CN207149352U - Transformer demagnetization instrument with remanent magnetism quantitative analysis function - Google Patents
Transformer demagnetization instrument with remanent magnetism quantitative analysis function Download PDFInfo
- Publication number
- CN207149352U CN207149352U CN201720790007.7U CN201720790007U CN207149352U CN 207149352 U CN207149352 U CN 207149352U CN 201720790007 U CN201720790007 U CN 201720790007U CN 207149352 U CN207149352 U CN 207149352U
- Authority
- CN
- China
- Prior art keywords
- unit
- current
- remanent magnetism
- output
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005389 magnetism Effects 0.000 title claims abstract description 72
- 230000005347 demagnetization Effects 0.000 title claims abstract description 59
- 238000004445 quantitative analysis Methods 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 49
- 238000006243 chemical reaction Methods 0.000 claims abstract description 48
- 238000004458 analytical method Methods 0.000 claims abstract description 38
- 238000012360 testing method Methods 0.000 claims abstract description 37
- 238000005259 measurement Methods 0.000 claims abstract description 22
- 238000004804 winding Methods 0.000 claims abstract description 9
- 230000006870 function Effects 0.000 claims description 20
- 230000005540 biological transmission Effects 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000013016 damping Methods 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 230000010287 polarization Effects 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims 1
- 238000003860 storage Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000000306 component Substances 0.000 description 3
- 201000004569 Blindness Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000005291 magnetic effect Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The utility model discloses a kind of transformer demagnetization instrument with remanent magnetism quantitative analysis function, and it includes instrument power source system, test connection system, variable DC power supply output system, remanent magnetism quantified system analysis and control system；The voltage magnitude of the instrument power source system is 220V ± 10%, frequency 50Hz；The instrument power source system includes power conversion unit；The test connection system is the p-wire and binding post that instrument connects Transformer Winding part；The variable DC power supply output system exports a certain size DC current, demagnetization is carried out to transformer by current rectification inversion；The remanent magnetism quantified system analysis is to receive that each DC current is positive and negative to be filled with the signal fed back after winding by testing connection system, and remanent magnetism amount is quantified；Also include the display unit for being used for showing remanent magnetism amount.The control system includes control collecting unit and analysis expert unit；The remanent magnetism quantified system analysis includes AC signal source unit, measurement output unit, alternating current detection unit, alternating voltage detection unit.
Description
Technical field
Transformer demagnetization technical field is the utility model is related to, is eliminated specifically for the remanent magnetism of transformer.
Background technology
Power transformer is one of capital equipment of transmission distribution electric energy in power system, is undertaken a certain voltage change phase
The effect of the different voltage of same another or several numerical value.With the development of power network, transformer capacity is increasing, inside it
Structure also becomes increasingly complex.Carry out delivery test in manufactory to ensure the quality of finished product, carry out during installation commissioning test with
Ensure mounting process quality, routine test is carried out in operation to prevent to occur to carry out checkout facility after accident and failure to search
Defect.In high-potting, test direct current flow resistance is one of indispensable project, the situation of change energy according to DC resistance
Easily and accurately judge that transformer current link circuit is to check transformer electricity with the presence or absence of failures such as short circuit, weld defects
Flow back to the effective way of road connection state.During actual test in order to shorten test period and improve measurement accuracy, Chang Cai
D.C. resistance test is carried out with instrument for measuring DC resistance, the maximum direct current gear of instrument for measuring DC resistance output is respectively
5A、10A、20A.40A has been even up to, and large-scale power transformer iron core is due to using low-loss silicon steel sheet and Multi joint work
Skill, its no-load current general control is below 0.1% or so.The peak value of exciting current is about lA or so, the direct current of experiment
Stream is more than several times even more than tens times of normal exciting current, therefore D.C. resistance test necessarily makes transformer core serious
Saturation and produce remanent magnetism.
It is, in general, that dc magnetization number of ampere turns is bigger, remanent magnetism is more serious, and the basic reason of remanent magnetism is the intrinsic of ferromagnetic material
Hysteresis.The harm of remanent magnetism is mainly manifested in no-load transformer Switching impulse moment under rated voltage and causes transformer core fast
Fast height saturation and produce larger exciting current, the 80 of transformer normal steady state exciting current (no-load current) value can be reached
One 100 times again, equivalent to 6 times~8 times of rated current, so big exciting current may cause overcurrent, grave gas etc. to be protected
Protection unit malfunctions, and transformer is put into operation unsuccessfully；Induce operating transformer in neighbouring transformer station and produce " and echo surge current " and false tripping
Lock.Cause large-area power-cuts；Switching overvoltage is produced, damages electrical equipment；Cause line voltage and frequency fluctuation, influence other
Electrical equipment normal work；Exciting current includes a large amount of harmonic waves, causes the quality of power supply seriously to pollute；Increase leakage field, cause gold
Belong to structure and fuel tank overheat：Hot-spot can also cause insulating paper aging or transformer oil to decompose and influence the life-span of transformer.Cause
This transformer core remanent magnetism size not only has influence on the safe for operation of itself, and has influence on the stabilization of power system, safety fortune
OK.Based on above reason.It is very necessary to carry out remanent magnetism amount detection after the test of transformer each D.C. resistance, and take and have conscientiously
The measure of effect eliminates or reduced remanent magnetism amount unshakable in one's determination.
At present, transformer demagnetization instrument is most of using to the positive and negative D.C. resistance for being passed through a certain size of winding, passes through
Residual magnetic flux reaches demagnetization purpose to direct current in offset winding repeatedly.But due to the function of no remaining quantity of magnetism of monitoring, exist certain
Blindness, remanent magnetism may be caused to eliminate insufficient situation and occurred.
Utility model content
Technical problem to be solved in the utility model is to be directed to above-mentioned deficiency of the prior art, there is provided one kind has
The transformer demagnetization instrument of remanent magnetism quantitative analysis function, its alternating current and ac voltage signal for being detected by detection unit,
It is final to calculate and show remanent magnetism amount.Can have traditional demagnetization instrument demagnetization function, and can monitor in real time in transformer remanent magnetism amount so as to
Decide whether to continue demagnetization, improve the reliability of work, reduce and put into operation the risk that transformer causes the accident with remanent magnetism.
Technical scheme is used by the utility model solves its technical problem：
Transformer demagnetization instrument with remanent magnetism quantitative analysis function, comprising instrument power source system, test connection system, variable
Dc source output system, remanent magnetism quantified system analysis and control system；
The voltage magnitude of the instrument power source system is 220V ± 10%, frequency 50Hz；The instrument power source system bag
Containing power conversion unit；
The test connection system is the p-wire and binding post that instrument connects Transformer Winding part；
The variable DC power supply output system exports a certain size DC current, to becoming by current rectification inversion
Depressor carries out demagnetization；
The remanent magnetism quantified system analysis is after receiving that each DC current is positive and negative and be filled with winding by testing connection system
The signal of feedback, remanent magnetism amount is quantified；
Also include the display unit for being used for showing remanent magnetism amount.
The control system includes control collecting unit and analysis expert unit；
The remanent magnetism quantified system analysis include AC signal source unit, measurement output unit, alternating current detection unit,
Alternating voltage detection unit；The AC400V output ends of the input connection power conversion unit of AC signal source unit, exchange letter
The output end of number source unit connects measurement output unit, alternating current detection unit and alternating voltage detection unit respectively：Measurement
Output unit is connected to the low-pressure end of transformer；Alternating current detection unit connects control with alternating voltage detection unit output end
Collecting unit；The control output end of collecting unit, measurement signal output end is controlled to be connected respectively to AC signal source unit and specially
Family's analytic unit.
As a kind of preferred embodiment of the present utility model：The control system includes control panel, the control panel bag
It is described containing controller unit, A/D modular converters, power module, SDRAM memory, FLASH memory and data transmission module
STM32 chips are installed, the remanent magnetism quantified system analysis is connected with A/D modular converters, the A/D conversions in controller unit
Module and power module are all connected with controller unit, and the SDRAM memory, FLASH memory and data transmission module are all
It is connected with controller unit, display unit is connected with data transmission module.
As a kind of preferred embodiment of the present utility model：It is provided with A/D modular converters in described control panel
ADS8344 chips.
As a kind of preferred embodiment of the present utility model：The electric current of the variable DC power supply output system output is big
It is small to select tetra- gears of 5A, 1A, 200mA, 5mA.
As a kind of preferred embodiment of the present utility model：Controller unit is using the embedded place that declines on the control panel
Manage device module；The STM32 chips of TI companies are installed in controller unit；The chips of DSP 2812 are also included in controller unit；
CC2530 wireless communication modules are additionally provided with the control panel.
As a kind of preferred embodiment of the present utility model：The input of the power conversion unit is connected to AC
220V, output end are connected to the power end of other each active cells in instrument；+ 5V the direct-current power supplies of power conversion unit
Control collecting unit and analysis expert unit；± 12V DC power supply supply the display unit and test report of power conversion unit
Output unit；+ 15V direct-current power supply alternating currents the detection unit of power conversion unit, alternating voltage detection unit, decay
Frequency variation signal current detecting unit, decay frequency variation signal voltage detection unit：± 96V the direct-current power supplies of power conversion unit
Variable dc electric current signal element：The 400V AC powers supply AC signal source unit of power conversion unit.
As a kind of preferred embodiment of the present utility model：The variable DC power supply output system includes dc-decay
Frequency conversion electric current signal element, decay frequency variation signal current detecting unit, decay frequency variation signal voltage detection unit and demagnetization output
Unit.± 96V the output ends of the input termination power conversion unit of dc-decay frequency conversion electric current signal element；Dc-decay frequency conversion
The output end of current signal unit and the input of demagnetization output unit, decay frequency variation signal current detecting unit, decay frequency conversion
Signal voltage detection unit is connected；The output end of demagnetization output unit is connected to the step-up side being unmagnetized；Decay frequency conversion
Signal code detection unit connects control collecting unit with the output end of decay frequency variation signal voltage detection unit；Control collection is single
The control output end of member, signal output part are connected respectively to dc-decay frequency conversion electric current signal element and analysis expert unit.
As a kind of preferred embodiment of the present utility model：The dc-decay frequency conversion electric current signal element includes order
Constant-current source, gain control unit, the polarization converting unit of connection；The electric current output gear of collecting unit selection constant-current source is controlled,
Make its periodic damping, ensure that each gear amplitude is sequentially reduced 5%；Control collecting unit controls gain control unit to increase simultaneously
The size of benefit, it is ensured that the current amplitude of each gear output is linearly gradually to decay to zero from maximum：Control collecting unit
Also control polarity converting unit makes the positive-negative polarity of direct current be switched over according to certain frequency cycle simultaneously, it is ensured that demagnetization
The dc erasing signal of output unit output reaches dc-decay and becomes yupin effect.
The utility model has advantages below compared with prior art：
The disclosed transformer demagnetization instrument with remanent magnetism quantitative analysis function of the utility model, it is detected using detection unit
The alternating current and ac voltage signal arrived, it is final to calculate remanent magnetism amount.There can be traditional demagnetization instrument demagnetization function, and can is supervised in real time
Remanent magnetism amount in transformer is surveyed, so as to decide whether to continue demagnetization, to improve the reliability of work, reduce band remanent magnetism and put into operation
The risk that transformer causes the accident.Demagnetization instrument of the present utility model is convenient, fast, stably, reliably, improves the effect of service work
Rate and accuracy, it ensure that the safe operation of power network.
Brief description of the drawings
Fig. 1 is a kind of use state diagram of embodiment of the present utility model；
Fig. 2 is a kind of front appearance figure of embodiment of the present utility model；
Fig. 3 is a kind of circuit theory diagrams of embodiment of the present utility model；
Description of reference numerals：
1- power conversion units, 2- AC signal source units, 3- measurement output units, 4- alternating current detection units, 5-
Alternating voltage detection unit, 6- control collecting units, 7- human-computer dialogue units, 8- variable dc electric current signal elements, 9- decay
Frequency variation signal current detecting unit, 10- decay frequency variation signal voltage detection units, 11- display units, 12- analysis expert units,
13- test report output units, 14- demagnetization output units.
Embodiment
Below in conjunction with the accompanying drawings and embodiment describes the utility model embodiment：
Referring to Fig. 1~Fig. 3, generally, the disclosed transformer demagnetization with remanent magnetism quantitative analysis function of the utility model
Instrument includes instrument power source system, test connection system, variable DC power supply output system, remanent magnetism quantified system analysis, control system
5 parts such as system.
The instrument power source system inputs from instrumentation panel as depicted in figs. 1 and 2, there is provided instrument is (for the side of description
Just, by the abbreviation of " instrument " as " demagnetization instrument " in specification) normal work power-supply system, the voltage magnitude of instrument power source system
For 220V ± 10%, frequency 50Hz；The test connection system be instrument connect Transformer Winding part p-wire and
Binding post；The variable DC power supply output system exports a certain size DC current, to becoming by current rectification inversion
Depressor carries out demagnetization；The remanent magnetism quantified system analysis be by test connection system receive each DC current it is positive and negative be filled with around
The signal fed back after group, remanent magnetism amount is quantified, come out remanent magnetism amount digitized representations by screen unit；Control system pair
Other four systemses are integrated, uniformly combine control, and required function is selected, and reach test objective.
Control system of the present utility model includes control panel, the control panel include controller unit, A/D modular converters,
Power module, SDRAM memory, FLASH memory and data transmission module, STM32 cores are installed in the controller unit
Piece, the remanent magnetism quantified system analysis are connected with A/D modular converters, the A/D modular converters and power module all with controller
Unit connects, and the SDRAM memory, FLASH memory and data transmission module are all connected with controller unit, display unit
It is connected with data transmission module.
ADS8344 chips are installed in A/D modular converters in above-mentioned control panel.
The size of current of variable DC power supply output system output of the present utility model can select 5A, 1A, 200mA, 5mA
Four gears, go for the voltage transformer of different voltage class.
Controller unit uses embedded microprocessor module on control panel of the present utility model, and controller unit is control
The core component of plate, possess powerful data processing and port controlling function.Current best performance is installed in controller unit
Good 32-bit number signal processing chip, the STM32 chips of TI companies, and according to the well-designed core of its feature and periphery electricity
Road, sufficient extension is carried out to DSP 2812 function and has reserved corresponding Function Extension interface, has ensured data processing just
True property.
Remanent magnetism quantified system analysis is critical component of the present utility model, in order to it is real-time, will accurately collect
The controller of signal transmission, the utility model are also communicated wirelessly using CC2530 wireless communication modules, this wireless telecommunications mould
Block has 3 passages, and is transceiver, and data transmit-receive automatic conversion, conversion time is short, automatic fitration space electric field magnetic field
Interference, long-term use of good reliability, fault rate is extremely low, meets the requirement in the measurement device, ensure that the accuracy of data.
The utility model can be equipped with reliable operating system in actual practicality, instrument, C Plus Plus can be utilized to program
Operating system, the data for testing to obtain from test connecting line using receiving module reception, is calculated upper by remanent magnetism quantitative system
Position machine shows Date of residual magnetism.
The utility model has remanent magnetism quantitative analysis functional transformer demagnetization instrument convenient, fast, stably, reliably, improves
The efficiency and accuracy of service work, ensure that the safe operation of power network.
The shortcomings that whether demagnetization is complete can not be judged for current alternating current-direct current demagnetization method for the utility model, to the remanent magnetism amount of progress
Change, alternating current 220V voltage conversion is differed into 120 ° of 400V voltages into 3 phase angles is added to step down side with regard to measurable remanent magnetism
Number.There is dc-decay frequency conversion degaussing gear simultaneously, alternating current 220V is converted into DC current source, it is straight by automatically controlling
Stream current source positive-negative polarity changes according to fixed frequency and its amplitude is as change in polarity decays 5% every time.From big to small according to
It is secondary that demagnetization is carried out to high voltage side of transformer.
To sum up, the utility model possesses following advantage：
(1) output DC current is can adjust, adapts to different voltage class transformer degaussing operations；
(2) based on input no-load current theoretical value or delivery test value, with reference to the alternating current and alternating voltage detected
Signal, the size of Analysis ofremanence element analysis no-load current and the accurate measuring transformer remanent magnetism of harmonic content after treatment,
Eliminating transformer remanent magnetism electric current can be stablized；
(3) because remanent magnetism amount determines, remanent magnetism can be eliminated faster compared to conventional blindness degaussing instruments.
As shown in figure 3, it illustrates a specific embodiment of the present utility model,
As shown in figure 3, in the present embodiment, power-supply system only includes power conversion unit l.The input of power conversion unit
AC 220V are connected to, output end is connected to the power end of other units in instrument of the present utility model, power conversion unit
Effect be that AC 220V are converted into working power needed for unit, ensure other active cell normal works, such as+5V
Direct-current power supply controls collecting unit 6 and analysis expert unit 12；± 12V DC power supply supplies display unit ll and experiment is reported
Accuse output unit 13；+ 15V direct-current power supply alternating currents detection unit 4, alternating voltage detection unit 5, decay frequency variation signal
Current detecting unit 9, decay frequency variation signal voltage detection unit 10：± 96V direct-current power supply variable dc electric current signal lists
Member 8：400V AC powers supply AC signal source unit 2.
In the present embodiment, control system includes control collecting unit and analysis expert unit；Remanent magnetism quantified system analysis bag
Source unit containing AC signal 2, measurement output unit 3, alternating current detection unit 4, alternating voltage detection unit 5.AC signal
The input of source unit 2 connects the AC400V output ends of power conversion unit 1, and the output end of AC signal source unit 2 connects survey respectively
Measure output unit 3, alternating current detection unit 4 and alternating voltage detection unit 5：Measurement output unit 3 is connected to transformer
Low-pressure end；Alternating current detection unit 4 connects control collecting unit 6 with the output end of alternating voltage detection unit 5；Control collection is single
The control output end of member 6, measurement signal output end are connected respectively to AC signal source unit 2 and analysis expert unit 12.One
In kind specific embodiment, (how much refer to remanent magnetism amount existing for measuring transformer) after tester selects " measurement " working condition,
Control collecting unit 6 requires tester's input transformer no-load current by analysis expert unit 12 by the prompting of display unit 11
Theoretical value or delivery test value, analysis expert unit 12 are recorded and prompt to enter measurement of residual magnetism work.
In certain embodiments, when the utility model enters measurement work, the control control exchange letter of collecting unit 6
Number source unit 2 exports the 400V AC measurment signals that three phase angle differences are 120 °, is carried to be unmagnetized the work of the measurement of residual magnetism of transformer
For signal source.After the AC measurment signal that AC signal source unit 2 exports is by measuring the progress overcurrent-overvoltage processing of output unit 3
It is applied to the step-down side being unmagnetized.At this moment alternating current detection unit 4 and alternating voltage detection unit 5 are to AC signal
The AC measurment signal that source unit 2 exports is detected, and detected alternating current and ac voltage signal are transmitted into control
Collecting unit 6 processed, size and harmonic content that analysis expert unit 12 analyzes no-load current are sent to after treatment.Again with
No-load current theoretical value or delivery test the value contrast above inputted, and the size of even-order harmonic component calculate remanent magnetism amount,
And the erasing current what gear we should select is prompted to carry out demagnetization, also survey can be exported by test report output unit 13
Amount report.Analysis expert unit is performed using existing program meanses and program using dsp chip as hardware foundation and calculates and compare
Process.
In certain embodiments, variable DC power supply output system includes dc-decay frequency conversion electric current signal element
(i.e. variable dc electric current signal element in Fig. 3), decay frequency variation signal current detecting unit 9, the voltage inspection of decay frequency variation signal
Survey unit 10 and demagnetization output unit 14.The input termination power conversion unit 1 of dc-decay frequency conversion electric current signal element 8 ±
96V output ends.The output end of dc-decay frequency conversion electric current signal element and the input of demagnetization output unit 14, decay frequency conversion letter
Number current detecting unit 9, decay frequency variation signal voltage detection unit 10 are connected；The output end of demagnetization output unit 14 be connected to by
The step-up side of demagnetization；Decay frequency variation signal current detecting unit 9 and the defeated of frequency variation signal voltage detection unit 10 of decaying
Go out end connection control collecting unit 6；The control output end of collecting unit 6, signal output part is controlled to be connected respectively to dc-decay
Frequency conversion electric current signal element 8 and analysis expert unit 12.
Dc-decay frequency conversion electric current signal element is the chief component of dc-decay frequency conversion current system.Including order
Constant-current source 15, gain control unit 16, its theory structure of polarization converting unit 17. of connection are as shown in Figure 3.Effect is to produce just
The direct current that negative polarity is changed by fixed frequency and amplitude is gradually reduced.Collecting unit 6 is controlled to select the electric current output of constant-current source 15
Gear, make its periodic damping, ensure that each gear amplitude is sequentially reduced 5%；Control collecting unit 6 controls gain to control simultaneously
The size of the gain of unit 16, it is ensured that the current amplitude of each gear output is linearly gradually to decay to zero from maximum：Control
Also control polarity converting unit 17 makes the positive-negative polarity of direct current be cut according to certain frequency cycle to collecting unit 6 simultaneously
Change, it is ensured that the dc erasing signal that demagnetization output unit 14 exports reaches dc-decay and becomes yupin effect.In some specific embodiments
In, after tester selects " demagnetization " working condition, control collecting unit 6 controls dc-decay frequency conversion electric current signal element defeated
Go out dc-decay frequency conversion electric current demagnetization signal.Overcurrent-overvoltage guarantor is carried out to dc-decay frequency variation signal by demagnetization output unit 14
The power transformer high-pressure side being unmagnetized is connected to after shield.Purpose is to give the transformer being unmagnetized one optimal demagnetization signal.
It is straight to be respectively used to detection for decay frequency variation signal current detecting unit 9 and decay frequency variation signal voltage detection unit 10 in degaussing process
The electric current and voltage signal that stream decay becomes in the dc-decay frequency variation signal of frequency source output, and control collecting unit 6 is transmitted to, it is used for
A feedback signal is provided to dc-decay frequency conversion electric current signal element.Ensure what dc-decay frequency conversion electric current signal element was exported
Dc-decay frequency conversion demagnetization signal normal table.The data that control collecting unit 6 is gathered are sent to expert point after treatment
Unit 12 is analysed, analysis expert unit 12 is carried out by the data (electric current, the voltage signal of decay frequency variation signal) to being collected
Analysis, and opposed with the setting data (the corresponding preset data set in a device before demagnetization) that human-computer dialogue unit 7 is inputted
Than, control and judge demagnetization progress, if degaussing process terminates, it will automatically be discharged and carry out measurement of residual magnetism work.When
After measurement of residual magnetism end-of-job, analysis expert unit 12 is carried out analyzing judgement and transmitted to display unit to remanent magnetism test result
11.The gear for prompting tester's selective erase electric current by display unit 11 continues next step degaussing operation, be such as not required to after
Continuous demagnetization then prompts whether to export test report.Device operation control system includes human-computer dialogue unit 7, display unit 11, examination
Test report output unit 13.Human-computer dialogue unit 7 is connected with control collecting unit 6, and display unit 1l and test report output are single
Member 13 is connected with analysis expert unit 12.Human-computer dialogue unit 7 is mainly that tester sets in test to device progress parameter
Put, data input and order confirm etc. operation：Display unit 11 is mainly used to show that tester passes through human-computer dialogue unit 7
The operation note carried out and the degaussing process of device and result：The effect of test report output unit 13 be measurement of residual magnetism with
Demagnetization terminates rear tester makes it export or print test report by operating man-machine dialog unit 7.
The utility model preferred embodiment is explained in detail above in conjunction with accompanying drawing, but the utility model is not limited to
Above-mentioned embodiment, in those of ordinary skill in the art's possessed knowledge, the utility model can also not departed from
Made a variety of changes on the premise of objective.
Many other changes and remodeling can be made by not departing from spirit and scope of the present utility model.It should be appreciated that this reality
Specific embodiment is not limited to new, the scope of the utility model is defined by the following claims.
Claims (8)
1. the transformer demagnetization instrument with remanent magnetism quantitative analysis function, it is characterised in that：Include instrument power source system, test connection
System, variable DC power supply output system, remanent magnetism quantified system analysis and control system；
The voltage magnitude of the instrument power source system is 220V ± 10%, frequency 50Hz；The instrument power source system includes electricity
Source converting unit；
The test connection system is the p-wire and binding post that instrument connects Transformer Winding part；
The variable DC power supply output system exports a certain size DC current, to transformer by current rectification inversion
Carry out demagnetization；
The remanent magnetism quantified system analysis is to be fed back after receiving that each DC current is positive and negative and be filled with winding by testing connection system
Signal, remanent magnetism amount is quantified；
Also include the display unit for being used for showing remanent magnetism amount；
The control system includes control collecting unit and analysis expert unit；
The remanent magnetism quantified system analysis includes AC signal source unit, measurement output unit, alternating current detection unit, exchange
Voltage detection unit；The AC400V output ends of the input connection power conversion unit of AC signal source unit, alternating message source
The output end of unit connects measurement output unit, alternating current detection unit and alternating voltage detection unit respectively：Measurement output
Unit is connected to the low-pressure end of transformer；Alternating current detection unit connects control collection with alternating voltage detection unit output end
Unit；The control output end of collecting unit, measurement signal output end is controlled to be connected respectively to AC signal source unit and expert point
Analyse unit.
2. there is the transformer demagnetization instrument of remanent magnetism quantitative analysis function as claimed in claim 1, it is characterised in that：The control
System includes control panel, the control panel include controller unit, A/D modular converters, power module, SDRAM memory,
FLASH memory and data transmission module, STM32 chips, the remanent magnetism quantitative analysis system are installed in the controller unit
System is connected with A/D modular converters, and the A/D modular converters and power module are all connected with controller unit, the SDRAM storages
Device, FLASH memory and data transmission module are all connected with controller unit, and display unit is connected with data transmission module.
3. there is the transformer demagnetization instrument of remanent magnetism quantitative analysis function as claimed in claim 2, it is characterised in that：Described control
ADS8344 chips are installed in A/D modular converters in making sheet.
4. there is the transformer demagnetization instrument of remanent magnetism quantitative analysis function as claimed in claim 1, it is characterised in that：It is described variable
The size of current of dc source output system output can select tetra- gears of 5A, 1A, 200mA, 5mA.
5. there is the transformer demagnetization instrument of remanent magnetism quantitative analysis function as claimed in claim 2, it is characterised in that：The control
Controller unit uses embedded microprocessor module on plate；The STM32 chips of TI companies are installed in controller unit；Control
The chips of DSP 2812 are also included in device unit；CC2530 wireless communication modules are additionally provided with the control panel.
6. there is the transformer demagnetization instrument of remanent magnetism quantitative analysis function as claimed in claim 1, it is characterised in that：The power supply
The input of converting unit is connected to AC 220V, and output end is connected to the power end of other each active cells in instrument；Power supply
+ 5V direct-current power supplies control the collecting unit and analysis expert unit of converting unit；± 12V DC the electricity of power conversion unit
Source supplies display unit and test report output unit；+ 15V direct-current power supplies alternating current the detection of power conversion unit is single
Member, alternating voltage detection unit, decay frequency variation signal current detecting unit, decay frequency variation signal voltage detection unit：Power supply turns
Change ± 96V direct-current power supply variable dc electric current the signal elements of unit：The 400V AC powers supply of power conversion unit
AC signal source unit.
7. there is the transformer demagnetization instrument of remanent magnetism quantitative analysis function as claimed in claim 1, it is characterised in that：It is described variable
Dc source output system includes dc-decay frequency conversion electric current signal element, decay frequency variation signal current detecting unit, decay change
Frequency signal voltage detection unit and demagnetization output unit, the input termination Power convert list of dc-decay frequency conversion electric current signal element
± 96V the output ends of member；The output end of dc-decay frequency conversion electric current signal element becomes with the input of demagnetization output unit, decay
Frequency signal code detection unit, decay frequency variation signal voltage detection unit are connected；The output end of demagnetization output unit be connected to by
The step-up side of demagnetization；The output end of decay frequency variation signal current detecting unit and frequency variation signal voltage detection unit of decaying
Connection control collecting unit；The control output end of collecting unit, signal output part is controlled to be connected respectively to dc-decay variable-frequency electric
Flow signal element and analysis expert unit.
8. there is the transformer demagnetization instrument of remanent magnetism quantitative analysis function as claimed in claim 7, it is characterised in that：The direct current
Decay frequency conversion electric current signal element includes constant-current source, gain control unit, the polarization converting unit being linked in sequence；Control collection is single
The electric current output gear of member selection constant-current source, makes its periodic damping, ensures that each gear amplitude is sequentially reduced 5%；Control is adopted
Collection unit controls the size of gain control unit gain simultaneously, it is ensured that the current amplitude of each gear output is linear from maximum
Ground gradually decays to zero：Also control polarity converting unit makes the positive-negative polarity of direct current according to certain frequency to control collecting unit simultaneously
Rate periodically switches over, it is ensured that the dc erasing signal of demagnetization output unit output reaches dc-decay and becomes yupin effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720790007.7U CN207149352U (en) | 2017-06-28 | 2017-06-28 | Transformer demagnetization instrument with remanent magnetism quantitative analysis function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720790007.7U CN207149352U (en) | 2017-06-28 | 2017-06-28 | Transformer demagnetization instrument with remanent magnetism quantitative analysis function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207149352U true CN207149352U (en) | 2018-03-27 |
Family
ID=61671968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720790007.7U Active CN207149352U (en) | 2017-06-28 | 2017-06-28 | Transformer demagnetization instrument with remanent magnetism quantitative analysis function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207149352U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108427034A (en) * | 2018-04-13 | 2018-08-21 | 中国南方电网有限责任公司超高压输电公司曲靖局 | A kind of demagnetizing method based on converter power transformer direct current resistance m easurem ent device |
| CN109378155A (en) * | 2018-12-27 | 2019-02-22 | 国网宁夏电力有限公司 | A kind of converter power transformer eraser system |
| CN110828101A (en) * | 2018-08-14 | 2020-02-21 | 广州供电局有限公司 | Power transformer demagnetization and remanence measurement device |
| CN113325345A (en) * | 2021-06-02 | 2021-08-31 | 云南电网有限责任公司电力科学研究院 | Device and method for testing residual magnetism of transformer core |
-
2017
- 2017-06-28 CN CN201720790007.7U patent/CN207149352U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108427034A (en) * | 2018-04-13 | 2018-08-21 | 中国南方电网有限责任公司超高压输电公司曲靖局 | A kind of demagnetizing method based on converter power transformer direct current resistance m easurem ent device |
| CN110828101A (en) * | 2018-08-14 | 2020-02-21 | 广州供电局有限公司 | Power transformer demagnetization and remanence measurement device |
| CN110828101B (en) * | 2018-08-14 | 2022-02-11 | 广东电网有限责任公司广州供电局 | Power transformer demagnetization and remanence measurement device |
| CN109378155A (en) * | 2018-12-27 | 2019-02-22 | 国网宁夏电力有限公司 | A kind of converter power transformer eraser system |
| CN109378155B (en) * | 2018-12-27 | 2024-05-17 | 国网宁夏电力有限公司 | Converter transformer degaussing system |
| CN113325345A (en) * | 2021-06-02 | 2021-08-31 | 云南电网有限责任公司电力科学研究院 | Device and method for testing residual magnetism of transformer core |
| CN113325345B (en) * | 2021-06-02 | 2024-04-09 | 云南电网有限责任公司电力科学研究院 | Device and method for testing residual magnetism of transformer core |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207149352U (en) | Transformer demagnetization instrument with remanent magnetism quantitative analysis function | |
| CN105093140B (en) | A kind of method and its device of the detection of transformer remanent magnetism and demagnetization | |
| CN102800458B (en) | Direct-current attenuation variable-frequency demagnetizing device | |
| CN106935358B (en) | A kind of transformer demagnetization and verifying device | |
| CN102707173A (en) | Tester | |
| CN202916357U (en) | Comprehensive test instrument for power transformer winding deformation | |
| CN106771632A (en) | Multi-channel DC resistance meter | |
| CN203616394U (en) | An intelligent insulation resistance tester | |
| CN102253296A (en) | Method for testing comprehensive device of transformer | |
| CN200953038Y (en) | Counterpoise comprehensive parameter testing device | |
| CN207798935U (en) | Current transformer calibration device in integrated GIS pipelines | |
| CN110058188A (en) | The active detector of electric energy metering device | |
| CN202041624U (en) | Direct-current high-voltage test integrated device for internal water cooling generator | |
| CN206321710U (en) | A kind of frequency conversion electric current earth loop impedance test instrument | |
| CN103698730A (en) | Current transformer checking system of alternating current-direct current double power supplies | |
| CN203204081U (en) | Tester | |
| CN102565617A (en) | Method for inspecting current loop of main transformer sleeve by using zero lifting flow | |
| CN202749185U (en) | DC (direct current) attenuation frequency conversion demagnetization device | |
| CN201378176Y (en) | High-precision anti-interference excitation power supply for ground screen flaw comprehensively-diagnosing system in transformer substation | |
| CN106771633A (en) | Hand-held instrument for measuring DC resistance | |
| CN107024631A (en) | With the volt-ampere characteristic test method of Multifunctional coil kind equipment testing synthesis parameter device | |
| CN201804052U (en) | Integrative testing device for low frequency and frequency conversion current transformer | |
| CN208721743U (en) | A kind of Assembled high-voltage shunted capacitor set detecting device | |
| CN201429670Y (en) | Oil well transformer fault judgment device | |
| CN102096016A (en) | Automatic analysis device for checking differential protection CT (Current Transformer) wiring correctness of three-winding conventional transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |