Fault analysis method for surface temperature inspection of power distribution cabinet

Abstract

The invention relates to a fault analysis method for surface temperature inspection of a power distribution cabinet. The method comprises the following steps: selecting characteristic parameters for establishing a prediction model; regular and cyclic inspection and recording are carried out on each power distribution unit, and a multivariate quadratic linear regression model is established for the predicted temperature T (x) of the surface of the cabinet body at the Xth time; the maximum load rate dMAX and the sample absolute average error TMAD of the sample are calculated as judgment threshold values during temperature prediction; performing surface temperature detection on a power distribution unit of the power distribution cabinet, and recording temperature data; the data are substituted into the linear regression equation, the surface temperature predicted value T predicted value and the error delta between the actual value T actual value and the predicted value T predicted value are calculated, and delta = T actual value-T predicted value; judging the size of delta and the size of TMAD, if delta gt; and the TMAD analyzes the environment temperature of the distribution room, if the environment temperature is larger than a, temperature abnormity alarm reminding is carried out, if the environment temperature is smaller than a, the operation load rate dK of the last two times of sampling is calculated, and if dK is smaller than or equal to dMAX, abnormity alarm is carried out on electrical elements of the distribution unit.

Description

technical field [0001] The invention relates to the technical field of fault analysis methods, in particular to a fault analysis method for inspection of the surface temperature of a power distribution cabinet. Background technique [0002] Power distribution cabinets are divided into power distribution cabinets, lighting distribution cabinets, and metering cabinets. They are the final equipment of the power distribution system and are used to distribute the electrical energy of a certain circuit of the upper-level power distribution equipment to the nearest load. The power distribution cabinet provides protection, monitoring and control for the load. The power distribution cabinet is composed of a complete set of cabinet components and a power supply and distribution unit. The power supply and distribution unit includes three parts. The second is electrical components and related accessories, namely buttons, indicator lights, circuit breakers, inductors, etc. and their requ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a fault analysis method for the surface temperature inspection of the power distribution cabinet to solve the problems existing in the current inspection of the surface temperature of the power distribution cabinet

Images