Conflict of Interests Between SPC-Based BESS and UFLS Scheme Frequency Responses

Mojtaba Eliassi, Roozbeh Torkzadeh, Peyman Mazidi, Pedro Rodriguez, Ricardo Pastor, Vasiliki Vita, Elias Zafiropoulos, Christos Dikeakos, Michalis Michael, Rogiros Tapakis, George Boultadakis

Research output: Chapter in Book/Report/Conference proceedingChapterProfessional

5 Citations (Scopus)


Nowadays the interest in grid-supporting energy storage systems for frequency response improvement is spurred to increase the penetration of renewable energy resources. Operational frequency constraints of the grid code should be fulfilled in the combined state feedback frequency control provided through the BESS frequency support and UFLS relays. In this paper, favoritism and unfairness of the grid-interactive Battery Energy Storage System (BESS) frequency support is investigated in terms of Rate of Change of Frequency (RoCoF), frequency nadir, time response, steady-state error, and specifically, total load shed subject to power balance over the network. Categorizing load shedding stages into vital and non-vital can measure the appropriateness of the BESS response. Conflicts of the BESS control parameters, performance measures and UFLS actions are verified on the modified Cypriot transmission grid, and the simulation results show that a controller or modulation technique would be essential to coordinate the BESS and UFLS scheme frequency responses to handle conflict of controllers.
Original languageEnglish
Title of host publicationFlexitranstore
Subtitle of host publicationSpecial Session in the 21st International Symposium on High Voltage Engineering (ISH 2019)
EditorsBálint Németh, Lambros Ekonomou
Place of PublicationCham
Number of pages12
ISBN (Electronic)978-3-030-37818-9
ISBN (Print)978-3-030-37817-2
Publication statusPublished - 15 Jan 2020
Externally publishedYes
Event21st International Symposium on High Voltage Engineering (ISH 2019) - Budapest, Hungary
Duration: 26 Aug 201930 Aug 2019
Conference number: 21

Publication series

NameLecture Notes in Electrical Engineering (LNEE)
ISSN (Print)1876-1100
ISSN (Electronic)1876-1119


Conference21st International Symposium on High Voltage Engineering (ISH 2019)
Abbreviated titleISH 2019


  • battery energy storage system
  • Under Frequency Load Shedding
  • Dynamic frequency response
  • Performance measures
  • Battery Energy Storage System


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