CN108267660A - A kind of Diagnosis Method of Transformer Faults and device - Google Patents

A kind of Diagnosis Method of Transformer Faults and device Download PDF

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Publication number
CN108267660A
CN108267660A CN201810233033.9A CN201810233033A CN108267660A CN 108267660 A CN108267660 A CN 108267660A CN 201810233033 A CN201810233033 A CN 201810233033A CN 108267660 A CN108267660 A CN 108267660A
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China
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voltage waveform
pressure side
transformer
electric current
side voltage
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CN108267660B (en
Inventor
林春耀
杨贤
周丹
孙文星
欧阳旭东
马志钦
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Electric Power Research Institute of Guangdong Power Grid Co Ltd
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Electric Power Research Institute of Guangdong Power Grid Co Ltd
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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

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

Abstract

The embodiment of the invention discloses a kind of Diagnosis Method of Transformer Faults and devices.The present invention applies operating impulse voltage by the low-pressure side in transformer to be detected, induction type oscillating operation wave can be caused in high-pressure side, operating impulse voltage and induction type oscillating operation wave can be with simulated operation overvoltage, detect the tolerance to switching overvoltage of transformer to be detected, by detecting practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually showing hinders electric current and by itself and the normal low-pressure side voltage in historical test data, normal high side voltage waveform shows that hindering electric current is compared and can currently whether there is failure with accurate judgement transformer to be detected with normal, solves the technical issues of efficient diagnosis is carried out to the electric power transformer to be detected in super extra-high voltage system.

Description

A kind of Diagnosis Method of Transformer Faults and device
Technical field
The present invention relates to Fault Diagnosis for Electrical Equipment field more particularly to a kind of Diagnosis Method of Transformer Faults and device.
Background technology
Current super extra-high voltage (HV) transmission system is in Chinese fast development, and electric power transformer to be detected is electric system Core component, electric power transformer to be detected are the key that ensure that power grid is reliable, safe operation.
These three overvoltage of power-frequency overvoltage, lightning surge and switching overvoltage in short-term are primarily present in electric system Form.
For super extra-high voltage system, power-frequency overvoltage and lightning surge have not been to influence apparatus insulated level in short-term Principal element, and switching overvoltage is major influence factors.
Therefore, how to carry out efficient diagnosis to the electric power transformer to be detected in super extra-high voltage system becomes this field skill The technical issues of art personnel's urgent need to resolve.
Invention content
The present invention provides a kind of Diagnosis Method of Transformer Faults and devices, solve to the electric power in super extra-high voltage system Transformer to be detected carries out the technical issues of efficient diagnosis.
The present invention provides a kind of Diagnosis Method of Transformer Faults, including：
S1：Behaviour is applied to the first phase of the low-pressure side of the delta connection of transformer to be detected by impulse voltage generator Make surge voltage；
S2：Using in the high-pressure side of star-star connection with the first corresponding phase of low-pressure side as the second phase, by with low-pressure side The oscillograph of voltage input end electrical connection of the first phase obtain the practical low-pressure side voltage waveform of transformer to be detected, by with The oscillograph of on high-tension side second phase non-neutral point connecting pin electrical connection obtains the actual high-voltage side voltage wave of transformer to be detected Shape shows that hindering actually showing for resistance hinders electric current by what the oscillograph that is electrically connected with high-pressure side neutral point obtained transformer to be detected；
S3：Show to practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and that actually hindering electric current is handled, respectively Obtain practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually show the wave front time for hindering electric current, the wave rear time and Frequency of oscillation；
S4：Show practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually the wave front time for hindering electric current, wave Tail time and frequency of oscillation normal low-pressure side voltage corresponding with same operation surge voltage in historical test data, normal high pressure Side voltage waveform and normally show that the wave front time for hindering electric current, wave rear time and frequency of oscillation are compared and calculate reality respectively one by one Border low-pressure side voltage waveform, actual high-voltage side voltage waveform and when actually showing the wave front time deviation percent for hindering electric current, wave rear Between deviation percent and oscillation frequency deviation percentage, judge whether practical low-pressure side voltage waveform, actual high-voltage side voltage wave Shape and actually show that the wave front time deviation percent for hindering electric current is smaller than the first preset threshold value and practical low-pressure side voltage waveform, reality Border high side voltage waveform and actually show that the wave rear time deviation percentage for hindering electric current is smaller than the second preset threshold value and practical low Pressure side voltage waveform, actual high-voltage side voltage waveform and actually to show that the oscillation frequency deviation percentage for hindering electric current is smaller than third pre- Threshold value is put, if it is not, then there are failures for transformer to be detected.
Preferably, step S4 is specifically included：
S41：It will be in the wave front time of practical low-pressure side voltage waveform, wave rear time and frequency of oscillation and historical test data Wave front time, wave rear time and the frequency of oscillation of the corresponding normal low-pressure side voltage of same operation surge voltage are compared one by one And wave front time deviation percent, wave rear time deviation percentage and the frequency of oscillation of practical low-pressure side voltage waveform are calculated respectively Deviation percent judges whether that the wave front time deviation percent of practical low-pressure side voltage waveform is less than the first preset threshold value and reality The wave rear time deviation percentage of border low-pressure side voltage waveform is less than shaking for the second preset threshold value and practical low-pressure side voltage waveform Frequency departure percentage is swung less than third preset threshold value, if so, step S42 is performed, if it is not, then performing step S43；
S42：By actual high-voltage side voltage waveform and actually show the wave front time for hindering electric current, wave rear time and frequency of oscillation with The corresponding normal high side voltage waveform of same operation surge voltage and when normally showing the wavefront for hindering electric current in historical test data Between, wave rear time and frequency of oscillation compared and calculate actual high-voltage side voltage waveform respectively and actually show and hinder electric current one by one Wave front time deviation percent, wave rear time deviation percentage and oscillation frequency deviation percentage, judge whether actual high-voltage side Voltage waveform and actually show that the wave front time deviation percent for hindering electric current is smaller than the first preset threshold value and actual high-voltage side voltage Waveform and actually show that the wave rear time deviation percentage for hindering electric current is smaller than the second preset threshold value and actual high-voltage side voltage waveform Actually show that the oscillation frequency deviation percentage for hindering electric current is smaller than third preset threshold value, if so, transformer to be detected is without reason Barrier, if it is not, then transformer to be detected only has high-pressure side there are failures；
S43：By actual high-voltage side voltage waveform and actually show the wave front time for hindering electric current, wave rear time and frequency of oscillation with The corresponding normal high side voltage waveform of same operation surge voltage and when normally showing the wavefront for hindering electric current in historical test data Between, wave rear time and frequency of oscillation compared and calculate actual high-voltage side voltage waveform respectively and actually show and hinder electric current one by one Wave front time deviation percent, wave rear time deviation percentage and oscillation frequency deviation percentage, judge whether actual high-voltage side Voltage waveform and actually show that the wave front time deviation percent for hindering electric current is smaller than the first preset threshold value and actual high-voltage side voltage Waveform and actually show that the wave rear time deviation percentage for hindering electric current is smaller than the second preset threshold value and actual high-voltage side voltage waveform Actually show that the oscillation frequency deviation percentage for hindering electric current is smaller than third preset threshold value, if so, transformer to be detected only has Low-pressure side is there are failure, if it is not, then all there are failures for the low pressure side and high pressure side of transformer to be detected.
Preferably, step S4 is further included：Step S44；
Step S44：When the high-pressure side of transformer to be detected is there are during failure, pass through connecing for the casing of on high-tension side second phase The oscillograph for being located in the HFCT sensors of socket and being electrically connected with HFCT sensors obtains Partial discharge signal waveform, according to Partial discharge signal Waveform judges whether partial discharge phenomenon, if so, the on high-tension side failure of transformer to be detected is insulation fault, if No, then the on high-tension side failure of transformer to be detected is winding deformation failure.
Preferably, step S44 is specifically included：
When the high-pressure side of transformer to be detected is there are during failure, passes through and be socketed at the ground connection of the casing of on high-tension side second phase HFCT sensors and the oscillograph that is electrically connected with HFCT sensors obtain Partial discharge signal waveform, Partial discharge signal waveform is filtered Wave processing, partial discharge phenomenon is judged whether according to filtered Partial discharge signal waveform, if so, transformer to be detected On high-tension side failure is insulation fault, if it is not, then the on high-tension side failure of transformer to be detected is winding deformation failure.
Preferably, it is further included after step S4：Step S5；
S5：The numerical value of operating impulse voltage is adjusted, and returns by the parameter for changing operation impulse voltage generator Return step S1.
The present invention provides a kind of transformer fault diagnosis device, including：
Surge voltage unit, for passing through low-pressure side of the impulse voltage generator to the delta connection of transformer to be detected The first phase apply operating impulse voltage；
Practical acquiring unit, in the high-pressure side using star-star connection with the first corresponding phase of low-pressure side as second Phase obtains the practical low-pressure side of transformer to be detected by the oscillograph that the voltage input end of the first phase with low-pressure side is electrically connected Voltage waveform obtains the reality of transformer to be detected by the oscillograph being electrically connected on high-tension side second phase non-neutral point connecting pin Border high side voltage waveform hinders resistance by oscillograph acquisition the showing for transformer to be detected being electrically connected with high-pressure side neutral point Actually show and hinder electric current；
Actual treatment unit, for practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually show wound electricity Stream is handled, and is obtained practical low-pressure side voltage waveform, actual high-voltage side voltage waveform respectively and is actually shown the wavefront for hindering electric current Time, wave rear time and frequency of oscillation；
Contrast judgement unit, for by practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually show wound electricity Wave front time, wave rear time and the frequency of oscillation normal low pressure corresponding with same operation surge voltage in historical test data of stream Side voltage, normal high side voltage waveform and normal show that the wave front time for hindering electric current, wave rear time and frequency of oscillation carry out one by one It compares and calculates practical low-pressure side voltage waveform, actual high-voltage side voltage waveform respectively and actually show that the wave front time for hindering electric current is inclined Poor percentage, wave rear time deviation percentage and oscillation frequency deviation percentage judge whether practical low-pressure side voltage waveform, reality Border high side voltage waveform and actually show that the wave front time deviation percent for hindering electric current is smaller than the first preset threshold value and practical low It presses side voltage waveform, actual high-voltage side voltage waveform and actually shows that the wave rear time deviation percentage for hindering electric current is smaller than second in advance It puts threshold value and practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually shows the oscillation frequency deviation percentage for hindering electric current Than being smaller than third preset threshold value, if it is not, then there are failures for transformer to be detected.
Preferably, contrast judgement unit specifically includes：
Low pressure comparison subunit, for by the wave front time of practical low-pressure side voltage waveform, wave rear time and frequency of oscillation Wave front time, wave rear time and the oscillation of normal low-pressure side voltage corresponding with same operation surge voltage in historical test data Frequency is compared and calculates the wave front time deviation percent of practical low-pressure side voltage waveform, wave rear time deviation respectively one by one Percentage and oscillation frequency deviation percentage judge whether that the wave front time deviation percent of practical low-pressure side voltage waveform is less than The wave rear time deviation percentage of first preset threshold value and practical low-pressure side voltage waveform is less than the second preset threshold value and reality is low The oscillation frequency deviation percentage of side voltage waveform is pressed to be less than third preset threshold value, if so, the first high pressure subelement of triggering, if It is no, then trigger the second high pressure subelement；
First high pressure subelement, for showing actual high-voltage side voltage waveform and actually the wave front time for hindering electric current, wave rear Time and frequency of oscillation normal high side voltage waveform corresponding with same operation surge voltage in historical test data and normal Show that the wave front time for hindering electric current, wave rear time and frequency of oscillation are compared and calculate actual high-voltage side voltage waveform respectively one by one Actually show the wave front time deviation percent for hindering electric current, wave rear time deviation percentage and oscillation frequency deviation percentage, sentence It is disconnected whether actual high-voltage side voltage waveform and actually to show that the wave front time deviation percent for hindering electric current is smaller than the first preset threshold value And actual high-voltage side voltage waveform and actually show that the wave rear time deviation percentage for hindering electric current is smaller than the second preset threshold value and reality Border high side voltage waveform and actually show that the oscillation frequency deviation percentage for hindering electric current is smaller than third preset threshold value, if so, Transformer fault-free to be detected, if it is not, then transformer to be detected only has high-pressure side there are failures；
Second high pressure subelement, for showing actual high-voltage side voltage waveform and actually the wave front time for hindering electric current, wave rear Time and frequency of oscillation normal high side voltage waveform corresponding with same operation surge voltage in historical test data and normal Show that the wave front time for hindering electric current, wave rear time and frequency of oscillation are compared and calculate actual high-voltage side voltage waveform respectively one by one Actually show the wave front time deviation percent for hindering electric current, wave rear time deviation percentage and oscillation frequency deviation percentage, sentence It is disconnected whether actual high-voltage side voltage waveform and actually to show that the wave front time deviation percent for hindering electric current is smaller than the first preset threshold value And actual high-voltage side voltage waveform and actually show that the wave rear time deviation percentage for hindering electric current is smaller than the second preset threshold value and reality Border high side voltage waveform and actually show that the oscillation frequency deviation percentage for hindering electric current is smaller than third preset threshold value, if so, Transformer to be detected only has low-pressure side there are failure, if it is not, then all there are failures for the low pressure side and high pressure side of transformer to be detected.
Preferably, contrast judgement unit further includes：Fault type subelement；
Fault type subelement, for when the high-pressure side of transformer to be detected is there are during failure, passing through on high-tension side second The HFCT sensors being socketed at the ground connection of the casing of phase and the oscillograph being electrically connected with HFCT sensors obtain Partial discharge signal waveform, Partial discharge phenomenon is judged whether according to Partial discharge signal waveform, if so, the on high-tension side failure of transformer to be detected is Insulation fault, if it is not, then the on high-tension side failure of transformer to be detected is winding deformation failure.
Preferably, fault type subelement, specifically for when the high-pressure side of transformer to be detected is there are during failure, passing through height Press the HFCT sensors being socketed at the ground connection of the casing of the second phase of side and the oscillograph acquisition office being electrically connected with HFCT sensors Discharge signal waveform is filtered Partial discharge signal waveform, and office is judged whether according to filtered Partial discharge signal waveform Portion's electric discharge phenomena, if so, the on high-tension side failure of transformer to be detected is insulation fault, if it is not, then transformer to be detected On high-tension side failure is winding deformation failure.
Preferably, it further includes：Return to execution unit；
Execution unit is returned to, for passing through numerical value of the parameter for changing operation impulse voltage generator to operating impulse voltage It is adjusted, and triggers surge voltage unit.
As can be seen from the above technical solutions, the present invention has the following advantages：
The present invention provides a kind of Diagnosis Method of Transformer Faults, including：S1：By impulse voltage generator to be detected First phase of the low-pressure side of the delta connection of transformer applies operating impulse voltage；S2：With in the high-pressure side of star-star connection with First corresponding phase of low-pressure side be the second phase, the oscillograph being electrically connected by the voltage input end of the first phase with low-pressure side The practical low-pressure side voltage waveform of transformer to be detected is obtained, by being electrically connected on high-tension side second phase non-neutral point connecting pin Oscillograph obtain the actual high-voltage side voltage waveform of transformer to be detected, pass through the oscillograph being electrically connected with high-pressure side neutral point Obtain transformer to be detected shows that hindering actually showing for resistance hinders electric current；S3：To practical low-pressure side voltage waveform, actual high-voltage side electricity Corrugating and actually show that hindering electric current is handled, obtain respectively practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and Actually show the wave front time for hindering electric current, wave rear time and frequency of oscillation；S4：By practical low-pressure side voltage waveform, actual high-voltage side Voltage waveform and actually show that same operation is rushed in the wave front time for hindering electric current, wave rear time and frequency of oscillation and historical test data When hitting the corresponding normal low-pressure side voltage of voltage, normal high side voltage waveform and normally showing the wave front time for hindering electric current, wave rear Between and frequency of oscillation compared one by one and calculate practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and reality respectively Show the wave front time deviation percent for hindering electric current, wave rear time deviation percentage and oscillation frequency deviation percentage, judge whether Practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually show that the wave front time deviation percent for hindering electric current is smaller than First preset threshold value and practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually show that the wave rear time for hindering electric current is inclined Poor percentage be smaller than the second preset threshold value and practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually show wound electricity The oscillation frequency deviation percentage of stream is smaller than third preset threshold value, if it is not, then there are failures for transformer to be detected.
The present invention applies operating impulse voltage by the low-pressure side in transformer to be detected, and sensing can be caused in high-pressure side Formula oscillating operation wave, operating impulse voltage and induction type oscillating operation wave can detect transformation to be detected with simulated operation overvoltage The tolerance to switching overvoltage of device, by detecting practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and reality Border show hinder electric current and by its in historical test data normal low-pressure side voltage, normal high side voltage waveform and normally show wound Electric current, which is compared, to be solved with accurate judgement transformer to be detected currently with the presence or absence of failure in super extra-high voltage system The technical issues of electric power transformer to be detected carries out efficient diagnosis.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also To obtain other attached drawings according to these attached drawings.
Fig. 1 is that a kind of flow of one embodiment of Diagnosis Method of Transformer Faults provided in an embodiment of the present invention is illustrated Figure；
Fig. 2 is that a kind of flow of another embodiment of Diagnosis Method of Transformer Faults provided in an embodiment of the present invention is illustrated Figure；
Fig. 3 is a kind of structural representation of one embodiment of transformer fault diagnosis device provided in an embodiment of the present invention Figure.
Specific embodiment
An embodiment of the present invention provides a kind of Diagnosis Method of Transformer Faults and devices, solve in super extra-high voltage system Electric power transformer to be detected the technical issues of carrying out efficient diagnosis.
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention Attached drawing in embodiment is clearly and completely described the technical solution in the embodiment of the present invention, it is clear that disclosed below Embodiment be only part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this field All other embodiment that those of ordinary skill is obtained without making creative work, belongs to protection of the present invention Range.
Referring to Fig. 1, an embodiment of the present invention provides a kind of one embodiment of Diagnosis Method of Transformer Faults, including：
Step 101：By impulse voltage generator to the first phase of the low-pressure side of the delta connection of transformer to be detected Apply operating impulse voltage；
It should be noted that using the phase to be detected of transformer to be detected as the first phase, treated by impulse voltage generator The first phase for detecting the low-pressure side of the delta connection of transformer applies operating impulse voltage.
Step 102：Using in the high-pressure side of star-star connection with the first corresponding phase of low-pressure side as the second phase, by with it is low The oscillograph of the voltage input end electrical connection of the first phase of side is pressed to obtain the practical low-pressure side voltage waveform of transformer to be detected, is led to Cross the actual high-voltage side electricity that the oscillograph being electrically connected on high-tension side second phase non-neutral point connecting pin obtains transformer to be detected Corrugating shows that hinders resistance actually shows wound electricity by what the oscillograph that is electrically connected with high-pressure side neutral point obtained transformer to be detected Stream；
Need the reality for obtaining transformer to be detected low it should be noted that carrying out comprehensive detection to transformer to be detected It presses side voltage waveform, actual high-voltage side voltage waveform and actually shows and hinder electric current；
Using in the high-pressure side of star-star connection with the first corresponding phase of low-pressure side as the second phase, pass through with low-pressure side The oscillograph of the voltage input end electrical connection of one phase obtains the practical low-pressure side voltage waveform of transformer to be detected, by with high pressure The oscillograph of the second phase non-neutral point connecting pin electrical connection of side obtains the actual high-voltage side voltage waveform of transformer to be detected, leads to That crosses that the oscillograph that is electrically connected with high-pressure side neutral point obtains transformer to be detected shows that hindering actually showing for resistance hinders electric current.
Step 103：Practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually showing is hindered at electric current Reason obtains practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually shows the wave front time for hindering electric current, wave rear respectively Time and frequency of oscillation；
It should be noted that practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually showing is hindered electric current into Row quantitative evaluation needs to practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually shows that hindering electric current is handled Obtain practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually show the wave front time for hindering electric current, the wave rear time and Frequency of oscillation.
Step 104：By practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and when actually showing the wavefront for hindering electric current Between, wave rear time and frequency of oscillation normal low-pressure side voltage corresponding with same operation surge voltage in historical test data, just Normal high side voltage waveform and normally show that the wave front time for hindering electric current, wave rear time and frequency of oscillation compare and distinguish one by one Calculate practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually showing hinder electric current wave front time deviation percent, Wave rear time deviation percentage and oscillation frequency deviation percentage judge whether practical low-pressure side voltage waveform, actual high-voltage side Voltage waveform and actually show that the wave front time deviation percent for hindering electric current is smaller than the first preset threshold value and practical low-pressure side voltage Waveform, actual high-voltage side voltage waveform and actually show the wave rear time deviation percentage for hindering electric current be smaller than the second preset threshold value and Practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually show that the oscillation frequency deviation percentage for hindering electric current is smaller than Third preset threshold value, if it is not, then performing step 105；
It should be noted that wave front time deviation percent corresponds to the first preset threshold value, wave rear time deviation percentage pair The second preset threshold value is answered, oscillation frequency deviation percentage corresponds to third preset threshold value.
Step 105：There are failures for transformer to be detected.
When detecting practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually showing the wavefront for hindering electric current Between deviation percent, wave rear time deviation percentage and oscillation frequency deviation percentage any one be more than corresponding preset threshold value When, then illustrate that there are failures for transformer to be detected.
The present embodiment applies operating impulse voltage by the low-pressure side in transformer to be detected, and sense can be caused in high-pressure side Formula oscillating operation wave is answered, operating impulse voltage and induction type oscillating operation wave can detect change to be detected with simulated operation overvoltage The tolerance to switching overvoltage of depressor, by detect practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and Actually show hinder electric current and by its in historical test data normal low-pressure side voltage, normal high side voltage waveform and normally show Hinder electric current and be compared and can be solved with accurate judgement transformer to be detected currently with the presence or absence of failure in super extra-high voltage system Electric power transformer to be detected the technical issues of carrying out efficient diagnosis.
It is above a kind of one embodiment of Diagnosis Method of Transformer Faults provided in an embodiment of the present invention, is this below Another embodiment of a kind of Diagnosis Method of Transformer Faults that inventive embodiments provide.
Referring to Fig. 2, an embodiment of the present invention provides a kind of another embodiment of Diagnosis Method of Transformer Faults, packet It includes：
Step 201：By impulse voltage generator to the first phase of the low-pressure side of the delta connection of transformer to be detected Apply operating impulse voltage；
It should be noted that voltage when being 750kV by the oscillating operation voltage peak applied in high-voltage winding positions 100% test voltage, the operating impulse voltage that when experiment applies then are represented and to be applied in high-voltage winding for 30% test voltage Peak value is the voltage of 225kV, and 50% test voltage represents will apply voltage of the peak value as 375kV in high-voltage winding, 80% examination Electrical verification pressure represents will apply voltage of the peak value as 600kV in high-voltage winding, apply as needed during actual tests and correspond to Operating impulse voltage.
Step 202：Using in the high-pressure side of star-star connection with the first corresponding phase of low-pressure side as the second phase, by with it is low The oscillograph of the voltage input end electrical connection of the first phase of side is pressed to obtain the practical low-pressure side voltage waveform of transformer to be detected, is led to Cross the actual high-voltage side electricity that the oscillograph being electrically connected on high-tension side second phase non-neutral point connecting pin obtains transformer to be detected Corrugating shows that hinders resistance actually shows wound electricity by what the oscillograph that is electrically connected with high-pressure side neutral point obtained transformer to be detected Stream；
It should be noted that due to including practical low-pressure side voltage waveform in the characteristic quantity of measurement, so according to treating The data that detection transformer measured after induction type oscillation mode switching impulse pressure test may determine that high-pressure side incessantly The state of insulation of winding can also detect the state of low-pressure side winding simultaneously.
Step 203：Practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually showing is hindered at electric current Reason obtains practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually shows the wave front time for hindering electric current, wave rear respectively Time and frequency of oscillation；
It should be noted that in order to practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually show wound electricity Stream carries out quantitative evaluation, hinders electric current to practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually showing respectively and carries out It handles and obtains respective wave front time, wave rear time and frequency of oscillation.
Step 204：By the wave front time of practical low-pressure side voltage waveform, wave rear time and frequency of oscillation and history test number It is carried out one by one according to the wave front time of the corresponding normal low-pressure side voltage of middle same operation surge voltage, wave rear time and frequency of oscillation Compare and calculate respectively wave front time deviation percent, wave rear time deviation percentage and the oscillation of practical low-pressure side voltage waveform Frequency departure percentage judges whether that the wave front time deviation percent of practical low-pressure side voltage waveform is less than the first preset threshold value And the wave rear time deviation percentage of practical low-pressure side voltage waveform is less than the second preset threshold value and practical low-pressure side voltage waveform Oscillation frequency deviation percentage be less than third preset threshold value, if so, perform step 205, if it is not, then performing step 206；
It should be noted that by the wave front time of practical low-pressure side voltage waveform, wave rear time and frequency of oscillation and history In test data wave front time, wave rear time and the frequency of oscillation of the corresponding normal low-pressure side voltage of same operation surge voltage into Row compares and calculates the wave front time deviation percent of practical low-pressure side voltage waveform respectively, wave rear time deviation percentage one by one With oscillation frequency deviation percentage；
According to the wave front time deviation percent, wave rear time deviation percentage and oscillation frequency of practical low-pressure side voltage waveform Rate deviation percent is the state that can determine whether low pressure winding.
Step 205：Show actual high-voltage side voltage waveform and actually the wave front time for hindering electric current, wave rear time and oscillation frequency Rate normal high side voltage waveform corresponding with same operation surge voltage in historical test data and normally show the wave for hindering electric current Preceding time, wave rear time and frequency of oscillation are compared and calculate actual high-voltage side voltage waveform respectively and actually show wound electricity one by one Wave front time deviation percent, wave rear time deviation percentage and the oscillation frequency deviation percentage of stream, judge whether practical height It presses side voltage waveform and actually shows that the wave front time deviation percent for hindering electric current is smaller than the first preset threshold value and actual high-voltage side Voltage waveform and actually show that the wave rear time deviation percentage for hindering electric current is smaller than the second preset threshold value and actual high-voltage side voltage Waveform and actually show that the oscillation frequency deviation percentage for hindering electric current is smaller than third preset threshold value, if so, step 207 is performed, If it is not, then perform step 208；
It should be noted that due to being assessed by actual high-voltage side voltage waveform there may be deviation merely, High-pressure side combines actual high-voltage side voltage waveform and actually shows that hindering electric current is assessed；
Show actual high-voltage side voltage waveform and actually the wave front time for hindering electric current, wave rear time and frequency of oscillation and history The corresponding normal high side voltage waveform of same operation surge voltage and normally show the wave front time for hindering electric current, wave in test data Tail time and frequency of oscillation are compared and calculate actual high-voltage side voltage waveform respectively and actually show the wavefront of hindering electric current one by one Time deviation percentage, wave rear time deviation percentage and oscillation frequency deviation percentage；
Show according to actual high-voltage side voltage waveform and actually the wave front time deviation percent for hindering electric current, wave rear time deviation Percentage and oscillation frequency deviation percentage are the state that can determine whether high-voltage winding.
Step 206：Show actual high-voltage side voltage waveform and actually the wave front time for hindering electric current, wave rear time and oscillation frequency Rate normal high side voltage waveform corresponding with same operation surge voltage in historical test data and normally show the wave for hindering electric current Preceding time, wave rear time and frequency of oscillation are compared and calculate actual high-voltage side voltage waveform respectively and actually show wound electricity one by one Wave front time deviation percent, wave rear time deviation percentage and the oscillation frequency deviation percentage of stream, judge whether practical height It presses side voltage waveform and actually shows that the wave front time deviation percent for hindering electric current is smaller than the first preset threshold value and actual high-voltage side Voltage waveform and actually show that the wave rear time deviation percentage for hindering electric current is smaller than the second preset threshold value and actual high-voltage side voltage Waveform and actually show that the oscillation frequency deviation percentage for hindering electric current is smaller than third preset threshold value, if so, step 209 is performed, If it is not, then perform step 210；
It should be noted that due to being assessed by actual high-voltage side voltage waveform there may be deviation merely, High-pressure side combines actual high-voltage side voltage waveform and actually shows that hindering electric current is assessed；
Show actual high-voltage side voltage waveform and actually the wave front time for hindering electric current, wave rear time and frequency of oscillation and history The corresponding normal high side voltage waveform of same operation surge voltage and normally show the wave front time for hindering electric current, wave in test data Tail time and frequency of oscillation are compared and calculate actual high-voltage side voltage waveform respectively and actually show the wavefront of hindering electric current one by one Time deviation percentage, wave rear time deviation percentage and oscillation frequency deviation percentage；
Show according to actual high-voltage side voltage waveform and actually the wave front time deviation percent for hindering electric current, wave rear time deviation Percentage and oscillation frequency deviation percentage are the state that can determine whether high-voltage winding.
Step 207：Transformer fault-free to be detected；
It should be noted that when every deviation percent of the high-pressure side of transformer to be detected and low-pressure side is no more than in advance When putting threshold value, then illustrate transformer fault-free.
Step 208：Transformer to be detected only has high-pressure side, and there are failures；
It should be noted that when transformer to be detected only has on high-tension side deviation percent to be more than preset threshold value, then say Bright transformer to be detected only has high-pressure side, and there are failures.
Step 209：Transformer to be detected only has low-pressure side, and there are failures；
It should be noted that when transformer to be detected only has the deviation percent of low-pressure side to be more than preset threshold value, then say Bright transformer to be detected only has low-pressure side, and there are failures.
Step 210：All there are failures for the low pressure side and high pressure side of transformer to be detected；
It should be noted that when transformer to be detected low pressure side and high pressure side there are deviation percent be more than preset threshold During value, then illustrating the low pressure side and high pressure side of transformer to be detected, there are failures.
Step 211：When the high-pressure side of transformer to be detected is there are during failure, pass through connecing for the casing of on high-tension side second phase The oscillograph for being located in the HFCT sensors of socket and being electrically connected with HFCT sensors obtains Partial discharge signal waveform, to Partial discharge signal wave Shape is filtered, and partial discharge phenomenon is judged whether according to filtered Partial discharge signal waveform, if so, performing step Rapid 212, if it is not, then performing step 213；
It should be noted that when the high-pressure side of transformer to be detected, there are during failure, need further detect to judge Fault type can obtain Partial discharge signal waveform by HFCT sensors and the oscillograph being electrically connected with HFCT sensors, play a game Discharge signal waveform is filtered, and filtering out ambient noise can judge whether later according to filtered Partial discharge signal waveform There are partial discharge phenomenons.
Step 212：The on high-tension side failure of transformer to be detected is insulation fault；
It should be noted that when filtered Partial discharge signal waveform, there are apparent Partial discharge signals, then illustrate change to be detected The on high-tension side failure of depressor is insulation fault.
Step 213：The on high-tension side failure of transformer to be detected is winding deformation failure；
It should be noted that when filtered Partial discharge signal waveform, there is no apparent Partial discharge signals, then illustrate to be detected The on high-tension side failure of transformer is winding deformation failure.
Step 214：The numerical value of operating impulse voltage is adjusted by the parameter for changing operation impulse voltage generator, And return to step 201.
Exist it should be noted that only applying the data that once-through operation surge voltage is likely to be obtained during actual tests Error, the parameter that can change operation impulse voltage generator apply different operating impulse voltage and are detected, can also be same The experiment of one operating impulse voltage is multiple.
The present embodiment applies operating impulse voltage by the low-pressure side in transformer to be detected, and sense can be caused in high-pressure side Formula oscillating operation wave is answered, operating impulse voltage and induction type oscillating operation wave can detect change to be detected with simulated operation overvoltage The tolerance to switching overvoltage of depressor, by detect practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and Actually show hinder electric current and by its in historical test data normal low-pressure side voltage, normal high side voltage waveform and normally show Hinder electric current and be compared and can be solved with accurate judgement transformer to be detected currently with the presence or absence of failure in super extra-high voltage system Electric power transformer to be detected the technical issues of carrying out efficient diagnosis.
Be above another embodiment of a kind of Diagnosis Method of Transformer Faults provided in an embodiment of the present invention, below for A kind of one embodiment of transformer fault diagnosis device provided in an embodiment of the present invention.
Referring to Fig. 3, an embodiment of the present invention provides a kind of one embodiment of transformer fault diagnosis device, including：
Surge voltage unit 301, for passing through impulse voltage generator to the low of the delta connection of transformer to be detected The first phase of side is pressed to apply operating impulse voltage；
Practical acquiring unit 302, in the high-pressure side using star-star connection with the first corresponding phase of low-pressure side as Two-phase obtains the practical low pressure of transformer to be detected by the oscillograph that the voltage input end of the first phase with low-pressure side is electrically connected Side voltage waveform obtains transformer to be detected by the oscillograph being electrically connected on high-tension side second phase non-neutral point connecting pin Actual high-voltage side voltage waveform hinders resistance by oscillograph acquisition the showing for transformer to be detected being electrically connected with high-pressure side neutral point Actually show and hinder electric current；
Actual treatment unit 303, for showing to practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually wound Electric current is handled, and is obtained practical low-pressure side voltage waveform, actual high-voltage side voltage waveform respectively and is actually shown the wave for hindering electric current Preceding time, wave rear time and frequency of oscillation；
Contrast judgement unit 304, for showing practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually wound Wave front time, wave rear time and the frequency of oscillation of electric current are corresponding with same operation surge voltage in historical test data normal low It presses side voltage, normal high side voltage waveform and normally shows that the wave front time for hindering electric current, wave rear time and frequency of oscillation carry out one One compares and calculates practical low-pressure side voltage waveform, actual high-voltage side voltage waveform respectively and actually show the wave front time for hindering electric current Deviation percent, wave rear time deviation percentage and oscillation frequency deviation percentage, judge whether practical low-pressure side voltage waveform, Actual high-voltage side voltage waveform and actually show that the wave front time deviation percent for hindering electric current is smaller than the first preset threshold value and reality Low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually show that the wave rear time deviation percentage for hindering electric current is smaller than second Preset threshold value and practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually show the oscillation frequency deviation hundred for hindering electric current Divide than being smaller than third preset threshold value, if it is not, then there are failures for transformer to be detected.
Further, contrast judgement unit 304 specifically includes：
Low pressure comparison subunit 3041, for by the wave front time of practical low-pressure side voltage waveform, wave rear time and oscillation The wave front time of frequency normal low-pressure side voltage corresponding with same operation surge voltage in historical test data, the wave rear time and Frequency of oscillation is compared and calculates the wave front time deviation percent of practical low-pressure side voltage waveform, wave rear time respectively one by one Deviation percent and oscillation frequency deviation percentage judge whether the wave front time deviation percent of practical low-pressure side voltage waveform It is less than the second preset threshold value and reality less than the wave rear time deviation percentage of the first preset threshold value and practical low-pressure side voltage waveform The oscillation frequency deviation percentage of border low-pressure side voltage waveform is less than third preset threshold value, if so, the first higher pressure subsidiary list of triggering Member 3042, if it is not, then triggering the second high pressure subelement 3043；
First high pressure subelement 3042, for actual high-voltage side voltage waveform and actually showing is hindered the wave front time of electric current, Wave rear time and frequency of oscillation normal high side voltage waveform corresponding with same operation surge voltage in historical test data and Normally show that the wave front time for hindering electric current, wave rear time and frequency of oscillation are compared and calculate actual high-voltage side voltage respectively one by one Waveform and actually show the wave front time deviation percent for hindering electric current, wave rear time deviation percentage and oscillation frequency deviation percentage Than judging whether actual high-voltage side voltage waveform and actually to show that the wave front time deviation percent for hindering electric current is smaller than first preset Threshold value and actual high-voltage side voltage waveform and actually show that the wave rear time deviation percentage for hindering electric current is smaller than the second preset threshold value And actual high-voltage side voltage waveform and actually show that the oscillation frequency deviation percentage for hindering electric current is smaller than third preset threshold value, if It is, then transformer fault-free to be detected, if it is not, then transformer to be detected only has high-pressure side there are failures；
Second high pressure subelement 3043, for actual high-voltage side voltage waveform and actually showing is hindered the wave front time of electric current, Wave rear time and frequency of oscillation normal high side voltage waveform corresponding with same operation surge voltage in historical test data and Normally show that the wave front time for hindering electric current, wave rear time and frequency of oscillation are compared and calculate actual high-voltage side voltage respectively one by one Waveform and actually show the wave front time deviation percent for hindering electric current, wave rear time deviation percentage and oscillation frequency deviation percentage Than judging whether actual high-voltage side voltage waveform and actually to show that the wave front time deviation percent for hindering electric current is smaller than first preset Threshold value and actual high-voltage side voltage waveform and actually show that the wave rear time deviation percentage for hindering electric current is smaller than the second preset threshold value And actual high-voltage side voltage waveform and actually show that the oscillation frequency deviation percentage for hindering electric current is smaller than third preset threshold value, if It is that then transformer to be detected only has low-pressure side there are failure, if it is not, then the low pressure side and high pressure side of transformer to be detected all exists Failure.
Further, contrast judgement unit 304 further includes：Fault type subelement 3044；
Fault type subelement 3044, for when the high-pressure side of transformer to be detected is there are during failure, by high-tension side The HFCT sensors being socketed at the ground connection of the casing of second phase and the oscillograph being electrically connected with HFCT sensors obtain Partial discharge signal Waveform judges whether partial discharge phenomenon according to Partial discharge signal waveform, if so, the on high-tension side event of transformer to be detected Hinder for insulation fault, if it is not, then the on high-tension side failure of transformer to be detected is winding deformation failure.
Further, fault type subelement 3044, specifically for when the high-pressure side of transformer to be detected is there are during failure, Pass through the HFCT sensors being socketed at the ground connection of the casing of on high-tension side second phase and the oscillograph being electrically connected with HFCT sensors Partial discharge signal waveform is obtained, Partial discharge signal waveform is filtered, is judged whether according to filtered Partial discharge signal waveform There are partial discharge phenomenon, if so, the on high-tension side failure of transformer to be detected is insulation fault, if it is not, then change to be detected The on high-tension side failure of depressor is winding deformation failure.
Further, it further includes：Return to execution unit 305；
Execution unit is returned to, for passing through numerical value of the parameter for changing operation impulse voltage generator to operating impulse voltage It is adjusted, and triggers surge voltage unit.
It is above a kind of one embodiment of transformer fault diagnosis device provided in an embodiment of the present invention, is below this hair A kind of one application examples of Diagnosis Method of Transformer Faults that bright embodiment provides.
An application examples of a kind of Diagnosis Method of Transformer Faults provided in an embodiment of the present invention, including：
1st, it is corresponding just that 30% test voltage and the corresponding historical test data of 50% test voltage in historical data are obtained Normal low-pressure side voltage, normal high side voltage waveform and normally show the wave front time for hindering electric current, wave rear time and frequency of oscillation；
2nd, 30% test voltage, 50% test voltage and 80% test voltage are applied to transformer to be detected；
3rd, the wave front time of the practical low-pressure side voltage waveform of A phases is shorter than the wave front time of normal low-pressure side voltage, normal low The wave front time for pressing side voltage is 173.4 μ s, and the wave front time of practical low-pressure side voltage waveform is 150.6 μ s, with normal low pressure The wave front time of side voltage shortens 13.15% compared to 22.8 μ s are shortened；
There is above-mentioned analysis it is found that the state of A phase low pressure windings is changed, since this state change is in 30% impact Test voltage can just be reflected by low-pressure side voltage waveform, so this state change is not insulation defect, but it is short-circuit Impact causes transformer winding to be deformed；
4th, the parameter of A phases high side voltage waveform is as shown in table 1：
The parameter of 1 high side voltage waveform of table
As seen from Table 1, become with the wave front time of A phases high side voltage waveform under test voltage and frequency of oscillation without apparent Change, under 80% test voltage, the wave rear time of A phase actual high-voltages side voltage waveform than extending 120 μ s under other experimental conditions, Extend 11.46%.；
The efficiency of phase actual high-voltage side voltage waveform voltage magnitude reduces 0.04, reduces 4%；
As the above analysis, there is no apparent compared with the leakage inductance of A phase windings and high-pressure side equivalent capacity are when normal Change, the resistance of winding increases, but the wave front time of high side voltage waveform and frequency of oscillation are without significant change；
5th, A phases are practical show the Amplitude Ration short-circuit test for hindering the positive wave crest of second, electric current before increase 63.11%.Actually show Hinder electric current and normally show that hindering electric current compares, the different voltages frequency of oscillation shown below for hindering electric current does not change.
Due to actually showing that the difference for hindering electric current begins to occur under 30% test voltage, so leading to show that hindering electric current goes out The reason of now changing is high-pressure side winding deformation, and is unlikely to be hiding insulation defect (hiding insulation defect is relatively low It will not be highlighted under surge voltage)；
6th, apply 80% test voltage to A phases, when high side voltage reaches peak value (during about 150 μ s), detected in coil Partial discharge signal is arrived；
When test voltage is less than 80%, either historical test data or transformer test, A phases are in same time point All there is not Partial discharge signal in place；
The amplitude of Partial discharge signal is from 2.5-24.3V etc., discharge frequency 5-10MHz；
After being filtered, partial discharge is occurred mainly at first wave crest of high side voltage, it is believed that short-circuit test Afterwards under the action of 80% test voltage, the insulation defect hidden in A phase high-voltage windings exposes out, and part has occurred and puts Electricity；
I.e. by the A phases of 30% test voltage acquisition transformer to be detected, there are winding deformations, pass through 80% test voltage It obtains transformer to be tested and also there is hiding insulation defect.
The present embodiment applies operating impulse voltage by the low-pressure side in transformer to be detected, and sense can be caused in high-pressure side Formula oscillating operation wave is answered, operating impulse voltage and induction type oscillating operation wave can detect change to be detected with simulated operation overvoltage The tolerance to switching overvoltage of depressor, by detect practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and Actually show hinder electric current and by its in historical test data normal low-pressure side voltage, normal high side voltage waveform and normally show Hinder electric current and be compared and can failure currently whether there is with accurate judgement transformer to be detected；
And because the data being detected further include the practical low-pressure side voltage waveform of transformer to be detected, therefore not only Failure existing for the high-pressure side winding of transformer to be detected can only be detected, can also detect the low-pressure side of transformer to be detected around Failure existing for group solves the technical issues of carrying out efficient diagnosis to the electric power transformer to be detected in super extra-high voltage system.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description, The specific work process of device and unit can refer to the corresponding process in preceding method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the division of unit, Only a kind of division of logic function, can there is an other dividing mode in actual implementation, such as multiple units or component can be with With reference to or be desirably integrated into another system or some features can be ignored or does not perform.Another point, it is shown or discussed Mutual coupling, direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING of device or unit or Communication connection can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separate, be shown as unit Component may or may not be physical unit, you can be located at a place or can also be distributed to multiple networks On unit.Some or all of unit therein can be selected according to the actual needs to realize the purpose of this embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also That each unit is individually physically present, can also two or more units integrate in a unit.Above-mentioned integrated list The form that hardware had both may be used in member is realized, can also be realized in the form of SFU software functional unit.
If integrated unit realized in the form of SFU software functional unit and be independent product sale or in use, can To be stored in a computer read/write memory medium.Based on such understanding, technical scheme of the present invention substantially or Saying all or part of the part contribute to the prior art or the technical solution can be embodied in the form of software product Out, which is stored in a storage medium, is used including some instructions so that a computer equipment (can be personal computer, server or the network equipment etc.) performs all or part of each embodiment method of the present invention Step.And aforementioned storage medium includes：It is USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random Access various Jie that can store program code such as memory (RAM, Random Access Memory), magnetic disc or CD Matter.
More than, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to aforementioned reality Example is applied the present invention is described in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each Technical solution recorded in embodiment modifies or carries out equivalent replacement to which part technical characteristic；And these are changed Or it replaces, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.

Claims (10)

1. a kind of Diagnosis Method of Transformer Faults, which is characterized in that including：
S1：Operation punching is applied to the first phase of the low-pressure side of the delta connection of transformer to be detected by impulse voltage generator Hit voltage；
S2：Using in the high-pressure side of star-star connection with the first corresponding phase of low-pressure side as the second phase, pass through with low-pressure side The oscillograph of the voltage input end electrical connection of one phase obtains the practical low-pressure side voltage waveform of transformer to be detected, by with high pressure The oscillograph of the second phase non-neutral point connecting pin electrical connection of side obtains the actual high-voltage side voltage waveform of transformer to be detected, leads to That crosses that the oscillograph that is electrically connected with high-pressure side neutral point obtains transformer to be detected shows that hindering actually showing for resistance hinders electric current；
S3：Show to practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and that actually hindering electric current is handled, and obtains respectively Practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually show the wave front time for hindering electric current, wave rear time and oscillation Frequency；
S4：By practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and when actually showing the wave front time for hindering electric current, wave rear Between and frequency of oscillation normal low-pressure side voltage corresponding with same operation surge voltage in historical test data, normal high-pressure side electricity Corrugating and normally show that the wave front time for hindering electric current, wave rear time and frequency of oscillation are compared and calculated respectively practical low one by one It presses side voltage waveform, actual high-voltage side voltage waveform and actually shows that the wave front time deviation percent for hindering electric current, wave rear time are inclined Poor percentage and oscillation frequency deviation percentage, judge whether practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and Actually show that the wave front time deviation percent for hindering electric current is smaller than the first preset threshold value and practical low-pressure side voltage waveform, practical height It presses side voltage waveform and actually shows that the wave rear time deviation percentage for hindering electric current is smaller than the second preset threshold value and practical low-pressure side Voltage waveform, actual high-voltage side voltage waveform and actually show that the oscillation frequency deviation percentage for hindering electric current is smaller than the preset threshold of third Value, if it is not, then there are failures for transformer to be detected.
2. a kind of Diagnosis Method of Transformer Faults according to claim 1, which is characterized in that step S4 is specifically included：
S41：The wave front time of practical low-pressure side voltage waveform, wave rear time and frequency of oscillation is identical with historical test data Wave front time, wave rear time and the frequency of oscillation of the corresponding normal low-pressure side voltage of operating impulse voltage compare one by one and are divided Not Ji Suan practical low-pressure side voltage waveform wave front time deviation percent, wave rear time deviation percentage and oscillation frequency deviation Percentage judges whether that the wave front time deviation percent of practical low-pressure side voltage waveform is less than the first preset threshold value and practical low The wave rear time deviation percentage of side voltage waveform is pressed to be less than the oscillation frequency of the second preset threshold value and practical low-pressure side voltage waveform Rate deviation percent is less than third preset threshold value, if so, step S42 is performed, if it is not, then performing step S43；
S42：Show actual high-voltage side voltage waveform and actually the wave front time for hindering electric current, wave rear time and frequency of oscillation and history The corresponding normal high side voltage waveform of same operation surge voltage and normally show the wave front time for hindering electric current, wave in test data Tail time and frequency of oscillation are compared and calculate actual high-voltage side voltage waveform respectively and actually show the wavefront of hindering electric current one by one Time deviation percentage, wave rear time deviation percentage and oscillation frequency deviation percentage judge whether actual high-voltage side voltage Waveform and actually show that the wave front time deviation percent for hindering electric current is smaller than the first preset threshold value and actual high-voltage side voltage waveform Actually show that the wave rear time deviation percentage for hindering electric current is smaller than the second preset threshold value and actual high-voltage side voltage waveform and reality Border shows that the oscillation frequency deviation percentage for hindering electric current is smaller than third preset threshold value, if so, transformer fault-free to be detected, if No, then transformer to be detected only has high-pressure side there are failures；
S43：Show actual high-voltage side voltage waveform and actually the wave front time for hindering electric current, wave rear time and frequency of oscillation and history The corresponding normal high side voltage waveform of same operation surge voltage and normally show the wave front time for hindering electric current, wave in test data Tail time and frequency of oscillation are compared and calculate actual high-voltage side voltage waveform respectively and actually show the wavefront of hindering electric current one by one Time deviation percentage, wave rear time deviation percentage and oscillation frequency deviation percentage judge whether actual high-voltage side voltage Waveform and actually show that the wave front time deviation percent for hindering electric current is smaller than the first preset threshold value and actual high-voltage side voltage waveform Actually show that the wave rear time deviation percentage for hindering electric current is smaller than the second preset threshold value and actual high-voltage side voltage waveform and reality Border shows that the oscillation frequency deviation percentage for hindering electric current is smaller than third preset threshold value, if so, transformer to be detected only has low pressure Side is there are failure, if it is not, then all there are failures for the low pressure side and high pressure side of transformer to be detected.
3. a kind of Diagnosis Method of Transformer Faults according to claim 2, which is characterized in that step S4 is further included：Step S44；
S44：When the high-pressure side of transformer to be detected is there are during failure, passes through and be socketed at the ground connection of the casing of on high-tension side second phase HFCT sensors and the oscillograph that is electrically connected with HFCT sensors obtain Partial discharge signal waveform, judged according to Partial discharge signal waveform With the presence or absence of partial discharge phenomenon, if so, the on high-tension side failure of transformer to be detected is insulation fault, if it is not, then to be checked The on high-tension side failure for surveying transformer is winding deformation failure.
4. a kind of Diagnosis Method of Transformer Faults according to claim 3, which is characterized in that step S44 is specifically included：
When the high-pressure side of transformer to be detected, there are during failure, pass through socket at the ground connection of the casing of on high-tension side second phase HFCT sensors and the oscillograph being electrically connected with HFCT sensors obtain Partial discharge signal waveform, and Partial discharge signal waveform is filtered Processing, judges whether partial discharge phenomenon, if so, the height of transformer to be detected according to filtered Partial discharge signal waveform The failure for pressing side is insulation fault, if it is not, then the on high-tension side failure of transformer to be detected is winding deformation failure.
5. a kind of Diagnosis Method of Transformer Faults according to claim 1, which is characterized in that further included after step S4：Step S5；
S5：The numerical value of operating impulse voltage is adjusted by the parameter for changing operation impulse voltage generator, and returns to step Rapid S1.
6. a kind of transformer fault diagnosis device, which is characterized in that including：
Surge voltage unit, for passing through impulse voltage generator to the of the low-pressure side of the delta connection of transformer to be detected One phase applies operating impulse voltage；
Practical acquiring unit, in the high-pressure side using star-star connection with the first corresponding phase of low-pressure side as the second phase, lead to Cross the practical low-pressure side voltage that the oscillograph being electrically connected with the voltage input end of the first phase of low-pressure side obtains transformer to be detected Waveform obtains the practical height of transformer to be detected by the oscillograph being electrically connected on high-tension side second phase non-neutral point connecting pin Side voltage waveform is pressed, the reality of resistance is hindered by showing for the oscillograph that be electrically connected with high-pressure side neutral point acquisition transformer to be detected Show and hinder electric current；
Actual treatment unit, for practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually showing is hindered electric current into Row processing, obtain practical low-pressure side voltage waveform respectively, actual high-voltage side voltage waveform and actually showing hinder electric current wave front time, Wave rear time and frequency of oscillation；
Contrast judgement unit, for showing practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually and hindering electric current Wave front time, wave rear time and frequency of oscillation normal low-pressure side electricity corresponding with same operation surge voltage in historical test data Pressure and normally shows that the wave front time for hindering electric current, wave rear time and frequency of oscillation are compared one by one at normal high side voltage waveform And practical low-pressure side voltage waveform, actual high-voltage side voltage waveform are calculated respectively and actually shows the wave front time deviation hundred for hindering electric current Divide ratio, wave rear time deviation percentage and oscillation frequency deviation percentage, judge whether practical low-pressure side voltage waveform, practical height It presses side voltage waveform and actually shows that the wave front time deviation percent for hindering electric current is smaller than the first preset threshold value and practical low-pressure side Voltage waveform, actual high-voltage side voltage waveform and actually show that the wave rear time deviation percentage for hindering electric current is smaller than the second preset threshold Value and practical low-pressure side voltage waveform, actual high-voltage side voltage waveform and actually showing hinder the oscillation frequency deviation percentage of electric current all Less than third preset threshold value, if it is not, then there are failures for transformer to be detected.
7. a kind of transformer fault diagnosis device according to claim 6, which is characterized in that contrast judgement unit specifically includes：
Low pressure comparison subunit, for by the wave front time of practical low-pressure side voltage waveform, wave rear time and frequency of oscillation with going through Wave front time, wave rear time and the frequency of oscillation of the corresponding normal low-pressure side voltage of same operation surge voltage in history test data It is compared one by one and calculates the wave front time deviation percent of practical low-pressure side voltage waveform respectively, wave rear time deviation percentage Than with oscillation frequency deviation percentage, judge whether practical low-pressure side voltage waveform wave front time deviation percent be less than first The wave rear time deviation percentage of preset threshold value and practical low-pressure side voltage waveform is less than the second preset threshold value and practical low-pressure side The oscillation frequency deviation percentage of voltage waveform is less than third preset threshold value, if so, the first high pressure subelement of triggering, if it is not, Then trigger the second high pressure subelement；
First high pressure subelement, for showing actual high-voltage side voltage waveform and actually the wave front time for hindering electric current, wave rear time Normal high side voltage waveform corresponding with same operation surge voltage in historical test data with frequency of oscillation and normally show wound Wave front time, wave rear time and the frequency of oscillation of electric current are compared and calculate actual high-voltage side voltage waveform and reality respectively one by one Border shows that the wave front time deviation percent for hindering electric current, wave rear time deviation percentage and oscillation frequency deviation percentage, judgement are No actual high-voltage side voltage waveform and actually show that the wave front time deviation percent for hindering electric current is smaller than the first preset threshold value and reality Border high side voltage waveform and actually show that the wave rear time deviation percentage for hindering electric current is smaller than the second preset threshold value and practical high It presses side voltage waveform and actually shows that the oscillation frequency deviation percentage for hindering electric current is smaller than third preset threshold value, if so, to be checked Transformer fault-free is surveyed, if it is not, then transformer to be detected only has high-pressure side there are failures；
Second high pressure subelement, for showing actual high-voltage side voltage waveform and actually the wave front time for hindering electric current, wave rear time Normal high side voltage waveform corresponding with same operation surge voltage in historical test data with frequency of oscillation and normally show wound Wave front time, wave rear time and the frequency of oscillation of electric current are compared and calculate actual high-voltage side voltage waveform and reality respectively one by one Border shows that the wave front time deviation percent for hindering electric current, wave rear time deviation percentage and oscillation frequency deviation percentage, judgement are No actual high-voltage side voltage waveform and actually show that the wave front time deviation percent for hindering electric current is smaller than the first preset threshold value and reality Border high side voltage waveform and actually show that the wave rear time deviation percentage for hindering electric current is smaller than the second preset threshold value and practical high It presses side voltage waveform and actually shows that the oscillation frequency deviation percentage for hindering electric current is smaller than third preset threshold value, if so, to be checked It surveys transformer and there was only low-pressure side there are failure, if it is not, then all there are failures for the low pressure side and high pressure side of transformer to be detected.
8. a kind of transformer fault diagnosis device according to claim 7, which is characterized in that contrast judgement unit further includes：Therefore Hinder sub-unit；
Fault type subelement, for when the high-pressure side of transformer to be detected is there are during failure, passing through on high-tension side second phase The HFCT sensors being socketed at the ground connection of casing and the oscillograph being electrically connected with HFCT sensors obtain Partial discharge signal waveform, according to Partial discharge signal waveform judges whether partial discharge phenomenon, if so, the on high-tension side failure of transformer to be detected is insulation Failure, if it is not, then the on high-tension side failure of transformer to be detected is winding deformation failure.
9. a kind of transformer fault diagnosis device according to claim 8, which is characterized in that fault type subelement, it is specific to use In when the high-pressure side of transformer to be detected is there are during failure, pass through the HFCT being socketed at the ground connection of the casing of on high-tension side second phase Sensor and the oscillograph being electrically connected with HFCT sensors obtain Partial discharge signal waveform, and place is filtered to Partial discharge signal waveform Reason, judges whether partial discharge phenomenon, if so, the high pressure of transformer to be detected according to filtered Partial discharge signal waveform The failure of side is insulation fault, if it is not, then the on high-tension side failure of transformer to be detected is winding deformation failure.
10. a kind of transformer fault diagnosis device according to claim 6, which is characterized in that further include：Return to execution unit；
Execution unit is returned to, for passing through numerical value progress of the parameter for changing operation impulse voltage generator to operating impulse voltage Adjustment, and trigger surge voltage unit.
CN201810233033.9A 2018-03-21 2018-03-21 Transformer fault diagnosis method and device Active CN108267660B (en)

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CN113419148A (en) * 2021-06-30 2021-09-21 深圳市准点仪器有限公司 Testing method for motor winding insulation
CN114384874A (en) * 2021-12-16 2022-04-22 江苏核电有限公司 Data processing method for judging electromagnetic sensitivity of instrument control signal of nuclear power plant

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