7
1.2. FFR service
FFR product
types
The FFR service is split into two physical products, Non-Dynamic (static) and Dynamic
frequency response. There are three main Dynamic service types - primary, secondary and
high.
Response
types
Non-Dynamic frequency response is triggered at a defined frequency deviation which is
specified in the providers Framework Agreement, which must be in place before tendering. No
response is required within the operating range.
Dynamic frequency response is continuously provided and is used to manage second-by-
second frequency variations. Dynamic response is automatically delivered for all frequency
variations outside of the deadband (50Hz ±0.015Hz).
BM and Non-
BM
providers
The FFR service is open to both BM and Non-BM providers. Providers can offer other
balancing services when they are not providing FFR.
Aggregated loads, when summated, must be equal to or greater than 1MW.
There must be a single point of dispatch or a method in which the total output of the combined
loads can be monitored to demonstrate to National Grid that the service is available.
3. How to
participate
1. FFR overview
4. Assessment
principles
6. Market
information
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5. Stacked
volumes
2. Technical
requirements