Short-circuit prediction method for electrical circuit

Abstract

The invention discloses a short-circuit prediction method for an electrical circuit, and the method comprises the following steps: A, monitoring a current value S of a line L of the electrical circuitin real time through a current sensor and a controller, wherein the monitoring frequency is 3000 times per second; B, calculating the derivative V and second-order derivative a of a current change value per microsecond through the controller; C, comparing the current value S with a preset maximum current value I through the controller: determining that the electrical circuit has a short-circuit fault if S>=I, V>=30A / micron and a>=5A / micron / micron; D, switching off a relay through the controller is the electrical circuit is determined to have the short-circuit fault, and carrying out the powerfailure protection. The method provided by the invention can timely predict the short-circuit condition and achieve the power failure protection through the real-time monitoring of the current condition of the line L of the electrical circuit, can effectively avoid an electrical disaster, and guarantees the property and life safety of the people.

Description

technical field [0001] The invention relates to a method for monitoring electricity safety, in particular to a method for predicting a short circuit of an electric circuit. Background technique [0002] Short circuit is one of the main causes of electrical fires, often causing huge property losses and personal injuries. However, existing electrical control devices, such as air switches, thermal relay protection switches, etc., are all passive measures taken when a short circuit has occurred. Although they can play a protective role to a certain extent, they cannot fundamentally eliminate the short circuit. This is evidenced by the continuous occurrence of electrical safety accidents, so timely and effective prediction, prevention and control of them is particularly necessary. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for predicting short circuit of electric circuit, which can predict the occurrenc...

AI Technical Summary

Problems solved by technology

However, existing electrical control devices, such as air switches, thermal relay protection switches, etc., are all passive measures taken when a short circuit has occurred. Although they can play a protective role to a certain extent, they cannot fundamentally eliminate the short circuit. This is evidenced by the continuous occurrence of electrical safety accidents, so it is especially necessary to timely and effectively predict and prevent them

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