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Circuit and method for detecting, identifying and positioning short-circuit fault of capacitor bank through single port

A technology for identifying and locating short-circuit faults, applied in short-circuit testing, capacitor testing, etc., can solve problems such as limited detection measures for short-circuit fault status of large-capacity energy storage capacitor banks, limited resources of single-chip or FPGA, and no circuit short-circuit fault detection, etc., to achieve The effect of reducing overall cost, reducing occupancy requirements, fast fault detection and precise positioning

Active Publication Date: 2021-06-18
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limited resources of single-chip or FPGA, the short-circuit fault state detection measures of large-capacity energy storage capacitor banks are greatly limited.
[0004] Therefore, at present, there are still problems to be solved urgently for short-circuit fault detection of capacitors in large-scale applications. There is no simple and effective method for short-circuit fault detection for large-scale parallel capacitor circuits. Therefore, it is necessary to optimize and improve this, and put forward a reasonable Technical solutions to solve current technical problems

Method used

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  • Circuit and method for detecting, identifying and positioning short-circuit fault of capacitor bank through single port
  • Circuit and method for detecting, identifying and positioning short-circuit fault of capacitor bank through single port
  • Circuit and method for detecting, identifying and positioning short-circuit fault of capacitor bank through single port

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Embodiment 1

[0042] Aiming at the problem of large processor occupation in the capacitor bank short-circuit fault detection in the capacitor parallel circuit, it not only causes low detection efficiency and high cost, but also increases the tediousness of the detection work, making it difficult to determine the location of the capacitor short-circuit fault . This embodiment proposes an inspection and identification circuit for detecting capacitor parallel circuits, which can detect all capacitor short-circuit faults in capacitor parallel circuits through a single detection port, and quickly realize the identification and location of fault locations.

[0043] Specifically, such as figure 1 , figure 2 As shown, the scheme disclosed in this embodiment is as follows:

[0044] A single-port circuit for detecting and identifying and locating short-circuit faults of capacitor banks is connected to a capacitor parallel circuit powered by a DC bus, and the branch where each capacitor is located ...

Embodiment 2

[0067] The above-mentioned embodiment discloses a detection and identification circuit, and this embodiment also discloses a method for detecting a capacitor short-circuit fault using the above-mentioned detection and identification circuit, specifically as follows:

[0068] A single-port method for detecting and identifying short-circuit faults in capacitor banks, using the above-mentioned detection and identification circuit, including:

[0069] S01: Set the one-to-one correspondence between the voltage dividing branch and the capacitor branch, and configure the resistance value of each branch of the voltage dividing branch, so that the resistance value of the voltage dividing module formed when any voltage dividing branch is connected to the voltage dividing module is the only value;

[0070] S02: According to the resistance value ratio of each voltage divider module to the resistance value of the first current limiting unit, calculate the voltage value obtained by the volt...

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Abstract

The invention relates to the technical field of circuit detection, in particular to a circuit and method for detecting, identifying and positioning a short-circuit fault of a capacitor bank through a single port. A detection and identification circuit is combined with a capacitor parallel circuit, the on-off condition of each capacitor branch in the capacitor parallel circuit can be reflected by monitoring the voltage at a voltage division module in real time, and whether the capacitor in the capacitor branch has a short-circuit fault or not is further obtained by analysis. According to the invention, the capacitor branch with the short-circuit fault in the capacitor parallel circuit is reversely deduced through the detection result of the single-port voltage of the detection and identification circuit, thereby reducing the occupation demands of a single-chip microcomputer, an FPGA and other data processors, achieving the fault detection and accurate positioning more quickly, and reducing the overall cost.

Description

technical field [0001] The invention relates to the technical field of circuit detection, in particular to a circuit and method for single-port detection and identification and location of short-circuit faults of capacitor groups. Background technique [0002] Capacitors are commonly used components in circuits. Capacitors have been widely used many times in current complex circuits to meet various needs in circuits. Due to the non-conducting characteristics of capacitors, they generally undertake the functions of sharing voltage and breaking circuits in circuits. However, long-term loads or instantaneous high loads are likely to cause capacitors to be broken down and lead to circuit conduction, and short-circuit faults in capacitors will also cause circuit failure. Conduction, so the capacitor loses the function of sharing the voltage and breaking the circuit, causing a safety hazard to the circuit, or causing the problem that the circuit cannot continue to work normally. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/52G01R31/64
CPCG01R31/52G01R31/64Y04S10/52
Inventor 张斐王海龙余俊宏冯刚黄君涛卓沛黄付刚王斌
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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