CN208421127U - A kind of full-automatic transformer winding deformation analyzer - Google Patents
A kind of full-automatic transformer winding deformation analyzer Download PDFInfo
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- CN208421127U CN208421127U CN201820631079.1U CN201820631079U CN208421127U CN 208421127 U CN208421127 U CN 208421127U CN 201820631079 U CN201820631079 U CN 201820631079U CN 208421127 U CN208421127 U CN 208421127U
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Abstract
The utility model discloses a kind of full-automatic transformer winding deformation analyzers, including TMS32OF2812DSP data processing module, phase accumulator and 74HC4046A module, the TMS32OF2812DSP data processing module is in be bi-directionally connected with STM320F103ARM control management module, module occurs for the output end and DDS scanning signal of the TMS32OF2812DSP data processing module, and the output end of DDS scanning signal generation module is connect with the input terminal of transformer winding to be measured, the utility model relates to transformer winding technical fields.The full-automatic transformer winding deformation analyzer judges transformer winding performance information state without can test in the case where hanging cover, dismounting to transformer in maintenance.System stores tested transformer and runs the frequency characteristic data in each stage from dispatching from the factory, being installed to, and by the historical comparison of amplitude-frequency and phase-frequency characteristic curve, obtains the key message inside winding.
Description
Technical field
The utility model relates to transformer winding technical field, specially a kind of full-automatic transformer winding deformation analysis
Instrument.
Background technique
Transformer is in operation by the impact of outlet (near region) short circuit, or during transport, installing, hanging cover overhaul
It is collided when impacting, under the action of electric power and mechanical force, the irreversible variation occurred around packet size, shape is existing
As.It includes that radial directions or the axial dimensions such as body displacement, loose, distortion, bulge, turn-to-turn short circuit occur for transformer winding or iron core
Variation.The serious possible damage with insulating materials, or even insulation rupture are deformed, the generation of Accident of Transformer is in turn resulted in.
The reason of winding deformation, causes the main reason for winding deformation to have:
1, short-circuit current impacts power transformer in the process of running, inevitably by various short troubles
The impact of electric current, especially transformer outlet or near region short trouble, huge short-circuit impact electric current will make transformer winding by
To very big electric power (decades of times when being up is to hundreds times), and winding is made sharply to generate heat.At a higher temperature,
The mechanical strength of conducting wire becomes smaller, and electric power is easier that winding is made to destroy or deform.Short-circuit current impact is transformer winding
The main external cause of deformation.It can be seen that when transformer is impacted by sudden short-circuit current in the process of running, often
A coil is all by the collective effect by powerful radial force and axial force.The form of expression of transformer winding primary fault is most
It shows as interior winding and deformation (especially to auto-transformer) occurs, it is existing that the expendable deformation such as bulge, distortion, displacement occurs
As the canonical form of development is insulation breakdown, breakdown, turn-to-turn short circuit, major insulation electric discharge or breakdown completely between cake then occurs.
2, it transported for long-distance, installing by the unexpected power transformer that collides in transport, during installing or hang cover overhaul
Or during hanging cover, it may be subjected to and unexpectedly collide, jolt and vibrate, lead to winding deformation.
3, protection system has dead zone, and there are dead zones or movement failure can all transformer be caused to bear for movement failure protection system
The time of steady short-circuit current effect is long, and one of the reason of cause deformation of transformer winding failure.Rough Statistics result table
Bright, when by external short circuit, the transformer being damaged because that cannot trip in time accounts for about the 30% of Damage by Short Circuit accident.
4, winding bears short-circuit capacity not enough when short circuit occurs in transformer winding, and meeting cannot withstand short circuit current punching because of it
It hits power and deforms.In recent years, the power transformer accident statistical analysis of national 110kV or more was shown because of winding
Bear short-circuit capacity and not enough have become the primary internal cause of power transformer accident, seriously affect power transformer safety,
Reliability service.
After the mechanically deform of part occurs for transformer winding, internal inductance, capacitance profile parameter necessarily occur relatively
Variation.This is foundation and the basis for carrying out transformer distortion test.Conventional method (such as measurement no-load voltage ratio, straight resistance and capacitor) diagnosis becomes
Whether depressor winding, which deforms, is difficult, because its sensitivity is too low.Hang cover inspection in addition to need to spend a large amount of human and material resources,
Outside financial resources, to judgement inside winding, whether there is or not deformations to be also difficult.
Detection deformation of transformer winding mainly uses short circuit impedance method (SCR), Low Voltage Impulse Method (IvI) both at home and abroad at present
With three kinds of methods of frequency response method (FRA).Since that there is measuring accuracies is low, live anti-dry for short circuit impedance method and Low Voltage Impulse Method
It is poor to disturb ability, the disadvantages of time of measuring is long and poor repeatability.
Utility model content
In view of the deficiencies of the prior art, the utility model provides a kind of full-automatic transformer winding deformation analyzer, solution
The problem of the disadvantages of measuring accuracy of having determined is low, live poor anti jamming capability, and time of measuring is long and poor repeatability.
In order to achieve the above object, the utility model is achieved by the following technical programs: a kind of full-automatic transformer around
Group deformation analysis instrument, including TMS32OF2812DSP data processing module, phase accumulator and 74HC4046A module, it is described
TMS32OF2812DSP data processing module is in be bi-directionally connected with STM320F103ARM control management module, described
Module occurs for the output end and DDS scanning signal of TMS32OF2812DSP data processing module, and module occurs for DDS scanning signal
Output end connect with the input terminal of transformer winding to be measured, the output end of the transformer winding to be measured respectively with frequency-tracking
Circuit, the first signal acquisition adjustment circuit are connected with the input terminal of second signal acquisition adjustment circuit, first signal acquisition
The output end of adjustment circuit is connect with the input terminal of the first AD analog-to-digital conversion, the output end of the second signal acquisition adjustment circuit
It is connect with the input terminal of the 2nd AD analog-to-digital conversion, the output end of the first AD analog-to-digital conversion and the input of the 2nd AD analog-to-digital conversion
End connection, the output end of the frequency tracking circuit and TMS32OF2812DSP data processing module with the first AD analog-to-digital conversion
Input terminal connection, the input terminal of the output end of the frequency tracking circuit and TMS32OF2812DSP data processing module connects
It connects.
Preferably, the output end of the first AD analog-to-digital conversion is connect with the input terminal of the first high speed FIFO, and described second
The output end of AD analog-to-digital conversion is connect with the input terminal of the second high speed FIFO, and the first high speed FIFO and the second high speed FIFO are equal
It is in be bi-directionally connected with TMS32OF2812DSP data processing module.
Preferably, STM320F103ARM control management module respectively with SD card interface, touch screen module, RJ-45 with
Too network interface and RS232 serial ports in being bi-directionally connected, the TMS32OF2812DSP data processing module respectively with FLASH and
For SDRAM in being bi-directionally connected, the STM320F103ARM control management module is in respectively to be bi-directionally connected with FLASH and SDRAM.
Preferably, the input terminal of the phase accumulator inputs respectively phase control words and frequency control word M, the phase
The output end of bit accumulator is connect with the input terminal of ROM sine table, the input terminal and DAC digital analog converter of the ROM sine table
Input terminal connection.
Preferably, the output end of the DAC digital analog converter is connect with the input terminal of LPF low-pass filter, the phase
The input terminal of accumulator and DAC digital analog converter is connect with the output end of FcIK clock source.
Preferably, the input terminal of the output end of the phase comparator in the 74HC4046A module and low-pass filter LF
Connection, the output end of the low-pass filter LF is connect with the input terminal of voltage-controlled vibrator VCO, and voltage-controlled vibrator VCO's is defeated
Outlet output, the output end of the voltage-controlled vibrator VCO are connect with the input terminal of frequency divider 74LS191, the frequency divider
The input terminal of the output end of 74LS191 and phase comparator connects, the input terminal of the phase comparator and high speed photo coupling it is defeated
Outlet connection, the input terminal of the high speed photo coupling are connect with the input terminal of Schmidt trigger CD40106.
Beneficial effect
The utility model provides a kind of full-automatic transformer winding deformation analyzer.Has following beneficial effect, this is complete
Autotransformer winding deformation analyzer, passes through TMS32OF2812DSP data processing module, phase accumulator, 74HC4046A
Module, transformer winding to be measured, frequency-tracking electricity occur for module, STM320F103ARM control management module, DDS scanning signal
Road, the first signal acquisition adjustment circuit, second signal acquisition adjustment circuit, the first AD analog-to-digital conversion, the 2nd AD analog-to-digital conversion, the
One high speed FIFO, the second high speed FIFO, SD card interface, touch screen module, RJ-45 Ethernet interface, RS232 serial ports, FLASH,
SDRAM, phase accumulator, ROM sine table, DAC digital analog converter, LPF low-pass filter, FcIK clock source, 74HC4046A
Module, phase comparator, low-pass filter LF, voltage-controlled vibrator VCO, frequency divider 74LS191, high speed photo coupling and schmidt trigger
Device CD40106, being used in conjunction with each other between element, without being carried out in the case where hanging cover, dismounting just to transformer in maintenance
It can test, judge transformer winding performance information state.It is each from dispatching from the factory, being installed to operation that system stores tested transformer
The frequency characteristic data in stage obtains the key message inside winding by the historical comparison of amplitude-frequency and phase-frequency characteristic curve, discriminates
Not Chu possible winding failure, be widely used in all parts of the country a line maintenance test and scientific research occasion at present.
Detailed description of the invention
Fig. 1 is Tthe utility model system hardware block diagram；
Fig. 2 is the utility model DDS functional block diagram；
Fig. 3 is that the utility model frequency tracking circuit manages block diagram.
In figure: 1-TMS32OF2812DSP data processing module, 2-STM320F103ARM control management module, 3- are to be measured
Module, 5- frequency tracking circuit, the first signal acquisition of 6- adjustment circuit, 7- second occur for transformer winding, 4-DDS scanning signal
Signal acquisition adjustment circuit, the first AD analog-to-digital conversion of 8-, bis- AD analog-to-digital conversion of 9-, the first high speed FIFO of 10-, the second high speed of 11-
FIFO, 12-, 13- touch screen module (13), 14-RJ-45 Ethernet interface, 15-RS232 serial ports, 16-FLASH, 17-
SDRAM, 18-74HC4046A module, 19- low-pass filter LF, 20- Schmidt trigger CD40106,21- high speed photo coupling,
Voltage-controlled vibrator VCO, 24- phase comparator of 22- frequency divider 74LS191,23-, 25- phase accumulator, 26-ROM sine table
(26), 27-DAC digital analog converter, 28-LPF low-pass filter, 29-FcIK clock source.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1-3 is please referred to, the utility model provides a kind of technical solution: a kind of full-automatic transformer winding deformation analysis
Instrument, including TMS32OF2812DSP data processing module 1, phase accumulator 25 and 74HC4046A module 18, tester hardware
By DSP data processing module, DDS swept-frequency signal module, high-speed data acquisition and buffered memory module occur for system, ARM is controlled
The composition such as management module, memory extensive module, touch display module and communication interface, tester use 50 ohm coaxial screens
Cable connection transformer winding to be measured is covered, bottom DSP platform controls DDS swept-frequency signal and module occurs, and is generating specific frequency just
String swept-frequency signal, swept-frequency signal are applied to transformer winding to be measured, and frequency sweep input signal and winding response output signal are by letter
After the processing of number collection modulation module, sampling is synchronized by high-speed ADC chip under the control of frequency tracking module and DSP, is adopted
Sample result is sent into DSP and carries out frequency response calculating and winding deformation analysis, and analysis data are sent to upper layer ARM control through spi bus
Tubulation platform realizes amplitude-frequency response characteristic curve using touch screen and analyzes the display of result, by memory expansion interface,
The storage and playback that data are realized using SD card, are convenient for provided with Ethernet, RS232 communication interface and other equipment networking is opened up
Exhibition, system design are powered using external power supply or rechargeable battery two ways, the convenient use under Different field environment,
TMS32OF2812DSP data processing module 1 and STM320F103ARM control management module 2 is in be bi-directionally connected,
Module 4 occurs for the output end and DDS scanning signal of TMS32OF2812DSP data processing module 1, and mould occurs for DDS scanning signal
The output end of block 4 is connect with the input terminal of transformer winding 3 to be measured, the output end of transformer winding 3 to be measured respectively with frequency with
Track circuit 5, the first signal acquisition adjustment circuit 6 are connected with the input terminal of second signal acquisition adjustment circuit 7, the first signal acquisition
The output end of adjustment circuit 6 is connect with the input terminal of the first AD analog-to-digital conversion 8, and second signal acquires the output end of adjustment circuit 7
It is connect with the input terminal of the 2nd AD analog-to-digital conversion 9, the output end of the first AD analog-to-digital conversion 8 and the input of the 2nd AD analog-to-digital conversion 9
End connection, the output end of frequency tracking circuit 5 and TMS32OF2812DSP data processing module 1 with the first AD analog-to-digital conversion 8
Input terminal connection, the output end of frequency tracking circuit 5 connect with the input terminal of TMS32OF2812DSP data processing module 1,
The output end of first AD analog-to-digital conversion 8 is connect with the input terminal of the first high speed FIFO 10, the output end of the 2nd AD analog-to-digital conversion 9 with
The input terminal of second high speed FIFO 11 connects, and the first high speed FIFO 10 and the second high speed FIFO 11 with
In being bi-directionally connected, STM320F103ARM control management module 2 connects with SD card TMS32OF2812DSP data processing module 1 respectively
Mouth 12, touch screen module 13, RJ-45 Ethernet interface 14 and RS232 serial ports 15 are in be bi-directionally connected, TMS32OF2812DSP number
According to processing module 1 respectively with FLASH16 and SDRAM17 in being bi-directionally connected, STM320F103ARM control management module 2 respectively with
For FLASH16 and SDRAM17 in being bi-directionally connected, the input terminal of phase accumulator 25 inputs respectively phase control words and frequency control
The output end of word M, phase accumulator 25 are connect with the input terminal of ROM sine table 26, the input terminal and DAC number of ROM sine table 26
The input terminal of mode converter 27 connects, and the output end of DAC digital analog converter 27 is connect with the input terminal of LPF low-pass filter 28,
The input terminal of phase accumulator 25 and DAC digital analog converter 27 is connect with the output end of FcIK clock source 29, and AD9851 is issued
The conditioned processing of circuit of swept-frequency signal after be 0V -4V analog sinus signals, use Schmidt with hysteresis characteristic to touch
It sends out device chip CD40106 and shaping is carried out to swept-frequency signal, so that waveform is become the steep same frequency rectangular wave in edge, by adjusting two
A threshold voltage can further eliminate signal noise, in order to further increase the interference free performance of frequency tracking circuit, use
High speed photo coupling TPL521 carries out isolation processing to signal path, and the electrical connection of analog portion and numerical portion is kept apart, is
The voltage magnitude of two-way measured signal can be accurately collected, tester designs each cycle waveform synchronous acquisition 16 at equal intervals
Point, i.e. sampling pulse frequency are 16fs, since the frequency range of swept-frequency signal is 1KHz--IMHz, so the frequency of phaselocked loop
Rate following range is greater than 16KHz---16MHz, and the design selects high speed integrated phase lock chip 74HC4046A, which exists
When+5V power voltage supply, running frequency is up to 18MHz, meets the needs of the design, chip 74HC4046A is by phase comparator PD
It is formed with voltage controlled oscillator VCO, in order to constitute complete phase-locked loop circuit, tester selects the conduct of RC passive low-pass filter circuit
Loop filter LF selects synchronous hexadecimal up/down counter chip 74LSl91 as frequency divider, defeated to voltage controlled oscillator
Signal carries out 16 frequency dividings out, and due to the real-time tracking of phaselocked loop, when frequency swept signal variation, circuit can automatically track lock
It is fixed that [351, meeting output frequency always is 16 times of inputs frequencies, i.e. fo=16fs, so that it is real to control subsequent A/D analog-digital converter
Existing 16 points of complete cycle wave equal interval sampling, while the input capture pin of the task manager EV module of sampling pulse access DSP, from
And realize measurement of the DSP to frequency swept signal, the output end and low pass filtered of the phase comparator 24 in 74HC4046A module 18
The input terminal of wave device LF19 connects, and the output end of low-pass filter LF19 is connect with the input terminal of voltage-controlled vibrator VCO23, and
The output end of voltage-controlled vibrator VCO23 exports, the output end of voltage-controlled vibrator VCO23 and the input terminal of frequency divider 74LS19122
Connection, the output end of frequency divider 74LS19122 connect with the input terminal of phase comparator 24, the input terminal of phase comparator 24 and
The output end of high speed photo coupling 21 connects, and the input terminal of high speed photo coupling 21 and the input terminal of Schmidt trigger CD4010620 connect
It connects.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (6)
1. a kind of full-automatic transformer winding deformation analyzer, including TMS32OF2812DSP data processing module (1), phase are tired
Add device (25) and 74HC4046A module (18), it is characterised in that: the TMS32OF2812DSP data processing module (1) with
STM320F103ARM control management module (2) in being bi-directionally connected, the TMS32OF2812DSP data processing module (1) it is defeated
Module (4) occur for outlet and DDS scanning signal, and the output end of DDS scanning signal generation module (4) and transformer winding to be measured
(3) input terminal connection, the output end of the transformer winding (3) to be measured are adopted with frequency tracking circuit (5), the first signal respectively
Collection adjustment circuit (6) is connected with the input terminal of second signal acquisition adjustment circuit (7), the first signal acquisition adjustment circuit
(6) output end is connect with the input terminal of the first AD analog-to-digital conversion (8), the output of second signal acquisition adjustment circuit (7)
End is connect with the input terminal of the 2nd AD analog-to-digital conversion (9), and the output end and the 2nd AD modulus of the first AD analog-to-digital conversion (8) turn
Change the input terminal connection of (9), the output end of the frequency tracking circuit (5) and TMS32OF2812DSP data processing module (1)
It is connect with the input terminal of the first AD analog-to-digital conversion (8), the output end and TMS32OF2812DSP of the frequency tracking circuit (5)
The input terminal of data processing module (1) connects.
2. a kind of full-automatic transformer winding deformation analyzer according to claim 1, it is characterised in that: the first AD
The output end of analog-to-digital conversion (8) is connect with the input terminal of the first high speed FIFO (10), the output of the 2nd AD analog-to-digital conversion (9)
End is connect with the input terminal of the second high speed FIFO (11), and the first high speed FIFO (10) and the second high speed FIFO (11) with
TMS32OF2812DSP data processing module (1) is in be bi-directionally connected.
3. a kind of full-automatic transformer winding deformation analyzer according to claim 1, it is characterised in that: described
STM320F103ARM control management module (2) respectively with SD card interface (12), touch screen module (13), RJ-45 Ethernet interface
(14) and RS232 serial ports (15) is in being bi-directionally connected, the TMS32OF2812DSP data processing module (1) respectively with FLASH
(16) and SDRAM (17) is in being bi-directionally connected, STM320F103ARM control management module (2) respectively with FLASH (16) and
SDRAM (17) is in be bi-directionally connected.
4. a kind of full-automatic transformer winding deformation analyzer according to claim 1, it is characterised in that: the phase is tired
Adding the input terminal of device (25) to input respectively has phase control words and frequency control word M, the output end of the phase accumulator (25)
It is connect with the input terminal of ROM sine table (26), the input terminal of the ROM sine table (26) is defeated with DAC digital analog converter (27)
Enter end connection.
5. a kind of full-automatic transformer winding deformation analyzer according to claim 4, it is characterised in that: the DAC number
The output end of mode converter (27) is connect with the input terminal of LPF low-pass filter (28), the phase accumulator (25) and DAC number
The input terminal of mode converter (27) is connect with the output end of FcIK clock source (29).
6. a kind of full-automatic transformer winding deformation analyzer according to claim 1, it is characterised in that: described
The output end of phase comparator (24) in 74HC4046A module (18) is connect with the input terminal of low-pass filter LF (19), institute
The output end for stating low-pass filter LF (19) is connect with the input terminal of voltage-controlled vibrator VCO (23), and voltage-controlled vibrator VCO (23)
Output end output, the output end of the voltage-controlled vibrator VCO (23) connect with the input terminal of frequency divider 74LS191 (22), institute
The output end for stating frequency divider 74LS191 (22) is connect with the input terminal of phase comparator (24), the phase comparator (24)
Input terminal is connect with the output end of high speed photo coupling (21), the input terminal and Schmidt trigger of the high speed photo coupling (21)
The input terminal of CD40106 (20) connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820631079.1U CN208421127U (en) | 2018-04-28 | 2018-04-28 | A kind of full-automatic transformer winding deformation analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820631079.1U CN208421127U (en) | 2018-04-28 | 2018-04-28 | A kind of full-automatic transformer winding deformation analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208421127U true CN208421127U (en) | 2019-01-22 |
Family
ID=65117521
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820631079.1U Expired - Fee Related CN208421127U (en) | 2018-04-28 | 2018-04-28 | A kind of full-automatic transformer winding deformation analyzer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110823140A (en) * | 2019-11-11 | 2020-02-21 | 华滋奔腾（苏州）安监仪器有限公司 | Demodulator and demodulation method based on frequency mixer and power detector strain sensor |
| CN111856343A (en) * | 2019-12-27 | 2020-10-30 | 广东电网有限责任公司电力科学研究院 | Transformer winding deformation analysis method, device, equipment and storage medium |
| CN113702877A (en) * | 2021-09-09 | 2021-11-26 | 杭州电力设备制造有限公司 | Transformer winding turn-to-turn short circuit detection device |
-
2018
- 2018-04-28 CN CN201820631079.1U patent/CN208421127U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110823140A (en) * | 2019-11-11 | 2020-02-21 | 华滋奔腾（苏州）安监仪器有限公司 | Demodulator and demodulation method based on frequency mixer and power detector strain sensor |
| CN110823140B (en) * | 2019-11-11 | 2021-04-30 | 华滋奔腾（苏州）安监仪器有限公司 | Demodulator and demodulation method based on frequency mixer and power detector strain sensor |
| CN111856343A (en) * | 2019-12-27 | 2020-10-30 | 广东电网有限责任公司电力科学研究院 | Transformer winding deformation analysis method, device, equipment and storage medium |
| CN111856343B (en) * | 2019-12-27 | 2021-06-29 | 广东电网有限责任公司电力科学研究院 | Transformer winding deformation analysis method, device, equipment and storage medium |
| CN113702877A (en) * | 2021-09-09 | 2021-11-26 | 杭州电力设备制造有限公司 | Transformer winding turn-to-turn short circuit detection device |
| CN113702877B (en) * | 2021-09-09 | 2024-03-26 | 杭州电力设备制造有限公司 | Transformer winding turn-to-turn short circuit detection device |
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