CN110488103A - Spatial electronic field measurement system - Google Patents
Spatial electronic field measurement system Download PDFInfo
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- CN110488103A CN110488103A CN201910801436.3A CN201910801436A CN110488103A CN 110488103 A CN110488103 A CN 110488103A CN 201910801436 A CN201910801436 A CN 201910801436A CN 110488103 A CN110488103 A CN 110488103A
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- electric field
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- insulation reference
- insulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/12—Measuring electrostatic fields or voltage-potential
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- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The present invention proposes a kind of spatial electronic field measurement system and method, wherein system includes insulation reference object and measurement subsystem, wherein insulation reference object is located in detected space electric field；Subsystem is measured, for acquiring the charge on insulation reference object, and determines according to charge the electric field of detected space electric field.The system directly obtains the intensity of the space electric field at this containing space charge by measurement accumulation to the charge of space any position insulator surface, the technical issues of solving the electric field that can only measure ground in the prior art, can not accurately measuring space any position electric field.
Description
Technical field
The present invention relates to High-Voltage Technology field more particularly to a kind of spatial electronic field measurement system and method.
Background technique
When DC transmission line works normally, corona discharge is difficult to avoid that, thus there are positive and negative charged particle around conducting wire,
And entire space will be full of the band ionization generated by corona between polar conductor and the earth between DC line two-stage conducting wire
Son, the directed movement under DC electric field effect of these charged particles, the electric field of generation are known as Ion Flow Field.
Studies have shown that the body surface meeting Accumulating charge being exposed in Ion Flow Field causes all under DC electric field effect
More harm.It is the electromagnetic environment for influencing transmission of electricity corridor, especially electric field strength first.Secondly charge buildup is near transmission of electricity corridor
Object on, as warm canopy insulation film on, these charges can generate higher current potential, be electrically shocked if people's contact may generate
Danger.Here, the presence of surface charge will lead to dielectric surface electric field distortion nearby, local field strength is caused to increase sharply.Meanwhile table
Surface charge can be used as " kind charge of the electron ", make the reduction of edge flashing voltage.The insulation performance of insulator is had an impact, is caused absolutely
The decline of edge performance.Therefore test DC power transmission line Ion Flow Field is extremely important.
Current test DC power transmission line Ion Flow Field is using rotary voltmeter or vibration voltmeter, these measurement dresses
Setting must be grounded, therefore can only be used to measure the electric field on ground.If for measuring space electric field, due to depositing for ground lead
Causing tested electric field distortion serious, can not accurately measure.Therefore there is presently no under test stream transmission line of electricity ion stream effect
The effective ways of space electric field.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, the first purpose of this invention is to propose a kind of spatial electronic field measurement system, it is tired by measurement to realize
Product directly obtains the intensity of the space electric field at this containing space charge to the charge of space any position insulator surface, solves
The technical issues of electric field on ground can only be measured in the prior art, can not accurately measure space electric field.
In order to achieve the above object, first aspect present invention embodiment proposes a kind of spatial electronic field measurement system, comprising: insulation
Reference and measurement subsystem, wherein the insulation reference object is located in detected space electric field；The measurement subsystem,
For acquiring the charge on the insulation reference object, and determine according to the charge electric field of the detected space electric field.
In embodiments of the present invention, further includes: insulating supporting component, electrified wire and DC power supply, wherein described
DC power supply is electrically connected with the electrified wire, the insulating supporting component, is used to support the electrified wire and is located at sky
Between in；The DC power supply makes the electrified wire generate corona and puts for providing DC voltage for the electrified wire
Electricity forms the space electric field.
In embodiments of the present invention, the insulation reference object includes at least one.
In embodiments of the present invention, the insulation reference object includes: round insulation Reference.
In embodiments of the present invention, the measurement subsystem, comprising: Faraday cup, digital charge meter and computation module,
The Faraday cup and the digital charge meter, the total charge dosage on the surface for detecting the insulation reference object；The meter
Component is calculated, for calculating the electric field in tested region space according to the total charge dosage.
In order to achieve the above object, second aspect of the present invention embodiment proposes a kind of spatial electronic field measurement method, including following
Step: the residual charge on removal insulation reference object；The insulation reference object for removing the residual charge is placed in tested
In space electric field；After preset duration, the insulation reference object is taken out along electric field descent direction；Pass through measurement subsystem inspection
The total charge dosage on the surface of the insulation reference object is surveyed, and calculates the electricity of the detected space electric field according to the total charge dosage
.
In embodiments of the present invention, the total electrical charge for detecting the surface of the insulation reference object by measuring subsystem
Amount, comprising: the total charge dosage on the surface of the insulation reference object is detected by Faraday cup and the digital charge meter；Pass through
The total charge dosage calculates the electric field in tested region space.
In embodiments of the present invention, the electric field that tested region space is calculated by the total charge dosage, comprising: according to
The surface area of the insulation reference object and the total charge dosage calculate mean charge surface density；It is obtained according to electric Field Calculation formula
The electric field, wherein the electric Field Calculation formula are as follows:
EσFor the electric field, σ is the mean charge surface density, ε0For dielectric constant of air.
Above-mentioned technical proposal at least has the following technical effect that
It is directly obtained at this by the charge of measurement accumulation to space any position insulator surface containing space charge
The intensity of space electric field, solves the electric field that can only measure ground in the prior art, and the technology that can not accurately measure space electric field is asked
Topic.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, in which:
Fig. 1 is a kind of spatial electronic field measurement system schematic provided by the embodiment of the present invention；
Fig. 2 is a kind of reduced scale DC power transmission line experimental system structural schematic diagram provided by the embodiment of the present invention；
Fig. 3 is a kind of reduced scale DC power transmission line experimental system schematic diagram of a scenario provided by the embodiment of the present invention；
Fig. 4 is a kind of flow diagram of spatial electronic field measurement method provided by the embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings the spatial electronic field measurement system and method for the embodiment of the present invention are described.
Fig. 1 is a kind of structural schematic diagram of spatial electronic field measurement system provided by the embodiment of the present invention.As shown in Figure 1,
The system includes: insulation reference object 10 and measurement subsystem 20, wherein insulation reference object 10 is located at detected space electric field
In,
Wherein, insulation reference object 10 can be one or more, can be round insulation Reference, can be other
Shape, insulation reference object 10 includes but is not limited to: polythene material, alternatively, epoxy material, alternatively, silastic material.
Subsystem 20 is measured, determines detected space electricity for acquiring the charge on insulation reference object 10, and according to charge
The electric field of field.
Wherein, in different application scenarios, the producing method of detected space electric field is different, possible shows as a kind of
Example, the system further include: insulating supporting component 30, electrified wire 40 and DC power supply 50, insulating supporting component 30 are used for
Support electrified wire is positioned in the space；
DC power supply 50 makes electrified wire 40 generate corona discharge for providing DC voltage for electrified wire 40,
Form detected space electric field.
For example, as a kind of possible implementation, as shown in Fig. 2, insulating supporting component 30 includes: arranged symmetrically
The first insulating support and the second insulating support, wherein the both ends of electrified wire 40 respectively with the first insulating support and second absolutely
The connection of edge bracket.Electrified wire in the present embodiment is long 2m, the constantan wire of diameter 0.3mm, in the first insulating support and second
Under the support of insulating support, conducting wire is in tensioned state, and terrain clearance is 0.74m at the center of conducting wire.In conjunction with actually answering
, preferably to realize experiment effect, in the present embodiment, 3mm thickness, diameter are used during actual measurement with scene Fig. 3
The insulation disk of 8cm forms a line insulation disk as insulation reference object, with conducting wire at vertical direction, is suspended on conducting wire
At the terrain clearance 0.3m of underface, make its adsorption charge amount between electric field.
In one embodiment of the invention, with continued reference to Fig. 2, measuring subsystem 20 includes: Faraday cup, digital charge
Instrument and computation module (computer equipment etc. being not marked in figure out), Faraday cup and digital charge meter, for detecting insulation
The total charge dosage on the surface of Reference, computation module, for calculating the electric field in tested region space according to total charge dosage.
The electric field for how calculating detected space electric field is illustrated below with reference to spatial electronic field measurement embodiment of the method.
Specifically, Fig. 4 is the flow chart of spatial electronic field measurement method according to an embodiment of the invention, such as Fig. 4 institute
Show, this method comprises:
Step 101, the residual charge on insulation reference object is removed.
In one embodiment of the invention, it can use alcohol reagent cleaning insulation reference object surface, to insulation reference
Object surface alcohol reagent air-dry after, by insulation reference object be put into Faraday cup measure its institute it is electrically charged, it is ensured that the quantity of electric charge zero.
Step 102, the insulation reference object for removing residual charge is placed in detected space electric field.
Specifically, the insulation reference object for removing residual charge is placed in detected space electric field, may be implemented to insulate
Charge in the Reference automatic absorbing space electric field.
For example, the insulation column of suitable length is chosen, and is placed in position appropriate, is controlled using insulation clip exhausted
Edge Reference is located on insulation column and is in pre-determined distance range with electrified wire, is placed on preset measured zone, In
Under the electric field of electrified wire, insulation reference body surface in space can stored charge, in this example, choose 2m, diameter
The constantan wire of 0.3mm, and it is 0.74m that conducting wire, which is fixed on apart from ground level, using insulation shelf, utilizes DC power supply
Give conducting wire power supply, insulation reference object can choose thick, diameter 8cm heat insulating lamella using 3mm, be suspended on immediately below conducting wire from
At ground height 0.3m.Since the scene used is under DC electric field effect, electrified wire leads to direct current.Electrified wire is flat
Row is in ground, that is to say, that conducting wire is in tensioned state, tests needs to meet, terrain clearance can be at the center of conducting wire
0.74m or other parameters.
Step 103, after preset duration, insulation reference object is taken out along electric field descent direction.
It should be understood that after preset duration, due to the projecting electricity of the electric field of its charge generation adsorbed
, the no longer newly-increased adsorption charge of heat insulating lamella, and the charge being adsorbed onto will not dissipate.If the area risen by electric field
Domain, then this region insulation thin slice can also adsorption charge, therefore its absorption charge can change, thus, at this time can will
Insulation reference object takes out along electric field descent direction, for example, being removed insulation reference object using insulation clip.
In the present embodiment, which can be 30 minutes or more by many experiments discovery or other are longer
Time can determine according to the voltage swing of power supply, the insulation reference object after preset duration, under electrified wire electric field
Surface charge does not continue to accumulate, at this point, insulation reference body surface accumulation charge generate reversed electric field by with it is original
Space electric field is equal.In practical implementation, it can determine whether preset duration reaches based on timer.
Step 104, the total charge dosage on the surface of insulation reference object is detected by measurement subsystem, and according to total charge dosage
Calculate the electric field of detected space electric field.
In the present embodiment, it when experiment just starts, is tested by faraday's bucket and determines that its electricity is zero, when by one section
Between after, by the insulation reference object of taking-up be put into faraday bucket, to obtain charge；Control assembly, according to specific calculation method, instead
Push away the electric field for calculating electrified wire.
That is, the tool of the charge on the surface of insulation reference object is detected as a kind of mode in the cards, it can
To use faraday's bucket, in the present embodiment, heat insulating lamella is placed on to the total charge dosage that heat insulating lamella is measured in faraday's bucket.In
Under electrified wire electric field, the insulator surface meeting stored charge in space, but charge will not be accumulated down always, when accumulation electricity
When lotus is enough, the reversed electric field generated will be equal with original space electric field, at this point, gas at air and insulator interface
Side electric field normal component En=0, thus charge will not continue to assemble toward dielectric surface.Due to the stored charge amount of insulator surface
It is directly related with original space electric field, therefore original space can be obtained by the stored charge of measurement insulator surface
Electric field, original space electric field is equal to E at heat insulating lamella suspensionσ。
In the present embodiment, mean charge surface density can be calculated according to the surface area and charge of insulation reference object, i.e., will
Total charge dosage obtains the mean charge surface density σ on heat insulating lamella divided by the area of heat insulating lamella, then according to electric Field Calculation public affairs
Formula obtains electric field, wherein electric Field Calculation formula is following formula (1):
EσFor electric field, σ is mean charge surface density, ε0For dielectric constant of air.
To sum up, the spatial electronic field measurement method of the embodiment of the present invention passes through measurement space any position insulator surface
Stored charge, obtain its generation reversed electric field, when enough due to stored charge, reversed electric field by with original space electric field
It is equal, therefore the intensity of the space electric field at this containing space charge can be directly obtained, solution can only measure ground in the prior art
The electric field in face, the technical issues of can not accurately measuring space electric field.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing custom logic function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system, including the system of processor or other can be held from instruction
The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium ", which can be, any may include, stores, communicates, propagates or pass
Defeated program is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment
It sets.The more specific example (non-exhaustive list) of computer-readable medium include the following: there is the electricity of one or more wirings
Interconnecting piece (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable
Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.Such as, if realized with hardware in another embodiment, following skill well known in the art can be used
Any one of art or their combination are realized: have for data-signal is realized the logic gates of logic function from
Logic circuit is dissipated, the specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), scene can compile
Journey gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
It, can also be in addition, each functional unit in each embodiment of the present invention can integrate in a processing module
It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..Although having been shown and retouching above
The embodiment of the present invention is stated, it is to be understood that above-described embodiment is exemplary, and should not be understood as to limit of the invention
System, those skilled in the art can be changed above-described embodiment, modify, replace and become within the scope of the invention
Type.
Claims (8)
1. a kind of spatial electronic field measurement system characterized by comprising insulation reference object and measurement subsystem, wherein described
Insulation reference object is located in detected space electric field；
The measurement subsystem determines the quilt for acquiring the charge on the insulation reference object, and according to the charge
Survey the electric field of space electric field.
2. the system as claimed in claim 1, which is characterized in that further include: insulating supporting component, electrified wire and direct current supply
Power supply, wherein the DC power supply is electrically connected with the electrified wire,
The insulating supporting component is used to support the electrified wire and is positioned in the space；
The DC power supply makes the electrified wire generate corona and puts for providing DC voltage for the electrified wire
Electricity forms the detected space electric field.
3. the system as claimed in claim 1, which is characterized in that the insulation reference object includes at least one.
4. the system as claimed in claim 1, which is characterized in that the insulation reference object includes:
Round insulation Reference.
5. the system as claimed in claim 1, which is characterized in that the measurement subsystem, comprising: Faraday cup, digital charge
Instrument and computation module,
The Faraday cup and the digital charge meter, the total charge dosage on the surface for detecting the insulation reference object；
The computation module, for calculating the electric field of detected space electric field according to the total charge dosage.
6. a kind of spatial electronic field measurement method, which comprises the following steps:
Remove the residual charge on insulation reference object；
The insulation reference object for removing the residual charge is placed in detected space electric field；
After preset duration, the insulation reference object is taken out along electric field descent direction；
The total charge dosage for detecting the surface of the insulation reference object by measuring subsystem, and calculated according to the total charge dosage
The electric field of the detected space electric field.
7. method as claimed in claim 6, which is characterized in that described to detect the insulation reference object by measurement subsystem
Surface total charge dosage, comprising:
The total charge dosage on the surface of the insulation reference object is detected by Faraday cup and the digital charge meter；
The electric field of the detected space electric field is calculated by the total charge dosage.
8. the method as described in claim 1, which is characterized in that described to calculate tested region space by the total charge dosage
Electric field, comprising:
Mean charge surface density is calculated according to the surface area of the insulation reference object and the total charge dosage；
The electric field is obtained according to electric Field Calculation formula, wherein the electric Field Calculation formula are as follows:
EσFor the electric field, σ is the mean charge surface density, ε0For dielectric constant of air.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112034268A (en) * | 2020-05-28 | 2020-12-04 | 中国电力科学研究院有限公司 | Method and system for measuring space electric field for eliminating charge accumulation effect |
| CN115616302A (en) * | 2022-09-27 | 2023-01-17 | 国网江苏省电力有限公司南通供电分公司 | Method and device for accumulating and detecting charge potential of insulating layer of direct current lead |
| CN115616302B (en) * | 2022-09-27 | 2024-02-13 | 国网江苏省电力有限公司南通供电分公司 | Method and device for collecting and detecting charge and potential of insulating layer of direct-current lead |
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