Switchgear spring operating mechanism device fault diagnosis method and device

Abstract

The invention provides a switchgear spring operating mechanism device fault diagnosis method and device. The fault diagnosis method includes the following steps that: switching-off and switching-on coil current signals and core stroke signals during the switching-off and switching-on operation process of an operating mechanism are detected; analysis processing is performed on the obtained switching-off and switching-on coil current signals and core stroke signals, so that relevant characteristic data are obtained; the obtained characteristic data are compared with a data model library, so thatwhether the operating mechanism is faulty and the fault type of the operating mechanism can be known through diagnosis, wherein the data model library includes a normal state data model and an abnormal state data model which respectively include the characteristic data of the operating mechanism under a normal state and an abnormal state which are corresponding to the switching-off and switching-on coil current signals and the core stroke signals. With the switchgear spring operating mechanism device fault diagnosis method and device of the invention adopted, the problem of low accuracy of adetermined result which is caucused a condition that only switching-off and switching-on coil current signals are adopted to determine the fault type of the operating mechanism of a switchgear in theprior art can be solved.

Description

technical field [0001] The invention belongs to the technical field of switchgear control, and in particular relates to a fault diagnosis method and device for a spring operating mechanism of a switchgear. Background technique [0002] The rejection, refusal and malfunction of high-voltage switchgear will bring huge losses to the power system. According to the survey, the failure of the operating mechanism is the main reason for the abnormality of the high-voltage switchgear. Therefore, improving the reliability of the operating mechanism is crucial to ensuring the high-voltage The reliable operation of switchgear is of great significance. [0003] At present, most of the research on the operating state monitoring and fault diagnosis of the spring operating mechanism is limited to the theoretical analysis level. Only a few have realized the monitoring of the change of the induced current in the electromagnet during the movement of the spring mechanism, but no comparative Re...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method and device for fault diagnosis of the switchgear spring operating mechanism, which is used to solve the problem of determining the fault type of the switchgear operating mechanism in the prior art because only the signal of the opening and closing coil current is used to determine the fault type. The problem of low accuracy of results

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