A Fault Diagnosis Method of Power Grid Based on Information Fusion of Topological Elements

Abstract

The invention disclosers a power grid fault diagnosis method based on topological graphic primitive information fusion; the method comprises the following steps: building a system various-bus, line, protection and breaker topology association matrix according to a power grid topology structure, and building a power grid fault diagnosis model by using said matrix as basic graphic primitive; fusing protection and breaker motion confidence probabilities according to the protection and breaker topology mapping relation; building rules to realize remote backup protection topology mapping according to remote backup protection cooperation logics and an outlet mode; selecting the maximum value to optimize the confidence probability according to the confidence probabilities of different protection inference paths; fusing the fault probability information according to topological graphic primitive probability distribution and port directions, thus obtaining the element integral fault probability; ranking the element fault probability result so as to determine the failure element, and carrying out protection and breaker motion evaluation.

Description

technical field [0001] The invention belongs to the technical field of grid stubbornness diagnosis, and more specifically relates to a grid fault diagnosis method based on information fusion of topological graph elements. Background technique [0002] Quickly locating faulty components when a power grid fault occurs is conducive to speeding up the accident handling process and quickly restoring system power supply. While the development of the interconnected grid strengthens the reliability of the system, it also increases the difficulty of fault diagnosis. In a short period of time after a fault occurs, a large number of alarm information such as protection and circuit breakers flood into the dispatch center, accompanied by uncertainties such as information loss and distortion, which increases the pressure on control and operation personnel to quickly and accurately judge faulty components. Therefore, there is an urgent need for reliable fault diagnosis system. [0003] W...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a power grid fault diagnosis method based on the fusion of topological graph element information, based on network topology modeling, and its purpose is to solve the problem that the existing power grid fault diagnosis technology cannot adapt to network topology changes 、Technical problems with low diagnostic accuracy in cascading failure mode

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