8 Wholesale Market Metering
Metering Data Agents
8.1. Metering Data Agents
8.1.1. There must be a Metering Data Agent for each Network.
8.1.2 Subject to clause 8.1.4, the Network Operator is also the Metering
Data Agent for any Network registered by that Network Operator.
8.1.3. A Metering Data Agent must operate to the relevant Metering
Protocol.
8.1.4. If the Network Operator in respect of a Network notifies AEMO and
the Network business unit of the Electricity Network Corporation that it does not wish to be the Metering Data Agent for a Network registered by that Network Operator, the Network business unit of the Electricity Network Corporation will be the Metering Data Agent for that relevant Network.
8.2. Duties of a Metering Data Agent
8.2.1. A Metering Data Agent must:
\(a\) keep the Meter Registry updated in accordance with clause 8.3; and
\(b\) provide metering data to AEMO in accordance with clause 8.4.
Meter Registry
8.3. Meter Registry
8.3.1. Each Metering Data Agent must maintain a separate Meter Registry
for each Network it serves. At a minimum, the Meter Registry for a Network must:
\(a\) record each meter connected to the Network;
\(b\) record the Market Participant(s) whose generation or consumption is measured by the meter;
\(c\) facilitate changes to the identity of the Market Participant(s) whose generation or consumption is measured by a meter as of a specified time;
\(d\) record how metered quantities are to be allocated between Market Participants if more than one Market Participant’s generation or consumption is measured by that meter.
8.3.2. In processing a Facility registration application under clause
2.31, AEMO must notify the applicable Metering Data Agent that it requires confirmation that all Meter Registry information associated with that application is correct.
8.3.3. A Metering Data Agent must within five Business Days from the day
of being notified by AEMO in accordance with clause 8.3.2 confirm the Meter Registry information.
8.3.4 If AEMO accepts a Facility registration or Facility
deregistration, it must notify the Metering Data Agent for the relevant Network and the Metering Data Agent must, within five Business Days, ensure that the Meter Registry is adjusted accordingly.
8.3.5. A Metering Data Agent must notify AEMO of any changes to the
identities of the Market Participants whose supply or consumption is measured by a meter not less than 10 Business Days prior to the Meter Data Agent making a Meter Data Submission that reflects the changed metering arrangements.
8.3.6. AEMO must provide a Metering Data Agent with confirmation of a
notification made in accordance with clause 8.3.5 within one Business Day.
8.3.7. If a Metering Data Agent fails to receive a confirmation of
receipt in accordance with clause 8.3.6 it must contact AEMO within one Business Day to appraise AEMO of the failure of AEMO to provide confirmation of receipt and, if necessary, to make alternative arrangements for the submission of the information.
Meter Data Submissions
8.4. Meter Data Submission
Explanatory Note Clause 8.4.1 is amended to require Western Power to provide Meter Data Submissions on a weekly basis to enable AEMO to implement a weekly settlement timeline. The Metering Code is to be amended to compliment the amendments to Chapter 8. |
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8.4.1. A Metering Data Agent must provide Meter Data Submissions to AEMO
in accordance with the time specified in clause 9.3.2.
8.4.2. A Meter Data Submission must be in the format described in clause
8.6.
Explanatory Note Clauses 8.4.3, 8.4.4 and 8.4.5 are deleted to streamline administrative processes. The head of power in clause 8.6.2 is being amended to require AEMO to outline these processes in a WEM Procedure. |
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8.4.3. [Blank]
8.4.4. [Blank]
8.4.5. [Blank]
8.5. Notices of Disagreement and Disputed Meter Data
8.5.1. In the event of a Notice of Disagreement or Notice of Dispute
that relates to meter data, AEMO must notify the Metering Data Agent responsible for that data of the Notice of Disagreement or Notice of Dispute.
8.5.2. A Metering Data Agent must respond to the notification described
in clause 8.5.1 in accordance with the Metering Protocol referred to in clause 8.1.3 and must include any revised meter data in the first Meter Data Submission made to AEMO following any correction of the meter data.
Explanatory Note Section 8.6 is amended to:
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8.6. Format of Meter Data Submissions
8.6.1. A Meter Data Submission must comprise:
\(a\) the identity of the Metering Data Agent;
\(b\) the Trading Week to which the meter data relates;
\(c\) for each interval meter and each Trading Interval in the Trading Week in the Meter Data Submission described in paragraph (b):
i. the identity of the meter;
ii. the MWh quantity measured by the meter; and
iii. whether the quantity described in paragraph (ii) is based on an actual meter reading or an estimate, and if based on an estimate, the applicable code describing the reason for the estimate;
\(d\) [Blank]; and
\(e\) meter adjustments that stem from actual or revised meter data becoming available or from the resolution of a dispute concerning meter data (“Meter Dispute”) in accordance with the dispute resolution process in the applicable Metering Protocol, including:
i. for each interval meter and each Trading Interval in the Trading Week to which a Meter Dispute has resulted in changes to meter data:
1. the MWh quantity for that meter;
2. whether the quantity described in paragraph (1) is based on an actual meter reading or an estimate, and if based on an estimate, the applicable code describing the reason for the estimate; and
3. the applicable code describing the reason for the change in the MWh quantity relative to the previously stated value.
8.6.2. AEMO must document in a WEM Procedure:
\(a\) the format of Meter Data Submissions to be provided by Metering Data Agents; and
\(b\) the processes that must be followed by Metering Data Agents when making Meter Data Submissions.
Meter Connection and Disconnection
8.6A. Provision of Meter Information
8.6A.1. A Metering Data Agent must provide AEMO with the following
information for each Trading Month:
\(a\) the number of non-interval or accumulation meters that existed at the end of the Trading Month;
\(b\) the number of new non-interval or accumulation meters connected during the Trading Month; and
\(c\) the number of non-interval or accumulation meters abolished during the Trading Month.
8.6A.2. The information referred to in clause 8.6A.1 must be provided by
the Metering Data Agent no later than the Interval Meter Deadline for the first full Trading Week that occurs after the relevant Trading Month to which the information referred to in clause 8.6A.1 relates.
Metering Protocol Requirements
8.7. Metering Protocol Requirements
8.7.1. A Metering Data Agent must operate in accordance with a Metering
Protocol. As a minimum a Metering Protocol must prescribe:
\(a\) that the Metering Data Agent maintains a Meter Registry tracking a unique identifying number for each meter and the location of that meter, and indicating which Market Participant, if any, is associated with that meter;
\(b\) that interval meter data is recorded for a 30 minute period starting on the hour and on the half-hour;
\(c\) a process for replacing missing or inaccurate metering data with estimated data to be included in Meter Data Submissions;
\(d\) a process for addressing metering data errors stemming from errors in meter reading, failure to read a meter and falsification;
\(e\) a dispute resolution process pertaining to actions taken in accordance with that Metering Protocol; and
\(f\) a process for modification of the Metering Protocol in the event of changes to the WEM Rules.
Support of Calculations
8.8. Support of Calculations
8.8.1. Each Metering Data Agent must provide to AEMO within five
Business Days of being requested, any of the meter information held by the Metering Data Agent that is required by AEMO for the purposes of these WEM Rules.
Explanatory Note Chapter 9 has been restructured for ease of reading and to reflect that there are substantial changes to settlement calculations, including due to the new ESS framework and causer pays approach to cost recovery. In addition, the former STEM and NSTEM settlement timelines have been merged into a single settlement timeline, including with a single settlement statement, to decrease administrative burden. Complex calculations for the following have been included in appendices:
Clauses 9.1.2(g)(ii) and 9.13.1 are also amended by the Governance Amendments that commence on 1 July 2021 to introduce "Coordinator Fees" and "Coordinator Fee rate", as applicable. However, as Chapter 9 is deleted and replaced by the Tranches 2 and 3 Amendments, Chapter 9 only shows the Tranches 2 and 3 Amendments as they are the amending rules affecting this section (made by the Minister at the date this companion version was prepared) that will be commenced last. Please refer to the Governance Amendments to see the changes to Clauses 9.1.2(g)(ii) and 9.13.1 that will commence on 1 July 2021. Various clauses in Chapter 9 are also amended by the October 2021 RCM Pricing Amendments, including as a result of tranche based dispatch payments for DSPs ceasing from the 2019 Reserve Capacity Cycle (i.e. from the 2021 Capacity Year), the Tranche 1 Amendments and the Miscellaneous Amendments No. 1. As Chapter 9 is deleted to reflect the amendments contained in the Tranches 2 and 3 Amendments, as those amending rules (made by the Minister at the date this companion version was prepared) will be commenced last, please refer to the October 2021 RCM Pricing Amendments, Tranche 1 Amendments and Miscellaneous Amendments No. 1 to see the changes to Chapter 9 that will either apply until the Tranches 2 and 3 Amendments to Chapter 9 commence, or that amend amending rules contained in the Tranches 2 and 3 Amendments. |
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