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Method and system for detecting fault of rotating diode of brushless exciter

A rotating diode and fault detection technology, which is applied in the direction of measuring electricity, measuring devices, fuse testing, etc., can solve problems such as inability to realize online detection, achieve the effect of solving inability to achieve online detection, accurate and reliable judgment results, and ensuring safe and stable operation

Active Publication Date: 2018-09-28
中广核工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of using the stroboscope observation method cannot realize online detection, and requires personnel to conduct regular visual inspections, which has great limitations in application

Method used

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  • Method and system for detecting fault of rotating diode of brushless exciter
  • Method and system for detecting fault of rotating diode of brushless exciter
  • Method and system for detecting fault of rotating diode of brushless exciter

Examples

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Effect test

Embodiment 1

[0041] The embodiment of the present invention provides a brushless exciter rotating diode fault detection method, see figure 2 , the method can include:

[0042] Step S11, from the preset shooting position, obtain the fusing image of the fuse including the pop-up end of the fault status indicator, the fuse is connected in series with the rotating diode of the brushless exciter, and the fault status indicator is inserted into the installation hole on one end of the fuse , and the fusing state of the fuse is indicated by whether the pop-up end pops out of the mounting hole.

[0043] In this embodiment, a fuse refers to an electrical appliance that fuses the fuse with the heat generated by itself and disconnects the circuit when the current exceeds a specified value. In the brushless exciter, the fuse is connected in series with the rotating diode to form a rectifier, which also rotates at high speed with the rotating shaft just like the rotating diode. see image 3, There i...

Embodiment 2

[0066] An embodiment of the present invention provides a brushless exciter rotating diode fault detection system, which implements the method described in Embodiment 1, see Figure 6 , the system may include: an acquisition module 100 , an identification module 200 , a calculation module 300 , and a judgment module 400 .

[0067] The acquiring module 100 is used to acquire the fusing image of the fuse containing the pop-up end of the fault state indicator from the preset shooting position, the fuse is connected in series with the rotating diode of the brushless exciter, and the fault state indicator is inserted into the end face of the fuse In the installation hole, and whether the pop-up end pops out of the installation hole indicates the fusing state of the fuse.

[0068] In this embodiment, a fuse refers to an electrical appliance that fuses the fuse with the heat generated by itself and disconnects the circuit when the current exceeds a specified value. In the brushless e...

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PUM

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Abstract

The invention discloses a method and a system for detecting a fault of a rotating diode of a brushless exciter. The method includes steps of: obtaining, from a preset shooting position, a fuse blown image including a pop-up end of a fault state indicator, and identifying a reference graph and a state graph from the obtained fuse blown image; respectively calculating the center position of the reference graph and the center position of the state graph by using a preset algorithm; and determining whether a fuse is blown by comparing whether the distance between the center of the state graph andthe center of the reference graph exceeds a preset threshold. The method for detecting the fault of the rotating diode of the brushless exciter based on image recognition analyzes and monitors the fuse image of the fuse and can effectively determine whether the rotating diode is faulty, the judgment result is accurate and reliable, and the problem that the stroboscope observation method cannot achieve online detection is effectively solved. The method and the system are of great significance for ensuring the safe and stable operation of the brushless excitation generator set.

Description

technical field [0001] The invention relates to the technical field of excitation systems of power plants, in particular to a method and system for detecting a rotating diode fault of a brushless exciter. Background technique [0002] The brushless exciter uses a diode to rectify the AC output from the exciter into DC for the excitation of the generator rotor. Such as figure 1 As shown, the stator winding of a typical three-phase brushless exciter is powered by a static excitation device. The armature winding rotates with the shaft to generate alternating current. The diode rectifier installed on the shaft converts the alternating current into direct current, which is supplied to the generator rotor through the conductive rod inside the rotor. . The brushless exciter rectifier consists of multiple diodes and protective fuses, and only a certain number of fuses are allowed to be blown out during operation. Too many open circuits of branch circuits will cause excessive curr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/265G01R31/27G01R31/07G01R31/74
CPCG01R31/2601G01R31/2656G01R31/27G01R31/74
Inventor 王忠伟魏林孙景志
Owner 中广核工程有限公司