A hand-off letter that resulted from the Integrated Regional Resource Plan (IRRP) regarding the near-term wires solutions was provided to Hydro One Networks Incorporated (HONI) by the Independent Electricity System Operator (IESO) on 7 December 2015. The recommendations of the hand-off letter are:

  • to rebuild Barrie TS and the E3/4B transmission line and to upgrade the voltage of these facilities from 115 kV to 230 kV;
  • to upgrade the transformers at Barrie TS from 55/92 MVA units to 75/125 MVA units; and
  • to retire the two 230/115 kV auto transformers at Essa TS (T1 and T2).

The Working Group for the Barrie/Innisfil sub-region is continuing to work on the development medium and long-term plans for the sub-region. These include:

  • constructing a new TS (InnPower TS);
  • constructing a new 230kV transmission line from Barrie TS to the InnPower TS site;
  • implementing a Distribution Network egressing from InnPower TS; and
  • Proposing a 44 kV solution for the load growth in South Barrie.

The Working Group has identified South Barrie as a key load growth point. This area is serviced by both InnPower and Alectra. In the near term, a single 44kV feeder has been committed from the Barrie TS. The near-term solution would address the infrastructure requirements within the current Distribution System Plan (DSP) period; however, as the medium and long term plans consider the construction of new TS, Distribution Network, and transmission lines within InnPower’s service territory the outcome of these plans would potentially play a major role in the DSP submitted by InnPower in the future.

From 2019 to 2021, a 44 kV pole line rebuild and replacement project has been planned on 5th Side Road between 5th Line and IBR. This project will replace the old small conductor infrastructure and have an additional 44 kV circuit on to accommodate the new Alliston 9M6 feeder scheduled to reach InnPower within the next ten (10) years for load growth.

By 2020 HONI plans to deploy a new additional 44 kV feeder from Barrie TS to InnPower’s service territory to support new growth in south Barrie. For that reason InnPower will be utilizing two 44 kV out of Barrie TS by 2020.

For a copy of InnPower's master plan, please follow InnPower Master Plan

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