CN106771661B - A kind of project of transmitting and converting electricity power-frequency electric field strength monitoring system - Google Patents
A kind of project of transmitting and converting electricity power-frequency electric field strength monitoring system Download PDFInfo
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- CN106771661B CN106771661B CN201611040385.XA CN201611040385A CN106771661B CN 106771661 B CN106771661 B CN 106771661B CN 201611040385 A CN201611040385 A CN 201611040385A CN 106771661 B CN106771661 B CN 106771661B
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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
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
Abstract
The invention discloses a kind of project of transmitting and converting electricity power-frequency electric field strengths to monitor system, the system comprises: sensor, signal transmssion line, display device, bracket, the sensor is connect by signal transmssion line with the display device, the sensor is fixed on the bracket, wherein, the capacitor of the bracket is less than 0.5pF, and the equivalent resistance of the bracket is greater than 50G ohm, it is smaller to realize power-frequency electric field strength monitoring systematic error, the accurate technical effect of monitoring result.
Description
Technical field
The present invention relates to project of transmitting and converting electricity power-frequency electric field strengths to monitor field, and in particular, to a kind of project of transmitting and converting electricity work
Frequency electric field strength monitors system.
Background technique
Influence of the power transmission and transforming equipment to surrounding enviroment mainly has electromagnetic radiation, noise, ecological environment, visual impact etc..Its
In, power frequency electromagnetic field is the Major environment impacts problem of electric power facility.Therefore, it is necessary to project of transmitting and converting electricity power-frequency electric field strength into
Row monitoring.
In the prior art, mainly project of transmitting and converting electricity power-frequency electric field strength is carried out using power-frequency electric field strength monitoring system
Monitoring, but existing power-frequency electric field strength monitoring system is frequently present of error, and error is larger, causes monitoring result inaccurate
Really.
In conclusion present inventor has found above-mentioned technology extremely during realizing the present application technical solution
It has the following technical problems less:
In the prior art, that there are errors is larger for existing power-frequency electric field strength monitoring system, monitoring result inaccuracy
Technical problem.
Summary of the invention
The present invention provides a kind of project of transmitting and converting electricity power-frequency electric field strengths to monitor system, solves existing power frequency electric field strength
Monitoring system there are errors larger, the technical problem of monitoring result inaccuracy is spent, power-frequency electric field strength monitoring system mistake is realized
Poor smaller, the accurate technical effect of monitoring result.
It is confirmed by the research of inventor and measured data, in the monitoring of project of transmitting and converting electricity power-frequency electric field strength, by passing
The accuracy of sensor, signal transmssion line, display device, the power-frequency electric field strength monitoring system of bracket composition is in relative air humidity
It being influenced by air humidity very big after greater than 50%, causes capacitor to increase after increasing due to ambient humidity, equivalent resistance becomes smaller,
The power frequency electric field distribution for influencing project of transmitting and converting electricity, causes power-frequency electric field strength measured value to reach as high as 2-8 times of normal value, to solve
Certainly current monitoring system when relative air humidity is greater than 50% existing obvious errors and do the invention；Therefore, of the invention
The technical issues of need to find that in tradition when there is large error, staff is pair by a large amount of research
Sensor, signal transmssion line are studied and are improved, it is believed that simple bracket influences less monitoring result, and the application is exactly
The such technology prejudice of customer service, it was found that bracket is an important factor for influencing monitoring result.
In order to solve the above technical problems, this application provides a kind of project of transmitting and converting electricity power-frequency electric field strengths to monitor system, institute
The system of stating includes: sensor, signal transmssion line, display device, bracket, and the sensor passes through signal transmssion line and the display
Device connection, the sensor is fixed on the bracket, wherein the capacitor of the bracket is less than 0.5pF, the bracket etc.
It imitates resistance and is greater than 50G ohm.When the capacitor of bracket is less than 0.5pF, and the equivalent resistance of bracket is greater than 50G ohm, environmental wet
Degree will influence the performance of bracket smaller, become larger in 50% when in ambient humidity, power-frequency electric field strength monitors the accurate of system
Degree obtains effective guarantee.Capacitor is caused to increase after increasing due to ambient humidity, equivalent resistance becomes smaller, and influences the work of project of transmitting and converting electricity
Frequency field distribution, bracket in the application can reduction by a relatively large margin because ambient humidity leads to bracket reduced performance and then causes
Power-frequency electric field strength measurement error.
Further, the material of the bracket is engineering plastics.Utilizing works plastic processing at bracket in actual test
In influenced by ambient humidity smaller, caused error is also smaller.
Further, the bracket is 0 DEG C~40 DEG C in environment temperature, and in 20%~95% range of relative air humidity
Under the conditions of, when applying 1000V, 2000V, 3000V, 4000V, 5000V voltage respectively to bracket, the capacitance of bracket is respectively less than
0.5pF, and the equivalent resistance of bracket is all larger than 50G ohm.
Further, the bracket is specially tripod, and the vertical range of foot prop distance from bottom foot prop tie point is 60cm,
Foot prop tie point is 90cm apart from vertical range at the top of tripod.The capacitor that can reduce bracket is designed in this way, increases bracket
Equivalent resistance further such that bracket performance is not easily susceptible to the influence of relative air humidity and temperature, and then ensures substation
The accuracy of the monitoring of power-frequency electric field strength.
The method that the present invention takes is that the physics category of bracket used has been determined by binding isotherm investigation and comparison measured data
Property be influence measurement result fundamental factor, and on this basis selection, design, process, produce current prison can be greatly reduced
The bracket of error of the measurement equipment system when relative humidity is greater than 50%.
The present invention employs the principle that monitor system according to power-frequency electric field strength forms with ultra-high-tension power transmission line, the earth
Circuit, the Analysis of Equivalent Circuit based on capacitance group, by circuit counting, binding isotherm calculated value and ultra-high-tension power transmission line power frequency electric
Field intensity measured value has studied a variety of presentations and fundamental factor for generating error, it is determined that power-frequency electric field strength prison is greatly reduced
The method of examining system error when relative humidity is greater than 50%, design, processing and fabricating provide it is standby relative air humidity 20%~
It is used in 95% range and can guarantee that worst error is no more than the bracket of normal value 10% in this humidity range.
Key point of the invention, which is to find, influences high-voltage testing room power-frequency electric field strength measurement result by environmental wet
The fundamental factor influenced is spent, theoretically analyzes and solve error source, and determine material and shape, capacitor and the impedance of bracket
Equal attributes.
The material of bracket is engineering plastics, but is not limited only to such material, and any volume resistivity and surface hydrophobicity are excellent
In the insulating materials of engineering plastics；
The physical attribute of bracket: (common environmental temperature is usually 0~40 DEG C, but is not limited only under the conditions of common temperature
This temperature range), in 20~95% range of relative air humidity, 5000V voltage measurement capacitance is less than 0.5pF, and equivalent electricity
Resistance is greater than 50G ohm；
The shape, structure and size of bracket are protection points.The shape of bracket is Three-legged, after normal placement, the connection of three feet
Point is away from measurement plane of reference 60cm, straight-bar segment length 90cm；
The shape of bracket is not limited to A-frame, it is any for the measurement of high-voltage testing room power-frequency electric field strength can be with
So that power-frequency electric field strength monitoring sensor is above the ground level, the supporter of certain altitude (0.3m~2m) can be with.
One or more technical solution provided by the present application, has at least the following technical effects or advantages:
Capacitor is designed as less than 0.5pF, equivalent resistance greater than 50G ohm due to using for original sensor bracket to be substituted for
Bracket, using the bracket designed in this way, the influence that environment is received when relative humidity is greater than 50% is smaller, power-frequency electric field strength
The monitoring precision of monitoring system ensured, so, solve existing power-frequency electric field strength monitoring there are errors larger, prison
Survey result inaccuracy technical problem, and then realize power-frequency electric field strength monitor error it is smaller, the accurate technology of monitoring result
Effect.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention；
Fig. 1 is the composition schematic diagram of project of transmitting and converting electricity power-frequency electric field strength monitoring system in the application；
Fig. 2 is the structural schematic diagram of project of transmitting and converting electricity power-frequency electric field strength monitoring bracket in the application；
Wherein, 1- straight section support rod, 2- terminal pad, 3- trishores, 4- bracket, 5- sensor, 6- signal transmssion line, 7-
Display device.
Specific embodiment
The present invention provides a kind of project of transmitting and converting electricity power-frequency electric field strengths to monitor system, solves existing power frequency electric field strength
Monitoring system there are errors larger, the technical problem of monitoring result inaccuracy is spent, power-frequency electric field strength monitoring system mistake is realized
Poor smaller, the accurate technical effect of monitoring result.
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the case where not conflicting mutually, the application's
Feature in embodiment and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
Implemented with being different from the other modes being described herein in range using other, therefore, protection scope of the present invention is not by under
The limitation of specific embodiment disclosed in face.
Embodiment one:
In example 1, a kind of project of transmitting and converting electricity power-frequency electric field strength monitoring system is provided, referring to FIG. 1, described
System includes: sensor 5, signal transmssion line 6, display device 7, bracket 4, and the sensor is shown by signal transmssion line with described
Showing device connection, the sensor are fixed on the bracket, wherein the capacitor of the bracket specifically: are less than 0.5pF, institute
State the equivalent resistance of bracket specifically: be greater than 50G ohm.
Referring to FIG. 2, wherein, bracket specifically includes: 1- straight section support rod, 2- terminal pad, 3- trishores.
Further, the material of the bracket is engineering plastics.
Further, the bracket is 0 DEG C~40 DEG C in environment temperature, and in 20%~95% range of relative air humidity
Under the conditions of, when applying 1000V, 2000V, 3000V, 4000V, 5000V voltage respectively to bracket, the capacitance of bracket is respectively less than
0.5pF, and the equivalent resistance of bracket is all larger than 50G ohm.
Further, the bracket is specially tripod, and the vertical range of foot prop distance from bottom foot prop tie point is 60cm,
Foot prop tie point is 90cm apart from vertical range at the top of tripod.
The method that the present invention takes is that the physics category of bracket used has been determined by binding isotherm investigation and comparison measured data
Property be influence measurement result fundamental factor, and on this basis selection, design, process, produce current prison can be greatly reduced
The bracket of error of the measurement equipment system when relative humidity is greater than 50%.
The present invention employs the principle that monitor system according to power-frequency electric field strength forms with ultra-high-tension power transmission line, the earth
Circuit, the Analysis of Equivalent Circuit based on capacitance group, by circuit counting, binding isotherm calculated value and ultra-high-tension power transmission line power frequency electric
Field intensity measured value has studied a variety of presentations and fundamental factor for generating error, it is determined that power-frequency electric field strength prison is greatly reduced
The method of examining system error when relative humidity is greater than 50%, design, processing and fabricating provide it is standby relative air humidity 20%~
It is used in 95% range and can guarantee that worst error is no more than the bracket of normal value 10% in this humidity range.
Key point of the invention, which is to find, influences high-voltage testing room power-frequency electric field strength measurement result by environmental wet
The fundamental factor influenced is spent, theoretically analyzes and solve error source, and determine material and shape, capacitor and the impedance of bracket
Equal attributes.
The material of bracket is engineering plastics, but is not limited only to such material, and any volume resistivity and surface hydrophobicity are excellent
In the insulating materials of engineering plastics；
The physical attribute of bracket: (common environmental temperature is usually 0~40 DEG C, but is not limited only under the conditions of common temperature
This temperature range), in 20~95% range of relative air humidity, 5000V voltage measurement capacitance is less than 0.5pF, and equivalent electricity
Resistance is greater than 50G ohm；
The shape, structure and size of bracket are protection points.The shape of bracket is Three-legged, after normal placement, the connection of three feet
Point is away from measurement plane of reference 60cm, straight-bar segment length 90cm；
The shape of bracket is not limited to A-frame, it is any for the measurement of high-voltage testing room power-frequency electric field strength can be with
So that power-frequency electric field strength monitoring sensor is above the ground level, the supporter of certain altitude (0.3m~2m) can be with.
One or more technical solution provided by the present application, has at least the following technical effects or advantages:
Capacitor is designed as less than 0.5pF, equivalent resistance greater than 50G ohm due to using for original sensor bracket to be substituted for
Bracket, using the bracket designed in this way, the influence that environment is received when relative humidity is greater than 50% is smaller, power-frequency electric field strength
The monitoring precision of monitoring system ensured, so, solve existing power-frequency electric field strength monitoring there are errors larger, prison
Survey result inaccuracy technical problem, and then realize power-frequency electric field strength monitor error it is smaller, the accurate technology of monitoring result
Effect.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (3)
1. a kind of project of transmitting and converting electricity power-frequency electric field strength monitors system, which is characterized in that the system comprises: sensor, signal
Transmission line, display device, bracket, the sensor are connect by signal transmssion line with the display device, and the sensor is solid
Determine on the bracket, wherein the bracket is 0 DEG C ~ 40 DEG C in environment temperature, and in 20% ~ 95% range of relative air humidity
Under the conditions of, when applying 1000V, 2000V, 3000V, 4000V, 5000V voltage respectively to bracket, the capacitance of bracket is respectively less than
0.5pF, and the equivalent resistance of bracket is all larger than 50G ohm.
2. project of transmitting and converting electricity power-frequency electric field strength according to claim 1 monitors system, which is characterized in that the bracket
Material is engineering plastics.
3. project of transmitting and converting electricity power-frequency electric field strength according to claim 1 monitors system, which is characterized in that the bracket tool
Body is tripod, and the vertical range of foot prop distance from bottom foot prop tie point is 60cm, and foot prop tie point hangs down at the top of tripod
Straight distance is 90cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611040385.XA CN106771661B (en) | 2016-11-21 | 2016-11-21 | A kind of project of transmitting and converting electricity power-frequency electric field strength monitoring system |
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| CN201611040385.XA CN106771661B (en) | 2016-11-21 | 2016-11-21 | A kind of project of transmitting and converting electricity power-frequency electric field strength monitoring system |
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| CN106771661A CN106771661A (en) | 2017-05-31 |
| CN106771661B true CN106771661B (en) | 2019-08-13 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107462777A (en) * | 2017-09-15 | 2017-12-12 | 中国电力科学研究院 | A kind of system and method for being used to carry out multichannel power frequency electric field measurement under high humidity conditions |
| CN108761274A (en) * | 2018-05-28 | 2018-11-06 | 国网河南省电力公司电力科学研究院 | Extra-high voltage alternating current-direct current parallel powerline electromagnetic environment continuous monitoring trolley |
| CN108801344A (en) * | 2018-05-28 | 2018-11-13 | 国网河南省电力公司电力科学研究院 | Extra-high voltage alternating current-direct current parallel powerline electromagnetic environment continuous monitoring system |
| CN113804983A (en) * | 2021-09-23 | 2021-12-17 | 北京森馥科技股份有限公司 | Power frequency electric field measuring device, system and method |
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| CN202903896U (en) * | 2012-10-22 | 2013-04-24 | 山西省电力公司长治供电分公司 | Wireless power frequency electric field intensity measuring device |
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| US7239148B2 (en) * | 2003-12-04 | 2007-07-03 | Ricoh Company, Ltd. | Method and device for measuring surface potential distribution |
| CN2878574Y (en) * | 2006-02-21 | 2007-03-14 | 曹世龙 | Crossed concrete reinforced bar supporter |
| JP5082793B2 (en) * | 2007-11-19 | 2012-11-28 | 日本電気株式会社 | Printed circuit board design support apparatus, printed circuit board design support method, and printed circuit board design support program |
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| CN202903896U (en) * | 2012-10-22 | 2013-04-24 | 山西省电力公司长治供电分公司 | Wireless power frequency electric field intensity measuring device |
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