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Short circuit detection method and device

A technology for short-circuit detection and equipment, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., and can solve the problem of low accuracy.

Active Publication Date: 2017-04-12
VERTIV CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Embodiments of the present invention provide a short-circuit detection method and equipment to solve the problem of low accuracy in short-circuit detection of the SCR used to isolate the mains and the battery in the prior art

Method used

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  • Short circuit detection method and device

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Experimental program
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Effect test

Embodiment 1

[0062] Such as image 3 As shown, it is the first embodiment of the present invention for the UPS battery discharge line, which is connected to the L K A schematic diagram of any thyristor between the input terminal of the phase mains and the positive pole of the positive side battery or the negative pole of the negative side battery, and the method includes the following steps:

[0063] Step 101: Detect and judge L K Whether the voltage phase angle of the phase mains is W degrees, if yes, then execute step 102, if not, then proceed to step 101, the K is 1, 2 or 3.

[0064] When the thyristor is connected at L K When between the phase electricity and the positive pole of the battery, said 50≤W≤130, said K is a positive integer greater than or equal to 1 and less than or equal to 3;

[0065] When the thyristor is connected at L K Between the phase electricity and the negative pole of the battery, the 230≤W≤310.

[0066] Because when the thyristor is short-circuited, the vo...

Embodiment 2

[0081] The thyristor to be detected in Embodiment 2 of the present invention includes a K Phase power, L (K+1)mod3 Phase power, L (K+2)mod3 The thyristor between the input terminal of the phase power and the positive pole of the positive side battery, and the thyristors connected to the L K Phase power, L (K+1)mod3 Phase power, L (K+2)mod3 The thyristor between the input terminal of the phase power and the negative pole of the negative side battery, for figure 1 Among them, the thyristor to be detected is specifically: G 13 , G 23 , G 33 , G 14 , G 24 and G 34 . Figure 4 The shown flow chart is the schematic flow chart of the short-circuit detection method for the thyristor to be detected in the uninterruptible power supply UPS battery discharge line of the second embodiment of the present invention, and the method may include the following steps:

[0082] Step 201: From the three-phase mains L 1 , L 2 , L 3 Choose one phase mains L K , the K is 1, 2 or 3, and ...

Embodiment 3

[0105]Based on the same idea as the solution of the first embodiment of the present invention, the third embodiment of the present invention provides a short-circuit detection device, and its structural diagram is as follows Figure 5 As shown, the short circuit detection device includes: a detection module 11, a first judgment module 12, a second judgment module 13 and a determination module 14, wherein:

[0106] The detection module 11 is used for any thyristor connected between the input terminal of each phase of the mains and the positive or negative pole of the battery in the uninterruptible power supply UPS battery discharge circuit, when the voltage phase angle of the phase of the mains is W degrees , respectively detect the voltage value of the battery corresponding to the thyristor and the voltage value of the mains of this phase. When the thyristor is connected to the positive pole of the positive side battery, the battery corresponding to the thyristor is the positiv...

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Abstract

The invention discloses a short-circuit detection method and equipment, the main contents of which include: when the voltage phase angle of the phase mains is W degrees, respectively detecting the voltage value of the battery corresponding to the thyristor and the voltage value of the phase mains, when When the absolute value of the difference between the detected voltage value of the battery and the voltage value of the phase mains is continuously smaller than the preset threshold setting times, it is determined that the thyristor is short-circuited. In the solution of the embodiment of the present invention, due to the utilization of the phase and amplitude relationship between the voltage of the battery and the voltage of the mains when the thyristor used to control the mains and battery isolation is short-circuited, it can be quickly compared with the prior art. Accurately detect whether the thyristor is short-circuited.

Description

technical field [0001] The present invention relates to the technical field of Uninterruptible Power Supply (UPS), in particular to a short circuit detection method and equipment. Background technique [0002] With the advancement of power electronics technology and the rapid development of the IT industry, people are increasingly aware of the important role UPS plays in protecting data. UPS has also been widely used in industries, communications, and family life. At the same time, more and more companies have put forward higher requirements for the stability of their own networks and data security. The demand for high-quality UPS has been greatly improved, which puts forward a new challenge to the quality of power supply. higher requirement. [0003] In the UPS battery discharge circuit, the thyristor (Silicon Controlled Rectifier, SCR) plays the role of isolating the mains and the battery and controlling the battery discharge. When the mains supply power, if the SCR is s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/02
Inventor 资志翔
Owner VERTIV CORP