Greater Ottawa Region Local Advisory Committee Meeting #3 – Item # 3 January 12, 2016
Outline of this Presentation Part 1: Supplying Demand Growth in South Nepean Part 2: How South Nepean Fits in as Part of the Broader West Ottawa Area and it’s Supply Needs Part 3: Recommend an Integrated Plan to Address the Needs in South Nepean and the Broader West Ottawa Area 2
Part 1: Supplying Demand Growth in South Nepean 3
Need to Supply Growth in South Nepean • The area is supplied from three stations: – Longfield DS from the north (off Nepean TS) – 2 feeders off Limebank MTS from across the Rideau River – Fallowfield DS from the west • The growth in South Nepean is due to a number of developments in this area: – Nepean town center – Strandherd Business Park – Development of Barrhaven south community – Expansion of Barrhaven and 230 kV 115 kV Longfield community 4
Need to Supply Growth in South Nepean (2) • Total station capacity for the area based on planning criteria is 57 MW • Today the peak demand in the area already exceeds the station level planning capability – Hydro Ottawa is managing the supply to the area through distribution transfer capability – The need for additional supply capacity is forecasted to grow to 60 MW by 2032 • The 115 kV circuit supplying Total Need: > 60 MW Fallowfield will also reach its supply capacity by 2022 5
Approaches to Address Need in South Nepean Two Possible Approaches to Address Need Option 1: Reduce demand Option 2: Increase transmission on the distribution system supply capacity by building a new transformer station Could be achieved by: Variations: • Distribution-connected Generation • New supply station at 230 kV • Demand Response • New supply station at 115 kV • For comparison: – 10 MW peak demand = 2,500 rooftop solar installations of 10 kW each – 10 MW peak demand = ~12 grocery stores (Superstore) or ~ 3,000 homes • The magnitude (~ 30 MW near-term and ~60 MW longer-term) and timing (as soon as possible) make it infeasible to reduce demand growth on the distribution system 6
Recommended Plan to Supply Demand Growth in South Nepean • A new supply station and connection line in South Nepean is recommended to support the growth in the area • Due to the capacity limit on the existing 115 kV circuit supplying Fallowfield, Richmond and Manotick, a 230 kV connection is recommended for the new station 7
Part 2: South Nepean as Part of the Broader West Ottawa Area 8
Additional Overlapping Need to Supply the Broader West Ottawa Area • West Ottawa is defined as the 20 stations Downtown supplied by the 115 kV system originating from Merivale TS – South Nepean is part of the West Ottawa area West Ottawa • The need for additional 230/115 kV transformer capacity at Merivale TS, the main supply point South Nepean for West Ottawa, was identified in the April 2015 IRRP – Due to growth across the broader region 230 kV 115 kV 9
Need for Additional 230/115 kV Transformer Capacity at Merivale TS • Based on the planning forecast the two 230/115 kV transformers at Merivale TS 2019, Merivale transformers will reach their capacity reach their capacity around 2019 • Because South Nepean is part of the West Ottawa area, the recommended solution for South Nepean, a new 230 kV station and connection line, will help address this broader need in West Ottawa Total Need: 150 MW 10
The Recommended Solution for South Nepean Helps Address the Capacity Need at Merivale • The recommended new 230 kV station and connection line will supply ~ 50 MW of demand in South Nepean, reducing the demand on the West Ottawa 115 kV system and therefore reduces the need for new Remaining need for Stage 2: 100 MW capacity at Merivale • However there is still a large Stage 1: new 230 kV station capacity need remaining at South Nepean Merivale TS – As much as 100 MW by 2032 11
Approaches to Address Remaining Supply Capacity Need at Merivale TS Two Possible Approaches to Address Need Option 1: Reduce demand on the Option 2: Add a third transformer at West Ottawa 115 kV system Merivale TS Could be achieved by: Potential constraints: • transmission or distribution connected • cost and complexity due to limited space at conservation and/or generation the station • other technologies • would increase the 115 kV system short • moving demand from 115 kV to 230 kV circuit current level • If a portion of West Ottawa demand is supplied from a new 230 kV station in South Nepean, and therefore removed from the 115 kV system forecast (consistent with Option 1) then there is more time available to address the remaining longer term need, avoiding Option 2 12
Reducing Demand on the West Ottawa 115 kV System • A bundle of different non-wires and wires components may be used to reduce demand across the West Ottawa area • Bundling different types of components has several advantages: – will address the need incrementally and therefore allow flexibility – can be implemented in stages, making longer-lead-time components feasible – enables opportunity to collect community input on options and objectives • Examples of possible components are: – Local Demand Response Program – Local generation (transmission or distribution connected renewables, or small scale CHP) – Local storage, or other new technologies – Additional load transfer from 115 kV system to 230 kV system 13
Part 3: Integrated Planning Recommendations 14
Overview of the Recommended Plan • A staged plan is recommended to address the two needs identified in the West Ottawa area: Stage 1: A new 230 kV station and connection line to supply growth in the South Nepean area Stage 2: An integrated plan, to be informed by community input, which will avoid the need for additional 230/115 kV transformer capacity at Merivale TS by reducing demand across the West Ottawa area 15
Recommendations – Stage 1 • A new 230 kV transformer station and connection line are recommended to increase supply to South Nepean – Development, approvals and construction will take approximately 5 years • Hydro One and Hydro Ottawa should initiate the development work and proceed to the required approval processes including Environmental Assessment, and Leave to Construct – Broader public engagement on this project will take place as part of the Environmental Assessment process • No plan level engagement is planned for Stage 1, due to the lack of feasible alternatives 16
Recommendations – Developing Stage 2 of the Plan • Public engagement will inform Stage 2 of the Plan – Input will be sought on potential options, and the community’s priority objectives • The Regional Planning Working Group will continue to monitor the planning forecast for West Ottawa – The need for demand reduction will be reassessed periodically • A plan for Stage 2 it targeted for completion by mid 2017 – Including options for long-tem flexibility – Cost allocation issues must be addressed 17
Summary of Public Engagement Recommendations • A meeting with City of Ottawa staff is being planned for February, prior to finalizing and posting the Integrated Plan • The IESO will host a public webinar on the Integrated Plan in the spring of 2016 • For Stage 1, project level public engagement will be carried out as part of the Environmental Assessment process (Hydro Ottawa and/or Hydro One) • For Stage 2, plan level public engagement will be carried out in 2016 as part of the planning process (Regional Planning Working Group) 18
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