Reconciliation Support Workshop

Reconciliation Support Workshop
Wednesday, 22 May 2019 AEMO Melbourne office Level 22, 530 Collins Street, Melbourne

Agenda – Change in Approach
Welcome and housekeeping Facilities, phones, laptops and leaving the room Approach for today Objectives and context for the workshop High-level summary of 5MS and Global Settlements (GS) Settlement and Reconciliation – today and in the future General Business and Next Steps

Approach and Questions Before We Start
Guided conversations AEMO resources in the room May need to park some conversations Composite of the group Operations vs systems Retailer vs Generator vs MSP vs Distributor vs Other Previous experience in the areas being discussed Meter data mgt, Standing data mgt and Settlements Expectations for today e.g. level of detail, outputs, etc.

Notes – Introduction and welcome
Blaine Miner of AEMO welcomed participants and AEMO staff to the workshop He went through the agenda for the day and started by confirming the breadth of representation in the workshop by highlighting the AEMO SMEs in attendance and the cross section of organisations and areas of expertise of participant attendees High representation of Retailers and some Generators Strong cross section of operational and system experts Blaine did note that while the content of the slides had for the most part not changed, compared to what was distributed prior to the workshop, the sequence of the slides had been modified to better support the flow of today’s conversations

Objectives and Context of the Workshop

Objectives of the Workshop
To communicate how AEMO performs market settlements today To understand the various approaches market participants currently adopt in reconciling market charges Including understanding the current pain points faced by market participants today To ensure a common understanding of the 5MS and GS rules To communicate how AEMO expects to perform market settlements in a 5MS/GS environment To discuss how industry expects to reconcile market charges in a 5MS/GS environment Including pre-emptively identify potential issues industry may face either transitioning to or in a 5MS and GS environment To identify potential opportunities in minimising/managing these potential issues To discuss next steps in progressing any industry opportunities identified

NEM Electricity Data Flows

System Change Heatmap

Notes – Objectives and Context
Attendees mentioned that the Workshop conversations needed to consider items beyond the AEMO/wholesale perspective E.g. Customer billing, network charges, etc. AEMO was more than happy for broader considerations to be raised throughout the day It was noted that while the Workshop would highlight and discuss key matters, it was not a decision-making forum AEMO mentioned the various existing channels for participants to formally and informally provide feedback to AEMO, including: 5MS forums, working groups and focus groups Consultation submissions 5MS Inbox 5MS Change Requests Workshop attendees commented and expected that many of the issues raised during the workshop weren’t necessarily matters for AEMO to ‘fix’ but that industry would need to remedy them amongst themselves.

High-level summary of 5MS and GS

AEMC - 5MS Final Determination
5MS - Re-cap AEMC - 5MS Consultation ( ) SunMetals submitted Rule Change in Dec 2015 Series of consultations by AEMC with stakeholders through 2016/17 AEMO noted implementation complexity and desirability of transition approach AEMC - 5MS Final Determination (Dec 2017) Policy work complete, stakeholder views considered, definition of change is clear Focus moves to execution AEMO established 5MS Project, allocated resourcing and initial funding Stakeholder forums defined and established Implementation options assessment commenced AEMO Execution (2018-today) Stakeholder forums up and running Procedures development and consultation well underway AEMO implementation options assessment and due diligence completed

5MS - Impact on the industry
Prior to July 2021 From July 2021 Generators / SGAs Review/update procedures Review/update contracts Review/upgrade IT systems Submit five minute granularity offers into the NEM Large customers Submit five minute granularity bids into the NEM Retailers Consider developing new products and services using 5 minute data to value dynamic generation / demand response for small and large consumers Networks Calculate charges for distribution services from either metering data or settlements ready data for type 4 meters Calculate type 7 unmetered loads on a 5 minute basis. Metering coordinators Upgrade types 1, 2 and 3 metering installations, and some type 4, to be capable of recording and providing five minute data. Ensure that new and replacement metering installations are capable of recording and providing 5 minute data By 1 December 2022 at the latest, ensure that all new and replacement metering installations record and provide 5 minute data Metering data providers By 1 July 2021, ensure that type 1, 2 and 3 and some type 4 metering installations record and provide five minute data. By 1 July 2021, ensure that type 7 unmetered loads are calculated on a five minute basis. Changes to meter data delivery requirements to AEMO MDFF for interval, Active and Reactive, register level Information Exchange Committee Consult and recommend to AEMO any changes to the B2B procedures Example footer text 3/07/2019

5MS - High Level Metering Requirements
Progressive re-configuration of interval meters to allow the measurement and delivery of five minute metering data. Types 1, 2 and 3 meters to record and store five-minute data from the commencement date of the rule. Type 4 meters at a transmission network connection point or distribution network connection point where the relevant financially responsible Market Participant is a Market Generator or Small Generation Aggregator to record and store five-minute data from the commencement date of the rule. All other types 4, 4A, 5 and 6 meters that are already installed do not need to provide five-minute data at the commencement date. The data from these meters will be profiled to five-minute trading intervals by AEMO using load profiles. All new and replacement metering installations, other than type 4A, installed from 1 December 2018 must provide five-minute data from 1 December 2022 at the latest. All type 4A new and replacement metering installations installed from 1 December 2019 must provide five- minute data from 1 December 2022 at the latest Key functional implications include: Moving from 30-min settlement to 5-min settlement e.g. 5-min spot prices AEMO and Participant systems to deliver, receive and apply five minute metering data (as applicable) New profiles being introduced to convert 15 and 30-min metering data to 5-min resolution Controlled Load Profiles (CLP) and Net System Load Profiles (NSLP) to change from 30-min to 5-min

Settlements by Difference vs Global Settlements

Global Settlement (GS)- Implementation timeline
1 December 2019 AEMO procedures updated for both 5MS and GS 1 July 2021 5MS begins AEMO starts publishing UFE data (‘soft start’) 6 February 2022 GS begins 1 March 2022 AEMO’s first annual report on UFE trends New annual report [NER B] and new reporting guidelines [NER B(d) and ] New procedure required [NER (d) and ]

Notes – High-level summary of 5MS and GS
AEMO including these slides to ensure a common understanding of the 5MS and GS Rules AEMO noted that there are approximately 19k meters that must be providing 5-minute metering data from 1 July 2021 AEMO noted that only a subset of MDPs support these particular meters and suggesting that these specific MDPs would be highlighted during Readiness activities to ensure a successful 1 July MS Go-live AEMO noted that the conversation surrounding five minute metering data had evolved from delivery and reception to functional application of this information in key wholesale and participant based activities AEMO suggested that participants should be discussing their requirements, including any transitional arrangements, with their MCs/MDPs as soon as possible Including, any aggregations of five minute meter reads to 15 and 30-minute levels pre and post 1 July 2021 AEMO advised that there would most likely need to be an ‘update’ to MDPs accreditation to ensure appropriate systems and processes are in place to support five minute metering data provisioning

Notes – High-level summary of 5MS and GS
Workshop attendees queried how AEMO will be supporting Readiness activities and how AEMO would ensure Readiness of particular participants when AEMO cannot mandate various aspects and participation AEMO recognised the challenges but mentioned that they have developed a program to support successful implementation, and are open to further input from the industry on any further activities AEMO noted that Readiness had been discussed within AEMO for a number of months and that nominations are now open for the Readiness Working Group (RWG) The RWG is scheduled to meet late June/early July The AEMO Readiness plan and approach would be tailored to mitigate/manage key risks including MDP readiness who have a high proportion of 5-minute data to be delivered from 1 July 2021. Market trials are expected to be leveraged as a key component of assessing market readiness, across all participants. AEMO expected that all ‘priority’ MDPs would need to participate in the first round of market trails

Settlements and Reconciliation

Reconciliation, what is it and why is it needed?
What is your primary objective in reconciling AEMO’s settlement statements? Gain confidence in the settlements calculation and that the subsequent amounts are correct? Gain confidence in the inputs used (standing data, meter data and spot prices)? Gain confidence in information for downstream processes and activities e.g. customer billing, network billing, financial reporting and Trading? Allow hedge (and other secondary market) contracts to be settled? Determine the profitability of customers and products? Meet the demands of internal and/or external auditors? What AEMO provided data is most important to participants and why?

Notes – Why participants reconcile AEMO charges
Participants specifically called out: Evidence to the Board and auditors that the amount paid to AEMO was ‘correct’ Regulatory and financial obligations To support revenue and cost assurance activities Standing and meter data integrity checks

AEMO’s Market Settlement Process (Today)
1 2 3 4 Maintain and Receive Standing and Meter Data Settlement Load Aggregations and Profiling Spot Prices and MLFs Settlement Cycles and Settlement Case IDs 5 6 7 Settlement Report and Tax Invoice RM Reports, DI Data and EMMS Data Model MSATS Browser Interface

AEMO’s Market Settlement Process (5MS/GS)
1 2 3 4 Maintain and Receive Standing and Meter Data Settlement Load Aggregations and Profiling Spot Prices and MLFs Settlement Cycles and Settlement Case IDs 5 6 7 Settlement Report and Tax Invoice RM/UFE Reports, DI Data and EMMS Data Model MSATS Browser Interface Legend High impact Medium impact No impact

Maintain and Receive Standing and Meter Data
1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What AEMO does today? Standing Data Mgt NMI standing data is maintained in MSATS The CATS and WIGs procedures describe the various transactions available to market participants to create and maintain standing data associated to NMIs The procedures specify the conditions, obligations and notifications associated to each Change Reason Code CR 1000 series – transfer of NMIs between Retailers CR 2000 series – creation of NMIs CR 3000 series – creation and maintenance of meter registers CR 4000 series – creation and maintenance of datastreams CR 5000 series – maintenance of various participant relationships Meter Data Mgt AEMO currently receives meter data from MDPs in Meter Data Management Format (MDMF), for both interval and basic meter reads MDPs have certain obligations regarding how, when and what meter data needs to be sent to AEMO, including: Aggregating interval metering data for a connection point to 30-minutes Netting interval metering data prior to delivery to AEMO (N1=E1-B1) Creating and maintaining Net datastreams for interval meters MDPs must deliver to AEMO settlements ready data, by the dates and for the periods, specified in the Data Delivery Calendar Meter data time/date stamp needs to be greater than the stored meter data record for the meter data values to be updated

Notes – Standing and Meter Data today
Discussed current pain points regarding meter data versioning: Workshop attendees said it was common for a Retailer to encounter energy reconciliation variances due to meter data versioning issues AEMO noted that MDPs currently have to send out 2 different meter data files, MDMF to AEMO and MDFF to participants, which may be contributing to the issue being experienced Which is a key reason why AEMO is transitioning to MDFF for interval metering data in 2021. There was broad acceptance that timing issues cannot be fully mitigated, due to timing delays between AEMO calculating the charges and a participant reconciling the charges, but that additional information in the relevant RM reports may assist identifying these instances in a more efficient manner E.g. Potent opportunity to include MDP version date/time stamps, used in AEMO NEM Settlement calculations, in the RM reports Workshop attendees indicated that this would be useful information. Other discussions occurred regarding other potential inclusions such as meter read quality flags AEMO suggested that these potential opportunities should be further considered by participants and for any final feedback to be provided through the previously discussed channels, including their Metering Package 2 consultation submissions AEMO mentioned that it would perform some analysis to see if meter data time/stamp inconsistencies was an existing issue between the MDMF and MDFF files If it is, AEMO would raise the issue at the June Metering Focus Group (MFG) meeting

Notes – Standing and Meter Data today
AEMO enquired whether workshop attendees experience issues in synchronising with MSATS Standing data and how this synchronisation occurred. Various approaches were currently being performed, depending on the participant: Some relied on CATS notifications while others relied on C4 reports When it comes to metering, some used CR4000 notifications (Datastream table) where others used CR3000 notifications (Register table) and then others used the MDFFs themselves Some participants mentioned that it wasn’t synchronisation that was the issue but rather the delay in relevant parties e.g. distributors, MPs and MDPs updating the standing data in MSATS Overall, synchronisation did not appear to be a major issue – largely more of a timing issue

1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What’s expected to change? Standing Data Mgt All connection point NMIs will be maintained in MSATS, including first tier and Non-Contestable Unmetered Loads Non-Contestable Unmetered Loads will be explicitly allocated for in market settlements Changes to LR role (for Large and Small NMIs) and the FRMP role (for boundary NMIs) e.g. GLOPOOL Treatment of cross boundary/border supply points between distribution networks or Local Retailer regions Introduction of Embedded Network Local Retailer (ENLR) Introduction of new NMI Classification Codes and new Meter Installation Type Code to support numerous MSATS Standing Data scenarios Over 30 distinct scenarios have been identified, covering transmission, distribution and embedded network connection points

1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What’s expected to change? Meter Data Mgt All interval metering data must be delivered to AEMO by MDFF from 1 July 2021 AEMO will be able to receive 5 and 15 minute read data prior to 1 July 2021, start date to be agreed Tier 2 metering data will no longer be delivered to LRs by MDPs from the commencement of GS (6 Feb 2022), LR will be GLOPOOL TNI/Boundary meter data will no longer be delivered to LRs/FRMPs by MDPs from the commencement of GS (6 Feb 2022), FRMP will be GLOPOOL. Changes in the delivery of meter data to AEMO MDFF NEM12 files to be the required file format for all interval meter data from 1 July 2021 MDPs will no longer aggregate sub intervals of 30-mins i.e. AEMO will receive 5, 15 and 30-min meter data from 1 July 2021 Register level import and export active and reactive meter data is to be delivered from 1 July 2021, where applicable Transition from Net datastreams to register level datastreams from 1 July 2021 in the CNDS table Register level datastreams need to be created by 1 July 2021 for type 1, 2, 3 and subset of type 4 meters Remaining type 4, 4A and 5 meters will be updated to register level when a record needs to be updated or created in the CNDS table AEMO will be able to receive register level meter data where a Net datastream still exists during this transition AEMO will use the RM11 report (automated) to communicate meter data exceptions to MDPs

Notes – Standing and Meter Data Future
AEMO commented that there would need to be quite a few changes in CATS/MSATS to accommodate the various scenarios associated with the requirements of GS. For example, how the FRMP and LR fields are to be populated in certain situations and what additional NMI Classification Codes and Meter Installation Type codes would be required to enable the accurate settlement of the market AEMO commented that under the GS Rule, LRs would no longer receive 1st tier lost customer and TNI/boundary metering data and that participants should consider what that means for various down stream activities e.g. financial reporting, load forecasting, etc. AEMO commented that it had identified almost 40 scenarios to date that needs to be allowed for, including cross border supply and non-contestable unmetered loads. Workshop attendees suggested that visibility of this information would be very useful to enable appropriate Metering Package 2 consultation feedback. AEMO stated that this information would be shared with industry shortly, through various 5MS engagement channels e.g. June MFG as well as through the Metering Package 2 consultation Workshop attendees enquired how AEMO would provide assurances that standing data updates are ultimately applied correctly? AEMO advised that standing data updates would be applied in partnership with relevant participants and would likely form part of the 5MS test plan

Profiling and Settlement Load Aggregations
1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What AEMO does today? Profiling The Metrology Part B Procedure details the load profiling requirements and calculations Profiling requirements vary between Jurisdictions The two profile types are Net System Load Profiles (NSLPs) and Controlled Load Profiles (CLPs) CLPs are determined through the use of remote acquisition sample meter metering data At least 200 Controlled Load sample meters are to be installed for the purposes of calculating each CLP within a profile area unless otherwise agreed by AEMO AEMO must apply the NSLP: For the Profile Area to which the NMI is connected, To the metering data for tier 2 type 6 metering installations Trading interval data is required to be calculated by NMI Datastream for those loads with type 7 metering installations.

Profiling and Settlement Load Aggregations
1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What AEMO does today? Settlement Load Aggregations The MDM Procedure details how the settlement load aggregation process works Settlement Data Processing consists of: Profile calculation (called ‘Profile Preparation Service’ for CLP and NSLP) Profile application (called ‘Basic Meter Profiling’ for non-NSLP and NSLP) and Settlements energy (load) aggregation. A profile shape is used to derive trading-interval level consumption of energy from an Accumulation Meter reading. The purpose of Profile Preparation Service (PPS) is to prepare NSLPs with or without peel-off and to prepare non-NSLPs. Profiles may also be generated externally and provided to MDM, for example, by an MDP. The purpose of Basic Meter Profiling (BMP) is to apply profile shape data to non-interval Datastream (Accumulation Meter) metering data to create half-hourly profiled interval metering data. This is required for all Tier 2 Datastreams and those Tier 1 Datastreams needed for NSLP Peel-off. The purpose of the settlements load aggregation process is to take metering data from wholesale and second-tier customer interval Datastreams, and second-tier customer interval metering data produced from the BMP process and to aggregate them by the FRMP, Local Retailer, MDP, TNI, and Datastream type. Note that DLFs are applied in this process. This aggregated data is then further aggregated by the FRMP, Local Retailer, and TNI and then loaded into AEMO’s settlements system. Non-aggregated generation data is also loaded into AEMO’s settlements system.

Profiling and Meter Data Aggregations
1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What’s expected to change? Profiling 5MS Changes are required to PPS to accommodate the transition of 15 and 30-min meters to 5-min resolution i.e. most 15 and 30-min meters will not have to be converted to 5-min by 1 July 2021 Additional profiles will be introduced to support the conversion of 15 and 30-min interval metering data to 5-min resolution 2 different methodologies are to be applied to non-controlled loads and controlled loads (sample meters) These changes are specified in the 5MS Metrology Part B procedure GS No new profiles are required to support GS Settlement Load Aggregations No significant changes to the Settlements Load Aggregation process expected All NMIs included Inclusion of Non-contestable Unmetered Loads

Notes – Profiling and Meter Data Aggregations
AEMO commented they will be implementing changes to profiling to allow for the profiling of 15 and 30- minute metering data from 1 July 2021 AEMO commented that as all connection points would be required to settle the market in a GS environment, 1st tier accumulation meter reads would now need to be profiled to support settlement calculations AEMO commented they have been approached by a market participant to potentially provide profiled meter data to Retailers – at data stream level. AEMO commented that this would be a lot of data and consideration should be done by Retailers as to how the data would ultimately be applied e.g. how would the Retailer know that the meter read that the profiled data was based on matches the meter read they have in their database?

Spot Prices and MLFs Spot Prices
1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What AEMO does today? Spot Prices The dispatch price is determined every 5-minutes, and six (6) dispatch prices are averaged every half-hour to determine the spot price for each trading interval for each of the NEM regions Trading interval comprises six (6) 5-minute dispatch intervals Spot Price is used to settle financial transactions for all electricity traded in the NEM Marginal Loss Factors (MLFs) Electrical losses occur when energy from generators moves through high voltage transmission lines to energy users Mathematical representation of transmission losses (between a connection point and regional reference node) are applied to spot prices used for energy settlement

Spot Prices and MLFs Spot Prices
1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What’s expected to change? Spot Prices Alignment of settlement period with dispatch period; trading interval definition to change from 30-min to 5-min Current dispatch price (5-min) will be Spot Price which will be used to settle electricity traded in NEM Settlement transactions to be calculated for each 5-minute period MLFs No change to the treatment of MLFs

Notes – Spot Prices and MLFs
AEMO indicated there are minimal changes to Spot Prices and MLFs with the implementation of 5MS and GS AEMO commented that dual MLF’s, which currently exist today, will continue to exist in a 5-minute environment. AEMO stated there can only ever be one applicable MLF at a 5-minute interval however, in some scenarios such as Pumped hydro, the MLF can switch based on whether it is importing or exporting.

Settlement Cycles and Settlement Case IDs
1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What AEMO does today? Settlement Cycles A Billing Period is a period of seven (7) days commencing at the start of trading interval ending 12.30am Sunday The statement is a consolidation of settlement amounts for wholesale market energy traded including ancillary services, reallocations and interventions Preliminary statements are issued as an indication of upcoming financial settlements amounts Final statements (financial settlement) are issued to incorporate any changes to metering or billing data since the Prelim statement was calculated Revision 1 and 2 (20-week and 30-week respectively) statements incorporate further changes to metering or billing data since financial settlement occurred Settlement Case IDs Metering data used (and its associated datastreams) for wholesale settlement is released to participants in the form of Settlement Case IDs RM16 & RM 17 – interval metering data RM27 – aggregated daily totals

Settlement Cycles and Settlement Case IDs
1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What’s expected to change? Settlement Cycles Effective date of 5MS (1 July 2021) occurs mid billing week Settlements system to start performing processes based on 5-min trading intervals from 1 July 2021 In the transition week (27 June 2021 to 3 July 2021), the settlements engine will handle both 30-min trading intervals (for settlement days prior to 1 July 2021) and 5-min trading intervals (for settlement days from 1 July 2021) Settlement Case IDs On transition week, one Settlement Case ID will be produced as per the current process Transition week will contain 30-min (27 June to 30 June) and 5-min energy data (1 July to 3 July)

Notes – Settlement Cycles and Settlement Case IDs
AEMO stated that there are no proposed changes to Settlement Cycles or Settlement Case IDs One attendee suggested that this may be challenging in the early stages of UFE i.e. the current cycles may not provide sufficient time to stabilise the effect of UFE for on-market financial settlement purposes AEMO noted that the associated procedures had recently been consulted on and no changes had been adopted Workshop attendees enquired how the 5MS transition week would be handled i.e. how the market would be settled on both a 30-minute and 5-minute basis AEMO advised that its systems would be able to calculate on a 30-minute basis for periods up to 30 June and then on a 5-minute basis from 1 July 2021 Only one settlement case and one tax invoice would be generated for the transitional trading week

Settlement Report and Invoice
1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What AEMO does today? Invoice The Summary statement (PDF) aggregates settlement transactions into single line item amounts Settlement Report (SR) Is a detailed settlement text statement specifying the breakdown of transactions listed in the invoice Energy Settlement Residue Auction allocations Reallocations Ancillary Services Security Deposits Interventions (MR, Directions, RERT) Pool Fees Supporting Data Confidential (participant-specific) settlement and billing data information is provided at half-hourly interval granularity

Settlement Report and Invoice
1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What’s expected to change? Settlement Report (SR) UFE Publishing obligation to coincide with 5MS commencement – 1 July 2021 A new column will appear in the settlement report (SR) displaying the apportioned UFE in the energy transaction section UFE will be apportioned based on allocated for energy at the TNI level No financial explicit settlement of UFE until GS go-live on 6 February 2022 On the transition week, one SR will be produced as per the current process Settlement Invoice No change to the settlement invoice

Notes – Settlement Report and Invoice
Most of the discussion was in relation to the inclusion of Unaccounted for Energy (UFE) Retailers mentioned that they must provide customers 6 months notice of any price/structural changes Allowing for related system/communication changes, the lead time may actually be 12 months AEMO mentioned that UFE will be published by AEMO between 1 July 2021 – 5 Feb 2022 but that UFE would not be included in Settlement statements/tax invoices until 6 Feb 2022 The Exact format as to how UFE will be included in the SR is still to be finalised UFE will be recalculated and reallocated for each settlement cycle UFE dollars will not be published in the SR, UFE energy values will be AEMO mentioned and discussed some of the likely contributors to UFE Incorrect meter configuration (CT ratios), illegal connections, technical losses, profiling related issues, etc. AEMO mentioned that changes in UFE between settlement cycles should provide additional visibility around some of these contributors e.g. the impact of MDP forward estimates on profiling outcomes The quantification of these contributors would result in actionable activities e.g. targeted rollout of 5-minute meters, reducing issues associated to profiling

RM Reports What AEMO does today? RM Reports
1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What AEMO does today? RM Reports Participants and AEMO have access to a suite of RM reports generated via the MSATS system RM reports span across Metering Data and Settlements functional areas and are used by: AEMO to ensure and verify necessary quality and quantity of metering data for Settlements AEMO to provide details of Metering Data & Settlement data used in Settlement calculations Participants to reconcile AEMO Settlement Invoices Recipients of RM reports are determined based on Participant roles or Participant subscription (e.g. a participant has subscribed to receiving a specific report) RM Reports may be automatically generated via a system trigger (e.g. triggered as part of a Settlements run), scheduled to run or generated on request (i.e. adhoc)

RM Participant Facing report
RM Reports 1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What AEMO does today? RM Reports The following provides details of intensively used RM Participant facing reports RM Participant Facing report Commentary RM16 Level 1 Settlement Reconciliation Report Provide aggregated interval metering data grouped by TNI, FRMP, LR, MDP, and DataStream type. This report is produced automatically upon settlement case approval and is also available on request. RM27 Level 2 Settlement Reconciliation Report Provide daily totals of load data for all NMIs for all TNI combinations for all MDPs. This is an automatically produced version of the RM21 (automated upon Settlement Case approval and distributed to subscribed participants) RM17 Level 3 Settlement Reconciliation for Non-Aggregated Data Provide interval metering data for all suffixes of a particular NMI that was used during a settlement run. Source data includes data supplied by an MDP for both interval DataStream's and accumulation DataStream's. This is an adhoc report request. RM20 Profile Shape Data Report Provide profile shape data returning all NSLPs and CLPs in report date range period. This is an automatically produced report upon settlement case approval and is also available on request.

Data Interchange and EMMS Data Model
1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What AEMO does today? Data Interchange is a set of cooperating applications to replicate, manage and monitor data between AEMO’s Wholesale Energy Market Systems and participant’s local database. AEMO-side reporting applications that generate structured .CSV files into the participant file server, where participant-side software consumes the files and replicates the data into one or more local DBMS’s. EMMS Data model provides detailed reconciliation data for all statements and invoices. What Industry does today? Pain Points Participant feedback has indicated there is a lack of clarity/information around tying back line items in the statement and/or the SR report, to specific tables and columns in the EMMS Data Model.

RM & UFE Reports RM & UFE Reports
1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What’s expected to change? RM & UFE Reports To support 5MS & GS requirements, participant facing RM reports have been assessed 4 new participant facing RM reports will be developed – including UFE report (RM43) RM43 - UFE Factors by Profile Area report This report will provide AEMO and Participants with the profile of each interval within each TNI, Profile area for each settlement run. UFE value for each profile area and each interval within each TNI. The report will be automatically triggered to current FRMP’s and MDP’s for each settlement run. Report shall be able to be manually requested via the MSATS browser by AEMO, FRMP, MDP, LNSP participants. 3 existing participant facing RM reports will be retired 9 existing participant facing RM reports will be updated RM Participant Facing reports will continue to be available on an adhoc request basis via the MSATS browser These changes will be included in the Initial Draft MDM Procedures, published as part of Metering Package 2 consultation

Key RM Participant Facing report
RM & UFE Reports 1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What’s expected to change? RM Reports The following table provides a summary of 5MS/GS impacts to intensively used RM Participant facing reports Key RM Participant Facing report Commentary RM16 ‘Level 1 Settlement Reconciliation Report’ Report payload (.csv) updated to reflect Settlement trading intervals (i.e. 5 or 30 minute) RM27 Level 2 Settlement Reconciliation Report Unimpacted RM17 ‘Level 3 Settlement Reconciliation for Non-Aggregated Data’ RM20 ‘Profile Shape Data Report’ Report payload (.csv) updated to reflect Settlement trading intervals (i.e. 5 or 30 minute). New profiles to support the conversion of 15 and 30-min to 5-min resolution

RM & UFE Reports What’s expected to change?
1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What’s expected to change? The following table provides a summary of all Participant facing RM reports GS is not expected to impact participant facing RM reports with the exception of, from the 6/2/2022, data contained within LR's RM reports will be significantly reduced. Some NMI’s will continue to be settled by difference (e.g. child NMIs, direct connected customers, etc.) where LR’s will continue to have relationships with those NMIs and subsequently receive/request participant facing RM reports In the transition Settlement trading week: Interval data will be reported in 48 interval periods for periods prior to 1/7/21 and 288 interval periods for periods from 1/7/21 Unimpacted participant facing RM reports * * No .csv payload change Retired Participant facing RM reports New Participant facing RM reports Updated Participant facing RM reports * * .csv payload change to include varying intervals RM9 RM11 RM21 RM27 RM14 RM15 RM18 RM37 RM38 RM39 RM43 RM11: AEMO to automatically push RM11 reports to MDP’s 2 business days prior to Final Settlement RM13, RM16: Updated to reflect meter read intervals (i.e. 5, 15 or 30 minute) RM16, RM17, RM20, RM22, RM25: Updated to reflect Settlement trading intervals (i.e. 5 or 30 minute) RM26: No schema change though ‘Flag’ field definition to provide for 288 quality flags

DI Data and EMMS Data Model
1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What’s expected to change? Data Interchange and EMMS Data Model 5-min settlement data interchange reports will use the same table names and structures as existing 30-min feeds, with the definition of PeriodID changing form a 30-min period (1 to 48) to a 5-min period (1 to 288). Data interchange data for settlement runs prior to July 2021 (e.g. Revisions) will retain a 30-min PeriodID. The granularity for any given settlement run could be determined through an “Interval Length” column in one of the settlements DI tables. New version of the Electricity data model for 5MS. This will be an optional upgrade as the data model will be backwards compatibility with the existing ‘legacy’ version. DI data for settlement runs prior to July 2021 (e.g. Revisions) will retain a 30-min PeriodID. Additional indicator will be added for ‘interval length’ to specify what the length of interval is with each settlement run. Current proposal is to add this indicator to the “DayTrack” table, with a column name of “Trading_Interval_Length”. DayTrack is the parent table for all NEM settlement runs, with a primary key of SettlementDate/SettlementRunNo. All settlement results tables in Data Interchange have these two columns as the first elements of the primary key, therefore any settlement results table can be directly joined back to DayTrack to determine the interval length. Interval Length needs to be looked at when comparing historic data and with both formats.

1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What’s expected to change? Data Interchange and EMMS Data Model – Global Settlements UFE included in reconciliation data at: TNI/FRMP level (Confidential) Local Area level (Public) In both Settlements and Billing timeframes Local area UFE to include total UFE as well as TFE, DDME, and ADME. Total AGE for each profile area to be published in a public report, broken down into Import and Export values. Individual datastream import and export will be netted off to a single net import or net export value across the NMI for each settlement interval, before aggregation to the local area level.

1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What’s expected to change? Data Interchange and EMMS Data Model – Global Settlements On 1st July 2021, AEMO will publish in the EMMS Data Model: Separate UFE, AGE, and ADME amounts in the SetCPData table on a per-TNI, per-interval basis. ADME will continue to be published as separate import energy (INEnergy) and export energy (XNEnergy) amounts. UFE and AGE will be published as single amounts. Separate UFE, AGE, and ADME amounts in the BillingCPData table. AGE will always be equal to ADME (Import – Export) until Global Settlements go-live. On 6th Feb 2022, AEMO will publish in the EMMS Data Model: The same UFE, AGE, and ADME amounts in the SetCPData and BillingCPData tables. AGE will now include the UFE component. Energy settlement dollar amounts will include the financial settlement of UFE, by virtue of UFE being include in AGE. TA = AGE x TLF x RRP.

RM/UFE Reports, DI Data and EMMS Data Model
1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What does the expected changes mean for Industry? Potential Pain Points Participant feedback has indicated there is a lack of clarity/information around tying back line items in the statement and/or the SR report, to specific tables and columns in the EMMS Data Model. Potential Mitigations Provide changes to the Data Model a few months prior to 1 July 2021 so participants have some flexibility on when to transition their systems. AEMO is considering providing a mapping document describing the relationships between line items on the statement, sections of the SR report, and the EMMS data model. Participants to highlight priorities for AEMO to provide mapping information between SR Reports and the EMMS data model.

Notes – RM/UFE Reports, DI Data and EMMS Data Model
AEMO elaborated on which RM reports are expected to be introduced, modified and retired Certain RM reports are being retired due to lack of use New RM 43 - UFE factors by profile area report being created to provide UFE by TNI and profile area. AEMO mentioned that some participants had approached AEMO to provide 30-minute reports post 1 July 2021, to support transitional activities Workshop attendees agreed that the provision of 5 and 30-minute RM reports would be beneficial in managing the system transition to 5-minute/GS. 7 workshop attendees agreed that this would be helpful. AEMO advised that should the associated CR be approved that 30-minute reports could potentially be made available via a subscription model AEMO also suggested that these 30-minute reports should have a finite life span AEMO confirmed that its first trend analysis report is required to be published by 1 March 2022 The initial report will have its constraints due to: Most trading weeks from 1 July 2021 to March 2022 not having reached R2 status yet Effects of seasonality not being able to be analysed since only 6mths of data will be available The potential of fundamental standing and metering data not being fully in place by 1 July 2021

Notes – RM/UFE Reports, DI Data and EMMS Data Model
RM reports in Transition week Workshop attendees asked whether AEMO would be issuing one or two RM reports for the transition week. AEMO advised this was still under consideration. AEMO requested for participants to provide their preferences e.g. mixed payload, separate transactions, etc. Data Interchange One attend mentioned that having a Data Interchange for Retail data (similar to the Data Interchange for Wholesale data) would be very useful The suggestion was met with mixed views AEMO suggested that for this request to be appropriately considered, the industry advocate should complete the 5MS Change Request form

MSATS Browser Interface
1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What AEMO does today? MSATS Browser Interface In respect to Settlements reconciliation, participants may interface with MSATS to investigate AEMO’s source data AS AT the date/time of Settlements (i.e. Standing data, Metering Data or Settlements Data) Participants currently interface with MSATS via the MSATS Browser and FTP Participants may view metering data via the MSATS Browser Participants may view interval metering data or accumulated metering data (i.e. ‘Quantity’) Search criteria is by individual NMI limited to a maximum of 7 days Interval metering data is displayed in 30-min resolution (as MDPs aggregate 15-min interval metering data to 30-min interval metering data ‘netted’ of import and export meter reads) Participants may obtain an extract of interval metering data by requesting a participant facing RM report RM16 & RM17 reports provide interval metering data Request criteria is by individual NMI limited to a maximum of 7 days

MSATS Interface MSATS Browser Interface
1 Maintain and Receive Standing and Meter Data 2 Settlement Load Aggregations and Profiling 3 Spot Prices and MLFs 4 Settlement Cycles and Settlement Case IDs 5 Settlement Report and Invoice 6 RM/UFE Reports, DI Data and EMMS Data Model 7 MSATS Browser Interface What’s expected to change? MSATS Browser Interface No new functionality expected in the MSATS Browser interface Participants will however be able to view interval metering data (as provided in MDFF file) at the resolution provided by the MDPs to AEMO 5-min, 15-min, 30-min or accumulated meter data (i.e. ‘Quantity’) and NMI level or datastream level as applicable Participants will be able to continue to extract meter data via RM reports 5MS/GS does introduce a new API (Application Programming Interface) MSATS Interface for all B2M transactions (e.g. CATS Change Requests, RM report requests/responses, etc.) enabling a more efficient mechanism to communicate large volumes of meter data RM report request screens to support new RM reports, retired RM reports will no longer be visible

General Business & Next Steps

General Business and Next Steps
Metering Package 2 and Package 3 consultations Timing, content and submission opportunities AEMO’s 5MS Program change request process Outline of the CR process (full details have been presented to the Program Consultative Forum (PCF)) Identify industry and AEMO sponsors Sponsors to raise CR Change Advisory Board (CAB) to review CR Discussion with PCF as required Outcome of CR assessment provided to sponsors and PCF (and AEMO stream leads if approved)

Notes – summary of opportunities
As part of discussions, there were four areas of opportunity that were identified. AEMO will now pursue these as potential change requests, assessing the level of cost/impact to the 5MS Program vs the expected benefits indicated by participants. Opportunity #1: Provision of version date/time, quality flag, and data type indicator as part of RM reports Opportunity #2: Continuation of 30-minute RM and settlement reports post 1 July 2021 to allow legacy participant systems to continue to operate. Opportunity #3: Provision of raw profiled data for all NMIs/data streams Opportunity #4: Explore the provision of retail standing data using data interchange

Reconciliation Support Workshop

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Reconciliation Support Workshop

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