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

Market engagement 2020

- Frequency Response Products Market Information Reports can be found here

EBGL Article 18 Dynamic Containment consultation documents (Dec 20) can be found here (17/12/20)



- Podcast on Dynamic Containment. You can listen to it here (26/6/20)

- Service Terms video (the PowerPoint version can be accessed below in the document library) (4/9/20)



- Webinar recording of the soft launch webinar on 18 August can be found here (21/8/20)

- Procurement rules and process webinar and slides (4/9/20)

- Onboarding webinar and slides (4/9/20)

- Testing webinar and testing guidance (4/9/20)

- Mock tender review webinar can be watched here (28/9/20)



EBGL Article 18 Dynamic Containment consultation (Aug 20) can be found here (21/8/20). Following the consultation, Ofgem have approved the final Terms and Conditions and associated contractual documents. Alongside the Article 18 submission, NGESO also submitted an EBGL Article 26 document and a derogation related to Clean Energy Package Article 6(2), which were both approved. Here is the link to the letter we submitted to Ofgem following the end of the EBGL consultation which includes the consultation responses from providers.

- EBGL Article 26 Dynamic Containment consultation (Oct 20) on the use of Dynamic Containment as a specific product. In the previous consultation, Ofgem approved the proposal we submitted on this but it was on the condition that we held a full consultation in October. The consultation was open until 30 November. Further information can be found here.