대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 1989년도 하계종합학술대회 논문집
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- Pages.241-245
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- 1989
전력계통의 고장진단을 위한 전문가 시스템의 연구
An Expert System for Foult Diagnosis in a System
- Park, Young-Moon (Dept. of E.E., Seoul National University) ;
- Lee, Heung-Jae (Dept. of E.E., Seoul National University)
- 발행 : 1989.07.21
초록
A knowledge based expert system is a computer program that emulates the reasoning process of a human expert in a specific problem domain. This paper presents an expert system to diagnose the various faults in power system. The developed expert system is represented considering two points; the possibility of solution and the fast processing speed. As uncertainties exist in the facts and rules which comprise the knowledge base of the expert system, Certainty Factor, which is based on the confirmation theory is used for the inexact reasoning. Also, as the diagnosis problem requires the inductive reasoning process in nature, the solution is imperfect and not unique in general. So the expert system is designed to generate all the possible hypothesis in order of the possibility and also it can explain the propagation procedure of the faults for each solution using the built in backtracking mechanism. In realization of the expert system, the processing speed is greatly dependent upon the problem representation, reasoning scheme and search strategy. So, in this paper the fault diagnosis problem itself is analysed from the view point of Artificial Intelligence and as a result, the expert system has the following basic features. 1) The certainty factor is adopted in the inference engine for inexact reasoning. 2) Problem apace is represented using the problem reduction technique. 3) Bidirectional reasoning scheme is used. 4) Best first search strategy is adopted for rapid processing. The expert system was developed us ing PROLOG language.
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