Generic hearing to consider various issues related to Uniform Transmission Rates

EB-2021-0243, EB-2022-0325

The Ontario Energy Board is commencing a hearing on its own motion to consider various issues related to Ontario’s Uniform Transmission Rates (UTRs). These issues have been identified in the years since Ontario’s UTR framework was established in Hydro One’s first rate application proceeding in 2000, and implemented in 2002 following the opening of Ontario’s electricity market.

The OEB has identified a set of UTR-related issues to be addressed in the generic hearing. These issues may be revised, and additional issues may be raised, based on input from transmitters, customers and other stakeholders. The issues identified by the OEB are summarized below:

  1. Timing of UTR decisions
    Overview of issue: Transmitter revenue requirements are recovered through UTRs which are charged to all wholesale market participants, including electricity distributors. The timing of transmitter revenue requirement proceedings does not always allow for the annual UTR decision to be finalized in December for January 1. This can lead to forgone revenue, which must then be calculated and included when UTRs are updated. In addition, new transmitters are being added to UTRs when their assets come into service, and this does not always align with a January 1 UTR update.
  2. Number of decimal places for UTRs
    Overview of issue: UTRs paid by transmission customers are calculated to two decimal places (unlike distribution rates, which are calculated to four decimal places).
  3. Prorating transmission charges for new connections to account for when the connection took place in the month
    Overview of issue: Transmission customers are charged a monthly rate ($ per kW) for line connection billing demand and a monthly rate ($ per kW) for transformation connection billing demand. Line connection and transformation connection charges for newly connected transmission customers in their first month of connection are not revised upward or downward in proportion to when in the month the new connection was made.
  4. Charges caused by planned transmission outages
    Overview of issue: In a month when a planned transmission outage occurs, a transmission customer that transfers its load to another of its delivery points is charged more than it would be if the outage did not occur. This is because transmission charges are based on the monthly peak at each delivery point.
  5. Calculation of network charge determinant
    Overview of issue: A transmission customer’s network pool charge determinant is based on the higher of its coincident peak demand and 85% of its non-coincident peak demand. The 85% value was established over 20 years ago and may warrant a review.
  6. Basis for billing energy storage facilities
    Overview of issue: The UTR is not explicit on whether energy storage facilities should continue to be treated as non-renewable generating units with a threshold for gross load billing of 1 MW for the transformation and connection rate pools paid for by transmission customers. Clarification is currently provided to transmission customers through OEB guidance on a case-by-case basis.
  7. Gross load billing thresholds for renewable and non-renewable generation
    Overview of issue: There has been some uncertainty around the application of gross load billing exemptions by transmission customers for renewable and non-renewable generation. Clarification is currently provided to transmission customers through OEB guidance.
  8. Setting the export transmission service (ETS) rate
    Overview of issue: The ETS rate is paid by transmission customers and applies to all electricity exports and wheel-throughs. The ETS rate has historically been set as part of Hydro One’s transmission rate application. Hydro One recently filed evidence on the ETS rate in its application for electricity transmission and distribution rates and other charges for the period from January 1, 2023 to December 31, 2027 (2023-2027 Joint Rate Application, OEB file number EB-2021-0110). In response to prior OEB direction, Hydro One’s ETS evidence includes a cost allocation study, an updated jurisdictional review, and a commentary on market implications of the ETS prepared by the IESO.

    The OEB has decided to address the ETS rate in the generic UTR hearing, instead of in Hydro One’s 2023-2027 Joint Rate Application proceeding. Addressing the ETS in the generic UTR hearing will lend focus to the issue and facilitate participation by transmitters and other stakeholders without requiring them to intervene in the much broader 2023-2027 Joint Rate Application proceeding. The ETS evidence that Hydro One has already filed, as well as clarifications the OEB has requested from the IESO and Hydro One, will be considered in the generic UTR proceeding instead of in the 2023-2027 Joint Rate Application proceeding.

    The first phase of the generic UTR hearing will focus on the ETS issue and setting the ETS rate. Other UTR-related issues will be considered at a later date, in a subsequent phase or phases of the generic UTR hearing.


More information


Details and Updates

The OEB has issued a Decision and Order on a Generic Hearing on Uniform Transmission Rates-Related Issues and the Export Transmission Service Rate.

Submit a letter of comment

You can submit a letter of comment that will be considered by the panel deciding the application. Unless the notice states otherwise, your letter of comment will be accepted until the record of the proceeding is closed (which usually occurs with the filing of the applicant’s final reply argument). However, you are encouraged to submit your letter as early in the process as you can. Depending on timing of receipt of letters of comment, the applicant will typically provide a respond to the issues raised in those letters. Your letter will be provided directly to the panel of Commissioners who will be deciding whether the application is approved. The panel will consider your comments in reaching their decision. The panel will only be able to consider comments which relate to issues which are within the authority of the OEB and relevant to the issues being considered by the panel.

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Or mail the below address with the reference number EB-2021-0243, EB-2022-0325

Ontario Energy Board
P.O. Box 2319
2300 Yonge Street, 27th Floor
Toronto ON M4P 1E4
Attn: Registrar