Individual Reserve Capacity Requirement (IRCR) Information

To fund capacity procured through the Reserve Capacity Mechanism, each Market Participant is assigned an Individual Reserve Capacity Requirement (IRCR) obligation based on their contributions to the system peak. The IRCR is calculated monthly, in accordance with Appendix 5 of the Market Rules.

Each month AEMO publishes information that can be used by Market Participants to reconcile their IRCR. This information can be found below.

12 Peak SWIS Trading Intervals

The 12 Peak SWIS Trading Intervals are used to determine a Market Participant’s IRCR in accordance with Appendix 5 of the Market Rules. The timestamp refers to the start of the interval (for example, Interval 15:00 is from 15:00 to 15:30).
Market Participants can determine the IRCR contribution of a meter that existed in the relevant Hot Season by:

1. determining the meter’s median consumption (MWh) within the relevant 12 Peak SWIS Trading Intervals
2. multiplying by 2, converting it into an average MW quantity
3. multiplying by the relevant ratios as published monthly.

· Current and Historical 12 Peak SWIS Trading Intervals

Individual Reserve Capacity Requirement Ratios

When determining the IRCR for Trading Month n in accordance with Step 8 of Appendix 5 of the Market Rules, the sum of the Market Participant’s Non-Temperature Dependent Loads (NTDL) and Temperature Dependent Loads (TDL) are adjusted by the NTDL_Ratio and TDL_Ratio respectively. The adjusted values are then summed for each Market Participant and multiplied by the Total_Ratio, in accordance with Step 10 of Appendix 5 of the Market Rules. This ensures the sum of all Market Participants’ Individual Reserve Capacity Requirements equals the Reserve Capacity Requirement.

· Current and Historical IRCR ratios

4 Peak SWIS Trading Intervals

The 4 Peak SWIS Trading Intervals are used to:

· determine a Market Participant’s IRCR in accordance with Appendix 5 of the Market Rules; and
· accept Non-Temperature Dependent Loads (NTDLs) in accordance with Appendix 5A of the Market Rules.

The timestamp refers to the start of the interval (for example, Interval 15:00 is from 15:00 to 15:30).
Market Participants can determine the IRCR contribution of a new meter by:

1. determining the meter’s median consumption (MWh) within the relevant 4 Peak SWIS Trading Intervals
2. multiplying by 2, converting it into an average MW quantity
3. multiplying by either 1.1 for a NTDL or 1.3 for a TDL
4. multiplying by the total ratios as published monthly

· Current and Historical 4 Peak SWIS Trading Intervals

Provision of information for the purposes of IRCR

For AEMO to determine Individual Reserve Capacity Requirements in accordance with clause 4.28.7, Market Participants must, by 5.00 pm on the last Business Day falling on or before 20 August of Year 3 of a Reserve Capacity Cycle (MR 4.1.23), provide to AEMO the information described in clause 4.28.8.
In accordance with the Market Procedure for: Individual Reserve Capacity Requirements, AEMO will provide details on the website as to the nature and format of the data that must be submitted.

Data requirements for IRCR

Market Participants must provide AEMO with the information detailed in clauses 4.28.8 and 4.28.8C of the WEM Market Rules.
In accordance with clause 4.28.11, a Market Participant may only provide AEMO with the information specified in these clauses once for each load for each Capacity Year.

Please address all email correspondence to wa.settlements@aemo.com.au

Please address all letters to:

Teresa Smith, Group Manager - WA Operations
AEMO (WA)
PO Box 7096
Cloisters Square, Perth, WA 6850
Phone: (08) 9469 9800
Fax: (03) 9609 8080
Email: wa.settlements@aemo.com.au