Fault Diagnosis for Substation with Redundant Protection Configuration Based on Time-Sequence Fuzzy Petri-Net
Abstract: 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 protected 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, timing constraint is checked, and initial-information
credibility is corrected using the relationship between acted protection and
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.
Keywords: 750kV substation,
redundant protection, fault diagnosis, redundant knowledge representation, time
sequence fuzzy Petri Net
Author: Haiying Dong, Xiaonan
Li
Journal Code: jptkomputergg130043
