Demand Response

ENGIE can offer you an integrated approach to energy consumption control, which allows you to maximise your cost savings through responding to peak demand periods, making energy consumption behavioural changes and utilising on-site generation for increased profitability and control. The service can include: Frequency Response, Load Management, Triad Management and Short Term Operating Reserve (STOR).

Short Term Operating Reserve (STOR)

STOR is a demand-side service used by National Grid to help it keep supply and demand on the electricity network in balance at all times. If there is a sudden surge in demand, or a fall in generation output, National Grid needs to call on businesses (demand-side participants) to either start generating or to shutdown parts of their plant to bring network supply and demand back into balance.

Frequency Control by Demand Management (FCDM)

FCDM is a rapid-response service used by National Grid to help it maintain system frequency between 49.5Hz and 50.5Hz. FCDM providers automatically respond to system frequency issues to help restore the system frequency to within the acceptable range, by shutting down part of their processes to reduce demand on the network.

TRIAD Management

The Triad periods are the three half-hours in each winter season (November to February) that have the highest demand peaks on the electricity network. The peaks tend to be in the half hour between 5pm and 5.30pm.The TNUoS (Transmission Network Use of System) charges that appear on business electricity bills each year are based on your average electricity consumption during the three Triads. The only way you can reduce these annual charges is by reducing your energy consumption during the Triad periods.

To help you do this, ENGIE provides a very effective Triad warning service. Each day we send you a notification stating whether or not we think a Triad may occur later that day. If the notification is positive, we will specify two or three half-hours, typically around 5:30pm, within which the Triad is likely to fall. This should give you enough notice to minimise your consumption during those times, wherever possible. We aim to send out no more than 25 Triad warnings each season, and we have a very high success rate of predicting the Triads.

To help you monitor your success in reducing consumption during the predicted Triads, we also offer a next-day reporting service. We email these reports to you, showing your actual consumption for every half hour of the previous day and highlighting consumption during the hours of the expected Triad. This enables you to see very clearly how successful you were at reducing demand in response to the Triad warning. By accessing such instant information on consumption, you have the opportunity to refine and improve your load-management activities over the course of the Triad season – and thereby reduce your TNUoS charges for the year.

Demand Response Webinar
Frequency Control by Demand Management (FCDM)
Short Term Operating Reserve (STOR)