Controller to enable the enhanced frequency response services from a multi-electrical energy storage system

Francisco Sanchez, Joshua Cayenne, Francisco González-Longatt, José Luis Rueda

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)
127 Downloads (Pure)


The increased adoption of renewable energy generation is reducing the inertial response of the Great Britain (GB) power system, which translates into larger frequency variations in both transient and pseudo-steady-state operation. To help mitigate this, National Grid, the transmission system operator in GB, has designed a control scheme called enhanced frequency response (EFR) specifically aimed at energy storage systems (ESSs). This study proposes a control system that enables the provision of EFR services from a multi-electrical ESS and at the same time allows the management of the state of charge (SOC) of each ESS. The proposed control system uses a Fuzzy Logic Controller to maintain the SOC as near as possible to the desired SOC of each ESS while providing EFR. The performance of the proposed controller is validated in transient and steadystate domains. Simulation results highlight the benefits of managing the SOC of the energy storage assets with the proposed controller. These benefits include a reduced rate of change of frequency and frequency nadir following a loss of generation as well as an increase in the service performance measure which renders into increased economic benefits for the service provider.

Original languageEnglish
Pages (from-to)258-265
Number of pages8
JournalIET Generation, Transmission and Distribution
Issue number2
Publication statusPublished - 2019


  • power grids
  • fuzzy control
  • renewable energy sources
  • frequency response
  • energy storage
  • power transmission control
  • inertial response
  • Great Britain power system
  • GB
  • pseudosteady-state operation
  • transmission system operator
  • control system
  • EFR services
  • multielectrical ESS
  • Fuzzy Logic Controller
  • steady-state domains
  • energy storage assets
  • frequency nadir
  • service performance measure
  • service provider
  • enhanced frequency response services
  • multielectrical energy storage system
  • renewable energy generation
  • frequency variations
  • SOC
  • state of charge
  • transient domains

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