CN107907848A - detection method for electronic mutual inductor - Google Patents
detection method for electronic mutual inductor Download PDFInfo
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- CN107907848A CN107907848A CN201711019790.8A CN201711019790A CN107907848A CN 107907848 A CN107907848 A CN 107907848A CN 201711019790 A CN201711019790 A CN 201711019790A CN 107907848 A CN107907848 A CN 107907848A
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- 238000001514 detection method Methods 0.000 title claims abstract description 21
- 230000003287 optical effect Effects 0.000 claims abstract description 38
- 230000007257 malfunction Effects 0.000 claims abstract description 14
- 238000004891 communication Methods 0.000 claims description 15
- 230000002159 abnormal effect Effects 0.000 claims description 9
- 238000002474 experimental method Methods 0.000 claims description 9
- 230000008054 signal transmission Effects 0.000 claims description 6
- 239000013307 optical fiber Substances 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 5
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
Abstract
The present invention provides the detection method for electronic mutual inductor, belongs to electronic mutual inductor field, wherein, electronic mutual inductor is made of three mutual inductor body, collecting unit and combining unit components, and detection method includes：Obtain the analog voltage signal of mutual inductor body output, the first optical signal that collecting unit exports and the second optical signal that combining unit exports and the numerical sample point for obtaining the default quantity in three groups of output signals, three groups of signal output waveforms are built into based on three groups of digital sample points, itself and sample signal output waveform are compared respectively, judge whether mutual inductor body, collecting unit, combining unit are in malfunction.By testing respectively mutual inductor body, collecting unit, combining unit, and then mutual inductor body, collecting unit, the promptness of fixing a breakdown of combining unit are improved, reduce the potential faults of electronic mutual inductor.
Description
Technical field
The invention belongs to electronic mutual inductor field, the more particularly to detection method for electronic mutual inductor.
Background technology
Electronic mutual inductor was largely run in power grid in recent years, electronic mutual inductor generally by mutual inductor body,
Collecting unit and combining unit three parts composition.It is mutual to electronic type at present due to the limitation of the prior art and field condition
The detection method of sensor is that mutual inductor body, collecting unit and combining unit are detected in turn.
Accordingly, there exist the long problem of electronic mutual inductor trouble shooting time, causes electronic mutual inductor operation to there is peace
Full hidden danger.
The content of the invention
In order to solve shortcoming and defect existing in the prior art, the present invention provides by being included to electronic mutual inductor
Mutual inductor body, collecting unit and combining unit tested, and then improve testing efficiency, reduce electronic mutual inductor
Potential faults detection method.
In order to reach above-mentioned technical purpose, the present invention provides the detection method for electronic mutual inductor, electronic type are mutual
Sensor is made of three mutual inductor body, collecting unit and combining unit components, and the detection method includes：
Experiment power supply is connected with the input terminal of up-flow increasing apparatus, electronics is connected with the output terminal of up-flow increasing apparatus
Formula mutual inductor, the Current Voltage of experiment power supply output obtains analog voltage signal after up-flow increasing apparatus processing, by simulation electricity
Pressure signal is transmitted to collecting unit through mutual inductor body；
Analog voltage signal is converted into the first optical signal in collecting unit, by the first optical signal transmission to combining unit
The second optical signal is obtained, by the second optical signal transmission to the rear end equipment being connected with electronic mutual inductor；
Obtain the analog voltage signal of mutual inductor body output, the first optical signal of collecting unit output and merge single
Second optical signal of member output, obtains the number of default quantity from analog voltage signal, the first optical signal, the second optical signal respectively
It is worth sampled point, is built based on three groups of numerical sample points and believed with mutual inductor body, collecting unit, corresponding export of combining unit respectively
Number waveform；
The sample frequency of signal output waveform is obtained, the sine wave identical with sample frequency is chosen and exports signal as sample
Waveform, by sample signal output waveform respectively signal output waveform corresponding with mutual inductor body, collecting unit, combining unit into
Row contrast, judges whether mutual inductor body, collecting unit and combining unit are in malfunction according to comparing result.
Optionally, it is described that sample signal output waveform is corresponding with mutual inductor body, collecting unit, combining unit respectively
Signal output waveform is contrasted, and judges whether mutual inductor body, collecting unit and combining unit are according to comparing result
Malfunction, including：
Under the synchronization for obtaining mutual inductor body, collecting unit and the corresponding signal output waveform of combining unit respectively
Amplitude, the amplitude of the signal output waveform of mutual inductor body, collecting unit and combining unit and sample are exported into signal respectively
It is poor that amplitude under the synchronization of waveform is made, and obtains the signal output waveform of mutual inductor body and the width of sample signal output waveform
Signal output waveform and the difference in magnitude of sample signal output waveform and the signal output waveform of combining unit of value difference, collecting unit
With the difference in magnitude of sample signal output waveform；
Repeat the above steps, obtain the signal output waveform and sample signal output waveform of the mutual inductor body of default quantity
Difference in magnitude, formed first amplitude difference group, the signal output waveform for obtaining the collecting unit of default quantity is exported with sample
The difference in magnitude of signal waveform, is formed the second difference in magnitude group, obtain default quantity combining unit signal output waveform with
The difference in magnitude of sample signal output waveform, is formed the 3rd difference in magnitude group；
If the difference in magnitude to be determined in any difference in magnitude group all in the range of default error threshold, illustrate with it is to be determined
Signal output waveform corresponding to difference in magnitude is normal output signal waveform, and the component with normal output signal waveform is all in just
Normal state, or；
If at least one difference in magnitude to be determined in any difference in magnitude group illustrates not in the range of default error threshold
It is abnormal signal output waveform with the signal output waveform corresponding to difference in magnitude to be determined, corresponding to abnormal signal output waveform
Component be in malfunction.
Optionally, it is described that sample signal output waveform is corresponding with mutual inductor body, collecting unit, combining unit respectively
Before signal output waveform is contrasted, including：
Mutual inductor body, collecting unit, the corresponding signal output waveform of combining unit are adjusted respectively, make mutual inductor
Phase and sample signal output waveform under the corresponding signal output waveform synchronization of body, collecting unit, combining unit is same
The phase inscribed for the moment is identical.
Optionally, the first communication media is equipped between the mutual inductor body and collecting unit, the first communication media includes
Shielding line.
Optionally, the second communication media is equipped between the collecting unit and combining unit, the second communication media includes light
It is fine.
Optionally, the rear end equipment includes protective device, fault wave recording device, kilowatt-hour meter, Network Analyzer at least one
Kind.
The beneficial effect that technical solution provided by the invention is brought is：By respectively to mutual inductor body, collecting unit, conjunction
And unit is tested, and then mutual inductor body, collecting unit, the promptness of fixing a breakdown of combining unit are improved, reduced
The potential faults of electronic mutual inductor.
Embodiment
To make the structure of the present invention and advantage clearer, the structure of the present invention will be further described below.
Embodiment one
The present invention provides the detection method for electronic mutual inductor, and electronic mutual inductor is by mutual inductor body, collection
Three components of unit and combining unit are formed, and the detection method includes：
Experiment power supply is connected with the input terminal of up-flow increasing apparatus, electronics is connected with the output terminal of up-flow increasing apparatus
Formula mutual inductor, the Current Voltage of experiment power supply output obtains analog voltage signal after up-flow increasing apparatus processing, by simulation electricity
Pressure signal is transmitted to collecting unit through mutual inductor body；
Analog voltage signal is converted into the first optical signal in collecting unit, by the first optical signal transmission to combining unit
The second optical signal is obtained, by the second optical signal transmission to the rear end equipment being connected with electronic mutual inductor；
Obtain the analog voltage signal of mutual inductor body output, the first optical signal of collecting unit output and merge single
Second optical signal of member output, obtains the number of default quantity from analog voltage signal, the first optical signal, the second optical signal respectively
It is worth sampled point, is built based on three groups of numerical sample points and believed with mutual inductor body, collecting unit, corresponding export of combining unit respectively
Number waveform；
The sample frequency of signal output waveform is obtained, the sine wave identical with sample frequency is chosen and exports signal as sample
Waveform, by sample signal output waveform respectively signal output waveform corresponding with mutual inductor body, collecting unit, combining unit into
Row contrast, judges whether mutual inductor body, collecting unit and combining unit are in malfunction according to comparing result.
In force, as described above, electronic mutual inductor includes mutual inductor body, collecting unit and combining unit,
Mutual inductor body is installed in GIS (Gas Insulated Switchgear, gas-insulated switchgear) housing, collection is single
Member is installed on vasculum, and combining unit installs observing and controlling cabinet outdoors；
In order to improve testing efficiency, using mutual inductor body, collecting unit, combining unit at the same time as measurand, and will
Homologous reference signal of the test signal that mutual inductor ontology acquisition arrives as all measurands.In up-flow increasing apparatus to experiment
In the case of the output current of power supply, voltage have carried out up-flow boosting, first, mutual inductor body is made to be obtained from up-flow increasing apparatus
Collecting unit is transmitted to analog voltage signal, and by analog voltage signal, collecting unit carries out a system to analog voltage signal
Analog voltage signal, is first filtered by column processing, then filtered analog voltage signal is converted into digital voltage signal, then
Digital voltage signal is converted into be transmitted to combining unit after the first optical signal, combining unit integrates it, obtains second
Optical signal, and the second optical signal is transmitted to rear end equipment according to the regulation of IEC61850-9-2 standards；
Then, the analog voltage signal of mutual inductor body output, the first optical signal of collecting unit output, merging list are obtained
Second optical signal of member output, obtains default quantity not from analog voltage signal, the first optical signal, the second optical signal respectively
Numerical sample point under in the same time, according to experiment needs, the quantity of numerical sample point is generally 200~400, based on three groups of numbers
Value sampled point builds signal output waveform corresponding with mutual inductor body, collecting unit, combining unit by fitting algorithm respectively；
Finally, the sample frequency of signal output waveform is obtained, it is defeated as sample to choose the sine wave identical with sample frequency
Go out signal waveform, by sample signal output waveform output signal corresponding with mutual inductor body, collecting unit, combining unit respectively
Waveform is contrasted, if to show that any one group of signal output waveform exists with sample signal output waveform poor for comparing result
It is different, then this group of signal output waveform is judged for abnormal signal output waveform, i.e., corresponding to judgement and this group of signal output waveform
Component is in malfunction, and then rapidly can carry out fault location to there is the electronic mutual inductor of " problem ", shortens
Fault correction time.
Above-mentioned detection method, by testing respectively mutual inductor body, collecting unit, combining unit, improves mutually
Sensor body, collecting unit, the promptness of fixing a breakdown of combining unit, and then improve the overall applicability water of electronic mutual inductor
It is flat, reduce the potential faults of electronic mutual inductor.
Optionally, it is described that sample signal output waveform is corresponding with mutual inductor body, collecting unit, combining unit respectively
Signal output waveform is contrasted, and judges whether mutual inductor body, collecting unit and combining unit are according to comparing result
Malfunction, including：
Under the synchronization for obtaining mutual inductor body, collecting unit and the corresponding signal output waveform of combining unit respectively
Amplitude, the amplitude of the signal output waveform of mutual inductor body, collecting unit and combining unit and sample are exported into signal respectively
It is poor that amplitude under the synchronization of waveform is made, and obtains the signal output waveform of mutual inductor body and the width of sample signal output waveform
Signal output waveform and the difference in magnitude of sample signal output waveform and the signal output waveform of combining unit of value difference, collecting unit
With the difference in magnitude of sample signal output waveform；
Repeat the above steps, obtain the signal output waveform and sample signal output waveform of the mutual inductor body of default quantity
Difference in magnitude, formed first amplitude difference group, the signal output waveform for obtaining the collecting unit of default quantity is exported with sample
The difference in magnitude of signal waveform, is formed the second difference in magnitude group, obtain default quantity combining unit signal output waveform with
The difference in magnitude of sample signal output waveform, is formed the 3rd difference in magnitude group；
If the difference in magnitude to be determined in any difference in magnitude group all in the range of default error threshold, illustrate with it is to be determined
Signal output waveform corresponding to difference in magnitude is normal output signal waveform, and the component with normal output signal waveform is all in just
Normal state, or；
If at least one difference in magnitude to be determined in any difference in magnitude group illustrates not in the range of default error threshold
It is abnormal signal output waveform with the signal output waveform corresponding to difference in magnitude to be determined, corresponding to abnormal signal output waveform
Component be in malfunction.
In force, according to experiment demand, every group of difference in magnitude group generally comprise 20~30 at different moments under difference in magnitude,
Wherein, preset error threshold scope and be set to [- 0.25,0.25], first, by taking mutual inductor body as an example, obtain 25 collecting units
Signal output waveform and sample signal output waveform difference in magnitude, all difference in magnitude all default error threshold scope [-
0.25,0.25] in, then the signal output waveform for illustrating mutual inductor body is normal output signal waveform, that is, judges mutual inductor sheet
Body is in normal condition.
By taking collecting unit as an example, the signal output waveform of 25 collecting units and the amplitude of sample signal output waveform are obtained
Difference, one of difference in magnitude are 0.5, according to difference in magnitude for 0.5 not in default error threshold scope [- 0.25,0.25], then
The signal output waveform for illustrating collecting unit is abnormal signal output waveform, that is, judges that collecting unit is in malfunction, and then
In order to which service personnel is overhauled.
If signal output waveform belongs to abnormal signal output waveform, and then judges corresponding with both signal output waveforms
Component be in malfunction.
Optionally, it is described that sample signal output waveform is corresponding with mutual inductor body, collecting unit, combining unit respectively
Before signal output waveform is contrasted, including：
Mutual inductor body, collecting unit, the corresponding signal output waveform of combining unit are adjusted respectively, make mutual inductor
Phase and sample signal output waveform under the corresponding signal output waveform synchronization of body, collecting unit, combining unit is same
The phase inscribed for the moment is identical.
In force, the same of the corresponding signal output waveform of mutual inductor body and sample signal output waveform is obtained respectively
When the phase inscribed, the phase of the phase of the corresponding signal output waveform of mutual inductor body and sample signal output waveform is made
Difference, obtains phase difference, by the corresponding signal output waveform of mutual inductor body plus or minus phase difference, finally causes mutual inductor sheet
The phase of the corresponding signal output waveform of body is identical with the phase of sample signal output waveform.
In addition, make the phase under the corresponding signal output waveform synchronization of collecting unit, combining unit and sample output
Phase under signal waveform synchronization is identical, the phase mode of signal output waveform corresponding with above-mentioned adjustment mutual inductor body
It is identical, do not repeat again herein.
Optionally, the first communication media is equipped between the mutual inductor body and collecting unit, the first communication media includes
Shielding line.
In force, the effect of shielding line is the interference of transmission signal in the outer bound pair conducting wire of shielding, due to from mutual inductor sheet
The analog voltage signal that body is transmitted to collecting unit is vulnerable to external interference in intelligent substation content, therefore, in mutual inductor sheet
First communication media of body and collecting unit includes shielding line, it ensure that analog voltage signal is accurate in transmitting procedure
Property.
Optionally, the second communication media is equipped between the collecting unit and combining unit, the second communication media includes light
It is fine.
In force, optical fiber is suitable for transmission optical signal, and small, transmission speed is lost in its transmitting procedure soon and from electricity
Magnetic disturbance.The analog voltage signal that collecting unit exports mutual inductor body changes the first optical signal, and the first optical signal is passed
Transport to combining unit.Therefore, optical fiber is included in collecting unit and the second communication media of combining unit.It both ensure that the first light
The accuracy of signal, and improve the speed of the communications of collecting unit and combining unit.Wherein, optical fiber ripple in the present embodiment
A length of 850nm.
Optionally, the rear end equipment includes protective device, fault wave recording device, kilowatt-hour meter, Network Analyzer at least one
Kind.
In force, electronic mutual inductor is the basic equipment of electric system current-voltage measurement, for for rear end equipment
Electric current, voltage signal are provided, wherein, rear end equipment includes protective device, fault wave recording device, kilowatt-hour meter, Network Analyzer etc..
The present invention provides the detection method for electronic mutual inductor, and electronic mutual inductor is by mutual inductor body, collection
Three components of unit and combining unit are formed, and detection method includes：Obtain analog voltage signal, the collection of mutual inductor body output
The second optical signal and obtain pre- in three groups of output signals that the first optical signal and combining unit of unit output export
If the numerical sample point of quantity, three groups of signal output waveforms are built into based on three groups of digital sample points, it is respectively that it is defeated with sample
Go out signal waveform to compare, judge whether mutual inductor body, collecting unit, combining unit are in malfunction.By right respectively
Mutual inductor body, collecting unit, combining unit are tested, and then improve mutual inductor body, collecting unit, combining unit
Fix a breakdown promptness, reduce the potential faults of electronic mutual inductor.
Each sequence number in above-described embodiment is for illustration only, does not represent the elder generation during the assembling or use of each component
Order afterwards.
The foregoing is merely the embodiment of the present invention, is not intended to limit the invention, all in the spirit and principles in the present invention
Within, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention.
Claims (6)
1. for the detection method of electronic mutual inductor, electronic mutual inductor is by mutual inductor body, collecting unit and combining unit
Three components are formed, it is characterised in that the detection method includes：
Experiment power supply is connected with the input terminal of up-flow increasing apparatus, it is mutual to be connected with electronic type in the output terminal of up-flow increasing apparatus
Sensor, the Current Voltage of experiment power supply output obtain analog voltage signal, analog voltage are believed after up-flow increasing apparatus processing
Number it is transmitted to collecting unit through mutual inductor body；
Analog voltage signal is converted into the first optical signal in collecting unit, the first optical signal transmission to combining unit is obtained
Second optical signal, by the second optical signal transmission to the rear end equipment being connected with electronic mutual inductor；
It is defeated to obtain the analog voltage signal of mutual inductor body output, the first optical signal of collecting unit output and combining unit
The second optical signal gone out, the numerical value for obtaining default quantity from analog voltage signal, the first optical signal, the second optical signal respectively are adopted
Sampling point, output signal wave corresponding with mutual inductor body, collecting unit, combining unit is built based on three groups of numerical sample points respectively
Shape；
The sample frequency of signal output waveform is obtained, the sine wave identical with sample frequency is chosen and exports signal wave as sample
Shape, by sample signal output waveform, signal output waveform corresponding with mutual inductor body, collecting unit, combining unit carries out respectively
Contrast, judges whether mutual inductor body, collecting unit and combining unit are in malfunction according to comparing result.
2. the detection method according to claim 1 for electronic mutual inductor, it is characterised in that described to export sample
Signal output waveform corresponding with mutual inductor body, collecting unit, combining unit is contrasted signal waveform respectively, according to contrast
Whether result judgement mutual inductor body, collecting unit and combining unit are in malfunction, including：
The width under the synchronization of mutual inductor body, collecting unit and the corresponding signal output waveform of combining unit is obtained respectively
Value, respectively by the amplitude of the signal output waveform of mutual inductor body, collecting unit and combining unit and sample signal output waveform
Synchronization under amplitude make it is poor, obtain mutual inductor body signal output waveform and sample signal output waveform amplitude
The signal output waveform of difference, the signal output waveform of collecting unit and the difference in magnitude of sample signal output waveform and combining unit with
The difference in magnitude of sample signal output waveform；
Repeat the above steps, obtain the width of the signal output waveform and sample signal output waveform of the mutual inductor body of default quantity
Value difference, is formed first amplitude difference group, obtains the signal output waveform and sample output signal of the collecting unit of default quantity
The difference in magnitude of waveform, is formed the second difference in magnitude group, obtains the signal output waveform and sample of the combining unit of default quantity
The difference in magnitude of signal output waveform, is formed the 3rd difference in magnitude group；
If the difference in magnitude to be determined in any difference in magnitude group illustrates and amplitude to be determined all in the range of default error threshold
Signal output waveform corresponding to difference is normal output signal waveform, and the component with normal output signal waveform is all in normal shape
State, or；
If at least one difference in magnitude to be determined in any difference in magnitude group illustrates and treats not in the range of default error threshold
Judge that the signal output waveform corresponding to difference in magnitude is abnormal signal output waveform, with the portion corresponding to abnormal signal output waveform
Part is in malfunction.
3. the detection method according to claim 1 for electronic mutual inductor, it is characterised in that described to export sample
Signal waveform is before signal output waveform corresponding with mutual inductor body, collecting unit, combining unit is contrasted respectively, including：
Mutual inductor body, collecting unit, the corresponding signal output waveform of combining unit are adjusted respectively, make mutual inductor sheet
Phase and sample signal output waveform under the corresponding signal output waveform synchronization of body, collecting unit, combining unit is same
When the phase inscribed it is identical.
4. the detection method according to claim 1 for electronic mutual inductor, it is characterised in that the mutual inductor body
The first communication media is equipped between collecting unit, the first communication media includes shielding line.
5. the detection method according to claim 1 for electronic mutual inductor, it is characterised in that the collecting unit with
The second communication media is equipped between combining unit, the second communication media includes optical fiber.
6. the detection method according to claim 1 for electronic mutual inductor, it is characterised in that the rear end equipment bag
It is at least one to include protective device, fault wave recording device, kilowatt-hour meter, Network Analyzer.
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