Today, modern electricity systems are evolving towards a generation mix that is more reliant on wind and solar to meet environmental targets.
While renewable energy sources support these targets they also tend to be decentralised, less predictable and less flexible, while some are not available (solar PV) to meet the winter peak demand.
This increases the requirement for demand side balancing services, known as Demand Side Response (DSR).
These services help the system operator, National Grid, to balance supply and demand at times of system stress, vital to maintaining the UK’s power supplies.
A feasibility study would be conducted using your half hourly data and would then be presented to yourselves showing cost returns and benefits.
How battery storage or Energy Storage System (ESS) generates revenue
The ESS will identify when it is commercially attractive to charge/discharge. This includes limiting the discharge, as to avoid exporting to the grid, whilst maintaining the batteries high level of efficiency.
Furthermore, since some losses are present when both charging and discharging, the model will avoid over charging/discharging past the state of charge required to maintain the grid constraints imposed.
Triad Management
Every year the Transmission System Operators (TSO) can recover a maximum revenue for the maintenance of the system from its network users. This is known as the Transmission Use of Network Service (TNUoS) and is comprised of ‘forward looking’ charges and residual charges to ensure the total revenue is recovered.
The Triad charging structure is part of the ‘forward looking’ TNUoS charge and is levied by taking a user’s average power usage across the three half hours of highest demand on the transmission system (triad periods). The triad periods are measured between November and February whilst remaining at least 10 days apart. With a triad warning system in place, a user can reliably reduce their usage and thus their TNUoS charge. The current average triad charge rate is £45/kW.