CN203629536U - Transformer winding analyzer - Google Patents

Transformer winding analyzer Download PDF

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Publication number
CN203629536U
CN203629536U CN201320849295.0U CN201320849295U CN203629536U CN 203629536 U CN203629536 U CN 203629536U CN 201320849295 U CN201320849295 U CN 201320849295U CN 203629536 U CN203629536 U CN 203629536U
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China
Prior art keywords
module
transformer
analyser
transformer winding
speed acquisition
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CN201320849295.0U
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Chinese (zh)
Inventor
仇一凡
周兴
李忠晶
鞠登峰
赵殿滨
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State Grid Corp of China SGCC
Beijing State Grid Purui UHV Transmission Technology Co Ltd
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State Grid Corp of China SGCC
Beijing State Grid Purui UHV Transmission Technology Co Ltd
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Priority to CN201320849295.0U priority Critical patent/CN203629536U/en
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Abstract

The utility model relates to a transformer winding analyzer. The transformer winding analyzer is characterized in that: the transformer winding analyzer comprises a CPU, a program memory, a driving signal generation module, a signal amplification module, a power amplification module, a testing clamp, a transformer, a signal modulation module, an A/D high-speed acquisition module, a CPLD module, an FIFO module, and a USB communication module, wherein the CPU, the program memory, the driving signal generation module, the signal amplification module, the power amplification module, the testing clamp, the transformer, the signal modulation module, the A/D high-speed acquisition module, the CPLD module, the FIFO module, and the USB communication module are connected is sequence, and the analyzer is connected with a power supply module. The transformer winding analyzer helps on-site personnel to judge the deformation condition more easily, and provides a new effective method to judge the work state of a winding.

Description

A kind of Transformer Winding analyser
Technical field
The utility model belongs to electric system, specifically relates to a kind of Transformer Winding analyser.
Background technology
Power transformer is as important electrical equipment, and its safe and reliable operation is very important to electric system.Transformer is carried out to winding deformation test, become transformer and be subject to test event important after short-circuit current rush.Domestic application is two kinds of methods below main employing: the one, and frequency response analysis (abbreviation method of frequency response method); The 2nd, low-voltage short circuit impedance method.
Method of frequency response method is to utilize accurate sweep measurement technology, tested winding is applied to the low pressure swept-frequency signal (<10Vp-p) of lkHz~1MHz, measures the frequency response characteristic of winding.If mechanically deform phenomenon has occurred winding, the distribution parameter in equivalent network changes thereupon, and the tuning-points of its amplitude-frequency characteristic curve will change.
When short circuit impedance method rig-site utilization, conventionally add the low-voltage of power frequency in the high pressure winding side of transformer, the short circuit of low pressure winding side, the short-circuit impedance of transformer while measuring power frequency.Short-circuit impedance value is mainly leakage reactance component, is determined by the physical dimension of winding, and the change of transformer winding structure state certainly will cause the variation of transformer leakage reactance, thereby causes the change of Transformer Short Circuit Impedance numerical value.
Method of frequency response method and short circuit impedance method have had successful application experience in deformation of transformer winding test, and obtain certain effect, and relevant standard is also promulgated.But two kinds of methods all respectively have relative merits, to dissimilar deformation sensitive degree difference.Also find in actual applications, some distortion has reflection but not reflection in low-voltage short-circuit impedance in method of frequency response method, and contrary situation also exists.But many distortion have reflection in two kinds of methods, therefore utilize two kinds of methods simultaneously, can effectively reduce erroneous judgement.Generally to utilize two instruments to carry out twice test for this reason, change twice wiring, very take time and effort, bring very big inconvenience to on-the-spot test work.Also exist in addition two kinds of methods all cannot judge the situation of deformation extent.
Utility model content
For the deficiencies in the prior art, the utility model provides a kind of Transformer Winding analyser.Transformer Winding analyser in the utility model, once test can obtain short-circuit impedance curve and the frequency response curve of full frequency band simultaneously, and can utilize machine to carry display screen to show in real time.Novel test equipment is taken into account the advantage of traditional frequency sweep method test macro and low-voltage short-circuit impedance instrument, simultaneously by further analysis, processing to short-circuit impedance frequency curve data, can detect more delicately winding deformation of power transformer situation, make field personnel more easily judge the situation of distortion, judge that for analyzing the duty of winding provides a kind of more effectively new means.
The purpose of this utility model is to adopt following technical proposals to realize:
A kind of Transformer Winding analyser, its improvements are, described analyser comprises CPU, program storage, driving signal generating module, signal amplification module, power amplifier module, testing clamp, transformer, signal condition module, A/D high speed acquisition module, CPLD module, fifo module and usb communication module;
Described CPU, program storage, driving signal generating module, signal amplification module, power amplifier module, testing clamp, transformer, signal condition module, A/D high speed acquisition module, CPLD module, fifo module are connected successively with usb communication module;
Described analyser is connected with power module.
Preferably, described CPU is connected with program storage; For transferring program by program storage, described driving signal generating module produces the sine wave of characteristic frequency.
Preferably, described driving signal generating module is connected successively with signal amplification module, power amplifier module, testing clamp, transformer and signal condition module; The sine wave that described driving signal generating module produces amplifies sine wave by signal amplification module and power amplifier module, and sinusoidal wave turning back to after transformer by testing clamp in two paths of signals conditioning module carried out filtering and suitably amplify it.
Preferably, described signal condition module is connected with fifo module with A/D high speed acquisition module; Being used for nursing one's health rear signal makes it become digital quantity from analog quantity by A/D high speed acquisition module and fifo module to facilitate chip processing.
Preferably, described power module is connected with inner each chip of analyser; For each chip of instrument internal is powered.
Preferably, described CPLD module is connected with A/D high speed acquisition module; For the treatment of the logical operation in A/D high speed acquisition module.
Preferably, described usb communication module is connected with controller; For final process result is outputed to controller.
Compared with the prior art, the beneficial effects of the utility model are:
The Transformer Winding analyser based on frequency sweep method and short circuit impedance method in the utility model is taken into account the advantage of traditional frequency sweep method test macro and low-voltage short-circuit impedance instrument, once test just can obtain Frequency Response and short-circuit impedance family curve, in low-frequency range reaction short-circuit impedance characteristic, has introduced new basis for estimation parameter: Z k/ ω, resistance (R) and reactance (X).Observe the new parameter Z of introducing kthe intensity of variation of twice measurement of relation curve of/ω, resistance (R) and reactance (X) and frequency f, can judge deformation of transformer winding, and the new argument of introduction is judging aspect winding deformation to have higher sensitivity.
And at high band, the utility model can continue again to utilize method of frequency response method to carry out winding deformation analysis to transformer.There is obvious advantage and advance than the simple method of frequency response method that utilizes.
The utility model can make field personnel more easily judge the situation of distortion, judges that the duty of winding provides a kind of more effectively new means for analyzing.
Accompanying drawing explanation
A kind of Transformer Winding analyser schematic diagram that Fig. 1 provides for the utility model.
A kind of Transformer Winding analyser structural drawing that Fig. 2 provides for the utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
A kind of Transformer Winding analyser of the utility model is made up of CPU, program storage, driving signal generating module, signal amplification module, power amplifier module, testing clamp, transformer, signal condition module, A/D high speed acquisition module, CPLD module, fifo module and usb communication module.When the test of Transformer Winding analyser starts, CPU transfers program by program storage, drives signal generating module to produce the sine wave of characteristic frequency.By signal amplification module and power amplifier module, sine wave is amplified, sinusoidal wave turning back to after transformer by testing clamp in two paths of signals conditioning module carried out filtering and suitably amplifies it.Make it become digital quantity from analog quantity through the signal of conditioning by A/D high speed acquisition module and fifo module and facilitate chip processing.
Wherein, power module is responsible for each chip of instrument internal to power.
Wherein, CPLD module is responsible for processing the logical operation in AD sampling.
Wherein, usb communication module is responsible for final process result to output in controller.
Adopt a kind of Transformer Winding analyser of the utility model, can obtain the Transformer Short Circuit Impedance value under 50Hz, compare with name plate rating, judge with reference to low-voltage short-circuit reactance method; The test curve of medium-high frequency section can be compared with former method of frequency response method curve simultaneously, can judge with reference to method of frequency response method, can utilize again impedance-frequecy characteristic curve, resistance-frequecy characteristic curve, reactance-frequecy characteristic curve etc. further to judge simultaneously.
The concrete test of the utility model is: according to the mode of connection of short circuit impedance method, by the secondary short circuit of transformer, apply high-power swept-frequency signal on former limit, by measurement mechanism test and excitation and response signal.Due to Short Circuit Fault on Secondary Transformer, in the time that the swept-frequency signal frequency ratio that drives signal generating module to send is lower, power amplifier module need to be exported larger electric current and power.Along with the raising of the swept-frequency signal frequency that drives signal generating module to send, the effect of the iron core of power transformer weakens gradually.Due to the increase of induction reactance, the output power of the signal source of power amplifier module output is reduced, but the amplitude of this signal large (be method of frequency response method 10 times) can strengthen antijamming capability effectively.
Simultaneously, equipment is furnished with display screen can show test curve at any time, and can further analyze curve data, process, can detect more delicately winding deformation of power transformer situation, make field personnel more easily judge the situation of distortion, judge that for analyzing the duty of winding provides a kind of more effectively new means.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although the utility model is had been described in detail with reference to above-described embodiment, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement embodiment of the present utility model, and do not depart from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of claim scope of the present utility model.

Claims (7)

1. a Transformer Winding analyser, it is characterized in that, described analyser comprises CPU, program storage, driving signal generating module, signal amplification module, power amplifier module, testing clamp, transformer, signal condition module, A/D high speed acquisition module, CPLD module, fifo module and usb communication module;
Described CPU, program storage, driving signal generating module, signal amplification module, power amplifier module, testing clamp, transformer, signal condition module, A/D high speed acquisition module, CPLD module, fifo module are connected successively with usb communication module;
Described analyser is connected with power module.
2. a kind of Transformer Winding analyser as claimed in claim 1, is characterized in that, described CPU is connected with program storage; For transferring program by program storage, described driving signal generating module produces the sine wave of characteristic frequency.
3. a kind of Transformer Winding analyser as claimed in claim 1, is characterized in that, described driving signal generating module is connected successively with signal amplification module, power amplifier module, testing clamp, transformer and signal condition module; The sine wave that described driving signal generating module produces amplifies sine wave by signal amplification module and power amplifier module, and sinusoidal wave turning back to after transformer by testing clamp in two paths of signals conditioning module carried out filtering and suitably amplify it.
4. a kind of Transformer Winding analyser as claimed in claim 1, is characterized in that, described signal condition module is connected with fifo module with A/D high speed acquisition module; Being used for nursing one's health rear signal makes it become digital quantity from analog quantity by A/D high speed acquisition module and fifo module to facilitate chip processing.
5. a kind of Transformer Winding analyser as claimed in claim 1, is characterized in that, described power module is connected with inner each chip of analyser; For each chip of instrument internal is powered.
6. a kind of Transformer Winding analyser as claimed in claim 1, is characterized in that, described CPLD module is connected with A/D high speed acquisition module; For the treatment of the logical operation in A/D high speed acquisition module.
7. a kind of Transformer Winding analyser as claimed in claim 1, is characterized in that, described usb communication module is connected with controller; For final process result is outputed to controller.
CN201320849295.0U 2013-12-20 2013-12-20 Transformer winding analyzer Active CN203629536U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320849295.0U CN203629536U (en) 2013-12-20 2013-12-20 Transformer winding analyzer

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Application Number Priority Date Filing Date Title
CN201320849295.0U CN203629536U (en) 2013-12-20 2013-12-20 Transformer winding analyzer

Publications (1)

Publication Number Publication Date
CN203629536U true CN203629536U (en) 2014-06-04

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Application Number Title Priority Date Filing Date
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106501608A (en) * 2016-10-14 2017-03-15 国网福建省电力有限公司 Error compensation and harmonic elimination device during a kind of reactance measurement
CN107037312A (en) * 2016-11-28 2017-08-11 国家电网公司 A kind of Transformer Winding Building of Simulation Model method for frequency sweep impedance method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106501608A (en) * 2016-10-14 2017-03-15 国网福建省电力有限公司 Error compensation and harmonic elimination device during a kind of reactance measurement
CN106501608B (en) * 2016-10-14 2019-02-22 国网福建省电力有限公司 Error compensation and harmonic elimination device during a kind of reactance measurement
CN107037312A (en) * 2016-11-28 2017-08-11 国家电网公司 A kind of Transformer Winding Building of Simulation Model method for frequency sweep impedance method

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