CN104897066A - Method and device for monitoring displacement of iron core in transformer - Google Patents

Method and device for monitoring displacement of iron core in transformer Download PDF

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Publication number
CN104897066A
CN104897066A CN201510329375.7A CN201510329375A CN104897066A CN 104897066 A CN104897066 A CN 104897066A CN 201510329375 A CN201510329375 A CN 201510329375A CN 104897066 A CN104897066 A CN 104897066A
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displacement
iron core
transformer
judged result
core inside
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CN201510329375.7A
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CN104897066B (en
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马思聪
马胤刚
段成云
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SHENYANG HONGJI ELECTRICAL CO Ltd
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SHENYANG HONGJI ELECTRICAL CO Ltd
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Abstract

The invention discloses a method and device for monitoring the displacement of an iron core in a transformer. The method comprises: receiving displacement information used for indicating the displacement degree of the iron core in the transformer and sent from a displacement sensor; receiving vibration information used for indicating the amplitude of the vibration of the transformer and sent from an impact recorder; and determining the actual displacement of the iron core in the transformer according to the displacement information and the vibration information and generating a determined result, wherein the determined result comprises that the iron core is displaced or the iron core is not displaced. The monitoring device is produced on the basis of the above method. The method and the device have advantages of reasonable design, convenient use, accurate monitored results, and low false alarm rate, save a plenty of maintenance cost for manufacturers, and achieve great economic benefit.

Description

A kind of monitoring method of iron core inside transformer displacement and monitoring device thereof
Technical field
The present invention relates to transformer, specifically provide a kind of monitoring method and monitoring device thereof of iron core inside transformer displacement.
Background technology
Transformer utilizes the principle of electromagnetic induction to change the device of alternating voltage, and main member is primary coil, secondary coil and iron core.Usual transformer is after manufacturer has assembled, be transported to working-yard again, but transformer can due to Uneven road in transportation, choppy, engine vibration, tire be bad, bring to a halt, the reason such as to knock into the back produces and impacts and vibrations, thus cause the displacement in various degree of inside transformer iron core, bring major safety risks in transformer operation afterwards.
In the past, in order to monitor the misalignment of inside transformer iron core, by installing the vibrations produced in the way monitoring transformer transporting of impact record instrument in transformer outside, and the misalignment of iron core is inferred according to the shock value size of record, usually after the acceleration exceeding the 3g that national correlation department specifies, can judge that iron core is subjected to displacement, but, even if after there occurs the impact endurance test shock more than 3g, whether iron core really can therefore displacement, displacement is how many, whether the displacement occurred the actual conditions such as within installation dimensions, all there is no concrete data to prove in the past, after isallobaric device to erecting stage, transformer overhead guard must be opened, supervisory personnel could confirm after entering inner actual checking.So have many drawbacks, first have the unnecessary maintenance overhaul expense in 100,000.Secondly, after also opening upper cover because of scene, the objectionable impuritiess such as various dust, moisture, air enter transformer and bring uncertain potential safety hazard, thus affect transformer real work quality and life-span.3rd production time incuring loss through delay transformer brings directly, indirect economic loss.
Therefore, research and develop a kind of reliable monitoring method and device of iron core inside transformer displacement, become people's problem demanding prompt solution.
Summary of the invention
Given this, the object of the present invention is to provide a kind of monitoring method and monitoring device thereof of iron core inside transformer displacement, inaccurate at least to solve the monitoring result existed in the monitoring method of iron core inside transformer displacement in the past, cause maintenance overhaul costly, affect transformer work quality, life-span, bring the problems such as economic loss.
One aspect of the present invention provides a kind of monitoring method of iron core inside transformer displacement, it is characterized in that, comprising:
The displacement information for representing described iron core inside transformer displacement size that received bit displacement sensor sends;
Receive the vibration information for representing described transformer magnitude of vibrations size that impact record instrument sends;
Judge the real misalignment of described iron core inside transformer according to institute's displacement information and described vibration information and generate judged result, described judged result comprises described iron core and is subjected to displacement and is not subjected to displacement with described iron core.
Preferably, the monitoring method of described iron core inside transformer displacement, also comprises: when described judged result be described iron core be subjected to displacement time, generate warning message and be also sent to Surveillance center.
Further preferably, described foundation institute's displacement information and described vibration information judge the real misalignment of described iron core inside transformer and generate judged result step to comprise:
When in the described displacement information received, iron core inside transformer displacement size exceedes threshold value, and simultaneously described in when transformer magnitude of vibrations size exceedes threshold value in the vibration information that receives, generate the judged result that described iron core is subjected to displacement;
Otherwise, generate the judged result that described iron core is not subjected to displacement.
Further preferably, institute's displacement sensors is optical fibre displacement sensor.
The present invention additionally provides a kind of monitoring device of iron core inside transformer displacement on the other hand, it is characterized in that, comprising:
Displacement transducer, for monitoring the displacement size of described iron core inside transformer;
Impact record instrument, for monitoring the size of described transformer magnitude of vibrations;
Data acquisition unit, be connected with institute's displacement sensors and described impact record instrument respectively, the displacement information about described iron core inside transformer displacement size that displacement sensors sends for receiving and the vibration information about described transformer magnitude of vibrations size that described impact record instrument sends, and judge the real misalignment of described iron core inside transformer according to institute's displacement information and described vibration information and generate judged result, described judged result comprises described iron core and is subjected to displacement and is not subjected to displacement with described iron core.
Preferably, the monitoring device of described iron core inside transformer displacement, also comprise: alarm unit, be connected with described data acquisition unit and Surveillance center respectively, for receiving the judged result that described data acquisition unit sends, when described judged result be described iron core be subjected to displacement time, described alarm unit sends alerting signal to described Surveillance center, otherwise does not send.
Further preferably, described data acquisition unit comprises:
Data receipt unit, the displacement information about described iron core inside transformer displacement size that displacement sensors sends for receiving and the vibration information about described transformer magnitude of vibrations size that described impact record instrument sends;
Data processing unit, be connected with described data receipt unit, for carrying out the process of displacement information in described data receipt unit and described vibration information, when in institute's displacement information, iron core displacement size exceedes threshold value, and when simultaneously transformer magnitude of vibrations size exceedes threshold value in described vibration information, generate the judged result that described iron core is subjected to displacement, otherwise generate the judged result that described iron core is not subjected to displacement;
Display unit, is connected with described data processing unit, for showing the judged result of described data processing unit.
Further preferably, institute's displacement sensors is optical fibre displacement sensor, comprising: static probe and the probe that slides, and described static probe is installed on described transformer chassis, on the iron core that the described probe that slides is installed in described transformer.
Further preferably, described impact record instrument is installed on the upper top cover of described transformer.
The monitoring method of iron core inside transformer displacement provided by the invention, carrys out the real displacement situation of comprehensive descision iron core inside transformer by monitoring the size of transformer magnitude of vibrations in the displacement size of iron core inside transformer and transport simultaneously.From the angle of science, can not be subjected to displacement by judgement transformer core very only according to a kind of displacement alerting signal, because any instrument and equipment has the possibility of mistaking signal, if the pilot signal of two or more different principle can be provided simultaneously, simultaneously as evidence, just can avoid providing error message because of monitoring instrument faults itself, thus true, science, accurately data are provided in transformer transporting process, improve the accuracy of iron core inside transformer displacement monitoring.Meanwhile, present invention also offers a kind of monitoring device prepared based on above-mentioned monitoring method.
The monitoring method of iron core inside transformer displacement provided by the invention and monitoring device thereof, have reasonable in design, easy to use, and monitoring result is accurate, and the advantages such as rate of false alarm is low, for producer has saved a large amount of maintenance costs, produce huge economic benefit.
Accompanying drawing explanation
Fig. 1 is the monitoring device module diagram of iron core inside transformer displacement;
Fig. 2 is the transformer device structure schematic diagram of the monitoring device being provided with iron core displacement;
Fig. 3 is the module diagram of the monitoring device being arranged on the displacement of transformer upper core.
Embodiment
Below in conjunction with specific embodiment, the present invention is further expalined, but is not limited to protection scope of the present invention.
In order to solve the accurate measurements that cannot realize iron core inside transformer displacement in prior art, present embodiment provides a kind of monitoring method of iron core inside transformer displacement, comprising:
The displacement information for representing described iron core inside transformer displacement size that received bit displacement sensor sends;
Receive the vibration information for representing described transformer magnitude of vibrations size that impact record instrument sends;
Judge the real misalignment of described iron core inside transformer according to institute's displacement information and described vibration information and generate judged result, described judged result comprises described iron core and is subjected to displacement and is not subjected to displacement with described iron core.
The magnitude of vibrations size of iron core inside transformer displacement size and transformer is monitored in this monitoring method simultaneously, verified by displacement information and vibration information two groups of data simultaneously, thus effectively can avoid the erroneous judgement that causes because mistake appears in any one group of data, thus improve the accuracy rate of this monitoring method.Meanwhile, because above-mentioned two groups of data are pilot signals of two groups of different principle, simultaneously as evidence, the authenticity of Monitoring Data, science and accuracy can be improved further.
Conveniently people are for the monitoring management of transformer, as the improvement of technical scheme, alarming step can also be comprised, that is, when above-mentioned judged result be described iron core be subjected to displacement time, generate warning message and be also sent to Surveillance center, after Surveillance center receives alerting signal, overhaul plan can be carried out to corresponding transformer, to realize the on-call maintenance of transformer, realize the real-time monitoring for transformer performance.
Wherein, judge the real misalignment of described iron core inside transformer and generate judged result step to comprise according to institute's displacement information and described vibration information:
When in the described displacement information received, iron core inside transformer displacement size exceedes threshold value, and simultaneously described in when transformer magnitude of vibrations size exceedes threshold value in the vibration information that receives, generate the judged result that described iron core is subjected to displacement;
Otherwise, generate the judged result that described iron core is not subjected to displacement.
Wherein, the threshold value of iron core inside transformer displacement size and the threshold value of transformer magnitude of vibrations size preset, can set according to national standard or experience, be subjected to displacement size exceeded threshold value when monitoring iron core inside transformer, and monitor when iron core inside transformer is subjected to displacement simultaneously, transformer also there occurs vibrations really, then can determine that the iron core in transformer there occurs displacement really; If only have in displacement information and record iron core inside transformer and be subjected to displacement or record in vibration information transformer and shake, supvr can determine whether mistaking signal according to actual conditions, determine whether to uncap maintenance to transformer.
Due to the environment that inside transformer is high-intensity magnetic field, high voltage and big current, in order to really enable displacement transducer be applicable to this working environment, preferably, institute's displacement sensors is optical fibre displacement sensor.
See Fig. 1, the present embodiment produces a kind of monitoring device of iron core inside transformer displacement according to above-mentioned monitoring method, comprising: for monitoring the displacement transducer 1 of the displacement size of described iron core inside transformer, for monitoring the impact record instrument 2 of the size of described transformer magnitude of vibrations, the data acquisition unit 3 be connected with institute's displacement sensors and described impact record instrument respectively, the vibration information about described transformer magnitude of vibrations size that this data acquisition unit 3 displacement information about described iron core inside transformer displacement size that displacement sensors 1 sends for receiving and described impact record instrument 2 send, and judge the real misalignment of described iron core inside transformer according to institute's displacement information and described vibration information and generate judged result, described judged result comprises described iron core and is subjected to displacement and is not subjected to displacement with described iron core, wherein displacement transducer and impact record instrument are commercial ordinary sensors and registering instrument.
In order to realize the warning function of the monitoring device of iron core inside transformer displacement, as the improvement of technical scheme, this monitoring device also comprises alarm unit 4, be connected with described data acquisition unit and Surveillance center 5 respectively, for receiving the judged result that described data acquisition unit sends, when described judged result be described iron core be subjected to displacement time, described alarm unit 4 sends alerting signal to described Surveillance center 5, otherwise does not send.
See Fig. 1, described data acquisition unit 3 comprises:
Data receipt unit 31, the displacement information about described iron core inside transformer displacement size that displacement sensors sends for receiving and the vibration information about described transformer magnitude of vibrations size that described impact record instrument sends;
Data processing unit 32, be connected with described data receipt unit, for carrying out the process of displacement information in described data receipt unit and described vibration information, when in institute's displacement information, iron core displacement size exceedes threshold value, and when simultaneously transformer magnitude of vibrations size exceedes threshold value in described vibration information, generate the judged result that described iron core is subjected to displacement, otherwise generate the judged result that described iron core is not subjected to displacement;
Display unit 33, is connected with described data processing unit, for showing the judged result of described data processing unit.
Wherein, in order to adapt to the working environment of transformer medium-high magnetic field, high voltage, big current, institute's displacement sensors is optical fibre displacement sensor, comprise: static probe and the probe that slides, described static probe is installed on described transformer chassis, and on the iron core that the described probe that slides is installed in described transformer, the detection accuracy of fibre-optical probe reaches 0.002mm, therefore any small displacement can monitor, thus ensure that the safety in transformer transporting process; Described impact record instrument is installed on the upper top cover of described transformer.
The introduction of each embodiment above-mentioned carries out writing according to the mode of going forward one by one, and highlights the difference of each embodiment, its similar portion, can cross-reference.
Below for the monitoring device of iron core inside transformer displacement being applied to the concrete case in transformer.
See Fig. 2, this transformer 6 comprises transformer-cabinet 61, iron core 62 is provided with in transformer-cabinet 61, this transformer 6 is provided with the monitoring device of iron core inside transformer displacement, this monitoring device comprises displacement transducer 1, the data acquisition unit 3 that impact record instrument 2 is connected with displacement transducer 1 and impact record instrument 2, wherein, displacement transducer 1 comprises static probe 11 and slip probe 12, described static probe 11 is installed on the base plate 611 of transformer-cabinet 61, and described slip probe 12 is installed on iron core 62, static probe is connected with the data acquisition unit 3 being arranged at transformer-cabinet 61 outside by connection line of optic fibre 7 with slip probe, because connection line of optic fibre 7 needs through transformer-cabinet 61, connection line of optic fibre 7 is set with through device 8 in outside, by the sidewall of through device 8 through transformer-cabinet 61, the top cover place of transformer-cabinet 61 is provided with impact record instrument 2 simultaneously, this impact record instrument 2 is also connected with data acquisition unit 3 by connection line of optic fibre 7, thus the Real-Time Monitoring realized for this transformer, simultaneously in order to realize warning function, alarm unit can also be connected with data acquisition unit 3, the monitoring device module diagram of concrete iron core inside transformer displacement, can see Fig. 3.By experimental results demonstrate for above-mentioned transformer, its monitoring accuracy can reach 99%.
The implementation case is the preferred embodiment of the invention, is not limited to protection scope of the present invention.

Claims (9)

1. a monitoring method for iron core inside transformer displacement, is characterized in that, comprising:
The displacement information for representing described iron core inside transformer displacement size that received bit displacement sensor sends;
Receive the vibration information for representing described transformer magnitude of vibrations size that impact record instrument sends;
Judge the real misalignment of described iron core inside transformer according to institute's displacement information and described vibration information and generate judged result, described judged result comprises described iron core and is subjected to displacement and is not subjected to displacement with described iron core.
2. according to the monitoring method of iron core inside transformer displacement described in claim 1, it is characterized in that, also comprise: when described judged result be described iron core be subjected to displacement time, generate warning message and be also sent to Surveillance center.
3. according to the monitoring method of iron core inside transformer displacement described in claim 1 or 2, it is characterized in that, described foundation institute's displacement information and described vibration information judge the real misalignment of described iron core inside transformer and generate judged result step to comprise:
When in the described displacement information received, iron core inside transformer displacement size exceedes threshold value, and simultaneously described in when transformer magnitude of vibrations size exceedes threshold value in the vibration information that receives, generate the judged result that described iron core is subjected to displacement;
Otherwise, generate the judged result that described iron core is not subjected to displacement.
4. according to the monitoring method of iron core inside transformer displacement described in claim 1, it is characterized in that: institute's displacement sensors is optical fibre displacement sensor.
5. a monitoring device for iron core inside transformer displacement, is characterized in that, comprising:
Displacement transducer, for monitoring the displacement size of described iron core inside transformer;
Impact record instrument, for monitoring the size of described transformer magnitude of vibrations;
Data acquisition unit, be connected with institute's displacement sensors and described impact record instrument respectively, the displacement information about described iron core inside transformer displacement size that displacement sensors sends for receiving and the vibration information about described transformer magnitude of vibrations size that described impact record instrument sends, and judge the real misalignment of described iron core inside transformer according to institute's displacement information and described vibration information and generate judged result, described judged result comprises described iron core and is subjected to displacement and is not subjected to displacement with described iron core.
6. according to the monitoring device of iron core inside transformer displacement described in claim 5, it is characterized in that, also comprise: alarm unit, be connected with described data acquisition unit and Surveillance center respectively, for receiving the judged result that described data acquisition unit sends, when described judged result be described iron core be subjected to displacement time, described alarm unit sends alerting signal to described Surveillance center, otherwise does not send.
7. according to the monitoring device of iron core inside transformer displacement described in claim 5, it is characterized in that, described data acquisition unit comprises:
Data receipt unit, the displacement information about described iron core inside transformer displacement size that displacement sensors sends for receiving and the vibration information about described transformer magnitude of vibrations size that described impact record instrument sends;
Data processing unit, be connected with described data receipt unit, for carrying out the process of displacement information in described data receipt unit and described vibration information, when in institute's displacement information, iron core displacement size exceedes threshold value, and when simultaneously transformer magnitude of vibrations size exceedes threshold value in described vibration information, generate the judged result that described iron core is subjected to displacement, otherwise generate the judged result that described iron core is not subjected to displacement;
Display unit, is connected with described data processing unit, for showing the judged result of described data processing unit.
8. according to the monitoring device of iron core inside transformer displacement described in claim 5, it is characterized in that, institute's displacement sensors is optical fibre displacement sensor, comprise: static probe and the probe that slides, described static probe is installed on described transformer chassis, on the iron core that the described probe that slides is installed in described transformer.
9. according to the monitoring device of iron core inside transformer displacement described in claim 5, it is characterized in that: described impact record instrument is installed on the upper top cover of described transformer.
CN201510329375.7A 2015-06-15 2015-06-15 A kind of monitoring method and its monitoring device of iron core inside transformer displacement Active CN104897066B (en)

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