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A short circuit detection method and device

A short-circuit detection and circuit technology, applied in the field of circuits, can solve the problems of long detection time, narrow application range and high implementation complexity

Active Publication Date: 2016-01-06
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is either complex to implement, takes a long time to detect, or has a narrow scope of application

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  • A short circuit detection method and device
  • A short circuit detection method and device
  • A short circuit detection method and device

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Embodiment Construction

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0048] In addition to considering the conditions that the instantaneous current value and the first-order derivative value of the current should satisfy, the present invention also considers the constraint relationship between the instantaneous current value and its derivatives, and judges whether a Instead of judging the conditions that each parameter should meet in isolation, it is more reliable than the existing detection methods.

[0049] For example, figure 1 A flow chart of a short circuit detection method provided for an embodiment mainly includes:

[0050] Step 101, obtaining the instantaneous current value of the circuit and / or current derivative values ​​of M different orders corresponding to the ins...

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Abstract

The invention discloses a method and a device for short circuit detection. The method includes: obtaining an instant current value and / or M different-order current derivative values corresponding to the instant current value, wherein M is an integer larger than or equal to 1; choosing at least two values from the current value or the M current derivative values, and judging whether the two chosen values meet a preset restrain relationship between the at least two values; and confirming that the circuit is short out if the preset restrain relationship is met.

Description

technical field [0001] The invention relates to the field of circuit technology, in particular to a short circuit detection method. Background technique [0002] In electronic networks, circuit breakers are usually used to protect circuits from short circuits. In a circuit breaker, the short circuit current can damage the circuit breaker, such as the mechanical contacts in the circuit breaker. If the short-circuit current is detected at an early stage, the circuit breaker can be tripped before the current reaches a large level, thereby reducing damage to the circuit breaker and increasing the safety and service life of the circuit breaker. [0003] At present, the existing short-circuit detection technology generally measures the current and its first-order derivative, and respectively judges whether the current and its first-order derivative meet the constraints that should be satisfied when a short-circuit occurs, so as to determine whether a short-circuit occurs. Howeve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/02
Inventor 杜峰马里奥·丹克特陈维刚闵应宗卓越
Owner SIEMENS AG