Last updated: 09 Oct 2025
Frequency keeping
Frequency keeping services are required to manage short term supply and demand imbalances to ensure that the system frequency is maintained at or near 50 Hz.
Last updated: 09 Oct 2025
Frequency keeping services are required to manage short term supply and demand imbalances to ensure that the system frequency is maintained at or near 50 Hz.
Last updated: 04 Aug 2025
Last updated: 09 Oct 2025
We procure ancillary services to support the reliable operation of the power system & assist us to meet our Principal Performance Obligations specified in the Electricity Industry Participation Code.
Last updated: 12 Sep 2022
Last updated: 26 Mar 2025
The Policy Statement set out how the System Operator will meet its code obligations
Last updated: 13 Sep 2022
Last updated: 12 Dec 2023
Last updated: 13 Sep 2022
Last updated: 25 Sep 2025
Last updated: 16 May 2025