...	Uppsala	59°35′9"N 17°29′1"E
Holmsjön	Västernorrland	63°23′8"N 17°41′18"E
Hudiksvall Hudiksvall Hudiksvall is a city and the seat of Hudiksvall Municipality, in Hälsingland, Gävleborg County, Sweden with 14,850 inhabitants in 2005. Hudiksvall is also known as Glada Hudik , a term that originated in the 19th century as word spread of its friendly hospitality and its lively social life...	Gävleborg	61°42′3"N 17°5′37"E
Jönssen	Gävleborg	61°16′12"N 16°30′18"E
Jörn Jörn Jörn is a locality situated in Skellefteå Municipality, Västerbotten County, Sweden with 877 inhabitants in 2005....	Västerbotten	65°3′53"N 20°2′26"E
Kullsbjörken	Dalarna	60°50′00"N 15°4′59"E
Ljusdal Ljusdal Ljusdal is a locality and the seat of Ljusdal Municipality, Gävleborg County, Sweden with 6,100 inhabitants in 2005.Ljusdal is located beside the river Ljusnan which goes from Bruksvallarna to Ljusne....	Gävleborg	61°47′55"N 16°9′44"E
Ludvika Ludvika Ludvika is a bimunicipal locality and the seat of Ludvika Municipality, Dalarna County, Sweden, with 14,018 inhabitants in 2005.-Overview:The conurbation of Ludvika extends over the border of Smedjebacken Municipality, where about 400 inhabitants live....	Dalarna	60°9′9"N 15°14′57"E
Längträsk	Norrbotten	65°22′26"N 20°20′3"E
Norrfors	Västerbotten	63°46′5"N 19°0′27"E
Odensala	Stockholm	59°40′23"N 17°50′5"E
Ramsjö Ramsjö Ramsjö is a village in Ljusdal Municipality, Hälsingland, Gävleborg County, Sweden with about 306 inhabitants. ....	Gävleborg	62°11′19"N 15°40′14"E
Ryggen	Dalarna	60°35′18"N 15°49′21"E
Storvik Storvik Storvik is a locality situated in Sandviken Municipality, Gävleborg County, Sweden with 2,251 inhabitants in 2005....	Gävleborg	60°34′39"N 16°29′1"E
Sundsvall Sundsvall -External links:* - Official site from Nordisk Familjebok - Sundsvalls tourist information bureau. - The alternative guide to Sundsvall. - Blog with photos from Sundsvall....	Västernorrland	62°24′0"N 17°14′29"E
Söderhamn Söderhamn Söderhamn is a locality and the seat of Söderhamn Municipality, Gävleborg County, Sweden with 12,056 inhabitants in 2005.The most popular tourist attraction is Oskarsborg, a tower built in 1895 on the top of a hill close to the town centre. The tower is built as a memorial over a visit of king...	Gävleborg	61°18′6"N 17°1′30"E
Tierp Tierp Tierp is a locality and the seat of Tierp Municipality, Uppsala County, Sweden with 5,377 inhabitants in 2005. There is a saying that in Tierp the birds fly upside down.-Communications:...	Uppsala	60°19′30"N 17°32′6"E
Uppsala Uppsala - Economy :Today Uppsala is well established in medical research and recognized for its leading position in biotechnology.*Abbott Medical Optics *GE Healthcare*Pfizer *Phadia, an offshoot of Pharmacia*Fresenius*Q-Med...	Uppsala	59°51′13"N 17°39′27"E
Viskan Viskan Viskan is a river in the south west of Sweden. It is about 140 kilometers long. It starts in the lake Tolken outside Ulricehamn and has its outlet in the Kattegatt. It runs through Borås. The name means Whisper River....	Västernorrland	62°25′52"N 16°28′2"E
Vännäs Vännäs Vännäs, from Wendenäs, ‘where the river changes it path’ is a locality that have existed since 1539. Vännäs is the seat of Vännäs Municipality in Västerbotten County, Sweden and had roughly 4,100 inhabitants in 2005....	Västerbotten	63°55′9"N 19°44′48"E
Älvsbyn Älvsbyn Älvsbyn is a locality and the seat of Älvsbyn Municipality in Norrbotten County, Sweden with 5,042 inhabitants in 2005.Älvsbyn has a railway station that is served by trains running between Boden and Stockholm along the Swedish east coast. It also features a Youth Hostel with a small recreational...	Norrbotten	65°40′28"N 20°58′37"E
Österraden	Västernorrland	63°13′15"N 17°11′47"E

30 kV-line Mon-Varp

Endpoints of 30 kV-interconnection Mon-Varp.

Place	County	Coordinates
Mon Mon -Places:* Mon State, a subdivision of Burma* Mon, Nagaland, a town in India* Mon District, Nagaland, India* Mon, Switzerland, a village in the Grisons* Isle of Anglesey or Môn, an island and county of Wales* Møn, an island of Denmark...	Älvsborg	58°54′34"N 11°45′15"E
Varp	Göteborgs och Bohus	58°53′16"N 11°17′25"E

Other remarkable points

Crossing-point of traction current power line and HVDC Fenno-Skan

Fenno-Skan

Fenno–Skan is the designation of the high voltage direct current transmission between Dannebo in Sweden and Rauma in Finland.-History:Fenno–Skan was inaugurated in 1989. Taken into commercial operation in November 1989, Fenno–Skan was the longest submarine power cable in the world...

2 ( only crossing point of HVDC overhead line and single-phase AC overhead powerline in the world): 60°28′46"N 17°14′12"E.

External links

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