GTA East Local Advisory Committee Meeting #2 May 4, 2016
Presentation Outline • Review of items from the last meeting – Capacity Needs in GTA East • Status of Restoration Analysis • Pickering-Ajax-Whitby IRRP - What you can expect in the near-term portion of the Plan • Discussion of Priorities for the Mid and Long Term 2
Review of Needs in GTA East • The Region is broken down into two sub-regions: – Oshawa-Clarington – Pickering-Ajax-Whitby • Oshawa-Clarington: – A new transformer station is recommended for the area to address near-term capacity needs • Pickering-Ajax-Whitby: – Additional transformer capacity required to be in-service by 2018 to support urban and greenfield growth in Pickering – Rationale for meeting restoration criteria for rare failure events to be investigated 3
Review - Needs in GTA East Approximate site of new transformer station 4
230 kV Circuits from Cherrywood Transformer Station (H24/26C & M29/B23C) 5
Single Line Diagram of the Study Area To Lennox TS 500kV 500kV Bowmanville SS 750MVA 500kV/230kV 750MVA 500kV/230kV Cherrywood TS Clarington TS Autotransformers Autotransformers 230kV 230kV To Otonabee TS C28C To Otonabee TS H24C To Pickering SS (8 circuits) To Havelock TS H26C To Almonte TS M29C To BellevilleTS B23C Wilson TS Whitby TS Thornton TS Oshawa GM CTS Atlantic Packaging CTS Whitby CGS Gerdau CTS 6
Restoration - What does it mean? • How much load can be “restored” in a certain amount of time after an outage . 7
Restoration Status • LDCs generally have some amount of load transfer capability available. This capability can include: – Moving load to adjacent stations – Loading up feeders to their maximum ratings – Other actions • Direct connect customers account for 153 MW of load along the H24C/H26C load pocket that cannot be restored via LDCs • After taking into consideration the load transfer capability of LDCs in the area, two of the restoration timelines are currently not met: 30 minute and 4 hour timelines and consideration should be given to solutions 8
Overview of Restoration Options 1. Do Nothing – The value of lost load is less than the cost of a system upgrade 2. Increase Distribution Transfer Capability – Provide additional load transfer capability between stations at the feeder level 3. Installation of Motorized Disconnect Switches – Segregate line sections to reduce the overall effect and probability of an outage 4. A combination of 2 & 3 9
Options considerations • Considerations when comparing the costs of options: • The probability of an outage occurring • The location of an outage on the various segments • Risk introduced by the switches / solution • Other LDC operational value provided by low voltage transfers • Cost to customers of a long interruption – Risk calculations indicate there is value in conducting detailed analysis of solutions 10
Next Steps for the Restoration Analysis • There could be benefit in distribution or transmission level infrastructure solutions • A comparison between these four options requires detailed study between the transmission and distribution companies • Refinement of the restoration analysis and related solution recommendations to be determined as part of the Regional Infrastructure Plan lead by Hydro One 11
Timeline and the near-term portion of the IRRP • IRRP for the Pickering-Ajax-Whitby area is to be completed by end of June 2016 according to regulatory timelines – A near-term need for transformation capacity has been identified and a new station is recommended – Refinement of the restoration analysis and related solution recommendations will be determined in the Regional Infrastructure Plan for the Region to be led by Hydro One and expected to be complete in Q1 2017 12
MID- AND LONG- TERM PRIORITIES 13
LAC Member Discussion LAC members are asked to provide feedback on the following questions to help shape the mid- and long-term priorities of the plan: 1. Where are the key future growth areas in your communities, along with the scope of the growth and timing, both residential and non-residential? 2. What are your energy goals and objectives and is there a plan to achieve them? For the communities, does your community have a community energy plan or other plan to address greenhouse gas emissions, climate change and extreme weather events? 3. Can you share information on your policies and initiatives that will impact energy use (i.e. electrification of transit etc.)? 14
QUESTIONS 15
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