Nelson River DC Transmission System
Nelson River Bipoles 1 and 2 terminate at Dorsey Converter Station near Rosser, Manitoba. The station takes HVDC current and converts it to HVAC current for re-distribution to consumers
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Map of NR HVDC Transmission
Bipole 1 |
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| Country | Canada |
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| Province | Manitoba |
| From | Radisson Converter Station near Gillam at 56°21′39″N 94°36′47″W / 56.36083°N 94.61306°W |
| To | Dorsey Converter Station at Rosser located 26 kilometres (16 mi) north west of Winnipeg at 49°59′39″N 97°25′38″W / 49.99417°N 97.42722°W) |
| Owner | Manitoba Hydro |
| Operator | Manitoba Hydro |
| Manufacturer of substations | English Electric (original); Alstom, Siemens (replacement) |
| Construction started | 1966 |
| Commissioned | June 17, 1972 |
| Type | overhead transmission line |
| Type of current | HVDC |
| Total length | 895 km (556 mi) |
| Power rating | 1,620 megawatts 1,800 Amperes |
| AC Voltage | 4,160 V in urban Winnipeg |
| DC Voltage | ±450 kilovolts |
| No. of poles | 2 |
| No. of circuits | 1 |
| From | Henday Converter Station near Sundance Bipole 2 at 56°30′15″N 94°08′26″W / 56.50417°N 94.14056°W |
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| To | Dorsey Converter Station at Rosser Bipoles 1 and 2 at 49°59′39″N 97°25′49″W / 49.99417°N 97.43028°W |
| Owner | Manitoba Hydro |
| Operator | Manitoba Hydro |
| Manufacturer of substations | Siemens, AEG, Brown Boveri |
| Commissioned | 1985 |
| Type | overhead transmission line |
| Type of current | HVDC |
| Total length | 937 km (582 mi) |
| Power rating | 1,800 megawatts |
| DC Voltage | ±500 kV |
| No. of poles | 2 |
| No. of circuits | 1 |
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 / 56.36139°N 94.61333°W and Henday Converter Station near Sundance at 56°30′14″N 94°08′24″W / 56.50389°N 94.14000°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 / 49.99278°N 97.42833°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.
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