Agent-based self-healing protection system

Su Sheng, K. K. Li, Wai Lok Chan, Zeng Xiangjun, Duan Xianzhong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

89 Citations (Scopus)


This paper proposes an agent-based paradigm for self-healing protection systems. Numerical relays implemented with intelligent electronic devices are designed as a relay agent to perform a protective relaying function in cooperation with other relay agents. A graph-theory-based expert system, which can be integrated with supervisory control and a data acquisition system, has been developed to divide the power grid into primary and backup protection zones online and all relay agents are assigned to specific zones according to system topological configuration. In order to facilitate a more robust, less vulnerable protection system, predictive and corrective self-healing strategies are implemented as guideline regulations of the relay agent, and the relay agents within the same protection zone communicate and cooperate to detect, locate, and trip fault precisely with primary and backup protection. Performance of the proposed protection system has been simulated with cascading fault, failures in communication and protection units, and compared with a coordinated directional overcurrent protection system.
Original languageEnglish
Pages (from-to)610-618
Number of pages9
JournalIEEE Transactions on Power Delivery
Issue number2
Publication statusPublished - 1 Apr 2006


  • Agent
  • Expert system
  • Protection system
  • Self-healing

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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