Rapid screening method for abnormal operating conditions of electrical equipment

Abstract

The invention provides a method for quickly discriminating an abnormal operating condition of electrical equipment. The method specifically comprises the steps of firstly removing a switching quantity record during an equipment maintenance period from a switching quantity record of the operating equipment; calculating the operating time and probability distribution of the equipment; then regarding the switching quantity record beyond 1.96 times of a mean square error to be a switching quantity record of the abnormal operating condition by taking an average value or the maximum frequency value as a center according to whether the probability density distribution is bilaterally symmetrical or not; and finally calculating a mean square error of the probability distribution after the abnormal operating condition record is removed, wherein if the mean square error is less than a threshold delta0, the equipment is unstable in operation, and maintenance needs to be carried out on the equipment timely, and if the mean square error is greater than the threshold delta0, the equipment is stable in operation, and no inspection and maintenance needs to be carried out on the equipment. The method provided by the invention can separate the switching quantity record at an abnormal operating state from the switching quantity record, and provides a reliable scheme for state evaluation and state maintenance of the operating equipment.

Description

technical field [0001] The invention relates to the technical field of electrical equipment, in particular to a method for quickly identifying abnormal operating conditions of electrical equipment. Background technique [0002] The running equipment is normally in the standby state, usually can be started at any time and can record the time and the "on" state at this time by sending out the switch value, or stop at any time and record the time and this time by sending out the switch value when the device is in the "off" state. [0003] These records containing the "on" or "off" state of the device, the corresponding time, and the description of the corresponding device are the switch value records described in the present invention. In the project, the duration of equipment operation can be obtained by calculating the interval time difference between the two state records in the switch volume record, and the startup frequency of the equipment can be known through the number...

AI Technical Summary

Problems solved by technology

[0004] However, due to the large number of switch records and the lack of a technical method to directly separate the abnormal operation records from the switch records, it is impossible to extract the key information reflecting the abnormal operation status of the equipment from the switch records, which makes the corresponding condition maintenance difficult.

[0005] In addition, if only the traditional maximum, minimum, average value and other indicators are used to analyze the switch value records, only the overall operating parameters of the equipment can be obtained

What can not be ignored is that if there are many abnormal operation records in the switch value records, it is often possible to draw wrong conclusions by analyzing the average value and other indicators.

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