On-line monitoring system for high-voltage breaker based on vibration characteristics

A high-voltage circuit breaker and circuit breaker technology, applied in the application field, can solve the problems of low data accuracy, inconvenient disassembly, poor safety, etc., and achieve the effects of reducing the danger of installation personnel, convenient installation and maintenance, and simple method.

Inactive Publication Date: 2012-05-02
XIAN UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional on-line monitoring method of high-voltage circuit breaker mainly monitors the number of mechanical operations of the circuit breaker, the cumulative running time of the switch, the contact switching time of closing and opening coil loops, the current and voltage of closing and opening coils, the stroke of the moving contact of the circuit breaker, the circuit breaker Co

Method used

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  • On-line monitoring system for high-voltage breaker based on vibration characteristics
  • On-line monitoring system for high-voltage breaker based on vibration characteristics
  • On-line monitoring system for high-voltage breaker based on vibration characteristics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] refer to figure 1 , an online monitoring system for high-voltage circuit breakers based on vibration characteristics, including vibration sensors placed on the mechanical housing of the circuit breaker, signal processing circuits, wireless data acquisition receiving and sending modules, vibration measurement boards, and lower computers. The vibration sensor on the circuit breaker monitors the mechanical vibration response signal of opening and closing of the circuit breaker. After signal processing by the signal processing circuit, the wireless data acquisition receiving and sending module performs short-distance wireless transmission and reception, and the vibration measurement board wirelessly transmits the signal. The vibration signal is collected and sent to the lower-level computer, and then compared with the characteristic waveform "fingerprint" of the normal circuit breaker at the moment of switching and closing in the lower-level computer in order to determine wh...

Embodiment 2

[0031] Such as figure 2 Shown is one of the characteristic waveform "fingerprints" at the moment of closing of a normal circuit breaker, that is, the basic structure of the fingerprint waveform at the moment of closing of a high-voltage circuit breaker, but the details of the fingerprint waveforms at the moment of closing of different types of circuit breakers are different , the main difference is its amplitude. The fingerprint waveforms of different types of circuit breakers at the moment of closing are stored in the database of the lower computer LABVIEW software. Such as figure 2 The important shock vibration moments corresponding to are as follows:

[0032] t1: weak vibration corresponding to the action of the closing contactor on the bracket (contactor closing moment);

[0033] t2: The closing iron core drives the transmission link of the mechanism to start to move (the moment when the contact system starts to move);

[0034] t3: contact time of moving and static co...

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PUM

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Abstract

The invention discloses an on-line monitoring system for a high-voltage breaker based on vibration characteristics. The on-line monitoring system comprises a vibration sensor arranged on a mechanical shell of a breaker, a signal processing circuit, a wireless data receiving and sending module, a vibration measuring plate and a lower computer, wherein the vibration sensor is used for collecting mechanical vibration response signals of a breaker switch; after the mechanical vibration response signals are subjected to signal pre-treatment by the signal processing circuit, short-range wireless receiving and sending can be performed by the wireless data receiving and sending module; the vibration measuring plate is used for collecting the wirelessly transmitted vibration signals and sending the signals to the lower computer; and the vibration signals are sequentially compared with a characteristic waveform 'fingerprint' at a moveably switching moment of the normal breaker stored in the lower computer, so as to judge whether the breaker is in mechanical fault. The on-line monitoring system has the advantages that the method is simple, the mounting and maintenance are convenient, and the sensor need not be placed in the breaker, and the like, so that the danger of mounting personnel is greatly reduced.

Description

technical field [0001] The invention relates to the application fields of power equipment, signal processing, sensor network and the like, in particular to an on-line monitoring system of a high-voltage circuit breaker based on vibration characteristics. Background technique [0002] The high-voltage circuit breaker can not only cut off or close the no-load current and load current in the high-voltage circuit, but also cut off the overload current and short-circuit current through the function of the relay protection device when the system fails. It has a fairly complete arc-extinguishing structure and Sufficient breaking capacity can be divided into: oil circuit breaker (more oil circuit breaker, less oil circuit breaker), sulfur hexafluoride circuit breaker (SF6 circuit breaker), vacuum circuit breaker, compressed air circuit breaker, etc. According to national standards, high-voltage circuit breakers refer to circuit breakers with a working voltage higher than 6KV. [00...

Claims

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Application Information

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IPC IPC(8): G01M13/00G01H1/12
Inventor 赵小强张雨王彦本
Owner XIAN UNIV OF POSTS & TELECOMM
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