Short-circuit prediction method for electrical circuit

A prediction method and line short-circuit technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problem that short-circuits cannot be fundamentally eliminated, and achieve the effect of avoiding electrical disasters and ensuring property and life safety.

Active Publication Date: 2018-04-06
SICHUAN ELECTRIC SHIELD SAFETY TECH LTD
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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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  • Short-circuit prediction method for electrical circuit

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Embodiment Construction

[0014] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0015] Any feature disclosed in this specification, unless specifically stated, can be replaced by other alternative features that are equivalent or have similar purposes. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0016] Such as figure 1 As shown, a method for predicting a short circuit in an electrical circuit of the present invention comprises the following steps: A. Real-time monitoring of the current value S on the L line of the electrical circuit through a current sensor and a controller, and the monitoring frequency is 3000 times per second; B. Through the controller Calculate the derivative V and the second derivative a of the current change value per microsecond; C, compare the current value S and the ...

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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...

Claims

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Application Information

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IPC IPC(8): G01R31/02
CPCG01R31/50
Inventor 段守富喻元卿王跃胜冯成斌唐平唐俨罗雅兮张瑞
Owner SICHUAN ELECTRIC SHIELD SAFETY TECH LTD
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