CN207232234U - A kind of special fast transient overvoltage measuring system - Google Patents
A kind of special fast transient overvoltage measuring system Download PDFInfo
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- CN207232234U CN207232234U CN201721340865.8U CN201721340865U CN207232234U CN 207232234 U CN207232234 U CN 207232234U CN 201721340865 U CN201721340865 U CN 201721340865U CN 207232234 U CN207232234 U CN 207232234U
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Abstract
This application provides a kind of special fast transient overvoltage measuring system, including：Cone capacitance sensor, integrator, harvester and industrial personal computer；Wherein, cone capacitance sensor is provided with the first cone and the second cone；First cone is co-axially located inside the second cone, and dielectric film is filled between the first cone and the second cone；Second cone is provided with facies basialis pyramidis.In use, the facies basialis pyramidis of the second cone and the conductor in GIS pipelines, and the filling gas composition high voltage arm capacitor between facies basialis pyramidis and conductor；First cone forms low-voltage capacitance arm capacitance with the second cone and dielectric film, the low-voltage arm capacitance of cone structure is more than the low-voltage arm capacitance of flat capacitance sensor under identical induction area, cone capacitance sensor is had the intrinsic standoff ratio of bigger and broader frequency band；Low-voltage arm capacitance is in cone structure, avoids voltage wave and produces catadioptric in cone capacitance sensor and cause oscillating waveform and distortion, so as to fulfill the accurate measurement to VFTO.
Description
Technical field
This application involves power electronics field, more particularly to a kind of special fast transient overvoltage measuring system.
Background technology
Gas-insulated switchgear (Gas Insulated Switchgear, abbreviation GIS), since equipment is closed and is filled
Enter insulating gas, arc extinguishing ability is strong, and floor space is small, is widely used on super-pressure and extra-high voltage switch and bus equipment.
Disconnecting switch in GIS device, earthing switch and breaker can produce very fast transient overvoltage (Very when performing operation
Fast Transient Overvoltage, abbreviation VFTO), since the amplitude of VFTO is very high, frequency is very high, and steepness is very big, meeting
Constitute a serious threat to equipment safety operation, therefore, realize the accurate measurement to VFTO, can be that GIS device realizes safety fortune
Row provides reference frame.
But the VFTO rise time is extremely short, usually only several nanoseconds, also, VFTO is superimposed on power-frequency voltage, and by
Influence to equivalent frequency close to the residual charge voltage of direct current, in addition, GIS device when producing VFTO, adjoint can also be produced
Raw very high transient state voltage-to-ground (Transient Earth Voltage, abbreviation TEV), and done with very strong spatial electromagnetic
To disturb, therefore, in order to realize that VFTO measuring apparatus accurately measures VFTO, it is desirable to the VFTO measuring apparatus response times are very short,
Frequency band is very wide, and with the ability of anti-interference spatial electromagnetic interference.
In the prior art, the flat capacitance sensor that VFTO mainly uses plate electrode structures, still, the prior art are measured
Measurement VFTO in the low-voltage arm capacitance of flat capacitance sensor that uses it is small, partial pressure is smaller, can not realize larger width
Frequency response, causes RC time constants in measuring loop to diminish, and low frequency response is deteriorated, and frequency band narrows；In addition, plate electrode structures
Impedance be difficult matches impedances with measurement cable, catadioptric voltage can be produced, catadioptric voltage waveform is added to tested electricity
On corrugating, cause oscillating waveform and distortion.Therefore, the flat capacitance sensor used in measurement VFTO of the prior art without
Method realizes the accurate measurement to VFTO.
Utility model content
This application provides a kind of special fast transient overvoltage measuring system, to solve problems of the prior art.
According to an embodiment of the present application, there is provided a kind of special fast transient overvoltage measuring system, including：Cone capacitance sensing
Device, integrator, harvester and industrial personal computer；Wherein:
The cone capacitance sensor is provided with the first cone and the second cone；First cone is co-axially located at described
Inside second cone, dielectric film is filled between first cone and second cone；Second cone is provided with
Facies basialis pyramidis.
The integrator includes housing and the rc integrating circuit being arranged in the housing, is provided with the housing defeated
Enter end and output terminal；Be provided with cable connector at the top of second cone, second cone by the cable connector with
The input terminal of the integrator is coaxially connected；The output terminal of the integrator connects with one end of the harvester
Connect；The other end of the harvester is connected with the industrial personal computer.
Alternatively, electro-optic device and opto-electronic conversion dress are additionally provided between the harvester and the industrial personal computer
Put, the harvester is electrically connected with the electro-optic device, and the industrial personal computer is electrically connected with the photoelectric conversion device, institute
Electro-optic device is stated to connect by optical fiber long distance with photoelectric conversion device.
Alternatively, first cone includes the scope of bevel angle α, the bevel angle α between 15 degree of -45 degree.
Alternatively, the housing of the integrator is cylinder type hollow housing.
Alternatively, the harvester is analog acquisition card or oscillograph.
Alternatively, it is provided with shielding case outside the harvester.
Alternatively, the cable connector is elastomer connector made of metal.
Alternatively, the resistance scope of the rc integrating circuit is the Ω of 20 Ω~80, the rc integrating circuit
Capacitor's capacity scope is 50pF~2nF.
Alternatively, first cone and second cone are made using metallic aluminium.
Alternatively, the housing of the integrator is made using metal.
From above technical scheme, this application provides a kind of special fast transient overvoltage measuring system, including：Cone electricity
Hold sensor, integrator, harvester and industrial personal computer；Wherein, cone capacitance sensor is provided with the first cone and the second cone；
First cone is co-axially located inside the second cone, and dielectric film is filled between the first cone and the second cone；Second cone
It is provided with facies basialis pyramidis；Integrator includes housing and the rc integrating circuit being arranged in housing, and input terminal is provided with housing
And output terminal；Cable connector is provided with the top of second cone, the second cone is connected by the input terminal of cable connector and integrator
Connect；The output terminal of integrator and one end of harvester connect；The other end of harvester is connected with industrial personal computer.The application provides
The fast transient overvoltage measuring system of spy in use, being arranged in the reserved window of GIS pipelines, and be fixed on connecing for reserved window
On ground shell；The facies basialis pyramidis of second cone and the conductor in GIS pipelines, and the filling gas between facies basialis pyramidis and conductor
Form high voltage arm capacitor；First cone forms low-voltage capacitance arm capacitance with the second cone and dielectric film, in cone structure
Low-voltage arm capacitance is more than the low-voltage arm capacitance of flat capacitance sensor under identical induction area, makes the cone electricity in the application
Holding sensor has the intrinsic standoff ratio of bigger and broader frequency band；In addition, in the application, since low-voltage arm capacitance is in cone structure,
Cone capacitance sensor is formed size gradation in voltage direction of wave travel, be connected smoothly with integrator, realize cone
Bulk wave impedance is seamlessly transitted to integrator wave impedance, internal system voltage is matched, and avoids voltage wave in cone capacitance
Catadioptric is produced in sensor and causes oscillating waveform and distortion, so as to fulfill the accurate measurement to VFTO.
Brief description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is a kind of structure diagram of special fast transient overvoltage measuring system shown in the embodiment of the present application；
Fig. 2 is a kind of structure of special fast transient overvoltage measuring system cone capacitance sensor shown in the embodiment of the present application
Schematic diagram；
Fig. 3 is a kind of structure diagram of special fast transient overvoltage measuring system integrator shown in the embodiment of the present application；
Fig. 4 is the structure diagram of the special fast transient overvoltage measuring system of the another kind shown in the embodiment of the present application；
Fig. 5 is the lightning impulse voltage waveform diagram that a kind of special fast transient overvoltage measuring system of the application is measured；
Fig. 6 is the voltage waveform that the rising edge that a kind of special fast transient overvoltage measuring system of the application is measured is less than 10ns
Schematic diagram.
Wherein：1- cone capacitance sensors, the first cones of 11-, the second cones of 12-, 121- facies basialis pyramidises, 122- cables connect
Head, 13- dielectric films, 2- integrators, 21- housings, 211- input terminals, 212- output terminals, 22- rc integrating circuits, 3- collections
Device, 31- shielding cases, 4- industrial personal computers, 5- electro-optic devices, 6- photoelectric conversion devices, 7- grounding shells, 8-GIS pipelines, 9-
Conductor.
Embodiment
It is in order to make those skilled in the art better understand the technical solutions in the application, real below in conjunction with the application
The attached drawing in example is applied, the technical solution in the embodiment of the present application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.It is common based on the embodiment in the application, this area
Technical staff's all other embodiments obtained without making creative work, should all belong to the application protection
Scope.
Embodiment one
The embodiment of the present application provides a kind of special fast transient overvoltage measuring system, and Fig. 1 is shown in the embodiment of the present application
A kind of structure diagram of special fast transient overvoltage measuring system.A kind of as shown in Figure 1, special fast wink provided by the embodiments of the present application
State over-voltage measurement system includes：Cone capacitance sensor 1, integrator 2, harvester 3, industrial personal computer 4, wherein：
It is the special fast transient overvoltage measuring system cone capacitance sensor of one kind shown in the embodiment of the present application referring to Fig. 2
Structure diagram.As shown in Fig. 2, cone capacitance sensor 1 is provided with the first cone 11 and the second cone 12；First cone 11
It is co-axially located inside the second cone 12, dielectric film 13 is filled between the first cone 11 and the second cone 12；Second cone
12 bottoms are provided with facies basialis pyramidis 121.In the application, the first cone 11 and the second cone 12 are coaxially disposed, the first cone 11 with
Second cone 12 has the bevel angle α of formed objects, and the structure size of the second cone 12 is slightly less than 11 cone of the first cone
Structure size, makes to form equidistant gap between the first cone 11 and the second cone 12.
Dielectric film 13 is filled with gap between the application the first cone 11 and the second cone 12, dielectric film 13 is adopted
It is made of dielectric substance, layer insulation can be realized between the first cone 11 and the second cone 12, and buffering can be used as
Layer avoids producing collision between the first cone 11 and the second cone 12.The second cone 12 is formed with facies basialis pyramidis 121 in the application
Cone cavity, the interior filling insulating gas of cone cavity, to play the role of arc protection.In the present embodiment, dielectric film 13 can be adopted
With polyimides, polyethylene or polytetrafluoroethylene (PTFE), other general dielectric substances can also be used.Insulating gas can use
Pure air, nitrogen, sulfur hexafluoride gas or other can realize insulation arc protection gas.Therefore, for dielectric film 13
Specific material, and realize the concrete form that layer insulation is realized between the first cone 11 and the second cone 12, the present embodiment
It is not specifically limited.
In the application, cone capacitance sensor 1 is arranged in the reserved window of GIS pipelines 8, and is fixed on reserved window
On grounding shell 7, to realize the measurement to GIS device VFTO.
Referring to Fig. 3, the structure for a kind of special fast transient overvoltage measuring system integrator shown in the embodiment of the present application is shown
It is intended to.As shown in figure 3, integrator 2 includes housing 21 and the rc integrating circuit 22 being arranged in housing 21, set on housing 21
There are input terminal 211 and output terminal 212；The top of second cone 12 is provided with cable connector 122, and the second cone 12 is connect by cable
First 122 are connected with the input terminal 211 of integrator 2；The output terminal 212 of integrator 2 is connected with one end of harvester 3；Collection dress
3 other end is put to be connected with industrial personal computer 4.
In the application, the rc integrating circuit 22 in integrator 2 can carry out the low frequency response of cone capacitance sensor 1
Compensation, has the function that low-pass filtering, suppresses high frequency response, so as to improve the low frequency characteristic of cone capacitance sensor 1.The application
In rc integrating circuit 22 can also use other forms integrating circuit substitute, as long as can realize low-pass filtering, suppress
The effect of high frequency response, so that the equal integrating circuit of the low frequency characteristic for improving cone capacitance sensor 1 can be used as the application
Integrating circuit in middle integrator 2, therefore, for the concrete model of integrator 2 used herein, and in integrator 2
The concrete form of portion's integrating circuit, is not specifically limited in the present embodiment, those skilled in the art can according to use cost etc. because
Element voluntarily selects.
In a kind of selectable embodiment, the housing 21 of integrator 2 is cylinder type hollow housing, the material of housing 21
It can select metal material.Cylinder type hollow housing uses metal material can be as the electromagnetic shielding of rc integrating circuit 22
Layer, for shielding the electromagnetic interference in the external world, meanwhile, metal material can ensure that the current potential of 2 both sides of integrator is consistent.Integrator 2
The size of housing 21 should meet to make wave impedance and the cable formed between the rc integrating circuit 22 of integrator 2 and housing 21
The wave impedance of connector 122 is equal, and the wave impedance of integrator 2 can be calculated by coaxial configuration wave impedance calculation formula, this
Repeated no more in embodiment.
It is fragrant made of the metal material that cable connector 122 uses for coaxial cable in a kind of selectable embodiment
Any of several broadleaf plants connector, the input terminal of integrator 2 is coaxially connected by coaxial cable and banana connector, and coaxial cable has anti-interference well
Characteristic, can shield electromagnetic interference, improve systematic survey accuracy.In addition, the application, which can also use other, can ensure
Two cones 12 and the coaxially connected connector of integrator 2 or other can realize coaxially connected connection mode, for more multi-form
Coaxially connected mode, repeat no more in the present embodiment.
For the cone capacitance sensor 1 of the application when on GIS pipelines 8, facies basialis pyramidis 121 is used as capacitance sensor
Conductor 9 inside a part for high-voltage arm, with GIS pipelines 8, and filling gas forms height between facies basialis pyramidis 121 and conductor 9
Pressure arm capacitance；A part of second cone 12 as capacitance sensor low-voltage arm, with 13 structure of the first cone 11 and dielectric film
Into low-voltage arm capacitance.In the application, there is conical surface due to the second cone 12, and facies basialis pyramidis 121 is plane, because
This, compared with the area of facies basialis pyramidis 121, the area of the second cone 12 is greater than the area of facies basialis pyramidis 121, by the second cone
12nd, the first cone 11 and dielectric film 13 form low-voltage arm capacitance and are more than the low of flat capacitance sensor under identical induction area
Pressure arm capacitance, this causes the cone capacitance sensor 1 of the application to have the intrinsic standoff ratio of bigger and broader frequency band, in addition, this Shen
Please in, since low-voltage arm capacitance is in cone structure, cone capacitance sensor 1 is formed size gradually in voltage direction of wave travel
Become, be connected smoothly with integrator 2, realize cone wave impedance seamlessly transitting to integrator wave impedance, make internal system
Voltage matches, and avoids voltage wave and produces catadioptric in cone capacitance sensor 1 and cause oscillating waveform and distortion.
In the application, as a capacitance sensor high-voltage arm part facies basialis pyramidis 121 diameter and surveyed electricity
The frequency of pressure is related, and specifically, when the electromagnetic wave that VFTO is produced is along GIS 8 Propagations of pipeline, GIS pipeline sections are not
In the induced potential that synchronization produces it is unequal with position, therefore, measures accurate voltage waveform, it is desirable to electricity
Hold the axial dimension of the induction electrode of sensor, i.e., the diameter of the facies basialis pyramidis 121 in the application is much smaller than the ripple of measured waveform
It is long, impacted to avoid by induced potential is unequal with the excessive measurement to over-voltage waveform of induction electrode structure.Illustratively,
The diameter of facies basialis pyramidis 121 in the axial dimension of induction electrode, i.e. the application can be calculated according to the following formula：
Wherein, the electrode diameter of d-permission；
C0-the light velocity；
Fmax-tested waveform highest frequency；
The relative potentials that Δ V/V-electrode surface allows are poor.
Generally, choosing Δ V/V=0.01, if fmax=100MHz, d=191mm, i.e. facies basialis pyramidis can be calculated
121 diameter is maximum preferably to take 191mm.
In the application, the size of bevel angle α is related with the size of the reserved window of GIS pipelines 8, due to facies basialis pyramidis 121
Preferable maximum gauge is it was determined that the change of bevel angle α just determines the height and cone cavity of cone capacitance sensor 1
Size.But the value of bevel angle α can not be excessive or too small, when bevel angle α is excessive, cone capacitance sensor 1 can be caused
Intrinsic standoff ratio diminishes, and when bevel angle α is too small, can cause the excessive height of cone capacitance sensor 1 and can not be installed on GIS pipelines
In 8 reserved window, therefore, preferred bevel angle α is at 15 °~45 ° in the present embodiment.
In the application, the first cone 11 and the second cone 12 presentation size on the direction away from facies basialis pyramidis 121 are gradual
The cone structure of diminution, and realize that size and 211 size of input terminal of integrator 2 match at the top of the second cone 12.This
In application, the top of the second cone 12 is provided with cable connector 122, and cable connector 122 is connected with the input terminal 211 of integrator 2,
Integrator is used to improving the low-and high-frequency response characteristic of cone capacitance sensor 1, and the rc integrating circuit 22 in the present embodiment is preferred
Resistance scope be the Ω of 20 Ω~80, capacitor's capacity scope is 50pF~2nF, if in preferable resistance value and capacitance scope
Outside, then waveform measurement effect can be caused to be deteriorated.
In a kind of selectable embodiment, the first cone 11 and the second cone 12 are made using metallic aluminium, to realize
Excellent electric conductivity, reduces the wave impedance of the first cone 11 and the second cone 12.
In the application, the output terminal 212 of integrator 2 is connected with one end of harvester 3, the harvester 3 in the application
Sample rate and frequency bandwidth are chosen according to tested voltage signal, by being sampled to tested voltage signal, voltage signal is turned
Change digital signal into, also, the other end of harvester is connected with industrial personal computer 4, so as to fulfill the number for being converted into harvester
Word signal is sent to industrial personal computer 4, and industrial personal computer 4 shows surveyed voltage waveform according to the digital signal that the sampling of harvester 3 obtains,
And the actual waveform of special fast transient overvoltage is calculated by intrinsic standoff ratio.In addition, industrial personal computer 4 can also adopting to harvester 3
Sample rate and frequency band are regulated and controled, so that harvester adapts to different measuring environments.In the application, industrial personal computer can be with defeated
Enter the industrial control computer of output equipment, display device and external interface, for the concrete model of industrial control computer, sheet
Field technology personnel can voluntarily be determined according to cost and using factors such as scales, be not specifically limited in the present embodiment.
In a kind of selectable embodiment, the harvester 3 of the application is capture card, and capture card can be according to default
Sample frequency and the voltage signal that export to integrator 2 of sampling bandwidth sample, and the voltage signal turn obtained will be sampled
Change in digital signal and export.At the same time in order to realize that capture card can adapt to various extreme test situations, capture card can use
Storage battery is solar powered, and externally fed is not depended on to realize.
In another selectable embodiment, the harvester 3 of the application can also use oscillograph, due to oscillography
Device also possesses the function of data sampling and A/D conversions, therefore can also realize that the voltage signal exported to integrator 2 is adopted
Sample, and the voltage signal conversion obtained will be sampled in digital signal and exported.
In a kind of selectable embodiment, shielding case 31 is provided with outside harvester 3.In the application, due to adopting
Acquisition means 3 are used to be sampled the voltage signal that integrator 2 exports, and will sample the voltage signal conversion obtained in numeral letter
Number and export, therefore the accuracy that harvester 3 samples affects the accuracy of measurement, therefore, in order to avoid harvester 3 by
To outside electromagnetic interference, the present embodiment is provided with shielding case 31 outside harvester 3.
From above technical scheme, this application provides a kind of special fast transient overvoltage measuring system, including：Cone electricity
Hold sensor, integrator, harvester and industrial personal computer；Wherein, cone capacitance sensor is provided with the first cone and the second cone；
First cone is co-axially located inside the second cone, and dielectric film is filled between the first cone and the second cone；Second cone
It is provided with facies basialis pyramidis；Integrator includes housing and the rc integrating circuit being arranged in housing, and input terminal is provided with housing
And output terminal；Cable connector is provided with the top of second cone, the second cone is connected by the input terminal of cable connector and integrator
Connect；The output terminal of integrator and one end of harvester connect；The other end of harvester is connected with industrial personal computer.The application provides
The fast transient overvoltage measuring system of spy in use, being arranged in the reserved window of GIS pipelines, and be fixed on connecing for reserved window
On ground shell；The facies basialis pyramidis of second cone and the conductor in GIS pipelines, and the filling gas between facies basialis pyramidis and conductor
Form high voltage arm capacitor；First cone forms low-voltage capacitance arm capacitance with the second cone and dielectric film, in cone structure
Low-voltage arm capacitance is more than the low-voltage arm capacitance of flat capacitance sensor under identical induction area, makes the cone electricity in the application
Holding sensor has the intrinsic standoff ratio of bigger and broader frequency band；In addition, in the application, since low-voltage arm capacitance is in cone structure,
Cone capacitance sensor is formed size gradation in voltage direction of wave travel, be connected smoothly with integrator, realize cone
Bulk wave impedance is seamlessly transitted to integrator wave impedance, internal system voltage is matched, and avoids voltage wave in cone capacitance
Catadioptric is produced in sensor and causes oscillating waveform and distortion, so as to fulfill the accurate measurement to VFTO.
Embodiment two
Fig. 4 is the structure diagram of the special fast transient overvoltage measuring system of the another kind shown in the embodiment of the present application two.Such as
Shown in Fig. 4, the difference between this embodiment and the first embodiment lies in：
Electro-optic device 5 and photoelectric conversion device 6, harvester 3 are additionally provided between harvester 3 and industrial personal computer 4
It is electrically connected with electro-optic device 5, industrial personal computer 4 is electrically connected with photoelectric conversion device 6, electro-optic device 5 and opto-electronic conversion dress
6 are put to connect by optical fiber long distance.
The digital signal that harvester 3 exports can be converted into optical signal by the electro-optic device 5 in the present embodiment.It is logical
Cross optical fiber and send photoelectric conversion device 6 to, optical signal can be reduced into electric signal by photoelectric conversion device 6, and be inputted to industry control
Machine 4.Since GIS device usually sets up distance, the fast transient overvoltage measurement point of spy on GIS pipelines 8 with where industrial personal computer 4
Control centre or monitoring station are often separated by very long distance, in order to realize that fast the remote of transient overvoltage special to GIS device is surveyed
Measure, by connecting electro-optic device 5 in the output side of harvester 3 in the present embodiment, measuring signal is turned by electric signal
Change optical signal into, the characteristics of using low-loss long distance transmission, realize the remote transmission of measuring signal, and in measuring signal
Receiving terminal sets photoelectric conversion device 6, optical signal reduction is filled in electric signal and input to industrial personal computer, industrial personal computer 4 according to collection
The digital signal for putting 3 samplings acquisition shows surveyed voltage waveform, and special fast transient overvoltage is calculated by intrinsic standoff ratio
Actual waveform.In addition, industrial personal computer 4 reversely can also be inputted control signal by photoelectric conversion device 6, control signal is changed
Into optical signal, electro-optic device 5 is transferred at a distance, and optical signal is reduced into control signal, realization pair by electro-optic device 5
The sample rate of harvester 3 and the remote control and regulation of frequency band.
Electro-optic device 5 and photoelectric conversion device 6 in the application can use fiber optical transceiver of the prior art,
Other can also be used to realize electrical-optical conversion and the equipment that optical-electronic is changed, filled for electro-optic device 5 and opto-electronic conversion
6 concrete form is put, is not specifically limited in the present embodiment.
The embodiment of the present application, is turned by being provided with electro-optic device 5 and photoelectricity between harvester 3 and industrial personal computer 4
Changing device 6, realizes the long-range measurement to GIS device VFTO, also, if installed in control centre or monitoring station one or
Multiple industrial personal computers, connect multiple measurement points, it is possible to realize and multiple measurement points are carried out in a control centre or monitoring station
Measurement is concentrated, drastically increases measurement efficiency.
Fig. 5 is the lightning impulse voltage waveform diagram that a kind of special fast transient overvoltage measuring system of the application is measured,
Wherein A is primary voltage waveform, and B distributed coax circular cone sensors measure waveform.Very fast transient overvoltage as can be seen from Figure 5
Measuring system is Well-recovered to long wave coda wave shape, i.e., low frequency response is good.
Fig. 6 is the voltage waveform that the rising edge that a kind of special fast transient overvoltage measuring system of the application is measured is less than 10ns
Schematic diagram, wherein A are primary voltage waveform, and B measures waveform for distributed coax circular cone sensor.Express fast wink as can be seen from Figure 6
State over-voltage measurement system can be intact reduction rising edge be less than the high frequency voltage waveform of 10ns, i.e. high frequency response is good.This says
The bright measuring system can completely restore the high fdrequency component and low frequency component of VFTO waveforms.
From above technical scheme, this application provides a kind of special fast transient overvoltage measuring system, including：Cone electricity
Hold sensor, integrator, harvester and industrial personal computer；Wherein, cone capacitance sensor is provided with the first cone and the second cone；
First cone is co-axially located inside the second cone, and dielectric film is filled between the first cone and the second cone；Second cone
It is provided with facies basialis pyramidis；Integrator includes housing and the rc integrating circuit being arranged in housing, and input terminal is provided with housing
And output terminal；Cable connector is provided with the top of second cone, the second cone is connected by the input terminal of cable connector and integrator
Connect；The output terminal of integrator and one end of harvester connect；The other end of harvester is connected with industrial personal computer.The application provides
The fast transient overvoltage measuring system of spy in use, being arranged in the reserved window of GIS pipelines, and be fixed on connecing for reserved window
On ground shell；The facies basialis pyramidis of second cone and the conductor in GIS pipelines, and the filling gas between facies basialis pyramidis and conductor
Form high voltage arm capacitor；First cone forms low-voltage capacitance arm capacitance with the second cone and dielectric film, in cone structure
Low-voltage arm capacitance is more than the low-voltage arm capacitance of flat capacitance sensor under identical induction area, makes the cone electricity in the application
Holding sensor has the intrinsic standoff ratio of bigger and broader frequency band；In addition, in the application, since low-voltage arm capacitance is in cone structure,
Cone capacitance sensor is formed size gradation in voltage direction of wave travel, be connected smoothly with integrator, realize cone
Bulk wave impedance is seamlessly transitted to integrator wave impedance, internal system voltage is matched, and avoids voltage wave in cone capacitance
Catadioptric is produced in sensor and causes oscillating waveform and distortion, so as to fulfill the accurate measurement to VFTO.
It should be noted that herein, the relational terms of such as " first " and " second " or the like are used merely to one
A entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operate it
Between there are any actual relationship or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Cover non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only include those
Key element, but also including other elements that are not explicitly listed, or further include as this process, method, article or set
Standby intrinsic key element.
Those skilled in the art will readily occur to the application after considering specification and putting into practice utility model disclosed herein
Other embodiments.This application is intended to cover any variations, uses, or adaptations of the application, these modifications, use
Way or adaptive change follow the general principle of the application and including undocumented in the art known of the application
General knowledge or conventional techniques.Description and embodiments are considered only as exemplary, and the true scope and spirit of the application are under
The claim in face is pointed out.
It should be appreciated that the precision architecture that the application is not limited to be described above and is shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.Scope of the present application is only limited by appended claim.
Claims (10)
- A kind of 1. special fast transient overvoltage measuring system, it is characterised in that including：Cone capacitance sensor (1), integrator (2), Harvester (3) and industrial personal computer (4)；The cone capacitance sensor (1) is provided with the first cone (11) and the second cone (12)；First cone (11) is same Axis is arranged on the second cone (12) inside, is situated between first cone (11) and second cone (12) filled with electricity Plasma membrane (13)；Second cone (12) bottom is provided with facies basialis pyramidis (121)；The integrator (2) includes housing (21) and the rc integrating circuit (22) being arranged in the housing (21), the shell Input terminal (211) and output terminal (212) are provided with body (21)；Cable connector is provided with the top of second cone (12) (122), second cone (12) is same by the input terminal (211) of the cable connector (122) and the integrator (2) Axis connection；The output terminal (212) of the integrator (2) is connected with one end of the harvester (3)；The harvester (3) the other end is connected with the industrial personal computer (4).
- 2. special fast transient overvoltage measuring system according to claim 1, it is characterised in that the harvester (3) and Electro-optic device (5) and photoelectric conversion device (6), the harvester (3) and institute are additionally provided between the industrial personal computer (4) Electro-optic device (5) electrical connection is stated, the industrial personal computer (4) is electrically connected with the photoelectric conversion device (6), the electro-optic conversion Device (5) is connected with photoelectric conversion device (6) by optical fiber long distance.
- 3. special fast transient overvoltage measuring system according to claim 1, it is characterised in that the first cone (11) bag The scope of bevel angle α, the bevel angle α are included between 15 degree of -45 degree.
- 4. special fast transient overvoltage measuring system according to claim 1, it is characterised in that the institute of the integrator (2) It is cylinder type hollow housing to state housing (21).
- 5. special fast transient overvoltage measuring system according to claim 1, it is characterised in that the harvester (3) is Analog acquisition card or oscillograph.
- 6. special fast transient overvoltage measuring system according to claim 5, it is characterised in that the harvester (3) is outside Portion is provided with shielding case (31).
- 7. special fast transient overvoltage measuring system according to claim 1, it is characterised in that the cable connector (122) For banana connector made of metal.
- 8. special fast transient overvoltage measuring system according to claim 1, it is characterised in that the rc integrating circuit (22) resistance scope is the Ω of 20 Ω~80, and the capacitor's capacity scope of the rc integrating circuit (22) is 50pF~2nF.
- 9. special fast transient overvoltage measuring system according to claim 1, it is characterised in that first cone (11) and Second cone (12) is made using metallic aluminium.
- 10. special fast transient overvoltage measuring system according to claim 1, it is characterised in that the institute of the integrator (2) Housing (21) is stated to be made using metal.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111239472A (en) * | 2020-02-07 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Overvoltage monitoring sensor |
| US20210175007A1 (en) * | 2018-04-16 | 2021-06-10 | Siemens Aktiengesellschaft | Measuring method and high-voltage transducer with clean air |
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2017
- 2017-10-16 CN CN201721340865.8U patent/CN207232234U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210175007A1 (en) * | 2018-04-16 | 2021-06-10 | Siemens Aktiengesellschaft | Measuring method and high-voltage transducer with clean air |
| US12002617B2 (en) * | 2018-04-16 | 2024-06-04 | Hsp Hochspannungsgeräte Gmbh | Measuring method and high-voltage transducer with clean air |
| CN111239472A (en) * | 2020-02-07 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Overvoltage monitoring sensor |
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