Method and device for judging reasonable temperature rise of electric cabinet caused by current

Abstract

The invention provides a method and a device for judging reasonable temperature rise of an electric cabinet caused by current. The method comprises the following steps: S1) establishing an artificial neural network model taking current as input and temperature rise as output for each temperature monitoring point of the electric cabinet and training the artificial neural network model according to the historical data of the current and the corresponding temperature rise thereof of the electric cabinet under normal state, thereby acquiring the trained artificial neural network model; and S2) acquiring the present current and the corresponding present temperature rise of the electric cabinet, acquiring the first theoretical temperature rise when the present current is inputted to the trained artificial neural network model, performing error analysis on the present temperature rise and the first theoretical temperature rise and confirming the temperature rise of the electric cabinet as normal if the error analysis result is less than or equal to a preset error threshold value. The method provided by the invention is used for solving the technical problem that the abnormal temperature rise hidden danger under the condition of low current cannot be timely found according to the method for judging if the equipment heating is normal by judging if the measured temperature or temperature rise exceeds the preset threshold value.

Description

technical field [0001] The invention relates to the field of electrical equipment, in particular to a method and device for judging a reasonable temperature rise of an electric cabinet caused by current. Background technique [0002] The cause of switch burning accidents is often the unreasonable or increased contact resistance at the switch contacts and internal conductor component joints. When the normal working current passes, the contact resistance generates more heat, resulting in an abnormal increase in temperature. If the electric cabinet is operated under the condition of overheating of the components for a long time, the insulation will gradually age or even burn out, and then a short circuit fault or leakage will occur, which may eventually lead to a serious electrical accident or electrical fire. [0003] The existing temperature measurement system of the electric cabinet only judges whether the equipment heating is normal by judging whether the measured temperatu...

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Problems solved by technology

[0004] The invention provides a method and device for judging the reasonable temperature rise of the electric cabinet caused by current, which solves the problem that the method of judging whether the heating of the equipment is normal by judging whether the measured temperature or the temperature rise exceeds the preset threshold cannot detect the small current situation in time The technical problem of the hidden danger of abnormal temperature rise

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