Flexibility Service Procurement

Find out where we are procuring Flexibility Services and how to get involved.

Find out more

Sign up for future tenders on our Dynamic Purchasing System (Delta eSourcing) below.

Register & Pre-Qualify 

Locations and requirements are published one month before tender. You can view these on our Flexible Power Map. 

Flexible Power Map

Documentation on the services we procure, how they are operated and our regulatory reports can be found in our document library. 

Document Library 

Our monthly KPI dashboard can be viewed here.

Dashboard

Please email if you have a question about Flexibility Services.

Contact Us 

SSEN procure Flexibility Services from owners, operators or aggregators of Distributed Energy Resources (DERs), which can be generators, storage or demand assets. These services are needed in areas of the network which have capacity constraints at particular times or under certain circumstances. These areas are known as Constraint Managed Zones (CMZs).

With the rollout of low carbon technologies and the need to make the most of available network capacity, Distribution Network Operators (DNOs) like SSEN are preparing for significant growth in the use of Flexibility Services to help manage the network in a cost-effective way.

We have plans to increase the use of Flexibility Services to help avoid potential overload conditions. DER owners, operators or aggregators able to offer more than 50kW of flexible capacity may be able to provide Flexibility Services and benefit from availability and utilisation payments.

Standard Services

SSEN procure four active power services named Sustain, Secure, Dynamic and Restore. The scenarios and parameters used are aligned with Open Networks definitions.

Service 

Description 

Use Cases

Payments

Sustain 

The provider agrees in advance their availability to deliver a change in export or import (or apply a setpoint), at specified times.

Network forecasts indicate risk of the network going beyond capacity in normal conditions. Utilisation or Fixed Income
Secure

The provider agrees in advance their availability to deliver a change in export or import at specified times.

Based on forecasts closer to the event, SSEN may or may not instruct the change.

Network forecasts indicate risk of the network going beyond capacity in N-1 fault conditions (i.e. where resilience is compromised)

OR

Planned works which would normally involve either a power outage or the use of mobile diesel generation.
Availability and Utilisation
Dynamic 

The provider agrees in advance their availability to deliver a change in export or import at specified times.

Depending on network conditions close to or during the service window, SSEN may or may not instruct the change.

Network forecasts indicate risk of the network going beyond capacity in N-2 fault conditions. (i.e. situations where power outages are likely).

OR

Planned works where there is a risk of a power outage that needs to be mitigated.
Availability and Utilisation
Restore SSEN instructs a provider in real-time to either remain off supply, reconnect with lower demand, or to reconnect generation to support faster restoration. Supply restoration following unplanned power outages. Utilisation

Flexible Power

We are a member of the Flexible Power collaboration, a group of 5 DNOs working together to deliver a toolkit for operating Flexibility Services in a standardised and scalable manner. Please visit the Flexible Power website for more information.

Distribution System Operator (DSO)

To meet the challenges of using flexibility in the operation of a safe, reliable and cost-efficient network, SSEN need to develop new capabilities, systems and skills, which are collectively known as Distribution System Operator. Find out more about our DSO action plan here.