The integration of new valves and controls to Nelson River HVDC Bipole 1

The Nelson River HVDC transmission system in Manitoba presently consists of two bipoles. Bipole 1 has a rating of 1670 MW at ±463 kV and transmits this power from the northern terminal at Radisson Station over a distance of approximately 900 km to the Dorsey terminal near Winnipeg. Bipole 2 has a rating of 1800/2000 MW at ±500 kV and transmits this power from the Henday Station, some 40 km downstream from Radisson, also to the Dorsey terminal. Bipole 1 which is the subject of this article, was the last of the HVDC links to be commissioned using mercury arc power convertor valves. The rating of 154.5 kV, 1800 Å per group is the highest used for mercury arc convertor valves