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CN109188186A - A kind of polarity of transformer detection method - Google Patents

A kind of polarity of transformer detection method Download PDF

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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
transformer
winding
control switch
under test
polarity
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CN201811311869.2A
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Chinese (zh)
Inventor
刘红文
王科
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Electric Power Research Institute of Yunnan Power System Ltd
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Electric Power Research Institute of Yunnan Power System Ltd
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Application filed by Electric Power Research Institute of Yunnan Power System Ltd filed Critical Electric Power Research Institute of Yunnan Power System Ltd
Priority to CN201811311869.2A priority Critical patent/CN109188186A/en
Publication of CN109188186A publication Critical patent/CN109188186A/en
Pending legal-status Critical 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Relating To Insulation (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

本申请公开了一种变压器绕组极性检测方法，所述方法包括：首先，构建变压器自激振荡回路，所述变压器自激振荡回路包括直流高压发生器、第一控制开关、第二控制开关、被测变压器以及检测装置；其次，闭合所述第一控制开关，使所述直流高压发生器向所述被测变压器绕组对地等效电容充电；然后，断开所述第一控制开关，并迅速闭合所述第二控制开关，使所述被测变压器绕组对地等效电容放电，并与所述被测变压器绕组的励磁阻抗以及所述一次侧三相绕组的阻抗形成串联谐振回路；接着，通过所述检测装置检测所述被测变压器，获取振荡电压；最后，根据所述振荡电压，判断所述被测变压器绕组的极性是否接错。

The present application discloses a transformer winding polarity detection method. The method includes: first, constructing a transformer self-excited oscillation circuit, wherein the transformer self-excited oscillation circuit includes a DC high voltage generator, a first control switch, a second control switch, Transformer under test and detection device; secondly, close the first control switch, so that the DC high voltage generator charges the equivalent capacitance of the transformer winding under test to the ground; then, open the first control switch, and Quickly close the second control switch to discharge the equivalent capacitance of the transformer winding under test to the ground, and form a series resonant circuit with the excitation impedance of the transformer winding under test and the impedance of the three-phase winding on the primary side; then , the transformer under test is detected by the detection device to obtain the oscillating voltage; finally, according to the oscillating voltage, it is judged whether the polarity of the winding of the transformer under test is wrongly connected.

Description

A kind of polarity of transformer detection method
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)

1.一种变压器绕组极性检测方法，其特征在于，包括：1. a transformer winding polarity detection method, is characterized in that, comprises: 11)构建变压器自激振荡回路，所述变压器自激振荡回路包括直流高压发生器、第一控制开关、第二控制开关、被测变压器以及检测装置，其中，所述被测变压器包括一次侧三相绕组以及二次侧三相绕组，所述一次侧三相绕组的尾端连接于一点，形成中性点，所述直流高压发生器电连接至所述中性点，所述第二控制开关电连接于所述直流高压发生器与所述中性点之间，所述第二控制开关的另一端接地，所述被测变压器与所述检测装置相连接；11) Build a transformer self-excited oscillation circuit, the transformer self-excited oscillation circuit includes a DC high-voltage generator, a first control switch, a second control switch, a transformer under test, and a detection device, wherein the transformer under test includes three primary side The phase winding and the three-phase winding on the secondary side, the tail ends of the three-phase winding on the primary side are connected to one point to form a neutral point, the DC high voltage generator is electrically connected to the neutral point, and the second control switch is electrically connected between the DC high voltage generator and the neutral point, the other end of the second control switch is grounded, and the transformer under test is connected to the detection device; 12)闭合所述第一控制开关，使所述直流高压发生器向所述被测变压器绕组对地等效电容充电，其中，所述被测变压器绕组对地等效电容为所述一次侧三相绕组的对地等效电容；12) Close the first control switch to make the DC high voltage generator charge the equivalent capacitance of the transformer winding under test to the ground, wherein the equivalent capacitance of the transformer winding under test to the ground is the primary side three Equivalent capacitance to ground of phase winding; 13)断开所述第一控制开关，并迅速闭合所述第二控制开关，使所述被测变压器绕组对地等效电容放电，并通过所述被测变压器绕组的励磁阻抗以及所述一次侧三相绕组的阻抗形成串联谐振回路；13) Disconnect the first control switch, and quickly close the second control switch to discharge the equivalent capacitance of the transformer winding under test to the ground, and pass the excitation impedance of the transformer winding under test and the primary The impedance of the side three-phase winding forms a series resonant circuit; 14)通过所述检测装置检测所述被测变压器，获取振荡电压，所述振荡电压包括所述一次侧三相绕组的振荡电压，以及所述二次侧三相绕组的振荡电压；14) Detecting the transformer under test by the detection device to obtain an oscillating voltage, where the oscillating voltage includes the oscillating voltage of the three-phase winding on the primary side and the oscillating voltage of the three-phase winding on the secondary side; 15)根据所述振荡电压，判断所述被测变压器绕组的极性是否接错。15) According to the oscillating voltage, determine whether the polarity of the transformer winding under test is wrongly connected. 2.根据权利要求1所述的方法，其特征在于，所述一次侧三相绕组的首端通过套管电容以及分压电容进行接地。2 . The method according to claim 1 , wherein the head end of the three-phase winding on the primary side is grounded through a bushing capacitor and a voltage dividing capacitor. 3 . 3.根据权利要求1所述的方法，其特征在于，3. The method according to claim 1, wherein 所述一次侧三相绕组的连接方式为星形连接。The connection mode of the three-phase windings on the primary side is star connection. 4.根据权利要求3所述的方法，其特征在于，所述被测变压器与所述检测装置相连接，包括：4. The method according to claim 3, wherein the transformer under test is connected to the detection device, comprising: 所述一次侧三相绕组的首端连接至所述检测装置，以及所述二次侧三相绕组的三个端点连接至所述检测装置。The head end of the three-phase winding on the primary side is connected to the detection device, and the three end points of the three-phase winding on the secondary side are connected to the detection device. 5.根据权利要求1所述的方法，其特征在于，所述根据所述振荡电压，判断所述被测变压器绕组的极性是否接错，包括：5 . The method according to claim 1 , wherein, according to the oscillating voltage, judging whether the polarity of the transformer winding under test is wrongly connected, comprising: 6 . 如果所述一次侧三相绕组的振荡电压与所述二次侧三相绕组的振荡电压相位一致，则判定所述被测变压器绕组的极性没有接错；If the oscillating voltage of the three-phase winding on the primary side is in phase with the oscillating voltage of the three-phase winding on the secondary side, it is determined that the polarity of the transformer winding under test is not wrongly connected; 如果所述一次侧三相绕组的振荡电压与所述二次侧三相绕组的振荡电压相位不一致，则判定所述被测变压器绕组的极性接错。If the oscillating voltage of the three-phase winding on the primary side is out of phase with the oscillating voltage of the three-phase winding on the secondary side, it is determined that the polarity of the winding under test is wrong. 6.根据权利要求1所述的方法，其特征在于，所述第一控制开关用于控制所述直流高压发生器是否发出直流电压，包括：6. The method according to claim 1, wherein the first control switch is used to control whether the DC high voltage generator emits a DC voltage, comprising: 当所述第一控制开关为闭合时，所述直流高压发生器发出直流电压；When the first control switch is closed, the DC high voltage generator emits a DC voltage; 当所述第一控制开关为断开时，所述直流高压发生器不发出直流电压。When the first control switch is turned off, the DC high voltage generator does not emit a DC voltage. 7.根据权利要求1所述的方法，其特征在于，所述直流高压发生器与所述中性点之间设置有保护电阻。7. The method according to claim 1, wherein a protection resistor is provided between the DC high voltage generator and the neutral point. 8.根据权利要求1所述的方法，其特征在于，所述直流高压发生器连接有220V交流电源。8. The method according to claim 1, wherein the DC high voltage generator is connected with a 220V AC power supply.
CN201811311869.2A 2018-11-06 2018-11-06 A kind of polarity of transformer detection method Pending CN109188186A (en)

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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
CN115184837A (en) * 2022-07-20 2022-10-14 云南电网有限责任公司电力科学研究院 Equivalent test device and method for transformer coil

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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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Cited By (2)

* Cited by examiner, † Cited by third party
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
CN115184837A (en) * 2022-07-20 2022-10-14 云南电网有限责任公司电力科学研究院 Equivalent test device and method for transformer coil

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Application publication date: 20190111

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