CN104897267A - On-line monitoring device for vibration signals of on-load tap changer - Google Patents
On-line monitoring device for vibration signals of on-load tap changer Download PDFInfo
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- CN104897267A CN104897267A CN201510227188.8A CN201510227188A CN104897267A CN 104897267 A CN104897267 A CN 104897267A CN 201510227188 A CN201510227188 A CN 201510227188A CN 104897267 A CN104897267 A CN 104897267A
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- tap changer
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Abstract
The invention discloses an on-line monitoring device for vibration signals of an on-load tap changer. The on-line monitoring device comprises an acceleration sensor, a permanent magnet, a charge amplifier, a signal adapter, an A/D conversion module, a microprocessor ARM, a first GSM (Global System for Mobile Communications) module, a second GSM module, a server, a memory, a display and a relay J. The on-line monitoring device has the advantages: handover time change, poor contact, contact abrasion, spring electricity decline, arc and the like of the on-load tap changer can be monitored by monitoring various vibration signals of the on-load tap changer during handover, and then the on-load tap changer in a normal state or a fault can be diagnosed; and the on-line monitoring device can reflect the damage degree of the on-load tap changer in real time on line, timely give early warning information and remind operation and maintenance staffs to take measures to prevent faults of the on-load tap changer.
Description
Technical field
The invention belongs to ULTC on-line monitoring technique field, be specifically related to a kind of on-load voltage regulating switch vibration signal on-Line Monitor Device.
Background technology
On-load voltage regulating switch (OLTC, On-load Tap Changer) is that transformer is in operation the assembly of unique hot line job, and it is the core component that transformer completes pressure regulation, is also one of important matching component of transformer.It, by under the condition of not interrupting transformer load, carries out the operation of tap conversion, changes the distance number ratio of transformer.Can on-load voltage regulating switch meet transformer reliability of operation over a long time, directly has influence on the dependability of transformer.Domestic average statistics data show, OLTC fault accounts for more than 20% of transformer fault, is only second to winding failure.With winding failure unlike, people are abundant not to the understanding of on-load voltage regulating switch fault, this is mainly because on-load voltage regulating switch action also infrequently in the past, not deep enough to its research, therefore run safely and reliably in order to ensure tap changer, carry out the research of monitoring to its state and fault diagnosis, improve the intelligent level of fault detect, ensure that the safe operation of ULTC has great importance.
Summary of the invention
Technical matters to be solved by this invention be to provide a kind of can reflect on-load voltage regulating switch online in real time damaged condition, provide early warning information in time, remind operation maintenance personnel to take measures the on-load voltage regulating switch vibration signal on-Line Monitor Device preventing on-load voltage regulating switch from breaking down.
For solving the problems of the technologies described above adopted technical scheme be: a kind of on-load voltage regulating switch vibration signal on-Line Monitor Device, comprises acceleration transducer, permanent magnet, charge amplifier, signal adapter, A/D modular converter, microprocessor ARM, the first gsm module, the second gsm module, server, storer, display and relay J;
Described acceleration transducer is adsorbed on the nut of the connection terminal for fixing on-load voltage regulating switch by permanent magnet; The respective input of charge amplifier described in the output termination of described acceleration transducer; The respective input of signal adapter described in the output termination of described charge amplifier; The respective input of A/D modular converter described in the output termination of described signal adapter; The corresponding port of described A/D modular converter and described microprocessor ARM is bi-directionally connected;
The COM port of described microprocessor ARM connects the respective input of described first gsm module; Described first gsm module and described second gsm module are by GSM network wireless connections; The respective input of server described in the output termination of described second gsm module;
The GPIO port of described microprocessor ARM meets the swing arm J-4 of described relay J; The normally closed contact J-3 ground connection of described relay J; The stationary contact J-2 of described relay J connects+3.3V direct supply; The coil J-1 of described relay J is connected on the two ends of+12V direct supply after connecting with the auxiliary contact K of on-load voltage regulating switch;
The input end of described display and storer connects the corresponding output end of described microprocessor ARM respectively.
The model of described acceleration transducer is ADXL345; The model of described signal adapter is LC0208; The model of described charge amplifier is DHF-10; The model of described A/D modular converter is AD5780; The model of described microprocessor ARM is SamsungS3C2440; Described first gsm module is Samsung GT-Y3400; Described second gsm module is Samsung GT-Y3400; Described server is Dell PowerEdge 29; Described display is upright FG769-VC; The model of described storer is M25P128-VMF6TP.
The invention has the beneficial effects as follows: vibration signal when the present invention is switched by monitoring on-load voltage regulating switch, just change, the contact that can monitor out on-load voltage regulating switch switching time are bad, contact abrasion, spring decline and the fault such as electric arc, thus tap changer can be diagnosed out to be in normal condition, still there occurs fault; The present invention can the damaged condition of real-time online reflection on-load voltage regulating switch, provides early warning information in time, reminds operation maintenance personnel to take measures to prevent the generation of on-load voltage regulating switch fault.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention.
Embodiment
Embodiment is as shown in Figure 1 known, and it comprises acceleration transducer, permanent magnet, charge amplifier, signal adapter, A/D modular converter, microprocessor ARM, the first gsm module, the second gsm module, server, storer, display and relay J;
Described acceleration transducer is adsorbed on the nut of the connection terminal for fixing on-load voltage regulating switch by permanent magnet; The respective input of charge amplifier described in the output termination of described acceleration transducer; The respective input of signal adapter described in the output termination of described charge amplifier; The respective input of A/D modular converter described in the output termination of described signal adapter; The corresponding port of described A/D modular converter and described microprocessor ARM is bi-directionally connected;
The COM port of described microprocessor ARM connects the respective input of described first gsm module; Described first gsm module and described second gsm module are by GSM network wireless connections; The respective input of server described in the output termination of described second gsm module;
The GPIO port of described microprocessor ARM meets the swing arm J-4 of described relay J; The normally closed contact J-3 ground connection of described relay J; The stationary contact J-2 of described relay J connects+3.3V direct supply; The coil J-1 of described relay J is connected on the two ends of+12V direct supply after connecting with the auxiliary contact K of on-load voltage regulating switch;
The input end of described display and storer connects the corresponding output end of described microprocessor ARM respectively.
The model of described acceleration transducer is ADXL345; The model of described signal adapter is LC0208; The model of described charge amplifier is DHF-10; The model of described A/D modular converter is AD5780; The model of described microprocessor ARM is SamsungS3C2440; Described first gsm module is Samsung GT-Y3400; Described second gsm module is Samsung GT-Y3400; Described server is Dell PowerEdge 29; Described display is upright FG769-VC; The model of described storer is M25P128-VMF6TP.
The course of work of the present invention is as follows: described acceleration transducer obtains the vibration signal of on-load voltage regulating switch; The voltage signal that charge amplifier degree of will speed up sensor exports carries out amplification process; Signal adapter the voltage signal after amplifying process is carried out the bandpass filtering of 100Hz-15kHz and isolated transmission to the input end of A/D modular converter; Described microprocessor ARM judges whether on-load voltage regulating switch is switching state: when on-load voltage regulating switch has switching action, the auxiliary contact K of on-load voltage regulating switch closes, relay J coil J-1 obtains electric, the normally opened contact J-2 of relay J closes, the GPIO end making described microprocessor ARM is high level, then described microprocessor ARM controls described A/D modular converter and converts simulating signal to digital signal, and described microprocessor ARM carries out data acquisition simultaneously; On-load voltage regulating switch machine performance information transmission is given described first gsm module by the COM port of described microprocessor ARM; On-load voltage regulating switch work state information is sent to described second gsm module by GSM network by described first gsm module; Described second gsm module receives on-load voltage regulating switch work state information, and described on-load voltage regulating switch work state information is transferred to described server; Described storer and display store and show voltage adjustment of on-load switch working state information respectively.
On-load voltage regulating switch is when switching, and the motion of its inner principal structural elements is clashed into and friction all can cause surperficial vibration.Such as contact is in a deciliter process, due to along with machinery, chemistry, electricity and hot a series of destructions, make contact material consumption, cause the convex injustice of contact four or distortion, thus causing contact pressure, contact resistance and moment Parameters variation, this makes the vibration performance of on-load voltage regulating switch also change thereupon.When being switched by on-load voltage regulating switch, the various vibration signals of record, can provide the bulk information of mechanical aspects in voltage adjustment of on-load switching over process.Vibration signal during by normally running with tap changer contrasts, change, the contact that just can be tested with voltage adjustment of on-load switching time are bad, contact abrasion, spring decline and the fault such as electric arc, thus tap changer can be diagnosed out to be in normal condition, still there occurs fault.Therefore be monitoring target with vibration signal, Efficient Evaluation can be carried out to the machine performance of on-load voltage regulating switch.
Specific practice is the suitable position at tap changer, as having the position of larger oscillation intensity and larger signal to noise ratio (S/N ratio), installs acceleration vibration transducer.Tap changer gathers vibration signal when carrying out blocked operation, as the foundation of diagnosis after signal transacting, analysis.
Operationally, the contact separation between dynamic and static contact can produce pulse shock power to on-load tap-changer of transformer, has therefore just had vibration signal.This signal is sent to connection terminal via static contact or transformer oil, then by transformer oil to oil tank of transformer.Be not difficult to find out that the vibration signal on on-line checkingi on-load voltage regulating switch connection terminal or oil tank of transformer surface just can detect the situation of on-load voltage regulating switch fault.
Piezoelectric acceleration transducer utilizes spring mass system principle to measure.Can produce the power be directly proportional to acceleration after sensitive core body quality is subject to vibration acceleration effect, piezoelectric can form by after the effect of this power the charge signal be directly proportional to this power along its surface.It has that dynamic range is large, wide frequency range, little by external interference, sturdy and durable and piezoelectric stressed after do not need the features such as extraneous power supply from producing charge signal, be the most widely used vibration measurement sensor.
The piezoelectric acceleration transducer being integrated with charge amplifier selected by vibration transducer.Vibration acceleration signal can be converted to the voltage signal be directly proportional.Acquired vibration signal is directly stored in computing machine by usb data capture card.In order to effectively compare vibration signal. nut is fixed on connection terminal, with permanent magnet, multiple vibration transducer is adsorbed on nut again, the voltage analog signal that vibration signal when simultaneously can extract an OLTC action on each connection terminal is exported by signal adapter is converted to digital signal through A/D capture card, and sends into portable computer and carry out data processing.
The damaged condition of real-time online reflection on-load voltage regulating switch of the present invention, provides early warning information in time, reminds operation maintenance personnel to take measures to prevent the generation of on-load voltage regulating switch fault.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (2)
1. an on-load voltage regulating switch vibration signal on-Line Monitor Device, is characterized in that: comprise acceleration transducer, permanent magnet, charge amplifier, signal adapter, A/D modular converter, microprocessor ARM, the first gsm module, the second gsm module, server, storer, display and relay J;
Described acceleration transducer is adsorbed on the nut of the connection terminal for fixing on-load voltage regulating switch by permanent magnet; The respective input of charge amplifier described in the output termination of described acceleration transducer; The respective input of signal adapter described in the output termination of described charge amplifier; The respective input of A/D modular converter described in the output termination of described signal adapter; The corresponding port of described A/D modular converter and described microprocessor ARM is bi-directionally connected;
The COM port of described microprocessor ARM connects the respective input of described first gsm module; Described first gsm module and described second gsm module are by GSM network wireless connections; The respective input of server described in the output termination of described second gsm module;
The GPIO port of described microprocessor ARM meets the swing arm J-4 of described relay J; The normally closed contact J-3 ground connection of described relay J; The stationary contact J-2 of described relay J connects+3.3V direct supply; The coil J-1 of described relay J is connected on the two ends of+12V direct supply after connecting with the auxiliary contact K of on-load voltage regulating switch;
The input end of described display and storer connects the corresponding output end of described microprocessor ARM respectively.
2. on-load voltage regulating switch vibration signal on-Line Monitor Device according to claim 1, is characterized in that: the model of described acceleration transducer is ADXL345; The model of described signal adapter is LC0208; The model of described charge amplifier is DHF-10; The model of described A/D modular converter is AD5780; The model of described microprocessor ARM is SamsungS3C2440; Described first gsm module is Samsung GT-Y3400; Described second gsm module is Samsung GT-Y3400; Described server is Dell PowerEdge 29; Described display is upright FG769-VC; The model of described storer is M25P128-VMF6TP.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510227188.8A CN104897267A (en) | 2015-05-07 | 2015-05-07 | On-line monitoring device for vibration signals of on-load tap changer |
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| CN201510227188.8A CN104897267A (en) | 2015-05-07 | 2015-05-07 | On-line monitoring device for vibration signals of on-load tap changer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107843778A (en) * | 2017-09-13 | 2018-03-27 | 国网山东省电力公司滨州供电公司 | Long-range loaded switch Vidacare corp and its application method |
| CN109143049A (en) * | 2018-07-28 | 2019-01-04 | 国营芜湖机械厂 | A kind of electromagnetic relay lifetime estimation method based on electrical combined detection technique |
| CN109856501A (en) * | 2019-01-13 | 2019-06-07 | 广西电网有限责任公司南宁供电局 | A kind of on-load tap changers of transformers and winding deformation fault detection method |
| CN112857286A (en) * | 2021-01-05 | 2021-05-28 | 国网安徽省电力有限公司电力科学研究院 | Non-electric quantity protection method and system of on-load tap-changer based on vibration displacement information |
| CN113390591A (en) * | 2021-05-31 | 2021-09-14 | 广西电网有限责任公司电力科学研究院 | On-load tap-changer mechanical vibration detection system and method based on 5G network |
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| CN113390591A (en) * | 2021-05-31 | 2021-09-14 | 广西电网有限责任公司电力科学研究院 | On-load tap-changer mechanical vibration detection system and method based on 5G network |
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Application publication date: 20150909 |
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