Oakville, Ontario: The consortium of Siemens and Mortenson announced completion August 28 of the ±500-kilovolt Bipole III high-voltage direct-current (HVDC) power converter stations for Manitoba Hydro. The HVDC converter stations are an integral part of the Manitoba Hydro Bipole III transmission project. The entire transmission line will act as an "electricity highway", bolstering the reliability of Manitoba's electricity supply by reducing dependence on existing HVDC transmission lines and converter stations, while also ensuring low-loss transport of renewable hydropower from northern generating stations to meet growing energy requirements.
HVDC converter stations are specialized substations that support the conversion of electric power from high voltage alternating current (AC) to high-voltage direct current (HVDC), or vice versa, a critical component to interconnecting separate power systems.
The Bipole III converter stations include the Keewatinohk Converter Station in northern Manitoba near Hudson Bay, and the Riel Converter Station near Winnipeg in the southern region of the province. The converter stations have a transmission capacity of 2,000 megawatts – enough to meet over 40 percent of the province's peak electricity demand. HVDC transmission is the ideal technology to implement when electricity must be transported over vast distances from remote areas where it is produced to urban and industrial centers where it is needed, as HVDC transmission suffers much lower electricity losses than standard AC transmission.