Intelligent substation fault diagnosis method based on probability weighting bipartite graph method

Abstract

The invention discloses an intelligent substation fault diagnosis method based on a probability weighting bipartite graph method. The method comprises the steps that intelligent substation symptom information is obtained, and interrogation information is obtained according to practical needs of fault analysis; all the information obtained in the first step is subjected to priority classifying, the symptom information and the interrogation information are subjected to probability assignment, and a probability weighting bipartite cause-and-effect graph of a practical system is obtained; and according to the probability weighting bipartite graph obtained in the second step, a fault locating algorithm based on the Bayes formula is used for computing the probability of each fault which may happen, final fault locating is carried out, a fault element is determined, and diagnosis results are output. According to the method, the fault of a primary system of an intelligent substation can be diagnosed, meanwhile the fault of a secondary system can be diagnosed, a diagnosis process is deliberate and reliable, the diagnosis results are accurate, and the great novel fault diagnosis method is provided for intelligent substation secondary system fault diagnosis.

Description

technical field [0001] The invention relates to an intelligent substation fault diagnosis method based on a probability weighted bipartite graph method. Background technique [0002] In the traditional substation, because the secondary system is hard-wired, there is a corresponding logical real circuit, and there is a one-to-one correspondence between the physical wiring and the functional configuration of the substation. Therefore, by detecting the wiring of the secondary system, the fault of the secondary system of the substation can be analyzed and determined. But with the development of technology, smart substation has become the trend of future substation development with its unique advantages. The secondary system of the smart substation turns the hard wiring into a communication network, that is, the real circuit becomes a virtual circuit, and the sampling information, control information, blocking information, status information and relay protection tripping and clos...

AI Technical Summary

Problems solved by technology

This kind of diagnosis is very incomplete, which is not conducive to the rapid removal of faults and recovery from power outages.

At the same time, for smart substations, due to the networking of their secondary systems, the fault diagnosis model of traditional substations is even more inapplicable to the fault diagnosis of their secondary systems. Research on system symptom information for primary system and secondary system fault diagnosis is still relatively scarce

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