Dynamic Containment

Dynamic Containment (DC) is designed to operate post-fault, i.e. for deployment after a significant frequency deviation in order to meet our most immediate need for faster-acting frequency response.

Currently, the electricity system is experiencing lower inertia and larger, more numerous losses than ever before. Faster acting frequency response products are needed because system frequency is moving away from 50Hz more rapidly as a consequence of imbalances.

Over the next few years, the ESO aims to deliver a new suite of faster-acting frequency response services to support our operations as the electricity system is decarbonised and to ensure that these new services enable a level playing field for all technologies. Dynamic Containment is the first of our new end-state services that we will be releasing to mitigate this risk.



If you have any questions regarding Dynamic Containment, in the first instance please take a look at our FAQ document (the document will appear in your downloads folder).

Alternatively, please contact the team for any queries at: [email protected] 


New providers

If you are a new provider, please review the DC Participation Guidance Document in the 'How to participate' tab, in the 'Legal documents' section for details on how to join the service. If you have any questions, please contact the team at: [email protected]


The two other services in Response Reform

Visit the Dynamic Moderation page

Visit the Dynamic Regulation page

DC service specification

Service specificationDetails
Deadband delivery0% (+/- 0.015Hz)
Small linear delivery

Between 0.015Hz and 0.2Hz (maximum of 5% at 0.2Hz)

Knee point activation+/- 0.2Hz is 5%
Full delivery+/- 0.5Hz is 100%
Linear delivery knee point0.2Hz
Full activation0.5Hz
Full delivery1s