CN103900683A - Portable online monitoring dual-purpose and smart electronic device for transformer vibration - Google Patents
Portable online monitoring dual-purpose and smart electronic device for transformer vibration Download PDFInfo
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- CN103900683A CN103900683A CN201410140263.2A CN201410140263A CN103900683A CN 103900683 A CN103900683 A CN 103900683A CN 201410140263 A CN201410140263 A CN 201410140263A CN 103900683 A CN103900683 A CN 103900683A
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Abstract
The invention discloses a portable online monitoring dual-purpose and smart electronic device for transformer vibration. The smart electronic device comprises a vibration sensor, a signal conditioning module, a trigger module, a multi-channel synchronous A/D converter, a main control module, an optical fiber/Ethernet interface, a static random access memory. The vibration sensor, the trigger module and the multi-channel synchronous A/D converter are connected with the signal conditioning module. The trigger module, the multi-channel synchronous A/D converter, the optical fiber/Ethernet interface and the static random access memory are connected with the main control module. The portable online monitoring dual-purpose and smart electronic device judges the mechanical state of a transformer winding and displays the mechanical state in real time by monitoring changes of secondary harmonic frequency of main excitation frequency and the amplitude of harmonic components of the secondary harmonic frequency of the main excitation frequency.
Description
Technical field
The invention belongs to intelligent grid on-line monitoring apparatus field, particularly relate to a kind of on-line monitoring vibration monitoring device based on Transformer Winding axial vibration modeling.
Background technology
The winding that the abnormal vibrations of transformer causes is shifted or distortion, can destroy the insulation system of transformer, when serious, can cause caving in of winding.The vibration of transformer is to be caused by the vibration of transformer body (iron core and winding) and the vibration of cooling device, and it has its source in: the core vibration that (1) siliconized plate magnetostriction causes.When so-called magnetostriction is exactly iron core excitation, will increases, and will dwindle perpendicular to the size of magnetic line of force direction siliconized plate along the size of magnetic line of force direction siliconized plate, the variation of this size is called magnetostriction.Magnetostriction makes iron core periodically vibration along with the variation of excitation frequency; (2) between siliconized plate seam crossing and lamination, there is the electromagnetic attraction producing because of leakage field, thereby cause the vibration of iron core; (3), in the time having load current to pass through in winding, between winding, between line cake, produce Dynamic Electromagnetic Force between wire turn, cause the vibration of winding; (4) leakage field causes the oil tank wall vibration of (comprising magnetic shielding etc.); (5) for the iron core reactor with air gap, the core vibration that in stem air gap, the leakage field at nonmagnetic substance pad place causes in addition etc.
Summary of the invention
Technical matters to be solved by this invention be to provide a kind of for transformer vibration the portable and dual-purpose intelligent electronic device of on-line monitoring, its amplitude by monitoring master drive frequency two frequencys multiplication and harmonic component thereof changes to judge Transformer Winding machine performance, and shows in real time.
The present invention solves above-mentioned technical matters by following technical proposals: a kind of for transformer vibration the portable and dual-purpose intelligent electronic device of on-line monitoring, it is characterized in that, its involving vibrations sensor, signal condition module, trigger module, multi-channel synchronous A/D converter, main control module, optical fiber/Ethernet interface, static RAM, vibration transducer, trigger module, multi-channel synchronous A/D converter is all connected with signal condition module, trigger module, multi-channel synchronous A/D converter, optical fiber/Ethernet interface, static RAM is all connected with main control module.
Preferably, described trigger module comprises interconnective D/A converter and comparer.
Preferably, described vibration transducer is mainly transformed into electric signal the vibration signal on transformer case.
Preferably, described signal condition module, for vibration transducer provides steady current, makes normal operation of sensor, simultaneously the DC component in isolation sensor output signal.
Preferably, described trigger module, according to the threshold values of actual conditions dynamic setting vibration signals collecting, triggers main control module Vibration on Start-up signals collecting flow process in the time that vibration signal exceedes threshold voltage.
Preferably, described multi-channel synchronous A/D converter completes the synchronous digital conversion of each passage vibration signal in intelligent electronic device; Main control module completes data acquisition, the analysis of whole system, and analysis result is shown on liquid crystal display, sends with IEC61850 standard format simultaneously.
Preferably, described optical fiber/Ethernet interface is standard communication interface, completes vibration monitoring intelligent electronic device and is connected with the communication of other system.
Positive progressive effect of the present invention is: the present invention changes to judge Transformer Winding machine performance by the amplitude of monitoring master drive frequency two frequencys multiplication and harmonic component thereof, and shows in real time.
Accompanying drawing explanation
Fig. 1 is that the present invention is for transformer vibration is portable and the structural representation of the intelligent electronic device that on-line monitoring is dual-purpose.
The schematic diagram of the basket vibration response curve shown in Fig. 2 emulation of the present invention.
Fig. 3 is the amplitude frequency diagram after Fig. 2 Fourier conversion.
Fig. 4 is for can obtain corresponding amplitude frequency diagram by means of simulation calculation.
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.
As shown in Figure 1, the present invention is portable and dual-purpose intelligent electronic device involving vibrations sensor, signal condition module, trigger module, multi-channel synchronous A/D converter, main control module, optical fiber/Ethernet interface, the SRAM(static RAM of on-line monitoring for transformer vibration), vibration transducer, trigger module, multi-channel synchronous A/D converter are all connected with signal condition module, and trigger module, multi-channel synchronous A/D converter, optical fiber/Ethernet interface, static RAM are all connected with main control module.Trigger module comprises interconnective D/A converter and comparer.
Vibration transducer is mainly transformed into electric signal the vibration signal on transformer case, and signal condition module, for vibration transducer provides steady current, makes normal operation of sensor, simultaneously the DC component in isolation sensor output signal; Trigger module, according to the threshold values of actual conditions dynamic setting vibration signals collecting, triggers main control module Vibration on Start-up signals collecting flow process in the time that vibration signal exceedes threshold voltage.Multi-channel synchronous A/D converter completes the synchronous digital conversion of each passage vibration signal in IED (intelligent electronic device); Main control module completes data acquisition, the analysis of whole system, and analysis result is shown on liquid crystal display, sends with IEC61850 standard format simultaneously; Optical fiber/Ethernet interface is standard communication interface, completes vibration monitoring IED and is connected with the communication of other system.SRAM(static RAM) for completing the storage of information.
The intelligent electronic device that the present invention is portable for transformer vibration and on-line monitoring is dual-purpose uses the tupe of ARM and single-chip microcomputer, Monitoring Data and analysis result are presented on the liquid crystal display of device in real time, possess optical fiber communication port simultaneously, data can be uploaded to Control of Power Plant chamber by IEC61850 agreement.Band liquid crystal display shows that making device can be used as portable instrument uses at the scene, and band data upload port can use device as on-line monitoring equipment for a long time.
In simulation process, with the electric current of 50Hz, winding is encouraged, by calculating, can obtain the basket vibration response curve shown in following Fig. 2.As seen from the figure, along with reducing of pretightning force, the vibration amplitude of winding increases gradually.Acceleration responsive signal in Fig. 2 is carried out to Fourier conversion, obtain amplitude frequency diagram as shown in Figure 3.As seen from the figure, the 100Hz electric power response amplitude being produced by 50Hz current excitation increases with the reduction of pretightning force.In addition, due to the non-linear effects of winding cushion block, cause having harmonic component in response signal, the Changing Pattern of its harmonic component is not identical with 100Hz's, but harmonic component can fluctuate with the loosening of pretightning force.With the steady current of 350Hz and 600Hz, winding is encouraged respectively, can obtain corresponding amplitude frequency diagram as shown in Figure 4 by means of simulation calculation.As seen from the figure, along with the variation of pretightning force, also all there is variation in the response amplitude of corresponding electric power frequency, and just the performance of the Changing Pattern of electric power response amplitude is different separately.In the time that transformer suffers short-circuit impact that the pretightning force of winding is become flexible, its winding dynamics also will change, thereby reflected in the variation of response amplitude corresponding to its excitation frequency, the change of its vibratory response amplitude mainly concentrates in excitation frequency two frequencys multiplication and harmonic component thereof, therefore in transformer online monitoring, can change to judge Transformer Winding machine performance by the amplitude of monitoring master drive frequency two frequencys multiplication and harmonic component thereof.
Those skilled in the art can carry out various remodeling and change to the present invention.Therefore, the present invention has covered various remodeling and the change in the scope that falls into appending claims and equivalent thereof.
Claims (7)
1. one kind is vibrated the portable and dual-purpose intelligent electronic device of on-line monitoring for transformer, it is characterized in that, its involving vibrations sensor, signal condition module, trigger module, multi-channel synchronous A/D converter, main control module, optical fiber/Ethernet interface, static RAM, vibration transducer, trigger module, multi-channel synchronous A/D converter are all connected with signal condition module, and trigger module, multi-channel synchronous A/D converter, optical fiber/Ethernet interface, static RAM are all connected with main control module.
As claimed in claim 1 for transformer vibration the portable and dual-purpose intelligent electronic device of on-line monitoring, it is characterized in that, described trigger module comprises interconnective D/A converter and comparer.
As claimed in claim 1 for transformer vibration the portable and dual-purpose intelligent electronic device of on-line monitoring, it is characterized in that, described vibration transducer is mainly transformed into electric signal the vibration signal on transformer case.
As claimed in claim 3 for transformer vibration the portable and dual-purpose intelligent electronic device of on-line monitoring, it is characterized in that, described signal condition module, for vibration transducer provides steady current, makes normal operation of sensor, simultaneously the DC component in isolation sensor output signal.
As claimed in claim 4 for transformer vibration the portable and dual-purpose intelligent electronic device of on-line monitoring, it is characterized in that, described trigger module, according to the threshold values of actual conditions dynamic setting vibration signals collecting, triggers main control module Vibration on Start-up signals collecting flow process in the time that vibration signal exceedes threshold voltage.
As claimed in claim 5 for transformer vibration the portable and dual-purpose intelligent electronic device of on-line monitoring, it is characterized in that, described multi-channel synchronous A/D converter completes the synchronous digital conversion of each passage vibration signal in intelligent electronic device; Main control module completes data acquisition, the analysis of whole system, and analysis result is shown on liquid crystal display, sends with IEC61850 standard format simultaneously.
As claimed in claim 6 for transformer vibration the portable and dual-purpose intelligent electronic device of on-line monitoring, it is characterized in that, described optical fiber/Ethernet interface is standard communication interface, completes vibration monitoring intelligent electronic device and is connected with the communication of other system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410140263.2A CN103900683A (en) | 2014-04-10 | 2014-04-10 | Portable online monitoring dual-purpose and smart electronic device for transformer vibration |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410140263.2A CN103900683A (en) | 2014-04-10 | 2014-04-10 | Portable online monitoring dual-purpose and smart electronic device for transformer vibration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330691A (en) * | 2014-10-31 | 2015-02-04 | 国家电网公司 | Online monitoring system for power transformer winding vibration signals |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709995A (en) * | 2009-12-24 | 2010-05-19 | 浙江大学 | Methods for vibration online monitoring and fault diagnosis of power transformer |
| CN102628919A (en) * | 2012-04-25 | 2012-08-08 | 上海交通大学 | Transformer bushing insulation state on-line monitoring system |
| CN102628727A (en) * | 2012-04-25 | 2012-08-08 | 上海交通大学 | Vibration monitoring system for transformer |
| CN203479944U (en) * | 2013-08-27 | 2014-03-12 | 武汉百楚科技有限公司 | Transformer diagnosis system |
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2014
- 2014-04-10 CN CN201410140263.2A patent/CN103900683A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709995A (en) * | 2009-12-24 | 2010-05-19 | 浙江大学 | Methods for vibration online monitoring and fault diagnosis of power transformer |
| CN102628919A (en) * | 2012-04-25 | 2012-08-08 | 上海交通大学 | Transformer bushing insulation state on-line monitoring system |
| CN102628727A (en) * | 2012-04-25 | 2012-08-08 | 上海交通大学 | Vibration monitoring system for transformer |
| CN203479944U (en) * | 2013-08-27 | 2014-03-12 | 武汉百楚科技有限公司 | Transformer diagnosis system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330691A (en) * | 2014-10-31 | 2015-02-04 | 国家电网公司 | Online monitoring system for power transformer winding vibration signals |
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Application publication date: 20140702 |