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Fuzzy Timing Petri Net for Fault Diagnosis in Power System

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  • Alireza Tavakholi Ghainani
  • Abdullah Asuhaimi Mohd Zin
  • Nur ‘Ain Maiza Ismail

Abstract

A model-based system for fault diagnosis in power system is presented in this paper. It is based on fuzzy timing Petri net (FTPN). The ordinary Petri net (PN) tool is used to model the protective components, relays, and circuit breakers. In addition, fuzzy timing is associated with places (token)/transition to handle the uncertain information of relays and circuits breakers. The received delay time information of relays and breakers is mapped to fuzzy timestamps, π ( τ ), as initial marking of the backward FTPN. The diagnosis process starts by marking the backward sub-FTPNs. The final marking is found by going through the firing sequence, σ , of each sub-FTPN and updating fuzzy timestamp in each state of σ . The final marking indicates the estimated fault section. This information is then in turn used in forward FTPN to evaluate the fault hypothesis. The FTPN will increase the speed of the inference engine because of the ability of Petri net to describe parallel processing, and the use of time-tag data will cause the inference procedure to be more accurate.

Suggested Citation

  • Alireza Tavakholi Ghainani & Abdullah Asuhaimi Mohd Zin & Nur ‘Ain Maiza Ismail, 2012. "Fuzzy Timing Petri Net for Fault Diagnosis in Power System," Mathematical Problems in Engineering, Hindawi, vol. 2012, pages 1-12, September.
    • Handle: RePEc:hin:jnlmpe:717195
    DOI: 10.1155/2012/717195
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