CN106771815B - Short circuit and the transformer test platform and method of magnetic flux relevance between test lamination - Google Patents
Short circuit and the transformer test platform and method of magnetic flux relevance between test lamination Download PDFInfo
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- CN106771815B CN106771815B CN201611267961.4A CN201611267961A CN106771815B CN 106771815 B CN106771815 B CN 106771815B CN 201611267961 A CN201611267961 A CN 201611267961A CN 106771815 B CN106771815 B CN 106771815B
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- computer
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- rewinding material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
Abstract
The invention discloses a kind of short circuit and the test platform and test method of magnetic flux relevance between testing lamination, mainly including computer, transformer rewinding material test platform, fault simulation and measuring device, pressure regulator, data acquisition unit and digital oscilloscope；Computer is communicated with fault simulation and measuring device, data acquisition unit and digital oscilloscope by RS485, and fault simulation is fixed at the upper yoke of rewinding material with measuring device；The system of the present invention can effectively measure the relevance between short trouble and main flux amplitude, main flux harmonic wave and local flux size between piece.
Description
Technical field
The invention belongs to transformer fault experimental technique field, short trouble and magnetic more particular between a kind of testing piece
The voltage transformer system of logical relevance, further relates to the test method of short trouble and the voltage transformer system of magnetic flux relevance between piece, energy
Relevance between enough effectively measure pieces between short trouble and main flux amplitude, main flux harmonic wave and local flux size.
Background technology
In electric system, one of most important equipment that transformer is, and the equipment of Frequent Troubles.Once generation event
Forced outage is directly influenced the safe and reliable operation of electric system by barrier, electric substation.Relevant information shows, the iron of transformer
Heart fault rate is only second to winding failure in whole failures, occupy second, and short trouble is exactly one of which between piece
Typical fault.Between iron core generation piece during short circuit, failure circulation can be formed between short-circuit silicon steel sheet under the sensing of main flux, influence office
The distribution of portion's magnetic flux and main flux and amplitude, destroy iron core and winding insulation, burn iron core when serious.It is therefore desirable to pass through
Short-circuit fault simulation is tested to probe into the relevance of short trouble and magnetic flux between piece between Transformer Core Sheet, studies the generation of failure
Mechanism and influence, are the offer references such as the optimization design of Practical Project.
Pervious test method is mainly：One kind is short-circuit test carrying out piece to silicon steel sheet；This method can not be true
Operating mode on ground reflection transformer core diverse location between generation piece during short circuit, degree of referring to are relatively low；Another method is to true
The problem of short circuit is tested between transformer core surface scolding tin realizes piece, this way is can not to repeat to test, and is welded
Tin can affect greatly result of the test.
It is to be based on laminated core transformer mostly currently for short trouble between Transformer Core Sheet and its diagnostic work, but
It is as large capacity rewinding material starts the application in electric system and tractive power supply system, is badly in need of developing a kind of rewinding material transformation
Device platform and method.
The content of the invention
The object of the present invention is to provide short trouble between a kind of test transformer piece and the system of magnetic flux relevance, Neng Gouyou
Relevance between effect ground measure piece between short trouble and main flux amplitude, main flux harmonic wave and local flux size.
Another object of the present invention is the survey of the system based on short trouble between test transformer piece Yu magnetic flux relevance
Method for testing.
To achieve the above object, short trouble and the experiment of magnetic flux relevance are put down between a kind of test lamination of the invention
Platform, mainly including computer, transformer rewinding material test platform, fault simulation and measuring device, pressure regulator, data acquisition unit
With digital oscilloscope；Wherein, transformer rewinding material test platform includes：Rewinding material, high-tension coil, low-voltage coil and measurement line
Circle；High-tension coil is located on the left side stem of rewinding material, is connected with pressure regulator, and low-voltage coil is located at the right side stem of rewinding material
On, in light condition, measuring coil is located on the lower yoke of rewinding material, is connected with digital oscilloscope；Computer and failure mould
Plan is communicated with measuring device, data acquisition unit and digital oscilloscope by RS485, and fault simulation is consolidated with measuring device
It is scheduled at the upper yoke of rewinding material；Fault simulation includes with measuring device：Clamping plate, studdle, nut, collets, copper sheet, electricity
Magnetic relay, microcontroller, hall probe and rectifier；It is provided with seven the clamping plate inner homogeneous of fault simulation and measuring device
Arrange 21 hall probes, probe end and the inner surface of clamping plate are mutually neat, all hall probes all with data acquisition list
The respective channel of member is connected；The gap of seven row's hall probes is provided with six rows, 18 collets altogether；Every piece of collets
One end covers a piece of copper sheet, and the other end is connected with electromagnetic relay, and electromagnetic relay is connected with microcontroller and rectifier,
Microcontroller is connected with computer.
Short trouble and the test method of the system of magnetic flux relevance between the test transformer piece of the present invention：Step is as follows：
The first step：Experimental provision wiring is connected according to wiring schematic diagram, fault simulation and measuring device are clamped in
At the upper yoke of rewinding material；
Second step：Pressure regulator is adjusted, transformer rewinding material primary side voltage is reached rated value；
3rd step：The local flux density value of all hall probe positions is measured, and measurement data is adopted by data
Collection unit is uploaded to computer；
4th step：Using the voltage waveform of digital oscilloscope measurement measuring coil, real time data is uploaded to computer；
5th step：Setting position a is automatically performed by computer instruction artificial intelligence folder, the iron under 30 short-circuit the piece numbers
It is short-circuit between lamination；
6th step：, the local flux density value of all hall probe positions at this time is measured, and measurement data is adopted by data
Collection unit is uploaded to computer；
7th step：The voltage waveform of measuring coil at this time is measured using digital oscilloscope, real time data is uploaded to calculating
Machine；
8th step：The six, the seven steps are repeated, complete a~f positions on iron core, the local flux number under 30-90 piece short circuit the piece numbers
According to this and measuring coil real-time voltage data upload；
9th step：Using computer disposal experimental data, the waveform and harmonic content of main flux, all test datas are obtained
(including local flux) is completed to count by form.
Brief description of the drawings
Fig. 1 is the hardware schematic of the system of the present invention
Fig. 2 is present system Principle of Communication figure
Fig. 3 is the fault simulation measuring device top view involved by present system and method
Fig. 4 is the fault simulation measuring device sectional view involved by present system and method
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings:
As shown in Figure 1, short trouble and the voltage transformer system of magnetic flux relevance include computer 1, rewinding material between testing piece
Test platform 2, fault simulation and measuring device 3, pressure regulator 4, data acquisition unit 5 and digital oscilloscope 10；The volume iron
Heart test platform 2 specifically includes rewinding material 6, high-tension coil 7, low-voltage coil 8 and measuring coil 9；High-tension coil 7 is located at rewinding material
On 6 left side stem, it is connected with pressure regulator 4, low-voltage coil 8 is located on the right side stem of rewinding material 2, in light condition, surveys
Amount coil 9 is located on the lower yoke of rewinding material 6, is connected with digital oscilloscope 10；
As shown in Figure 2 and Figure 3, the fault simulation and measuring device 3, it is characterised in that：Specifically include clamping plate 11, branch
Support screw rod 12, nut 13, collets 14, copper sheet 15, electromagnetic relay 16, microcontroller 17, hall probe 18 and rectifier 19；
Fault simulation is provided with seven rows, 21 hall probes 18 with 11 inner homogeneous of clamping plate of measuring device 3, often arranges and marks respectively
Number be position A, B, C, D, E, F, G, probe end and the inner surface of clamping plate 11 are mutually neat, all hall probes 18 all with data
The respective channel of collecting unit 5 is connected；The gap of 7 row's hall probes 18 is provided with six rows, 18 collets 14 altogether,
Often arrange respectively marked as position a, b, c, d, e, f；It is thick that every piece of 14 one end of collets covers a piece of 10mm × 10mm30 pieces silicon steel sheet
The copper sheet 15 of degree, the other end are connected with electromagnetic relay 16, and electromagnetic relay 16 is connected with microcontroller 17 and rectifier 19
Connect, microcontroller 18 is connected with computer 1；
As shown in figure 4, the microcontroller 17 inside artificial intelligence measuring device 3 is instructed to make electromagnetic relay by computer 1
The pop-up and contraction of 16 action control collets 14, when the collets 14 of upper 11 correspondence position of lower clamp plate eject at the same time, above it
Copper sheet 15 contacted with iron core 6 and realize short circuit between lamination；One piece of copper sheet 15 on same row's collets 14 can be realized
It is short-circuit between the piece of 10mm (30) silicon steel sheet, it can realize 10mm (30) silicon by controlling same row's different insulative block 14 to stretch out
It is short-circuit between the piece of steel disc, 20mm (60) silicon steel sheets and 30mm (90) silicon steel sheet, by controlling different row's collets to stretch out
Short trouble between the piece of achievable different location of short circuit.The hall probe 18 of every copper sheet both sides can be represented effectively at copper sheet
Flux density, the hall probe 18 of dense distribution can effectively study the local flux density of fault zone, and digital oscilloscope 10 is real-time
The voltage waveform of measuring coil 9 is measured, main flux waveform and frequency analysis can be analyzed by being handled by computer 1.
Short trouble and the test method of magnetic flux relevance are specific as follows between a kind of test lamination：
The first step：Experimental provision wiring is connected according to wiring schematic diagram, fault simulation and measuring device 3 are clamped in
At the upper yoke of rewinding material 6.
Second step：Pressure regulator 4 is adjusted, 6 primary side voltage of transformer rewinding material is reached rated value.
3rd step：The local flux density value of all 18 positions of hall probe is measured, and by measurement data by data
Collecting unit 5 is uploaded to computer 1；
4th step：The voltage waveform of measuring coil 9 is measured using digital oscilloscope 10, real time data is uploaded to calculating
Machine；
5th step：Instruct artificial intelligence folder 6 to be automatically performed by computer 1 and complete position a, under 30 short-circuit the piece numbers
It is short-circuit between lamination；
6th step：The local flux density value of all 18 positions of hall probe at this time is measured, and by measurement data by data
Collecting unit 5 is uploaded to computer 1；
7th step：The voltage waveform of measuring coil 9 at this time is measured using digital oscilloscope 10, real time data is uploaded to meter
Calculation machine；
8th step：The six, the seven steps are repeated, complete a~f positions on iron core, the local flux number under 30-90 piece short circuit the piece numbers
According to this and 9 real-time voltage data of measuring coil upload.
9th step：Experimental data is handled using computer 1, obtains the waveform and harmonic content of main flux, all experiment numbers
Complete to count by form according to (including local flux), and then researched and analysed, involved methods of measurement and calculation is as follows：
According to Faraday's electromagnetic induction law, transient voltage data versus time is subjected to integral and calculating, obtains measuring coil
The waveform of transient state interlinkage flux in iron core is wrapped, takes its maximum, obtains including iron core in magnetic flux maximum, divided by the coil
Net sectional area, obtains the maximum B of relevant position average flux densitym。
Magnetic flux cannot be measured directly, because magnetic flux is constantly changing with the time.In fact, according to the law of electromagnetic induction, survey
What is obtained is change rate of the magnetic flux to the time, as induced electromotive force：
It is divided into 200 time steps in each cycle (20ms) of measurement, synchronization gathers instantaneous induced voltage and excitation
Electric current, the current versus time integration of collection.For example, be time step at i-th at the time of tiHave：
After the integration for completing 200 time steps, from 200 integral result BtObtain maximum Bm, and the maximum of inducting flux
Value.And then can must be by the average flux density of the section S of measuring coil position
Claims (2)
1. a kind of short circuit and the transformer test platform of magnetic flux relevance between testing lamination, mainly including computer (1), transformation
Device rewinding material test platform (2), fault simulation and measuring device (3), pressure regulator (4), data acquisition unit (5) and digital oscillography
Device (10)；Wherein, the transformer rewinding material test platform (2) includes rewinding material (6), high-tension coil (7), low-voltage coil (8)
With measuring coil (9)；High-tension coil (7) is located on the left side stem of rewinding material (6), is connected with pressure regulator (4), low-voltage coil
(8) on the right side stem of rewinding material (2), in light condition, measuring coil (9) is located on the lower yoke of rewinding material (6), with
Digital oscilloscope (10) is connected；Computer (1) and fault simulation and measuring device (3), data acquisition unit (5) and numeral
Oscillograph (10) is communicated by RS485, and fault simulation is fixed at the upper yoke of rewinding material (6) with measuring device (3)；
It is characterized in that：The fault simulation and measuring device (3), including：Clamping plate (11), studdle (12), nut (13),
Collets (14), copper sheet (15), electromagnetic relay (16), microcontroller (17), hall probe (18) and rectifier (19)；Failure
Simulation is provided with seven rows 20 hall probe (18) one by one, probe end with clamping plate (11) inner homogeneous of measuring device (3)
End is mutually neat with the inner surface of clamping plate (11), respective channel phase of all hall probes (18) all with data acquisition unit (5)
Connection；The gap of seven row's hall probes (18) is provided with six rows, 18 collets (14), every piece of collets (14) one altogether
End covers a piece of copper sheet (15), and the other end is connected with electromagnetic relay (16), electromagnetic relay (16) and microcontroller (17) with
And rectifier (19) is connected, microcontroller (18) is connected with computer (1).
2. a kind of short circuit and the experiment of the transformer test platform of magnetic flux relevance between testing lamination as claimed in claim 1
Method：Step is as follows：
The first step：Experimental provision wiring is connected according to wiring schematic diagram, fault simulation and measuring device (3) are clamped in volume
At the upper yoke of iron core (6)；
Second step：Pressure regulator (4) is adjusted, transformer rewinding material (6) primary side voltage is reached rated value；
3rd step：The local flux density value of all hall probes (18) position is measured, and measurement data is adopted by data
Collection unit (5) is uploaded to computer (1)；
4th step：Using the voltage waveform of digital oscilloscope (10) measurement measuring coil (9), real time data is uploaded to computer
(1)；
5th step：Artificial intelligence folder (6) is instructed to be automatically performed position a by computer (1), the iron core under 30 short-circuit the piece numbers
It is short-circuit between piece；
6th step：, the local flux density value of all hall probe (18) positions at this time is measured, and measurement data is adopted by data
Collection unit (5) is uploaded to computer (1)；
7th step：The voltage waveform of measuring coil (9) at this time is measured using digital oscilloscope (10), real time data is uploaded to meter
Calculation machine (1)；
8th step：The six, the seven steps are repeated, complete a, b, c on iron core, d, e, f positions, the local magnetic under 30-90 piece short circuit the piece numbers
Logical data and measuring coil (9) real-time voltage data upload；
9th step：Experimental data is handled using computer (1), obtains the waveform and harmonic content of main flux, all test datas
(including local flux) is completed to count by form, and does corresponding processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611267961.4A CN106771815B (en) | 2016-12-31 | 2016-12-31 | Short circuit and the transformer test platform and method of magnetic flux relevance between test lamination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611267961.4A CN106771815B (en) | 2016-12-31 | 2016-12-31 | Short circuit and the transformer test platform and method of magnetic flux relevance between test lamination |
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| Publication Number | Publication Date |
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| CN106771815A CN106771815A (en) | 2017-05-31 |
| CN106771815B true CN106771815B (en) | 2018-05-08 |
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| CN201611267961.4A Active CN106771815B (en) | 2016-12-31 | 2016-12-31 | Short circuit and the transformer test platform and method of magnetic flux relevance between test lamination |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108732450B (en) * | 2018-04-02 | 2019-06-04 | 西南交通大学 | Short-circuit detection method between high-power transformer rewinding material piece |
| CN109541508B (en) * | 2018-12-18 | 2024-02-06 | 特变电工衡阳变压器有限公司 | Main magnetic flux test platform of multi-combination type transformer iron core |
| CN113722938B (en) * | 2021-11-02 | 2022-06-03 | 南昌航空大学 | Double-layer optimization design method of electronic transformer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101477167A (en) * | 2008-01-01 | 2009-07-08 | 浙江广天变压器有限公司 | Voltage differential transformer turn-to-turn short circuit detection apparatus |
| CN103430017A (en) * | 2011-02-11 | 2013-12-04 | 西门子能量股份有限公司 | Fault detection for laminated core |
| CN103592546A (en) * | 2013-11-21 | 2014-02-19 | 杭州西湖电子研究所 | Method for simulating faults of power transformer |
| CN104198936A (en) * | 2014-08-18 | 2014-12-10 | 广东电网公司电力科学研究院 | Device and method for detecting insulation damage faults between tooth blades of large generator stator core based on electromagnetic induction |
-
2016
- 2016-12-31 CN CN201611267961.4A patent/CN106771815B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101477167A (en) * | 2008-01-01 | 2009-07-08 | 浙江广天变压器有限公司 | Voltage differential transformer turn-to-turn short circuit detection apparatus |
| CN103430017A (en) * | 2011-02-11 | 2013-12-04 | 西门子能量股份有限公司 | Fault detection for laminated core |
| CN103592546A (en) * | 2013-11-21 | 2014-02-19 | 杭州西湖电子研究所 | Method for simulating faults of power transformer |
| CN104198936A (en) * | 2014-08-18 | 2014-12-10 | 广东电网公司电力科学研究院 | Device and method for detecting insulation damage faults between tooth blades of large generator stator core based on electromagnetic induction |
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| CN106771815A (en) | 2017-05-31 |
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