CN208044005U - A kind of local discharge signal detecting system - Google Patents
A kind of local discharge signal detecting system Download PDFInfo
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- CN208044005U CN208044005U CN201820282032.9U CN201820282032U CN208044005U CN 208044005 U CN208044005 U CN 208044005U CN 201820282032 U CN201820282032 U CN 201820282032U CN 208044005 U CN208044005 U CN 208044005U
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- detection sensor
- pcb board
- loop line
- wiring
- local discharge
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Abstract
A kind of local discharge signal detecting system, including detection sensor, oscillometric signal unit, the signal processing terminal.The detection sensor includes pcb board, front wiring, back wiring, by the front wiring on pcb board, back wiring, is formed and measures wire turn, the front wiring, back wiring are connected using via.The detection sensor connection signal oscillography unit, the oscillometric signal unit connection signal processing terminal.The utility model substantially reduces the influence of the disturbing factors such as neighbouring wire magnetic fields, improves the accuracy of Partial Discharge Detection.Loop line design method is also different from the loop line design method of traditional PCB coil, and the loop area that the loop area that loop line is constituted is formed closer to coiling itself, to which compensation effect is more preferable, anti-interference ability is stronger.
Description
Technical field
A kind of local discharge signal detecting system of the utility model, for power equipment, including transformer, breaker,
The shelf depreciation state of mutual inductor etc. is measured in real time, to provide data supporting for status monitoring.
Background technology
Partial Discharge Detection is significant for the state of insulation for judging and assessing power equipment, therefore accurately detection
Local discharge signal becomes one of the important content of electric device maintenance.Currently used detection method for local discharge includes extra-high
Frequency method, supercritical ultrasonics technology, air core coil method etc..Air core coil method has that small, light weight and cost is low, it is excellent to measure bandwidth etc.
Point becomes one of the main method of current Partial Discharge Detection.However, the design of air core coil is to influence Partial Discharge Detection knot
The key point of fruit.Traditional wound formula air core coil is difficult to ensure wire turn uniformity, causes accuracy of measurement not high.Based on printing electricity
The air core coil of road plate technique (PCB) can ensure the uniformity of wire turn distribution, but in current pcb board wire laying mode, just
Face wiring is not parallel with back wiring, and each wire turn is caused to have the part of half and a wire center not point-blank,
To easily be disturbed factor influence.In addition, loop line design method can not compensate vertical direction magnetic interference well, cause defeated
It is larger to go out resultant error.
Chinese patent " CN105929313A " provides a kind of high-tension apparatus measurement of partial discharge air core coil sensor, adopts
Use air core coil as sensor.Air core coil uses coiling form, shielding to be respectively provided with shielding fracture on each circle, help
Frequency band is measured in increasing, however but reduces its interference free performance.Chinese patent " CN102495340A " provides one kind and is based on
Electromagnetism involves the power cable partial discharge monitoring system of high frequency CT, using broadband Rogowski coil current transformer
The monitoring of local discharge signal is carried out, coil rack material uses the rectangular section annular skeleton of MnZn ferrite material, tool
Play the role of collecting magnetic, is conducive to improve coil output signal value, however the effect of this MnZn ferrite material is similar to tradition electricity
The iron core of magnetic-type current transformer limits the dynamic range of coil and measures frequency band.
Invention content
Not high for sensor accuracy present in current Partial Discharge Detection, the easy factor that is disturbed influences, measures frequency band
The problems such as relatively low.The utility model provides a kind of local discharge signal detecting system, including detection sensor, oscillometric signal list
The problems such as parts such as member, software processing platform, detection sensor existing for current PCB air core coils for being easily disturbed, design
The mode that overlapping connects up is taken in a kind of air core coil of strong antijamming capability, the wiring of pcb board front and back so that wire turn
The extended line of plane and a wire center are on same straight line connecting line, to substantially reduce the interference such as wire magnetic fields nearby
The influence of factor improves the accuracy of Partial Discharge Detection.Loop line design method is designed also different from the loop line of traditional PCB coil
Mode, the loop area that the loop area that loop line is constituted is formed closer to coiling itself resist dry to which compensation effect is more preferable
It is stronger to disturb ability.
The technical solution that the utility model is taken is：
A kind of local discharge signal detecting system, including detection sensor, oscillometric signal unit, the signal processing terminal.
The detection sensor includes pcb board, front wiring, back wiring, passes through the front wiring on pcb board, the back side
Wiring forms and measures wire turn, and the front wiring, back wiring are connected using via.The detection sensor connection signal is shown
Wave unit, the oscillometric signal unit connection signal processing terminal.
The front wiring is Chong Die with back wiring, and almost all overlapping is connected up between the same wire turn is positive and negative, and wire turn is flat
The extended line in face and a center conducting wire L0 are on same straight line connecting line.Substantially reduce the disturbing factors such as wire magnetic fields nearby
Influence.Test data shows sensor wiring mode provided by the utility model, and by electromagnetic interference smaller, error is only
0.023%.The detection sensor includes the first loop line, the second loop line, and the radius of the first loop line is the half of pcb board coil inner ring
Diameter, the radius of the second loop line are the radius of pcb board coil outer ring.To which the loop area that entire loop line is constituted is returned with coiling itself
Road surface product is almost the same, and compared with common loop line design method at present, loop area that loop line is constituted is closer to coiling
The loop area that itself is formed, thus compensation effect is more preferable, sensor resistance to vertical direction interference performance is stronger.Test result table
Bright, vertical direction mushing error is less than 0.01%.
The pcb board is made using epoxide resin material, and pcb board constitutes the skeleton of detection sensor, skeleton thickness
The general pcb board using after 3mm makes, and internal-and external diameter can suitably be adjusted according to installation environment, so as to applied to different
Occasion.Detection sensor is mounted in endless metal shielding box, so as to effectively improve its anti-interference ability.
Include two pads on the pcb board, for welding shielded cable；The output of detection sensor signal is through shielding electricity
Cable sends oscillometric signal unit to, and oscillometric signal unit uses MDO4000C hybrid domain oscillographs, measures frequency band up to 1GHz,
Record points ensure that accurate acquisition and the wave of shelf depreciation high-frequency signal up to 20M, maximum sample rate up to maximum 5GS/s
Shape is shown.
Oscillometric signal unit output sends the signal processing terminal to through USB shielding lines, the signal processing terminal for pair
The local discharge signal data of oscillometric signal unit transmission carry out analyzing processing, data preservation, status assessment and early warning etc., work as hair
When now local discharge signal is larger, then early warning is carried out, staff's concern is prompted to be detected measurement equipment, carries out maintenance preparation in time.
The signal processing terminal uses Labview software programmings, cooperation Matlab programs to carry out data processing, can effectively improve data analysis
Accuracy.
Its size of the detection sensor can suitably be adjusted according to installation environment, thus application range is very extensive.
A kind of local discharge signal detecting system of the utility model, detection sensor use two kinds and are different from tradition biography
The design method of sensor：1) when connecting up, pcb board front wiring is Chong Die with back wiring, so its wire turn plane and lead location
In same plane, be conducive to enhance its anti-interference ability.Test result shows the design method by electromagnetic interference smaller,
Error is only 0.023%；2) loop line design method than traditional loop line design method closer to coiling loop area itself, thus
Compensation effect is more preferable, and the electromagnetic interference capability in resistance to vertical direction is stronger.
A kind of local discharge signal detecting system of the utility model, technique effect are as follows：
1) when, detection sensor connects up, pcb board front wiring is Chong Die with back wiring, so its wire turn plane and conducting wire
Position is in same plane, effectively enhances its anti-interference ability.
2) loop line design method provided by the utility model is designed using the design method in Fig. 3 (b) than traditional loop line
Mode is closer to coiling loop area itself, thus compensation effect is more preferable, and the electromagnetic interference capability in resistance to vertical direction is stronger.
3) it, is tested by the interference free performance to the utility model detection sensor, it can be seen that than common base
More preferable in the design method anti-jamming effectiveness of PCB air core coils, neighbouring conducting wire electromagnetic interference error is only 0.023%, Vertical Square
It is less than 0.01% to mushing error.
4) detection sensor, in the utility model is small, light-weight, size can be appropriately designed according to installation environment,
Thus application range is wider.
5), oscillometric signal unit is constituted using MDO4000C hybrid domain oscillographs, is measured frequency band up to 1GHz, is recorded point
For number up to 20M, maximum sample rate ensure that the accurate acquisition of shelf depreciation high-frequency signal and waveform are shown up to maximum 5GS/s.
6), the signal processing terminal uses Labview software programmings, cooperation Matlab programs to carry out data processing, can be effective
Improve data analysis accuracy.
Description of the drawings
Fig. 1 is the overall system architecture schematic diagram of the utility model.
Fig. 2 (a) is pcb board front wiring schematic diagram one；
Fig. 2 (b) is pcb board back wiring schematic diagram one；
Fig. 2 (c) is pcb board front wiring schematic diagram two；
Fig. 2 (d) is pcb board back wiring schematic diagram two；
Fig. 2 (e) is the pcb board front wiring schematic diagram of the utility model；
Fig. 2 (f) is the pcb board back wiring schematic diagram of the utility model.
Fig. 3 (a) is common sensor loop line design diagram.
Fig. 3 (b) is the detection sensor loop line design diagram in the utility model.
Fig. 4 is the schematic diagram that detection sensor is mounted on endless metal shielding box in the utility model.
Specific implementation mode
A kind of local discharge signal detecting system, including detection sensor 1, oscillometric signal unit 2, the signal processing terminal 3.
The detection sensor 1 includes pcb board 5, front wiring 6, back wiring 7, passes through the front wiring on pcb board 5
6, back wiring 7 form and measure wire turn, and the front wiring 6, back wiring 7 are connected using via.
It is with the currently used air core coil difference based on pcb board：In the utility model pcb board front wiring and
The mode that overlapping connects up is taken in back wiring, so that connecting up almost all overlapping between the same wire turn is positive and negative, wire turn is flat
The extended line in face and a wire center are on same straight line connecting line, to substantially reduce the interference such as wire magnetic fields nearby because
The influence of element, improves the accuracy of Partial Discharge Detection.The wire laying mode of the utility model pcb board such as Fig. 2 (e), Fig. 2 (f) institutes
Show.Its front wiring is Chong Die with back wiring, so its wire turn plane is in lead location in same plane, is conducive to enhance
Its anti-interference ability, error caused by neighbouring conducting wire electromagnetic interference is only 0.023%.
Shown in the wire laying mode of the utility model pcb board such as Fig. 2 (e), Fig. 2 (f).
Fig. 2 (a), Fig. 2 (b) front wirings extended line are overlapped with conducting wire position, but back wiring is misaligned, are had certain
Angle.
Fig. 2 (c), Fig. 2 (d) front wirings and back wiring extended line and conducting wire are misaligned.
Above two mode due to wire turn plane (square that front wiring and back wiring are constituted) with conducting wire not one
On straight line, there are certain angle, cause easily by electromagnetic interference.Design method provided by the utility model such as Fig. 2 (e), Fig. 2
(f) shown in, front wiring is Chong Die with back wiring, observes for convenience, Fig. 2 (e), Fig. 2 (f) have been staggered some intentionally.Therefore
And its wire turn plane is in lead location in same plane, is conducive to enhance its anti-interference ability.Test data such as 1 institute of table
Show, it can be seen that as Fig. 2 (e), Fig. 2 (f) design method by electromagnetic interference smaller, error is only 0.023%.
The detection sensor 1, shown in design method such as Fig. 3 (b) of loop line.The loop line mode one of generally use at present
As shown in Fig. 3 (a), using the first loop line 8 or the second loop line 8 ' in Fig. 3 (a).If using the first loop line 8, return
The loop area of line will be greater than the loop area of detection sensor coil coiling generation itself, generate overcompensation；Such as use second
Loop line 8 ', then the loop area of loop line be less than coiling loop area, cause compensation insufficient.Both modes will all lead to sensor
Easily interfered by perpendicular to pcb board in-plane.
This to solve the problems, such as, the utility model is using 8 " design method of third circuit, circuit face shown in Fig. 3 (b)
Product is the average value of loop area in Fig. 3 (a), almost the same with coiling loop area itself, thus compensation effect is more preferable so that
Sensor resistance to vertical direction interference performance is stronger.2 data of table can be seen that the loop line designed using Fig. 3 (b), and vertical direction is dry
It disturbs error and is less than 0.01%.
The detection sensor 1, skeleton is made using epoxide resin material, and for skeleton sheet as circle, skeleton is thick
Degree is generally made of the pcb board after 3mm.Its internal-and external diameter can suitably be adjusted according to installation environment, so as to be applied to difference
Occasion.
The detection sensor 1 is mounted in endless metal shielding box 9, as shown in figure 4, anti-dry so as to effectively improve it
Disturb ability.
The detection sensor 1 includes two pads 10 on pcb board 5, for welding shielded cable, such as Fig. 3 (b)
It is shown.Signal output sends 2 yuan of oscillometric signal unit to through shielded cable.Oscillometric signal unit 2 uses MDO4000C hybrid domains
Oscillograph is constituted, and measures frequency band up to 1GHz, record points ensure that up to 20M, maximum sample rate up to 5 GS/s of maximum
The accurate acquisition of shelf depreciation high-frequency signal and waveform are shown.
The oscillometric signal unit 2, output send the signal processing terminal 3 to through USB shielding lines 4.The signal processing terminal
The 3 local discharge signal data for transmit to oscillometric signal unit 2 carry out analyzing processing, data preserve, status assessment and in advance
It is alert etc., when finding that local discharge signal is larger, then early warning is carried out, prompts staff's concern to be detected measurement equipment, carry out in time
Maintenance prepares.
The signal processing terminal 3 uses PC machine or laptop, installs Labview software programmings, cooperation thereon
Matlab programs carry out data processing, can effectively improve data analysis accuracy.
A kind of local discharge signal detecting system of the utility model, detection sensor 1 use two kinds and are different from tradition
The design method of sensor：
1) when connecting up, pcb board front wiring is Chong Die with back wiring, so its wire turn plane is in same with lead location
In plane, be conducive to enhance its anti-interference ability.Test result shows the design method by electromagnetic interference smaller, and error is only
0.023%；
2) loop line design method than traditional loop line design method closer to coiling loop area itself, thus compensation effect
More preferably, the electromagnetic interference capability in resistance to vertical direction is stronger.
1 pcb board various wirings mode the simulation results of table
| Winding mode | Neighbouring conducting wire mushing error (%) |
| Fig. 2 (a), (b) | 0.182 |
| Fig. 2 (c), (d) | 0.096 |
| Fig. 2 (e), (f) | 0.023 |
The different loop line mode the simulation results of table 2
Claims (7)
1. a kind of local discharge signal detecting system, including detection sensor（1）, oscillometric signal unit（2）, the signal processing terminal
（3）, it is characterised in that：The detection sensor（1）Including pcb board（5）, front wiring（6）, back wiring（7）, pass through PCB
Plate（5）On front wiring（6）, back wiring（7）, formed and measure wire turn, the front wiring（6）, back wiring（7）Using
Via is connected；The detection sensor（1）Connection signal oscillography unit（2）, the oscillometric signal unit（2）Connection signal processing
Terminal（3）.
2. a kind of local discharge signal detecting system according to claim 1, it is characterised in that：The front wiring（6）With
Back wiring（7）Overlapping connects up almost all overlapping, the extended line of wire turn plane and a conducting wire between the same wire turn is positive and negative
The centers L0 are on same straight line connecting line.
3. a kind of local discharge signal detecting system according to claim 1, it is characterised in that：The detection sensor（1）
Including the first loop line（8）, the second loop line（8'）, the first loop line（8）Radius be pcb board coil inner ring radius, the second loop line
（8'）Radius be pcb board coil outer ring radius.
4. a kind of local discharge signal detecting system according to claim 1, it is characterised in that：The detection sensor（1）
Including third circuit（8''）, third circuit（8''）Including two halves loop line, the radius of half loop line is the half of pcb board coil inner ring
Diameter, the radius of the other half loop line are the radius of pcb board coil outer ring, the loop area constituted to entire loop line and coiling itself
Loop area is almost the same.
5. a kind of local discharge signal detecting system according to claim 1, it is characterised in that：The pcb board（5）Using ring
Oxygen resin material makes, pcb board（5）Constitute detection sensor（1）Skeleton, detection sensor（1）Mounted on annular gold
Belong to shielding box（9）It is interior.
6. a kind of local discharge signal detecting system according to claim 1, it is characterised in that：The pcb board（5）On include
Two pads（10）, for welding shielded cable；Detection sensor（1）Signal output sends oscillometric signal to through shielded cable
Unit（2）, oscillometric signal unit（2）Using MDO4000C hybrid domain oscillographs.
7. a kind of local discharge signal detecting system according to claim 1, it is characterised in that：The oscillometric signal unit
（2）Output is through USB shielding lines（4）Send the signal processing terminal to（3）, the signal processing terminal（3）For to oscillometric signal unit
（2）The local discharge signal data of transmission carry out analyzing processing, data preservation, status assessment and early warning.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820282032.9U CN208044005U (en) | 2018-02-28 | 2018-02-28 | A kind of local discharge signal detecting system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820282032.9U CN208044005U (en) | 2018-02-28 | 2018-02-28 | A kind of local discharge signal detecting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108120910A (en) * | 2018-02-28 | 2018-06-05 | 三峡大学 | A kind of local discharge signal detecting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108120910A (en) * | 2018-02-28 | 2018-06-05 | 三峡大学 | A kind of local discharge signal detecting system |
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