WEM Electricity Statement of Opportunities
The Wholesale Electricity Market (WEM) Electricity Statement of Opportunities (ESOO) is prepared annually and presents AEMO’s Long Term Projected Assessment of System Adequacy (PASA) for the South West interconnected system (SWIS) in Western Australia. It provides AEMO’s forecasts and analysis of peak demand and operational consumption across a range of weather and demand growth scenarios for the next 10 years. These forecasts are used to determine the Reserve Capacity Requirement (RCR), the amount of generation, storage, and Demand Side Management (DSM) capacity required to meet the forecast peak demand for the relevant Reserve Capacity Cycle.
The WEM ESOO also provides information on:
- Generation, storage, and DSM capacity operating in the SWIS.
- Committed capacity, including expansions and new Facilities under construction.
- Capacity outlook and network development opportunities.
- Developments and emerging issues in the WEM.
2023 WEM ESOO
AEMO published the 2023 WEM ESOO report on 17 August 2023.
The 2023 WEM ESOO determines the RCR for the 2023 Reserve Capacity Cycle in relation to the 2025-26 Capacity Year. The report along with supporting documents including the data register and independent consultant’s report are available in the links at the bottom of this page.
Reserve Capacity Information Pack
The Reserve Capacity Information Pack is published annually at the same time as the WEM ESOO, and includes the following information:
- The Reserve Capacity Requirement for the relevant Reserve Capacity Cycle.
- A description of the Availability Curve to ensure that capacity is procured with sufficient availability.
- Instructions on how to obtain various documents from the AEMO website.
2023 Reserve Capacity Information Pack
The 2023 Reserve Capacity Information Pack for the 2023 Reserve Capacity Cycle is available in the links at the bottom of this page, along with historical information packs.
The 2023 Reserve Capacity Information Pack contains the following information:
- Reserve Capacity Requirement for the 2025-26 Capacity Years.
- Availability Curve results for the 2025-26 Capacity Years.
- Information on the Expressions of Interest processes from 13 January to 1 March 2023.
Contact
AEMO welcomes feedback on the 2023 WEM ESOO.
Please forward any queries to:
Group Manager, WA System Design & Transformation
AEMO
Level 45, 152 St Georges Terrace,
Perth WA 6000
Please direct any questions relating to the 2023 Reserve Capacity Information to the WA Reserve Capacity team.
Email: wa.capacity@aemo.com.au
Please direct any questions relating to the 2023 WEM ESOO to the WA Future System & Design team.
Supporting materials for the 2023 WEM ESOO
The WEM ESOO incorporates different sources and data sets. Supporting documentation for the 2023 WEM ESOO report can be found below.
2023 WEM ESOO Documents
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15/09/2023
2023 Wholesale Electricity Market Electricity Statement of Opportunities (WEM ESOO)
2.53 MB -
17/08/2023
2023 Reserve Capacity Information Pack
444.95 KB -
15/09/2023
2023 WEM ESOO Data Register – Figures
2.26 MB -
17/08/2023
AEMO Reliability Assessment 2023 – EY
2.29 MB -
17/08/2023
2023 WEM ESOO Visual Overview
161.73 KB
Previous WEM ESOO Documents
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2022
2022 WEM ESOO Documents
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17/06/2022
2022 Wholesale Electricity Market Electricity Statement of Opportunities (WEM ESOO)
2.56 MB -
17/06/2022
2022 Reserve Capacity Information Pack
428.14 KB -
17/06/2022
2022 WEM ESOO Data Register – Figures
1.36 MB -
17/06/2022
AEMO Reliability Assessment 2022 - RBP
1.1 MB -
17/06/2022
2022 WEM ESOO Visual Overview
297.09 KB
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2021
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29/10/2021
Electric Storage Resource Obligation Intervals for 2023-24 Capacity Year
178.49 KB -
16/08/2021
2021 WEM ESOO supplementary analysis – Response to Individual Reserve Capacity Requirement
360.77 KB -
17/06/2021
2021 Wholesale Electricity Market Electricity Statement of Opportunities (WEM ESOO)
4.36 MB -
17/06/2021
2021 Reserve Capacity Information Pack
503.33 KB -
17/06/2021
2021 WEM ESOO Data Register - Figures
3.15 MB -
17/06/2021
AEMO Reliability Assessment 2021 - RBP
897.42 KB -
16/06/2021
BIS Oxford Economics 2021 Macroeconomic Projections Report
3.14 MB -
16/06/2021
CSIRO 2021 DER Forecasts Report
1.87 MB -
16/06/2021
CSIRO 2021 EV Forecasts Report
1.47 MB -
16/06/2021
GEM 2021 DER Forecasts Report
9.9 MB
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2020
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27/08/2020
2020 WEM ESOO supplementary analysis - Response to Individual Reserve Capacity Requirement
365.46 KB -
16/06/2020
2020 Wholesale Electricity Market Electricity Statement of Opportunities (WEM ESOO)
3.43 MB -
16/06/2020
2020 Reserve Capacity Information Pack
266.51 KB -
16/06/2020
2020 WEM ESOO infographic
1007 KB -
16/06/2020
2020 WEM ESOO Data Register - Figures
5.34 MB -
16/06/2020
2020 WEM ESOO Data Register - Tables
322.94 KB -
16/06/2020
AEMO Reliability Assessment 2020 - RBP
1.29 MB
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2019
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28/11/2019
2019 WEM ESOO Reconciliation Report
136.41 KB -
20/06/2019
2019 Wholesale Electricity Market Electricity Statement of Opportunities (WEM ESOO)
2.71 MB -
14/06/2019
2019 ESOO Data Register - Tables
380.19 KB -
14/06/2019
Data register 2019 Final Version Figures
2.38 MB -
14/06/2019
2019 Reserve Capacity Information Pack
359.34 KB -
20/06/2019
2019 Supplementary forecast data
318.55 KB -
14/06/2019
RBP - 2019 reliability assessment for the SWIS
1.1 MB -
14/06/2019
ACIL Allen - 2019 peak demand and energy forecasts for the SWIS
1.71 MB
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2018
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15/06/2018
2018 WEM ESOO Report
2.63 MB -
15/06/2018
2018 ESOO Data Register - Figures
1.86 MB -
15/06/2018
2018 ESOO Data Register - Tables
347.28 KB -
15/06/2018
2018 Reserve Capacity Information Pack
209.34 KB -
15/06/2018
2018 WEM ESOO methodology report - Peak demand and energy forecasts for the SWIS
3.14 MB -
15/06/2018
2018 WEM ESOO methodology report - Assessment of system reliability for the SWIS
960.79 KB -
14/06/2018
2018 WEM ESOO Infographic
176.95 KB
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2017
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15/06/2017
2017 Electricity Statement of Opportunities for the WEM
6.6 MB -
15/06/2017
2017 WEM ESOO Data Register
6.91 MB -
15/06/2017
2017 WEM ESOO Media Release
91.43 KB -
15/06/2017
2017 WEM ESOO Infographic
318.14 KB -
15/06/2017
2017 WEM ESOO Methodology Report: Projections of Uptake of Small-scale Systems
1.42 MB -
15/06/2017
2017 WEM ESOO Methodology Report: Assessment of System Reliability (Expected Unserved Energy) and Development of the Availability Curve for the South West interconnected system
1.67 MB -
15/06/2017
2017 WEM ESOO Methodology Report: Peak Demand and Energy Forecasts for the South West interconnected system
2.38 MB
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2016
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2015
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21/07/2016
Deferred 2015 Electricity Statement of Opportunities for the WEM
6.43 MB -
21/07/2016
Deferred 2015 WEM ESOO Data Register
6.4 MB -
21/07/2016
Deferred 2015 ESOO Stakeholder Briefing
488.36 KB -
21/07/2016
Deferred 2015 WEM Electricity Statement of Opportunities Media release_FINAL
471.06 KB -
21/07/2016
Deferred 2015 WEM ESOO Infographic
831.69 KB -
21/07/2016
Deferred 2015 Reserve Capacity Information Pack
370.79 KB
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2014
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07/07/2016
2014 Electricity Statement of Opportunities
1.66 MB -
07/07/2016
2014 Reserve Capacity Information Pack
176.22 KB -
27/07/2016
2014 ESOO stakeholder workshop - presentation
1.07 MB -
07/07/2016
2014 ESOO Data Register
5.15 MB -
27/07/2016
2014 Swis Electricity Demand Outlook
4.58 MB -
27/07/2016
2014 Sedo External Presentation 2 July
699.75 KB -
27/07/2016
2014 Sedo Data Register
5.27 MB
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2013
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2012
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2011
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2010
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2009
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2008
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2007
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2006
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2005