CN109188186A - A kind of polarity of transformer detection method - Google Patents
A kind of polarity of transformer detection method Download PDFInfo
- Publication number
- CN109188186A CN109188186A CN201811311869.2A CN201811311869A CN109188186A CN 109188186 A CN109188186 A CN 109188186A CN 201811311869 A CN201811311869 A CN 201811311869A CN 109188186 A CN109188186 A CN 109188186A
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- China
- Prior art keywords
- winding
- control switch
- transformer
- tested transformer
- direct current
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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
- G01R31/72—Testing of electric windings
Abstract
This application discloses a kind of polarity of transformer detection methods, the described method includes: first, transformer self-oscillation circuit is constructed, transformer self-oscillation circuit includes high voltage direct current generator, the first control switch, the second control switch, tested transformer and detection device；Secondly, closure first control switch, making the high voltage direct current generator to the tested transformer winding, equivalent capacity charges over the ground；Then, disconnect first control switch, and the second control switch described in rapid closing, making the tested transformer winding, equivalent capacity is discharged over the ground, and forms series resonant tank with the impedance of the excitation impedance of the tested transformer winding and the three phases winding at primary side；Then, the tested transformer is detected by the detection device, obtains oscillating voltage；Finally, according to the oscillating voltage, judge the tested transformer winding polarity whether wrong.
Description
Technical field
This application involves technical field of transformer equipment more particularly to a kind of polarity of transformer detection methods.
Background technique
The polarity of transformer winding refer to transformer three phases winding at primary side, secondary side three-phase windings same magnetic flux work
With the phase relation between lower generated induced potential.If the polarity wrong of transformer winding will lead to transformer and transport
Occur when row it is badly damaged, therefore, transformer winding before being attached, should detect polarity whether wrong.In the prior art, right
The key step that polarity of transformer is detected includes: then will firstly, determine the both ends of every phase winding using multimeter
Three-phase windings any two ends are together in series, and are then passed through single-phase alternating current 36V, then with voltmeter measurement third phase winding electricity
Pressure, the polarity of winding can be judged according to measurement result.
But applicant has found in research process of the invention, using the method provided in the prior art, detects transformer
The polarity of winding whether wrong when, operating procedure is relatively complicated, and the time that entire detection process is spent is longer, and detection efficiency is low.
Summary of the invention
In order to solve to detect the complex for operation step of polarity of transformer in the prior art, spend the time longer, detection
The problem of low efficiency, the application disclose a kind of polarity of transformer detection method by following embodiment.
A kind of polarity of transformer detection method disclosed in the present application, which comprises
11) transformer self-oscillation circuit is constructed, transformer self-oscillation circuit includes high voltage direct current generator, the
One control switch, the second control switch, tested transformer and detection device, wherein the tested transformer includes primary side
Three-phase windings and secondary side three-phase windings, the tail end of the three phases winding at primary side are connected to a bit, form neutral point, described
High voltage direct current generator is electrically connected to the neutral point, second control switch be electrically connected to the high voltage direct current generator with
Between the neutral point, the other end of second control switch is grounded, and the tested transformer is connected with the detection device
It connects；
12) be closed first control switch, make the high voltage direct current generator to the tested transformer winding over the ground
Equivalent capacity charging, wherein the tested transformer winding over the ground equivalent capacity be the three phases winding at primary side over the ground etc.
Imitate capacitor；
13) first control switch, and the second control switch described in rapid closing are disconnected, make the tested transformer around
Group over the ground discharge by equivalent capacity, and passes through the excitation impedance of the tested transformer winding and the three phases winding at primary side
Impedance forms series resonant tank；
14) the tested transformer is detected by the detection device, obtains oscillating voltage, the oscillating voltage includes institute
State the oscillating voltage of three phases winding at primary side and the oscillating voltage of the secondary side three-phase windings；
15) according to the oscillating voltage, judge the tested transformer winding polarity whether wrong.
Optionally, the head end of the three phases winding at primary side is grounded by capacitance of bushing and derided capacitors.
Optionally, the connection type of the three phases winding at primary side is star-like connection.
Optionally, the tested transformer is connected with the detection device, comprising:
The head end of the three phases winding at primary side is connected to the three of the detection device and the secondary side three-phase windings
A endpoint is connected to the detection device.
Optionally, described according to the oscillating voltage, judge the tested transformer winding polarity whether wrong, packet
It includes:
If the oscillating voltage phase one of the oscillating voltage of the three phases winding at primary side and the secondary side three-phase windings
It causes, then determines that the polarity of the tested transformer winding does not have wrong；
If the oscillating voltage phase of the oscillating voltage of the three phases winding at primary side and the secondary side three-phase windings is not
Unanimously, then determine the polarity wrong of the tested transformer winding.
Optionally, first control switch is wrapped for controlling whether the high voltage direct current generator issues DC voltage
It includes:
When first control switch is closure, the high voltage direct current generator issues DC voltage；
When first control switch is to disconnect, the high voltage direct current generator does not issue DC voltage.
This application discloses a kind of polarity of transformer detection methods, which comprises firstly, building transformer is certainly
Induced Oscillation circuit, transformer self-oscillation circuit include high voltage direct current generator, the first control switch, second control open
It closes, be tested transformer and detection device；Secondly, closure first control switch, makes the high voltage direct current generator to institute
Stating tested transformer winding, equivalent capacity charges over the ground；Then, first control switch is disconnected, and second described in rapid closing
Control switch, making the tested transformer winding, equivalent capacity is discharged over the ground, and the excitation reluctance with the tested transformer winding
The impedance of the anti-and described three phases winding at primary side forms series resonant tank；Then, by described in detection device detection
Tested transformer, obtains oscillating voltage；Finally, judging that the polarity of the tested transformer winding is according to the oscillating voltage
No wrong.By a kind of polarity of transformer detection method disclosed in the present application, the first control switch and the need to be only controlled
Two control switches are cut-off, just can quick obtaining oscillating voltage can intuitively judge by comparing the phase of oscillating voltage
The polarity of tested transformer winding whether wrong.Compared to the prior art, a kind of polarity of transformer inspection provided by the present application
Survey method, not only operating procedure is simple, but also detection the time it takes is short, effectively increases detection efficiency.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is a kind of workflow schematic diagram of polarity of transformer detection method disclosed in the embodiment of the present application；
Fig. 2 is in a kind of polarity of transformer detection method disclosed in the embodiment of the present application, constructed transformer is certainly
The structural schematic diagram in Induced Oscillation circuit；
Fig. 3 is in a kind of polarity of transformer detection method disclosed in the embodiment of the present application, constructed transformer is certainly
The circuit diagram in Induced Oscillation circuit；
Fig. 4 is acquired oscillating voltage in a kind of polarity of transformer detection method disclosed in the embodiment of the present application
Schematic diagram.
Specific embodiment
In order to solve to detect the complex for operation step of polarity of transformer in the prior art, spend the time longer, detection
The problem of low efficiency, the application disclose a kind of polarity of transformer detection method by following embodiment.
A kind of polarity of transformer detection method disclosed in the present application, workflow schematic diagram shown in Figure 1, institute
The method of stating includes:
Step S11, transformer self-oscillation circuit, transformer self-oscillation circuit shown in Figure 2, the change are constructed
Depressor self-oscillation circuit includes high voltage direct current generator 1, the first control switch, the second control switch K2, tested transformer 2 with
And detection device 3, wherein the tested transformer 2 includes three phases winding at primary side and secondary side three-phase windings, described primary
The tail end of side three-phase windings is connected to a bit, forms neutral point, and the high voltage direct current generator 1 is electrically connected to the neutral point,
The second control switch K2It is electrically connected between the high voltage direct current generator 1 and the neutral point, second control is opened
Close K2Other end ground connection, the tested transformer is connected with the detection device.
Step S12, it is closed first control switch, makes the high voltage direct current generator to the tested transformer winding
Over the ground equivalent capacity charge, wherein the tested transformer winding over the ground equivalent capacity be the three phases winding at primary side pair
Ground equivalent capacity.
Step S13, first control switch, and the second control switch described in rapid closing are disconnected, the tested change is made
Depressor winding over the ground discharge by equivalent capacity, and passes through the excitation impedance of the tested transformer winding and the primary side three-phase
The impedance of winding forms series resonant tank.
Step S14, the tested transformer is detected by the detection device, obtains oscillating voltage, the oscillating voltage
The oscillating voltage of oscillating voltage and the secondary side three-phase windings including the three phases winding at primary side.
Step S15, according to the oscillating voltage, judge the tested transformer winding polarity whether wrong.
Circuit diagram shown in Figure 3, K1For the control switch of high voltage direct current generator 1, i.e., described first control
Switch, K2For the second control switch, power supply UZThe DC voltage issued by high voltage direct current generator 1, C0For tested transformer electricity
Hold molded cannula capacitor, C1To be tested transformer winding equivalent capacity over the ground, high voltage direct current generator 1 and the one of tested transformer 2
The neutral point of secondary side winding connects, and passes through the first control switch K1Whether control high voltage direct current generator 1 issues DC voltage, right
Neutral point charging, i.e., to tested transformer winding equivalent capacity C over the ground1Charging.R1And X1For be tested transformer 2 primary side around
The resistance and leakage reactance of group, R2And X2For the secondary side winding resistance and leakage reactance for being tested transformer 2, RmAnd XmTo be tested transformer 2
Excitation resistance and excitation reactance.Close the first control switch K1, so that high voltage direct current generator 1 issues DC voltage, to tested
Transformer winding equivalent capacity C over the ground1Voltage Uz is charged to, the first control switch K is then turned off1, make high voltage direct current generator 1
Stop issuing DC voltage, and closes the second control switch K rapidly2, so that being tested transformer winding equivalent capacity C over the ground1Start
Electric discharge, with R1、X1、RmAnd XmForm series resonant tank.The oscillation power energy in the circuit passes through between tested transformer winding
Distribution capacity coupling and tested transformer winding excitation impedance are formed by magnetic coupling, are coupled to other windings, are formed secondary
The oscillating voltage U of side three-phase windingsCS2, oscillating voltage is obtained by detection device 3, the oscillating voltage includes tested transformer
The oscillating voltage U of three phases winding at primary sideCS1And the oscillating voltage U of secondary side three-phase windingsCS2, wherein UCS1For the second control
Make switch K2After closure, the oscillating voltage of three phases winding at primary side detected by detection device 3.Then according to oscillating voltage,
Judge UCS1With UCS2Phase it is whether consistent, if unanimously, determining that the polarity of tested transformer winding does not have wrong；If no
Unanimously, then the polarity wrong for determining tested transformer winding, at this time, it may be necessary to check the winding polarity of transformer, and re-starts
Measurement.
Referring to fig. 4, Fig. 4 is oscillating voltage schematic diagram provided by the embodiment of the present application, and in figure, abscissa is the time, is indulged
Coordinate is oscillating voltage, there is two voltage oscillograms, respectively tested transformer three phases winding at primary side oscillating voltage U in figureCS1
And secondary side three-phase windings oscillating voltage UCS2, by comparing the phase of the two voltage waveforms, that is, can determine whether and analyze tested
The polarity of transformer winding whether wrong, it can be seen from the figure that UCS1With UCS2The phase of this two voltage waveforms is inconsistent, because
This can be determined that the polarity wrong of this tested transformer winding.Compared to the prior art, detection method disclosed in the present application, not only
Operating procedure is simple, and by the oscillating voltage waveform diagram of testing result, judgement that can be simple and clear be tested transformer around
Group polarity whether wrong.
Further, the head end of the three phases winding at primary side passes through capacitance of bushing C0And derided capacitors 4 are grounded.
Further, the connection type of the three phases winding at primary side is star-like connection.
The connection type of the secondary side three-phase windings can be star-like connection, or triangle connection.
The circuit operation principle of the application can be summarized are as follows: straight by applying in the neutral point of tested transformer star winding
After galvanic electricity pressure, rapidly by neutral ground, the oscillating voltage U of three phases winding at primary side is obtainedCS1, oscillating voltage UCS1Pass through capacitor
Other windings are coupled and be magnetically coupled to, the oscillating voltage U of secondary side three-phase windings is obtainedCS2.Change is cleverly utilized in the application
Distribution capacity between depressor excitation impedance, winding-to-earth capacity and winding constitutes series resonant tank, has circuit simple,
Detect the strong advantage of signal.
Further, the tested transformer is connected with the detection device, comprising:
The head end of the three phases winding at primary side is connected to the three of the detection device and the secondary side three-phase windings
A endpoint is connected to the detection device.
Further, described according to the oscillating voltage, judge the tested transformer winding polarity whether wrong, packet
It includes:
If the oscillating voltage phase one of the oscillating voltage of the three phases winding at primary side and the secondary side three-phase windings
It causes, then determines that the polarity of the tested transformer winding does not have wrong；
If the oscillating voltage phase of the oscillating voltage of the three phases winding at primary side and the secondary side three-phase windings is not
Unanimously, then determine the polarity wrong of the tested transformer winding.
Further, first control switch is used to control whether the high voltage direct current generator issues DC voltage,
Include:
As the first control switch K1When to be closed, the high voltage direct current generator 1 issues DC voltage；
As the first control switch K1When to disconnect, the high voltage direct current generator 1 does not issue DC voltage.
Further, protective resistance is provided between the high voltage direct current generator and the neutral point.
Protective resistance 5 is the resistor used exclusively for high-tension testing apparatus.
Further, the high voltage direct current generator is connected with 220V AC power source.
The high voltage direct current generator 1 as shown in the self-oscillation circuit in Fig. 2, makes for providing DC high-voltage source
It, need to be by 1 reliable ground of high voltage direct current generator with preceding.
Combine detailed description and exemplary example that the application is described in detail above, but these explanations are simultaneously
It should not be understood as the limitation to the application.It will be appreciated by those skilled in the art that without departing from the application spirit and scope,
A variety of equivalent substitution, modification or improvements can be carried out to technical scheme and embodiments thereof, these each fall within the application
In the range of.The protection scope of the application is determined by the appended claims.
Claims (8)
1. a kind of polarity of transformer detection method characterized by comprising
11) transformer self-oscillation circuit is constructed, transformer self-oscillation circuit includes high voltage direct current generator, the first control
Make switch, the second control switch, tested transformer and detection device, wherein the tested transformer includes primary side three-phase
Winding and secondary side three-phase windings, the tail end of the three phases winding at primary side are connected to a bit, form neutral point, the direct current
High pressure generator is electrically connected to the neutral point, second control switch be electrically connected to the high voltage direct current generator with it is described
Between neutral point, the other end of second control switch is grounded, and the tested transformer is connected with the detection device；
12) it is closed first control switch, keeps the high voltage direct current generator equivalent over the ground to the tested transformer winding
Capacitor charging, wherein the tested transformer winding over the ground equivalent capacity be the three phases winding at primary side electricity equivalent over the ground
Hold；
13) first control switch, and the second control switch described in rapid closing are disconnected, the tested transformer winding pair is made
The electric discharge of ground equivalent capacity, and the impedance of the excitation impedance and the three phases winding at primary side by the tested transformer winding
Form series resonant tank；
14) the tested transformer is detected by the detection device, obtains oscillating voltage, the oscillating voltage includes described one
The oscillating voltage of the oscillating voltage of secondary side three-phase windings and the secondary side three-phase windings；
15) according to the oscillating voltage, judge the tested transformer winding polarity whether wrong.
2. the method according to claim 1, wherein the head end of the three phases winding at primary side passes through capacitance of bushing
And derided capacitors are grounded.
3. the method according to claim 1, wherein
The connection type of the three phases winding at primary side is star-like connection.
4. according to the method described in claim 3, it is characterized in that, the tested transformer is connected with the detection device,
Include:
The head end of the three phases winding at primary side is connected to three ends of the detection device and the secondary side three-phase windings
Point is connected to the detection device.
5. judging the tested change the method according to claim 1, wherein described according to the oscillating voltage
The polarity of depressor winding whether wrong, comprising:
If the oscillating voltage of the three phases winding at primary side is consistent with the oscillating voltage phase of the secondary side three-phase windings,
Determine that the polarity of the tested transformer winding does not have wrong；
If the oscillating voltage of the three phases winding at primary side and the oscillating voltage phase of the secondary side three-phase windings are inconsistent,
Then determine the polarity wrong of the tested transformer winding.
6. the method according to claim 1, wherein first control switch is for controlling the high direct voltage
Whether generator issues DC voltage, comprising:
When first control switch is closure, the high voltage direct current generator issues DC voltage；
When first control switch is to disconnect, the high voltage direct current generator does not issue DC voltage.
7. the method according to claim 1, wherein being set between the high voltage direct current generator and the neutral point
It is equipped with protective resistance.
8. the method according to claim 1, wherein the high voltage direct current generator is connected with 220V alternating current
Source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811311869.2A CN109188186A (en) | 2018-11-06 | 2018-11-06 | A kind of polarity of transformer detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811311869.2A CN109188186A (en) | 2018-11-06 | 2018-11-06 | A kind of polarity of transformer detection method |
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| Publication Number | Publication Date |
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| CN109188186A true CN109188186A (en) | 2019-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811311869.2A Pending CN109188186A (en) | 2018-11-06 | 2018-11-06 | A kind of polarity of transformer detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110703160A (en) * | 2019-08-16 | 2020-01-17 | 宁夏送变电工程有限公司 | Polarity direct current detection method for current transformer of extra-high voltage converter transformer |
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| CN105572531A (en) * | 2015-12-11 | 2016-05-11 | 天津二十冶建设有限公司 | Determination method for three-phase transformer bank polarity |
| CN108120895A (en) * | 2018-01-15 | 2018-06-05 | 云南电网有限责任公司电力科学研究院 | A kind of wave of oscillation detection deformation of transformer winding circuit and method |
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| CN201464596U (en) * | 2009-07-22 | 2010-05-12 | 天津市电力公司 | Electronic transducer polarity detecting system |
| ES2340906B2 (en) * | 2009-09-21 | 2011-04-08 | Universidad Politecnica De Madrid | SYSTEM AND METHOD OF LOCALIZATION OF GROUND FAULTS IN WINDINGS OF INDUCED SYNCHRONOUS MACHINES. |
| CN101692115A (en) * | 2009-09-23 | 2010-04-07 | 河南省电力公司商丘供电公司 | Polarity tester for current transformer at transformer neutral point |
| CN201867462U (en) * | 2010-11-19 | 2011-06-15 | 中国十九冶集团有限公司 | Winding polarity test device |
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| CN110703160A (en) * | 2019-08-16 | 2020-01-17 | 宁夏送变电工程有限公司 | Polarity direct current detection method for current transformer of extra-high voltage converter transformer |
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Application publication date: 20190111 |