Resilient Synchronization Strategy for AC Microgrids Under Cyber Attacks

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Abstract

Although distributed control in microgrids is well known for reliability and scalability, the absence of a global monitoring entity makes it highly vulnerable to cyber attacks. Considering that the detection of cyber attacks becomes fairly easy for distributed observers, a well-planned set of balanced attacks, commonly termed as stealth attack, can always bypass these observers with the control objectives being successfully met. In this letter, a mitigation technique is thus introduced to remove stealth attack on the frequency control input in ac microgrids. The mitigation is carried out using a novel event-driven attack-resilient controller for N cooperative grid-forming converters, which guarantees resilient synchronization for up to N-1 attacked units. Finally, the resilience capabilities and robustness of the proposed controller are discussed and verified under various scenarios.

Original languageEnglish
Article number9127110
JournalI E E E Transactions on Power Electronics
Volume36
Issue number1
Pages (from-to)73-77
Number of pages5
ISSN0885-8993
DOIs
Publication statusPublished - Jan 2021

Keywords

  • AC Microgrids
  • distributed control
  • Cyber-Physical System
  • Cyber Attacks
  • Grid forming inverters

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