- With whom should metering installations used for settlement purposes be registered?
Metering installations used for settlement in the
IESO-administered markets must be registered with the IESO. Details regarding the process of registering
a metering installation can be found in parts 3.2, 3.3, 3.4, 3.5, 3.7 and 3.8
of Market Manual 3: Metering.
- What are the registration requirements for a Metering Service Provider (MSP)?
The Market Rules require that the registration and
maintenance of the metering installations used in the IESO-administered markets
be handled by IESO-registered Metering Service Providers. To apply for
registration, applicants must follow part 3.1 of the Market Manual 3: Metering,
Metering Service Provider Registration, Revocation and De-registration
and complete the MSP Application Form
and the Transitional Metering Service Provider Agreement.
- Who owns metering data?
Metering data is always owned by the Metered Market
Participant assigned to the relevant meter.
- Who is responsible for the cost of installing and maintaining the metering installation?
The Metered Market Participant is responsible for the cost of installing and maintaining
the metering installation. However, the Metered Market Participant must
contract the services of a Metering Service Provider to perform these tasks.
- What measures have been taken to ensure consistency and standards in meter requirements at the wholesale and retail levels?
Retail Metering standards lie within the jurisdiction of the OEB. When the Market Rules were
developed by the Ontario Market Design Committee (MDC), wholesale and retail
metering teams held joint sessions to ensure the two sets of metering standards
were as consistent as possible.
Wholesale Metering Standards
enable prospective wholesale market participants to assess the equipment and design
requirements of joining the wholesale energy market and determining whether
upgrades of existing installations are required.
- Is there a catalogue of the manufacturers and meters accepted by the IESO?
The Conforming Meter List
maintained by the IESO provides a catalogue of the manufacturers and
meters accepted by the IESO.
- Is there a list of registered Metering Service Providers available?
A list of registered Metering Service Providers
that have satisfied the requirements specified in the Market Rules and the MSP
Registration procedure is available on the IESO website. The IESO will also publish and maintain a list of
MSPs whose registration has been revoked.
- If a physical facility has multiple meters, can it have multiple delivery points associated with it?
Delivery Points for settlement in the Wholesale Energy Market are assigned on a Metered
Market Participant (account) basis. Thus, multiple Delivery Points may be
created for the same physical facility. In addition, separate Delivery Points
are created for Transmission Customers (Network and Connection, respectively).
- If the facility has internal sub-metering which shows hourly profiles and can be totalized for overall consumption, is
this adequate for metering purposes or back-up metering purposes?
All new wholesale meters must be on the list of conforming meters. For meters that were in service
at time of market open, please call the IESO.
- Are potential participants in the Wholesale Energy Market required to have a Metering Service Provider register their
metering installation with the IESO or can this be done by the local utility?
The Metered Market Participant contracts the services of a IESO-registered
Metering Service Provider which will undertake the registration of the metering installation(s) and totalization table required for settlement at the relevant
Delivery Point. The registration of a metering installation with the IESO can be
undertaken by the local utility provided this organization is duly registered
as a Metering Service Provider.
- How does a third party access metering data and what authority is required?
An authorized agent can be
associated to the meter point/delivery point by the market participant
designated as the Metered Market Participant, provided the agent has also
been registered as a market participant. The association of an authorized agent
to a specific Delivery Point is accomplished via MV-WEB. Once associated with a certain Delivery
Point, the authorized agent can access metering data associated with that
Delivery Point at all levels (Delivery Point, summary map and/or physical meter
- What time will meter data typically be available for a trade date?
The collection of metering
data for a specific trade date begins at the end of the trading day (at
midnight) and is expected to conclude by 6:00 am. The automatic validation and estimation processes begins once the
collection of metering data has been completed. The manual editing of metering
data may also be be undertaken once the collection of metering data has been
- Will MV-Web accept requests from market participants to download meter data that is not of 5 min intervals
(eg, 15 min or hourly?)
Metering data will be available to participants at
the same interval at which it is metered. A Delivery Point or summary map reading representing a totalization of
the contributing meters that are of different interval measurements (15-minute
and 5-minute) will be displayed at the smallest interval of the contributing
meters. Thus, if the smallest interval
of any one of the contributing meters is 5-minutes, the metering data will be
presented at 5-minute intervals. Conversely, if all contributing meters are 15-minute meters, the
metering data will be presented at 15-minute intervals. Note that MV-Web
does not provide hourly readings.
- Can there be more than one version of the Totalization Table in effect during the same – ie, can it change
during the day or are the changes always made effective at the end of the day?
A totalization table is in effect for a complete
trade day for both the energy market and for transmission tariffs. A
totalization table that is re-submitted for an existing Delivery Point is considered
to be a new totalization table replacing the existing one. When a new
totalization table is submitted for an existing Delivery Point, the new table
takes effect at midnight, ie, at the same time the old one ends.
- How long will all the versions of the interval meter data be kept available for market participants to download?
Metering data will be available for up to 13 months after a trade date.
- What is the format and content of the request (input) and response (output) file for metering data?
The request (input) file is an ASCII file containing
general information (password, report type and request reference number) as
well as specific information (ID of the queried system: Meter Point, Delivery
Point, summary map).
The response (output) file is generated, upon the
viewer's option, in either ASCII or EDI-867 format, while metering data is
displayed for various channels in kWh, kVAh, I2h or V2h.
The format of the EDI-867 response file is available on the
Technical Interfaces page - under Revenue Metering - Report Templates & Samples - "Meter Reading Data - download"
- Will the IESO's meter data validation include checking the main meter data reading against the alternate meter
data reading (where available) and reporting on any discrepancies?
If so, will market participants have access to the discrepancy report?
Yes, the Validating,
Estimating, and Editing (VEE) process does include comparing metering data
collected from the main and the alternate meter. When the difference exceeds
the predefined limits, the MSP will be informed by means of a trouble call.
- Will meter data aggregated to the Delivery Points (point of transaction with the IESO) be available
(ie, independent of settlement statements) for market participants
to download, and if so, how?
Meter data available from the Revenue Metering System can be requested on a daily basis by
the authorized participants at the Delivery Point, summary map and/or Meter
Point (physical meter) level. Meter data requests may be made via MV-WEB or
- Will market participants be able to view and download any versions of their interval meter data?
A market participant authorized or associated with a Delivery Point may view all versions of the metering data.
The version number is incremented whenever the metering data is modified due to estimation or editing.
requested through the submission of a request file will be supplied in the
version specified in the request file. The options regarding the version of
metering data selected for display are as follows: Current, Current Validated,
Version #, First and Use Date. An additional option enables metering data to be
displayed with or without losses.
- How can the MSP get a copy of the Metering Installation Registration Tool (MIRT)?
Information on how to access MIRT is provided to all registered Metering Service Providers on request.
- Where do I get more information?
For more information, contact the IESO at:
Toll Free: 1-888-448-7777