Premium
Fault Section Estimation of Power System Using Colored and Timed Petri Nets
Author(s) -
Yang ChunLing,
Yokoyama Akmiko,
Sekine Yasuji
Publication year - 1995
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391150209
Subject(s) - petri net , circuit breaker , computer science , fault (geology) , relay , inference , protective relay , inference engine , power (physics) , real time computing , distributed computing , artificial intelligence , engineering , electrical engineering , physics , quantum mechanics , seismology , geology
A correct and rapid inference is required for practical use of expert system for fault section estimation in power systems. This paper proposes a new model‐based expert system for fault section estimation using colored and timed Petri nets. The Petri nets simplify the inference procedure greatly because it can represent the causalities among faults of power system components, protective actions of relays and circuit breakers. They can also represent the operating states of these protective devices explicitly, or, more precisely, whether a relay has been actuated correctly or falsely, etc. In addition, time sequence information on actuated relays and tripped circuit breakers can be handled by using the colored and timed Petri nets. Therefore, the operating states of relays and circuit breakers can be inferred more correctly. Petri nets are suited for parallel processing so well that there is a possibility of reducing the inference time considerably. In the proposed system, the inference is executed by setting the initial states in the Petri nets using the information on the actuated relays and the tripped circuit breakers and then operating the Petri nets. There have been several test cases which used a prototype system on the Macintosh computer employing Object Common Lisp, and good results have been obtained.