The Nelson River DC Transmission System is an electric power transmission system of two high voltage, direct current lines in Manitoba, 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.
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 / 56.36139; -94.61333 (Radisson Converter Station) and Henday Converter Station near Sundance at 56°30′14″N 94°08′24″W / 56.50389°N 94.14°W / 56.50389; -94.14 (Henday Converter Station), 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 / 49.99278; -97.42833 (Dorsey Converter Station)), 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.
There are no intermediate switching stations or taps. Both bipolar systems have extensive ground return electrodes to allow use in monopolar mode.
Read more about Nelson River DC Transmission System: History, System Components
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