Online monitoring method and system for gate integrated protection function of mos tube

Abstract

The application discloses an online monitoring method and system for MOS tube gate integrated protection function, and relates to the technical field of power semiconductor device fault diagnosis and health management. The method comprises the following steps: when the MOS tube is turned off, a safety test pulse is applied to obtain response data; a characteristic vector is extracted to search in a benchmark library, and K candidate modes are locked; initial depth verification is carried out based on the candidate set, and P first depth modes are obtained; space disturbance is triggered based on the association of the fault unit, and Q first breadth modes are obtained; depth adaptive verification is carried out on the combined and expanded set, and H second depth modes are obtained; breadth-depth search is iterated until the matching degree converges, and a fault mode is output and an alarm is given. The technical problems that the MOS tube gate integrated protection structure cannot be monitored online and accurately identified in the prior art are solved, and the technical effects of accurate convergence of the fault mode through breadth-depth iterative search, improvement of online monitoring accuracy and timeliness of early warning are achieved.

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