page_title: Nelson River DC Transmission System
hierarchical_section_title: Nelson River DC Transmission System
caption_attribution_description: English: Entrance to the Manitoba Hydro Dorsey Converter Station near Rosser, Manitoba, Canada.
context_page_description: The Nelson River DC Transmission System, also known as the Manitoba Bipole, is an electric power transmission system of two high voltage, direct current lines in Manitoba, Canada, operated by Manitoba Hydro as part of the Nelson River Hydroelectric Project. It is now recorded on the list of IEEE Milestones in electrical engineering. Several records have been broken by successive phases of the project, including the largest mercury-arc valves, the highest DC transmission voltage and the first use of water-cooled thyristor valves in HVDC.
  The system transfers electric power generated by several hydroelectric power stations along the Nelson River in Northern Manitoba across the wilderness to the populated areas in the south.
  It includes two rectifier stations, Radisson Converter Station near Gillam at 56°21′41″N 94°36′48″W and Henday Converter Station near Sundance at 56°30′14″N 94°08′24″W, one inverter station, Dorsey Converter Station at Rosser located 26 kilometres north west of Winnipeg at 49°59′34″N 97°25′42″W, and two sets of high-voltage direct current transmission lines. Each HVDC transmission line has two parallel overhead conductors to carry the positive and negative feeds.
context_section_description: The Nelson River DC Transmission System, also known as the Manitoba Bipole, is an electric power transmission system of two high voltage, direct current lines in Manitoba, Canada, operated by Manitoba Hydro as part of the Nelson River Hydroelectric Project. It is now recorded on the list of IEEE Milestones in electrical engineering.  Several records have been broken by successive phases of the project, including the largest (and last) mercury-arc valves, the highest DC transmission voltage and the first use of water-cooled thyristor valves in HVDC.
  The system transfers electric power generated by several hydroelectric power stations along the Nelson River in Northern Manitoba across the wilderness to the populated areas in the south.
  It includes two rectifier stations, Radisson Converter Station near Gillam at 56°21′41″N 94°36′48″W and Henday Converter Station near Sundance at 56°30′14″N 94°08′24″W, one inverter station, Dorsey Converter Station at Rosser located 26 kilometres (16 mi) north west of Winnipeg at 49°59′34″N 97°25′42″W), and two sets of high-voltage direct current transmission lines.  Each HVDC transmission line has two parallel overhead conductors to carry the positive and negative feeds.
  A third line, Bipole 3, was completed in 2018, running from the new  Keewatinoow Converter Station along the west side of Lake Manitoba to the new Riel Converter station on the east side of Winnipeg.  
  There are no intermediate switching stations or taps.  All three bipolar systems have extensive ground return electrodes to allow use in monopolar mode.
caption: Dorsey Converter Station near Rosser, Manitoba – August, 2005
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