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Nelson River Bipoles 1 and 2


Manitoba Hydro


Manitoba, Canada
     
 
 
Manitoba Hydro is the sole electricity provider in Manitoba, with approximately
95% of its power generated from hydro sources. In the mid-1960’s the development of high voltage direct current (HVDC) technology was a key factor in plans for the development of generating stations on the Nelson River in the north of the province, almost 900 km from the southern load centres.

Teshmont investigated ac versus dc transmission for the Nelson River project.
HVDC was selected as the most economic alternative and Teshmont provided full
services for the project. The system consists of Bipole 1 (±450 kV, 1800 MW) and
Bipole 2 (±500 kV, 2000 MW). 		 
 
   

Teshmont has provided engineering services relating to the Nelson River Project
including power system studies, design work, and commissioning assistance. The
services provided to date since the inception of the original projects include:

  • Feasibility and system definition studies

  • Detailed engineering design

  • HVDC transmission line engineering services, including
    • Route studies and geotechnical investigations

    • Testing of prototype foundations

    • Line optimization studies

    • Electrical and structural engineering design

    • Specifications for materials and installation

    • Procurement, inspection and expediting

    • Construction supervision and project management

  • Electrical, mechanical, civil and structural design of DC converter stations

  • Preparation of detailed design specifications for converter stations
    and associated equipment

  • Studies to locate ground electrodes

  • Tender evaluation and contract negotiation

  • Construction supervision and project management

  • Feasibility and planning studies for the siting of the Bipole 3 transmission line, and preliminary studies and engineering for converter stations.

  • Specifications for procurement and installation of additional synchronous condensers to increase the ac system strength

  • Studies to review the technical and operational aspects of a multiterminal dc interconnection between Manitoba and Ontario.

  • Design work to interface the existing facilities with the thyristor valves that replaced Bipole 1 mercury arc valves

  • Specification and design of replacement ac filter reactors and resistors, and dc filter reactors.

  • Specification and inspection relating to replacement converter
    transformers.

  • Specification, design work, and inspection for spare smoothing reactors.

  • Commissioning including writing of procedures