LONG-TERM DEVELOPMENT PLAN—2016 for Manitoba Hydro's Electrical Transmission System ManitobaManitoba Hydro’s Hydro’s Existing Existing Generating Generating Stations Stations andand Transmission Transmission System System ii LONG-TERM DEVELOPMENT PLAN—2016 for Manitoba Hydro's Electrical Transmission System 2 LONG-TERM DEVELOPMENT PLAN—2016 for Manitoba Hydro's Electrical Transmission System Executive Summary Manitoba Hydro’s electrical transmission system, consists of a network of alternating current (ac) transmission lines and terminal stations plus high voltage direct current (HVDC) transmission lines and converter stations that collectively deliver the power from Manitoba Hydro’s generating stations to customers across the province and beyond provincial boundaries. This report describes the current long term development Plan for Manitoba Hydro’s electrical transmission system covering the period from 2016 to 2035. The Plan describes the proposed additions, enhancements, replacements, and refurbishments that are needed to ensure the transmission system continues to meet Manitoba Hydro’s mandate of serving the province with a reliable supply of electricity as well as meeting the regulated performance requirements of Manitoba Hydro and its interconnected utilities in Canada and the United States. A basic performance requirement is that the transmission system be able to continue to serve firm load during an outage of a system element such as a transmission line, transformer, circuit breaker, or other auxiliary device (also known as N-1 contingency planning). The transmission system must also be designed and operated such that an outage to one part of the network will not cascade or cause stress to other parts of the transmission system or interconnected utilities outside the province. Achieving these goals requires the timely implementation of additions, enhancements and replacements in order to avoid load shed, rotating blackouts or loss of export capacity. The bulk of Manitoba’s power is transmitted from remote generating stations in the north to customers in southern Manitoba over the Nelson River HVDC transmission system. The HVDC system is a critical component for meeting the electricity needs of the province. The two Nelson River HVDC transmission lines are located in the same corridor, and both HVDC southern converters are located at Dorsey which makes the current HVDC system vulnerable to a common outage. This plan includes overview of Bipole III project which increases the robustness of the HVDC system by providing an alternate transmission corridor and terminus. This Plan describes projects that span two main investment types and eight drivers of need for transmission capital investments. The two investment types are growth and sustainment, while the eight drivers are safety, load growth, reliability, transmission service, new generation, new customer connections, efficiency and aging infrastructure. The Plan also identifies which region of the province is being addressed by each capital investment. The map on the following page provides a visual for the more significant growth and sustainment projects to be implemented during the first ten years (fiscal years 2016/17 to 2025/26) of the current Capital Expenditure Forecast CEF16. A summary table follows, listing the approved and proposed capital investments covered by the Plan, grouped by region and investment type, with a mapping to the drivers that apply to each. A total of $6.15 billion of transmission-related project expenditures has been identified in the 20-year CEF16. The large majority of these expenditures are associated with growth, at $4.65 billion or 76%, while $1.50 billion or 24% are investments for sustainment. The long-term development plan is reviewed and adjusted annually to reflect revised load forecasts, updated system performance and asset condition assessments, and new requests for transmission service, bulk load connections and generation connections. Not all of the projects identified in this Plan will necessarily be built; while some are approved and either underway or ready for execution, others represent proposed investments that are in the early planning stage and hence are subject to change. The new station sites and transmission lines associated with the projects described in this Plan are shown for illustrative purposes only. Manitoba Hydro follows a Site Selection and Environmental Assessment Process, which includes public consultation on the preferred location of new stations and routing of new transmission lines, and obtaining the regulatory licenses necessary for construction of facilities. LONG-TERM DEVELOPMENT PLAN—2016 for Manitoba Hydro's Electrical Transmission System iii Transmission Business Unit - Heat Map for Major + Base Capital Under CEF16 (Fiscal years 2017-2026) iv LONG-TERM DEVELOPMENT PLAN—2016 for Manitoba Hydro's Electrical Transmission System Major Transmission System Projects and Drivers Drivers of Need Drivers Improve Safety Improve Growth Load Serve Local Reliability or Improve Maintain Service Transmission Provide Connect New Generation Connections Customer Efficiency Increase Aging Infrastructure Address ISD INTERCONNECTION PROJECTS Manitoba-Minnesota Transmission Project 2020 05 Manitoba-Saskatchewan Transmission Interface Project 2021 06 Keeyask Generation Outlet Transmission Facilities 2021 08 INTER-REGIONAL Sustainment Bipole II Thyristor Valve Replacement 2027 03(**) Bipole I & II Major Refurbishment (*) 2036 03 HVDC Transformer Sustainment Program 2037 03(**) Dorsey Synchronous Condenser Refurbishment (extended) 2031 03 (**) Bipole I & II DC Disconnects 2029 03 HVDC Transformer Sustainment (extended) 2030 03 (**) Transmission Line Upgrades for Improved Clearance (NERC) 2023 03 (**) Dorsey Synchronous Condenser Refurbishment 2026 03(**) Transmission Transformers Sustainment Capital Program 2032 09 (**) Transmission Line Footing Sustainment Program 2030 03 (**) HVDC Smoothing Reactor Replacements 2023 10 (**) Station Battery Bank Replacement Program 2022 03 Transmission Line Protection & Teleprotection Replacement 2018 05 (**) Bipole I & II Space Dampers Project (Phase 2) 2017 12 (**) Transmission Line Wood Pole Sustainment Capital Program 2026 03 (**) Mobile Radio System Modernization 2017 06 Bipole I & II Communications Upgrade 2024 03 115 kV Protection Upgrades 2023 03 (**) Telecommunications 48VDC Upgrades 2036 (**) HVDC BP2 Valve Hall Wall Bushing Replace 2024 10 (**) PCB Bushing Elimination Program 2024 03 (**) HVDC Gapped Arrester Replacement 2021 11 (**) Transmission Breaker Sustainment Capital Program 2033 03 (**) HVDC Circuit Breaker Opp. Mechanical Replacement 2019 03 (**) 13.2 kV Shunt Reactor Replacement Program 2018 11 (**) HVDC BP2 Refrigerant Condenser Replacement 2025 11 (**) LONG-TERM DEVELOPMENT PLAN—2016 for Manitoba Hydro's Electrical Transmission System v Drivers of Need Drivers Improve Safety Improve Growth Load Serve Local Reliability or Improve Maintain Service Transmission Provide Connect New Generation Connections Customer Efficiency Increase Aging Infrastructure Address ISD HVDC BP1 DCCT Transductor Replacement 2028 10 (**) HVDC System Transformer & Reactor Fire Protection 2017 06 Bipole I & II DC Filter Protection 2025 03 Growth Bipole III Reliability Project 2018 07 Southern AC System Breaker Replacements 2017 06 (**) Winnipeg Area Capacitor Bank Additions (Phase 1) 2019 11 Winnipeg Area Capacitor Bank Additions (Phase 2) 2026 10 REGIONAL Northern Region Sustainment Diesel Generating Station Upgrades 2020 03 Mile 13 Station Salvage 2028 03 Western Region Sustainment Brandon Area Transmission Improvements 2016 07 Growth Southwestern Manitoba Capacity Enhancement 2030 10 Winnipeg to Brandon System Improvements 2025 04 Brandon-Victoria 115-66 kV Capacity Addition 2022 10 Souris East Transformer Capacity Enhancement 2019 10 Dauphin/Vermillion 230 kV Station Capacity Increase 2022 10 Interlake Region Growth Ashern Bank Addition 2023 09 Rosser Station 115-66 kV Transformer Addition 2019 10 Eastern Region Sustainment Pointe du Bois Transmission Refurbishment/Redevelopment (Phase 1) 2016 12 Growth Steinbach Area 230-66 kV Capacity Enhancement 2020 10 (**) Lake Winnipeg East System Improvements 2017 09 Letellier - St. Vital 230 kV Transmission Line 2020 07 Pointe du Bois Transmission Refurbishment/Redevelopment (Phase 2) 2024 04 vi LONG-TERM DEVELOPMENT PLAN—2016 for Manitoba Hydro's Electrical Transmission System Drivers of Need Drivers Improve Safety Improve Growth Load Serve Local Reliability or Improve Maintain Service Transmission Provide Connect New Generation Connections Customer Efficiency Increase Aging Infrastructure Address ISD Whiteshell Area 115-33/66 kV Station 2028 10 Stanley Station 230-66 kV Transformer Additions 2018 10 Portage Area 230-66 kV Capacity Upgrade 2029 10 Winnipeg Region Growth Rockwood East 230-115 kV Station & Line Sectionalization 2016 02 (**) SW Winnipeg 115 kV Transmission System Improvements 2021 10 (**) La Verendrye to St. Vital 230 kV Transmission Line and Breakers 2020 10 (**) Northeast Winnipeg Capacity Enhancement 2031 10 La Verendrye Station 230-66 kV Bank Addition 2023 10 (*) Projects indicated in red are currently in the Early Planning Stage and subject to change. (**) Multiple years Table does not include projects under $10 million. LONG-TERM DEVELOPMENT PLAN—2016 for Manitoba Hydro's Electrical Transmission System vii Contents Manitoba Hydro’s Existing Generating Stations and Transmission System ..................................