Manitoba Hydro Completes $42M Bipole III Converter Upgrades

WINNIPEG, MB — Manitoba Hydro announced the successful commissioning of a $42-million control and protection system modernization on Saturday, completing comprehensive digital upgrades across the Bipole III High-Voltage Direct Current (HVDC) transmission corridor.

HVDC Control Architecture and Grid Reliability

The project upgraded the specialized digital valve control units, optical thyristor firing circuits, and high-speed telemetry links at the Keewatinohk Converter Station in northern Manitoba and the Riel Converter Station east of Winnipeg. The 1,384-kilometre Bipole III line transmits up to 2,000 megawatts of clean hydroelectric energy from generating stations on the Nelson River to southern population centres.

The modern control architecture eliminates single-point-of-failure vulnerabilities and provides sub-millisecond fault isolation, protecting the provincial power grid against severe geomagnetic disturbances and lightning-induced voltage surges.

Interprovincial Export Reliability

In addition to supplying southern Manitoba, Bipole III provides baseload stability for cross-border clean electricity export contracts with utilities in Minnesota, Wisconsin, and Saskatchewan. Manitoba Hydro leadership noted that maintaining high reliability on northern HVDC lines is essential to maximize export revenues that help keep domestic customer electricity rates among the lowest in North America.

Engineers executed the control switchover during a scheduled low-flow maintenance window without interrupting power delivery to residential or commercial ratepayers.

Ongoing System Maintenance

Manitoba Hydro will proceed with routine transmission line insulator washing and aerial drone inspections along the Bipole corridor throughout September.