Every three years, the ERA reviews the method used to certify capacity for intermittent generators, such as wind and solar farms. As these generators have less control over their output, the capacity certification method acknowledges this variability.
The ERA completed its review on 31 March 2019.
Values for the parameters K and U
The ERA has recommended changing the current relevant level method and intends to develop a rule change proposal. While any proposed rule change is in development, the current relevant level method will continue to apply. In accordance with clause 4.11.3C of the Market Rules the ERA has determined the following values for the parameters K and U in step 17 of the current relevant level method. After the approval and implementation of the proposed rule change these parameters will no longer apply.
| Reserve capacity cycle |
Capacity year |
K value |
U value |
| 2019 |
2021/22 |
0.000 |
0.635 |
| 2020 |
2022/23 |
0.000 |
0.635 |
| 2021 |
2023/24 |
0.000 |
0.635 |
ERA papers
The ERA published a draft report on 21 December 2018 to seek feedback from market participants and interested parties on the Relevant Level Methodology. The consultation period closed on Monday, 18 February 2019. The ERA published a final report on 31 March 2019.
Public submissions
We received eight submissions in response to our draft report. These submissions are available in the table below.
Progress updates
The ERA Secretariat has established a working group to assist with the review. Regular status updates will be made public here as well as any presentations to the working group or to the Market Advisory Committee. These documents are working notes only and do not represent the official views of the ERA.
