CN109307829A - With the detection device and its detection method of transient earth voltage shelf depreciation on site - Google Patents
With the detection device and its detection method of transient earth voltage shelf depreciation on site Download PDFInfo
- Publication number
- CN109307829A CN109307829A CN201811478658.8A CN201811478658A CN109307829A CN 109307829 A CN109307829 A CN 109307829A CN 201811478658 A CN201811478658 A CN 201811478658A CN 109307829 A CN109307829 A CN 109307829A
- Authority
- CN
- China
- Prior art keywords
- pulse
- shelf depreciation
- voltage
- electromagnetic
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
Disclose a kind of detection device and its detection method with transient earth voltage shelf depreciation on site, emitter includes shell, DC power supply, triggering and electric current pulse width control unit, field-effect transistor driving unit, high-voltage pulse generator, electromagnetic probe, electromagnetic wave transmission unit and detection unit, the triggering and electric current pulse width control unit include the pulse width control unit for issuing the trigger unit of trigger signal and issuing electric current pulse width signal based on trigger signal, the field-effect transistor driving unit is based on trigger signal and electric current pulse width signal generates pulse signal and make-and-break time；The high-voltage pulse generator generates the transient electromagnetic pulse of predetermined pulse width and preset frequency based on the pulse signal and make-and-break time, electromagnetic wave transmission unit sends electromagnetic wave based on the transient electromagnetic pulse from the electromagnetic probe, and detection unit is based on the Electromagnetic Wave Detection and positioning shelf depreciation.
Description
Technical field
The present invention relates to shelf depreciation technical field, especially a kind of detection with transient earth voltage shelf depreciation on site
Device and its detection method.
Background technique
It is in high-voltage isulation that shelf depreciation occurs under the action of strong electrical field for certain weak parts in Electric Power Equipment Insulation
Common problem.Although shelf depreciation will not generally cause the penetrability breakdown of insulation, dielectric can be caused (especially
Organic dielectric) local damage.If shelf depreciation long-term existence, it will lead to insulation degradation under certain condition or even hit
It wears.Therefore, carrying out shelf depreciation test to power equipment is power equipment manufacture and a running important preventive trial.
Switchgear is widely used in power grid, and shelf depreciation is one of main forms of its insulation defect, partial discharge inspection
Surveying is also the effective means for assessing apparatus insulated situation in switchgear.Partial Discharge Detection equipment based on TEV principle, which has, to be passed
It is smaller to broadcast process decaying, can be realized good detection sensitivity；It can be according to the decaying and the time difference of electromagnetic pulse signal to switch
The Partial Discharge Sources of cabinet are positioned；The advantages that partial discharge of switchgear type can be analyzed, is examined in the shelf depreciation of switchgear
It is had been widely used in survey.
However, finding in practice, most of detection devices based on TEV lack sensor field-checking function,
It not can guarantee the accuracy of detection, there is not high sensitivity, poor repeatability, be unable to the problems such as reliable location, therefore develop one
The emitter of the portable partial discharge of switchgear of kind improves the reliable of switchgear safe operation for guaranteeing detection effect
Property., for improving switchgear scene inspection quality, there is significant practical significance in the period for shortening equipment breakdown discovery defect elimination for this.
At present switchgear electric wave partial discharge detector's device model it is more, sensitivity is also different.Such equipment
Through frequently with typical defect simulation shelf depreciation and matching standard pulse current method in the relatively simple laboratory of electromagnetic environment
It is demarcated, but this method, by the power of local discharge signal and being affected for stability, shelf depreciation swashs
Electricity magnetostatic wave signal is also because there are inconsistencies for the structure snd size of defect.
Disclosed above- mentioned information are used only for enhancing the understanding to background of the present invention in the background section, it is thus possible to
Information comprising not constituting the prior art known to a person of ordinary skill in the art in home.
Summary of the invention
In view of the above problems, the present invention implements to provide a kind of detection device with transient earth voltage shelf depreciation on site
And its detection method, the electromagnetic signal for all generating identical energy can be triggered every time, can output pulse width be ns grades of electromagnetism
For pulse signal for the reception of ground radio wave sensor, complying fully with shelf depreciation in practice is duration very short transient process,
The consistency or repeatability of output signal and it is capable of providing quantization calibration result, and can be accurately positioned shelf depreciation position
It sets, portable, repeated strong, the available transient earth voltage shelf depreciation on site of the present invention.
The purpose of the present invention is be achieved by the following technical programs.
An aspect of of the present present invention, it is a kind of to include with the detection device of transient earth voltage shelf depreciation on site,
Shell which is provided with first switch, second switch and third switch；
DC power supply is contained in the shell, can connect to on-off the first switch；
Triggering and electric current pulse width control unit, are contained in the shell and are electrically connected the DC power supply, the touching
It sends out and electric current pulse width control unit includes,
Trigger unit can connect to on-off the second switch, and issue trigger signal via second switch, and
Pulse width control unit issues electric current pulse width signal based on trigger signal；
Field-effect transistor driving unit is contained in the shell and is electrically connected DC power supply and triggering and electric current pulsewidth
Control unit, when the field-effect transistor driving unit is based on trigger signal and electric current pulse width signal generation pulse signal and on-off
Between；
High-voltage pulse generator, is contained in the shell and is electrically connected DC power supply and field-effect transistor driving is single
Member, high-voltage pulse generator can connect to on-off the third switch, and the high-voltage pulse generator is based on the pulse signal
The transient electromagnetic pulse of predetermined pulse width and preset frequency is generated with make-and-break time；
Electromagnetic probe is arranged in the electromagnetic probe connection high-voltage pulse generator and electromagnetic wave transmission unit of hull outside；
Electromagnetic wave transmission unit, is arranged in hull outside and the connection electromagnetic probe, electromagnetic wave transmission unit are based on
Transient electromagnetic pulse from the electromagnetic probe sends electromagnetic wave；
Detection unit, based on the Electromagnetic Wave Detection and positioning shelf depreciation.
For the use on site in the detection device of transient earth voltage shelf depreciation, the DC power supply includes chargeable lithium
Battery, third switch are shifting switch.
For the use on site in the detection device of transient earth voltage shelf depreciation, field-effect transistor driving unit includes gold
Belong to oxide semiconductor field effect transistor, Metal Oxide Semiconductor Field Effect Transistor includes that N-type metal oxide is partly led
Body field effect transistor or P type metal oxide semiconductor field effect transistor.
On site in the detection device of transient earth voltage shelf depreciation, shell is equipped with for showing the aobvious of data the use
Display screen and input unit for input data.
For the use on site in the detection device of transient earth voltage shelf depreciation, the trigger unit includes that triggering is compared
End, the trigger unit electric connection DC power supply, triggering compare end and keep low level, when trigger unit receives trigger signal, touching
Hair compares end to be triggered by low transition at high level and by failing edge edge.
On site in the detection device of transient earth voltage shelf depreciation, field-effect transistor driving unit is based on the use
MOSFET traction and control charging capacitor generate transient electromagnetic pulse.
For the use on site in the detection device of transient earth voltage shelf depreciation, the high-voltage pulse generator is high pressure
Pulse packet.
The described use is on site in the detection device of transient earth voltage shelf depreciation, the no-load voltage ratio of the high-voltage pulse packet
2000:1, input voltage peak value are 22V, and high voltage package pair side output voltage peak value is up to 60kV.
The described use is on site in the detection device of transient earth voltage shelf depreciation, what the electromagnetic wave transmission unit was sent
The rising edge of a pulse of electromagnetic wave signal integral is ns grades.
According to a further aspect of the invention, a kind of inspection with the detection device of transient earth voltage shelf depreciation on site
Survey method includes the following steps,
In the first step, first switch is activated, DC power supply is connected, actuating third switch adjusts high-voltage pulse
The gear of device；
In the second step, second switch is activated, trigger unit issues trigger signal, and pulse width control unit is based on triggering letter
Number issue electric current pulse width signal；
In third step, field-effect transistor driving unit is based on trigger signal and electric current pulse width signal generates pulse signal
And make-and-break time；
In four steps, the high-voltage pulse generator is based on the pulse signal and make-and-break time generates predetermined pulse width
With the transient electromagnetic pulse of preset frequency；
In the 5th step, electromagnetic wave transmission unit sends electromagnetism based on the transient electromagnetic pulse from the electromagnetic probe
Wave；
In the 6th step, based on the Electromagnetic Wave Detection and positioning shelf depreciation.
The above description is only an overview of the technical scheme of the present invention, in order to make technological means of the invention clearer
Understand, reach the degree that those skilled in the art can be implemented in accordance with the contents of the specification, and in order to allow the present invention
Above and other objects, features and advantages can be more clearly understood, illustrated below with a specific embodiment of the invention
Explanation.
Detailed description of the invention
By reading the detailed description in hereafter preferred embodiment, various other advantages and benefits of the present invention
It will become apparent to those of ordinary skill in the art.Figure of description only for the purpose of illustrating preferred embodiments,
And it is not to be construed as limiting the invention.It should be evident that drawings discussed below is only some embodiments of the present invention,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Other attached drawings.And throughout the drawings, identical component is presented with like reference characters.
In the accompanying drawings:
Fig. 1 is the structure according to an embodiment of the invention with the detection device of transient earth voltage shelf depreciation on site
Schematic diagram；
Fig. 2 is the triggering according to an embodiment of the invention with the detection device of transient earth voltage shelf depreciation on site
And the schematic circuit of electric current pulse width control unit；
Fig. 3 is the field effect according to an embodiment of the invention with the detection device of transient earth voltage shelf depreciation on site
The schematic circuit of transistor driving unit；
Fig. 4 is the field effect according to an embodiment of the invention with the detection device of transient earth voltage shelf depreciation on site
The schematic circuit of transistor driving unit；
Fig. 5 is the high pressure according to an embodiment of the invention with the detection device of transient earth voltage shelf depreciation on site
The generation schematic diagram of impulse generator；
Fig. 6 is the output according to an embodiment of the invention with the detection device of transient earth voltage shelf depreciation on site
Voltage pulse signal waveform diagram；
Fig. 7 is according to an embodiment of the invention consistent with the detection device of transient earth voltage shelf depreciation on site
Property detection waveform figure；
Fig. 8 (a) to Fig. 8 (c) is the inspection according to an embodiment of the invention with transient earth voltage shelf depreciation on site
Survey the TEV pulse signal figure for only changing strength of discharge and measuring of device；
Fig. 9 is the air gap according to an embodiment of the invention with the detection device of transient earth voltage shelf depreciation on site
The relationship amplitude figure of spacing and TEV amplitude；
Figure 10 is the inspection according to an embodiment of the invention with the detection device of transient earth voltage shelf depreciation on site
The step schematic diagram of survey method.
Below in conjunction with drawings and examples, the present invention will be further explained.
Specific embodiment
1 to Figure 10 specific embodiment that the present invention will be described in more detail below with reference to accompanying drawings.Although being shown in attached drawing
Specific embodiments of the present invention, it being understood, however, that may be realized in various forms the reality of the invention without that should be illustrated here
Example is applied to be limited.On the contrary, providing these embodiments is to be able to thoroughly understand the present invention, and can will be of the invention
Range is fully disclosed to those skilled in the art.
It should be noted that having used some vocabulary in the specification and claims to censure specific components.Ability
Field technique personnel it would be appreciated that, technical staff may call the same component with different nouns.This specification and right
It is required that not in such a way that the difference of noun is as component is distinguished, but with the difference of component functionally as differentiation
Criterion."comprising" or " comprising " as mentioned throughout the specification and claims are an open language, therefore should be solved
It is interpreted into " including but not limited to ".Specification subsequent descriptions are to implement better embodiment of the invention, so the description be with
For the purpose of the rule of specification, the range that is not intended to limit the invention.Protection scope of the present invention is when the appended right of view
It is required that subject to institute's defender.
In order to facilitate understanding of embodiments of the present invention, it is done by taking several specific embodiments as an example below in conjunction with attached drawing further
Explanation, and each attached drawing does not constitute the restriction to the embodiment of the present invention.
The embodiment of the present invention will be specifically described in conjunction with Fig. 1-8.Fig. 1 is one embodiment of the present of invention on site
The structural schematic diagram of the detection device of transient earth voltage shelf depreciation, as shown in Figure 1, a kind of part of transient earth voltage on site
The detection device of electric discharge includes,
Shell 10 which is provided with first switch 11, second switch 12 and third switch 13；
DC power supply 1 is contained in the shell 10, can connect to on-off the first switch 11；
Triggering and electric current pulse width control unit 2 are electrically connected the DC power supply 1, the triggering and electric current pulse-width controlled
Unit 2 includes,
Trigger unit 3 can connect to on-off the second switch 12, and issue trigger signal via second switch 12,
And
Pulse width control unit 4 issues electric current pulse width signal based on trigger signal；
Field-effect transistor driving unit 5 is electrically connected DC power supply 1 and triggering and electric current pulse width control unit 2, the field
It imitates transistor driving unit 5 and is based on trigger signal and electric current pulse width signal generation pulse signal and make-and-break time；
High-voltage pulse generator 6 is contained in the shell 10 and is electrically connected DC power supply 1 and field-effect transistor driving
Unit 5, high-voltage pulse generator 6 can connect to on-off the third switch 13, and the high-voltage pulse generator 6 is based on the arteries and veins
It rushes signal and make-and-break time generates the transient electromagnetic pulse of predetermined pulse width and preset frequency；
Electromagnetic probe 7 connects high-voltage pulse generator 6 and electromagnetic wave transmission unit 8；
Electromagnetic wave transmission unit 8 sends electromagnetic wave, detection based on the transient electromagnetic pulse from the electromagnetic probe 7
Unit 9, based on the Electromagnetic Wave Detection and positioning shelf depreciation.
For a further understanding of the present invention, in one embodiment, with the detection of transient earth voltage shelf depreciation on site
Device includes that triggering and electric current pulse width control unit 2, MOSFET driving circuit control unit, high-voltage pulse generator 6, electromagnetism are visited
First 7 and 8 multiple portions of electromagnetic wave transmission unit composition.Triggering and electric current pulse width control unit 2 provide for MOSFET driving circuit
Pulse signal controls the turn-on and turn-off of MOSFET, and then generates pulsewidth on electromagnetic probe 7, the transient state that frequency is setting value
Electromagnetic pulse, and be more radiated the electromagnetic wave of generation in space by electromagnetic wave transmission unit 8.Due to using MOSFET
Mode controls current impulse, and rear end the method for voltage signal can be used the high-voltage pulse packet of miniaturization, thus instead of volume compared with
Big pulse transformer, entire calibration equipment realize miniaturization and portability.
In one embodiment, DC power supply 1 uses the lithium battery that can be used with cycle charging, and energy conservation and environmental protection solves simultaneously
It has determined the power issue of field construction operation, has avoided separately connecing power supply at the scene, the selection and cooperation of electronic device use energy-saving square
Formula, so that theoretical stand-by time is up to 16 hours.
In one embodiment, altogether there are three control switch on case panel, wherein uppermost such as the of ship type switch
One switch is DC power supply switch；If the second switch 12 of button is artificial triggering key, it to be used for artificial trigger pulse；It is bottom
As toggle switch third switch 13 be shifting switch, thus it is possible to vary the series-parallel access way sum number of storage capacitor in circuit
Mesh conveniently realizes the purpose of adjustment output electromagnetic impulse power, the partial discharge arteries and veins of basic, normal, high three kinds of gears may be selected
Intensity.
In one embodiment, by adjusting third switch 13, change the series-parallel access way of storage capacitor in circuit
And number, it can conveniently realize the purpose of adjustment output electromagnetic impulse power, while additional electromagnetic wave sending module, it can
The electromagnetic wave of generation to be more radiated in space.
In one embodiment, electromagnetic pulse conditioning unit includes triggering and electric current pulse width control unit 2, MOSFET driving
Circuit control unit, 6 multiple portions of high-voltage pulse generator, energy production are drawn and are controlled the side of charging capacitor using MOSFET
Formula reduces the weight and size of equipment in design, is convenient for carrying.Current impulse, rear end pair are controlled using MOSFET mode
The high-voltage pulse packet of miniaturization can be used in the method for voltage signal, to realize entire instead of the biggish pulse transformer of volume
The miniaturization and portability of calibration equipment.
In one embodiment, according to requiring, the input of single pulse signal uses artificial key triggering mode, triggers mode
For standby mode, therefore after the opening of DC power supply 1, working cell is constantly in state to be triggered, triggering compare end+Tr1 and-
Tr1 maintains low level, after trigger unit 3Q2 receives trigger signal, compares end-Tr1 and is in high level, and by failing edge along touching
Hair, CMOS enter working condition, and pulse width control unit 4 starts simultaneously at starting.Switch triggering and electric current pulse width control unit 2 are as schemed
Shown in 2.
The described use is on site in the detection device preferred embodiment of transient earth voltage shelf depreciation, the DC power supply 1
Including rechargeable lithium battery.
The described use is on site in the detection device preferred embodiment of transient earth voltage shelf depreciation, the trigger unit 3
Compare end, the 3 electric connection DC power supply 1 of trigger unit including triggering, triggering compares end and keeps low level, when trigger unit 3
Trigger signal is received, triggering is compared end and triggered by low transition at high level and by failing edge edge.
In one embodiment, field-effect transistor driving unit 5 shown in Fig. 3 is controlled by upper level switch triggering unit 3
System, and provide stable incoming level for rear stage MOSFET and control the make-and-break time of MOSFET.
On site in the detection device preferred embodiment of transient earth voltage shelf depreciation, field-effect transistor drives the use
Unit 5 includes Metal Oxide Semiconductor Field Effect Transistor.
The use on site in the detection device preferred embodiment of transient earth voltage shelf depreciation, partly lead by metal oxide
Body field effect transistor is that N-type Metal Oxide Semiconductor Field Effect Transistor or P type metal oxide semiconductor field-effect are brilliant
Body pipe.
On site in the detection device preferred embodiment of transient earth voltage shelf depreciation, field-effect transistor drives the use
Unit 5 is based on MOSFET and draws and control charging capacitor generation transient electromagnetic pulse
In one embodiment, MOSFET output unit output level shown in Fig. 4 is determined by capacitor C6 and resistance R4, defeated
Energy is determined by the charging efficiency that MOSFET make-and-break time and 4-6V DC power supply 1 are capacitor C6 out.It is connect in the switch of DC power supply 1
Under logical state, 4-6V DC power supply 1 is always capacitor C6 charging, which is the waiting turnaround time of tester, about
In 2~5s or so, to guarantee that the steeper rising edge of MOSFET output voltage, the resistance of output loop are set as zero.
The use on site in the detection device preferred embodiment of transient earth voltage shelf depreciation, send out by the high-voltage pulse
Raw device 6 is high-voltage pulse packet.
The described use is on site in the detection device preferred embodiment of transient earth voltage shelf depreciation, the high-voltage pulse packet
No-load voltage ratio 2000:1, input voltage peak value is 22V, and high voltage package pair side output voltage peak value is up to 60kV.
In one embodiment, the no-load voltage ratio 2000:1 of high-voltage pulse packet shown in fig. 5, input voltage peak value are 22V, high pressure
It wraps secondary side output voltage peak value and reaches as high as 60kV, the setting of sharp plate spark gap distance can be according to verified sensor device
Response sensitivity determines, according to the sensitivity for the ground electric wave test equipment that investigation is widely used at present, fixes the checker
Spark gap is 4mm.
On site in the detection device preferred embodiment of transient earth voltage shelf depreciation, the electromagnetic wave is sent the use
The rising edge of a pulse for the electromagnetic wave signal integral that unit 8 is sent is ns grades.
In one embodiment, the voltage pulse signal such as Fig. 6 institute exported under high-voltage pulse packet no-load condition by MOSFET
Show, which is about 2ns, pulsewidth 22ns.After pulse packet, which is incorporated to, seals in spark gap, flowed through in electric discharge moment
Also as shown, as seen from the figure, which is about 2.5ns, half peak value is about the pulsed current signal in circuit
20ns complies fully with practical pulse current of PD wave character.
Since ground electric wave detection sensor is the response to electromagnetic wave integral energy signal, the electromagnetism of checker output
Wave integrated signal energy demand has consistency, i.e., triggers the electromagnetic signal for all generating identical energy every time.As shown in fig. 7, being
Verifier is certain in strength of discharge, and spark gap is certain, one timing of hookup, when exporting certain frequency discharge pulse, through TEV
The collected TEV pulse train waveform of sensor, as seen from the figure, each discharge pulse amplitude size is certain, illustrates that the present invention has
Preferable consistency, and by repeatedly testing, the repetitive rate of pulse amplitude and energy is almost 100%.
In general, the impedance of single 10kV cable is about 10 Ω, and the impedance of the metal shell bus-bar room of 35kV is then about
When generation continues the weak electric pulse electric current of 100mA of 10 μ s or so when shelf depreciation occurs for 70 Ω, cable or bus-bar room, in metal
It will appear the voltage-to-ground of 1~7V on shell.Voltage, current impulse are propagated along the inner surface of switchgear metal shell, chance opening,
The gap of connector, cover board etc. spreads out of equipment, propagates to the earth further along the outer surface of metal shell.
In one embodiment, corresponding strength of discharge can be selected according to demand, other each test parameters are consistent, test
In the case where consistent, only change the strength of discharge of checker, TEV pulse signal such as Fig. 8 (a) that TEV sensor measures is extremely
Shown in Fig. 8 (c), as seen from the figure, under different stalls, the strength of discharge of detection device is different, and the amplitude of waveform substantially at
The trend linearly increased, meets design requirement.
In one embodiment, as shown in figure 9, testing conditions are consistent, strength of discharge is consistent, the consistent situation such as detection environment
Under, the relationship of spark gap distance and the collected maximum amplitude of detection device energy.The setting of spark gap distance can be according to quilt
The response sensitivity of check sensor equipment determines, when the clearance distance is set as 4mm, demarcates by pulse current method,
It is electromagnetic wave caused by 20pC shelf depreciation that the pulse electromagnetic wave emitted at this time, which is equivalent to discharge capacity,.The detection device is produced
Raw pulse electromagnetic wave energy is related to spark gap distance, and adjustable extent is 5pC to 75pC, therefore can be according to specifically electric
The sensitivity of wave detection device sensor is adjusted.In one embodiment, the primary clearance distance of detection device is fixed as
4mm。
According to another aspect of the present invention, as shown in Figure 10, a kind of use transient earth voltage shelf depreciation on site
Detection device detection method includes the following steps,
In first step S1, first switch 11 is activated, connects DC power supply 1, activates third switch 13, adjusts high-tension pulse
Rush the gear of generator 6；
In second step S2, trigger unit 3 issues trigger signal, and pulse width control unit 4 is based on trigger signal and issues electricity
Flow pulse width signal；
In third step S3, field-effect transistor driving unit 5 is based on trigger signal and electric current pulse width signal generates pulse
Signal and make-and-break time；
In the fourth step s 4, the high-voltage pulse generator 6 is based on the pulse signal and make-and-break time generates and makes a reservation for
The transient electromagnetic pulse of pulsewidth and preset frequency；
In the 5th step S5, electromagnetic wave transmission unit 8 is sent based on the transient electromagnetic pulse from the electromagnetic probe 7
Electromagnetic wave；
In the 6th step S6, based on the Electromagnetic Wave Detection and positioning shelf depreciation.
The present invention motivates high-frequency electromagnetic pulse electromagnetic wave to emit using air electric spark clearance, and the wave ultimately generated is close
The high frequency partial discharge pulse that electric discharge releases in actual switch cabinet, controls current impulse using MOSFET mode, rear end uses
The high-voltage pulse packet of miniaturization adjusts voltage, so that the biggish pulse transformer of substituted volume, realizes entire calibration equipment
Miniaturization and facilitation, using MOSFET draw and control charging capacitor by the way of, reduce in design equipment weight and
Size is convenient for carrying, and is applicable in TEV Partial discharge detector on site and is verified, device uses lithium battery power supply, and use is detachable
Installation, conveniently removes charging, and the selection and cooperation of electronic device use power save mode, so that theoretical stand-by time is small up to 16
When, by changing the series-parallel access way and number of storage capacitor, realize the purpose of adjustment output electromagnetic impulse power.It adjusts
Shelves capacitor select high voltagehigh frequency ceramic disc capacitor, have small positive capacitance temperature factor, by capacitor it is parallel charging and serially
Electric discharge can obtain more times of charging voltage at circuit load both ends, reach generation and be enough that air electric spark clearance is made to generate electric discharge
High pressure；Shifting switch selects third gear toggle switch, and whole device has stronger mechanical performance and longer service life.This hair
It is bright to stablize effectively output verification pulse electromagnetic wave signal, cooperate the quantitatively calibrating of pulse current method can be to any knot
Structure and the shelf depreciation electromagnetic signal under are verified, improve detection device used under complex electromagnetic environment it is accurate
Property and validity.
Although embodiment of the present invention is described in conjunction with attached drawing above, the invention is not limited to above-mentioned
Specific embodiments and applications field, above-mentioned specific embodiment are only schematical, directiveness, rather than restricted
's.Those skilled in the art are under the enlightenment of this specification and in the range for not departing from the claims in the present invention and being protected
In the case where, a variety of forms can also be made, these belong to the column of protection of the invention.
Claims (10)
1. a kind of detection device with transient earth voltage shelf depreciation on site comprising,
Shell which is provided with first switch, second switch and third switch；
DC power supply is contained in the shell, can connect to on-off the first switch；
Triggering and electric current pulse width control unit, are contained in the shell and be electrically connecteds the DC power supply, it is described trigger and
Electric current pulse width control unit includes,
Trigger unit can connect to on-off the second switch, and issue trigger signal via second switch, and
Pulse width control unit issues electric current pulse width signal based on trigger signal；
Field-effect transistor driving unit is contained in the shell and is electrically connected DC power supply and triggering and electric current pulse-width controlled
Unit, the field-effect transistor driving unit is based on trigger signal and electric current pulse width signal generates pulse signal and make-and-break time；
High-voltage pulse generator is contained in the shell and is electrically connected DC power supply and field-effect transistor driving unit, high
Pressure impulse generator can connect to on-off the third switch, and the high-voltage pulse generator is based on the pulse signal and on-off
The transient electromagnetic pulse of time generation predetermined pulse width and preset frequency；
Electromagnetic probe is arranged in the electromagnetic probe connection high-voltage pulse generator and electromagnetic wave transmission unit of hull outside；
Electromagnetic wave transmission unit, is arranged in hull outside and the connection electromagnetic probe, and electromagnetic wave transmission unit is based on coming from
The transient electromagnetic pulse of the electromagnetic probe sends electromagnetic wave；
Detection unit, based on the Electromagnetic Wave Detection and positioning shelf depreciation.
2. the detection device according to claim 1 with transient earth voltage shelf depreciation on site, wherein preferred, institute
Stating DC power supply includes rechargeable lithium battery, and third switch is shifting switch.
3. the detection device according to claim 2 with transient earth voltage shelf depreciation on site, wherein field-effect transistor
Driving unit includes Metal Oxide Semiconductor Field Effect Transistor, and Metal Oxide Semiconductor Field Effect Transistor includes N-type
Metal Oxide Semiconductor Field Effect Transistor or P type metal oxide semiconductor field effect transistor.
4. the detection device according to claim 1 with transient earth voltage shelf depreciation on site, wherein shell, which is equipped with, to be used
In the display screen of display data and for the input unit of input data.
5. the detection device according to claim 1 with transient earth voltage shelf depreciation on site, wherein the triggering is single
Member includes that end, the trigger unit electric connection DC power supply are compared in triggering, and triggering compares end and keeps low level, when trigger unit connects
Trigger signal is received, triggering is compared end and triggered by low transition at high level and by failing edge edge.
6. the detection device according to claim 1 with transient earth voltage shelf depreciation on site, wherein field-effect transistor
Driving unit is based on MOSFET and draws and control charging capacitor generation transient electromagnetic pulse.
7. the detection device according to claim 1 with transient earth voltage shelf depreciation on site, wherein the high-tension pulse
Rushing generator is high-voltage pulse packet.
8. the detection device according to claim 7 with transient earth voltage shelf depreciation on site, wherein the high-tension pulse
The no-load voltage ratio 2000:1 of packet is rushed, input voltage peak value is 22V, and high voltage package pair side output voltage peak value is up to 60kV.
9. the detection device according to claim 6 with transient earth voltage shelf depreciation on site, wherein the electromagnetic wave
The rising edge of a pulse for the electromagnetic wave signal integral that transmission unit is sent is ns grades.
10. a kind of inspection of any of claims 1-9 with the detection device of transient earth voltage shelf depreciation on site
Survey method comprising following steps,
In first step (S1), first switch is activated, connects DC power supply, actuating third switch adjusts high-voltage pulse
The gear of device；
In second step (S2), second switch is activated, trigger unit issues trigger signal, and pulse width control unit is based on triggering letter
Number issue electric current pulse width signal；
In third step (S3), field-effect transistor driving unit is based on trigger signal and electric current pulse width signal generates pulse signal
And make-and-break time；
In four steps (S4), the high-voltage pulse generator is based on the pulse signal and make-and-break time generates predetermined pulse width
With the transient electromagnetic pulse of preset frequency；
In the 5th step (S5), electromagnetic wave transmission unit sends electromagnetism based on the transient electromagnetic pulse from the electromagnetic probe
Wave；
In the 6th step (S6), based on the Electromagnetic Wave Detection and positioning shelf depreciation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811415493 | 2018-11-23 | ||
| CN201811415493X | 2018-11-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109307829A true CN109307829A (en) | 2019-02-05 |
Family
ID=65222371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811478658.8A Pending CN109307829A (en) | 2018-11-23 | 2018-12-05 | With the detection device and its detection method of transient earth voltage shelf depreciation on site |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109307829A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204028342U (en) * | 2014-08-02 | 2014-12-17 | 贵州电力试验研究院 | A kind of calibration equipment of the Partial discharge detector based on electromagnetic signal |
| CN107643481A (en) * | 2017-10-31 | 2018-01-30 | 天津大学 | A kind of inexpensive electromagnetism fault injection experiment platform and experimental method |
| CN107818218A (en) * | 2017-10-31 | 2018-03-20 | 天津大学 | A kind of nanosecond electromagnetic pulse generator for electromagnetism direct fault location |
-
2018
- 2018-12-05 CN CN201811478658.8A patent/CN109307829A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204028342U (en) * | 2014-08-02 | 2014-12-17 | 贵州电力试验研究院 | A kind of calibration equipment of the Partial discharge detector based on electromagnetic signal |
| CN107643481A (en) * | 2017-10-31 | 2018-01-30 | 天津大学 | A kind of inexpensive electromagnetism fault injection experiment platform and experimental method |
| CN107818218A (en) * | 2017-10-31 | 2018-03-20 | 天津大学 | A kind of nanosecond electromagnetic pulse generator for electromagnetism direct fault location |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103176160A (en) | Local discharge simulation calibrating device | |
| CN108254662A (en) | Shelf depreciation simulator | |
| CN207490885U (en) | A kind of tesla's voltage boosting pulse source | |
| Pecastaing et al. | Very fast rise-time short-pulse high-voltage generator | |
| CN208109986U (en) | Shelf depreciation simulator | |
| CN209028143U (en) | Electric vehicle alternating current charging test system | |
| CN204028342U (en) | A kind of calibration equipment of the Partial discharge detector based on electromagnetic signal | |
| CN109307829A (en) | With the detection device and its detection method of transient earth voltage shelf depreciation on site | |
| CN110045199B (en) | EFT/ESD/CS electromagnetic interference analyzer | |
| CN109669107A (en) | Simulate the device and its analogy method of shelf depreciation | |
| CN208013332U (en) | A kind of power device dv/dt test circuits and test board | |
| CN109660030A (en) | With the emitter and its launching technique of transient earth voltage shelf depreciation on site | |
| CN107728034B (en) | New Type Power Devices auto-control electrostatic protection test macro and method | |
| CN210155225U (en) | EFT/ESD/CS electromagnetic interference analyzer | |
| CN103746673A (en) | Pulse signal generator | |
| CN107390061A (en) | Using the test system of fiber optic communication electronic device false triggering under strong electromagnetic radiation | |
| CN109596953A (en) | Electromagnetic wave launcher and instrument for measuring partial discharge's device | |
| CN208849692U (en) | A kind of compact high-voltage switch gear component | |
| Demakov et al. | Research of radiated emissions of a microcontroller using various power supplies | |
| CN219533252U (en) | Epoxy medium partial discharge signal generator | |
| CN104849529A (en) | Indirect measurement method for extremely-high-amplitude voltage during extremely fast risetime | |
| CN203645637U (en) | Pulse signal generator | |
| CN111294021B (en) | Airplane airborne fast pulse group test generator | |
| CN219302572U (en) | Multipath synchronous output pulse current injection source | |
| CN103105565A (en) | Series resonance voltage-withstanding partial-discharge test method utilizing frequency modulation phase shift |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190205 |