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Fault Diagnosis for Substation with Redundant Protection Configuration Based on Time Sequence Fuzzy Petri Net

Author(s): Xiaonan Li | Haiying Dong

ISSN 1693-6930

Volume: 11;
Issue: 2;
Start page: 231;
Date: 2013;
Original page

Keywords: 750kV substation | redundant protection | fault diagnosis | redundant knowledge representation | time sequence fuzzy Petri Net

Due to timing inconsistency, dual protection configuration and uncertainty diagnosis result characteristics of 750kV substation, fault diagnosis method of substation with redundant protection configuration which based on time sequence fuzzy Petri nets is proposed. In this method, redundant knowledge about fault component is represented by using two sets of protective information. On that basis, component redundant diagnosis-model based on time sequence fuzzy Petri net is constructed, which can be decomposed into main and redundant subnet-model. In this model, initial-information credibility is determined using information-entropy, and timing constraint is checked, initial-information credibility is corrected using the relationship between acted protection and acted breaker. Compared with fuzzy Petri net diagnosis method take no account of timing constraint, this method can not only identify the malfunction information, but also obtain a certain result.
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