CN106771660A - A kind of project of transmitting and converting electricity power-frequency electric field strength measures support performance measurement method - Google Patents
A kind of project of transmitting and converting electricity power-frequency electric field strength measures support performance measurement method Download PDFInfo
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- CN106771660A CN106771660A CN201611039313.3A CN201611039313A CN106771660A CN 106771660 A CN106771660 A CN 106771660A CN 201611039313 A CN201611039313 A CN 201611039313A CN 106771660 A CN106771660 A CN 106771660A
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
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- 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
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- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Testing Relating To Insulation (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses a kind of project of transmitting and converting electricity power-frequency electric field strength measurement support performance measurement method, methods described includes：Step 1：The electric capacity of support to be measured is obtained using high voltage dielectric loss instrument；Step 2：The equivalent resistance of support to be measured is obtained using Insulation Resistance Tester；Step 3：Support electric capacity and equivalent resistance based on measurement, support performance is evaluated, realizing can select qualified support by this method, and the error of power-frequency electric field strength monitoring can be reduced using the qualified support selected, and ensure the accuracy rate technique effect of monitoring result.
Description
Technical field
The present invention relates to project of transmitting and converting electricity power-frequency electric field strength fields of measurement, in particular it relates to a kind of project of transmitting and converting electricity work
Frequency electric field intensity measuremenrt support performance measurement method.
Background technology
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.Accordingly, it would be desirable to enter to project of transmitting and converting electricity power-frequency electric field strength
Row monitoring.
In the prior art, it is main project of transmitting and converting electricity power-frequency electric field strength is carried out using power-frequency electric field strength monitoring system
Monitoring, but using power-frequency electric field strength monitoring system through being commonly present error, and error is larger, causes monitoring result inaccurate.
In sum, present inventor has found above-mentioned technology extremely during the present application technical scheme is realized
There is following technical problem less：
In the prior art, existing power-frequency electric field strength monitoring has that error is larger, the inaccurate technology of monitoring result
Problem.
The content of the invention
The invention provides a kind of project of transmitting and converting electricity power-frequency electric field strength measurement support performance measurement method, solve existing
Power-frequency electric field strength monitoring have that error is larger, the inaccurate technical problem of monitoring result, realizing can by this method
Qualified support is selected, the error of power-frequency electric field strength monitoring can be reduced using the qualified support selected, ensure monitoring
The accuracy rate technique effect of result.
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
Sensor, signal transmssion line, display device, the degree of accuracy of the power-frequency electric field strength monitoring system of support composition are in relative air humidity
Influenceed very big by air humidity after more than 50%, due to causing electric capacity to increase after ambient humidity increase, equivalent resistance diminishes,
The power frequency electric field distribution of project of transmitting and converting electricity is influenceed, causes power-frequency electric field strength measured value to reach as high as 2-8 times of normal value, be solution
Certainly current monitoring system when relative air humidity is more than 50% the error that exists and do this invention；Therefore, skill of the invention
Art problem needs to be found by substantial amounts of research, and in tradition when there is larger error, staff is to sensing
Device, signal transmssion line are studied and improved, it is believed that simple support is little on monitoring result influence, and the application exactly customer service
Such technology prejudice, it was found that support is the key factor for influenceing 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 strength measurement support performance
Measuring method, methods described includes：
Step 1：The electric capacity of support to be measured is obtained using high voltage dielectric loss instrument；
Step 2：The equivalent resistance of support to be measured is obtained using Insulation Resistance Tester；
Step 3：Based on the support electric capacity and equivalent resistance of measurement, support performance is evaluated.
Further, the step 3 is specifically included：
At 0 DEG C~40 DEG C, in the range of relative air humidity 20%~95%, support to be measured is applied respectively 1000V,
2000V, 3000V, 4000V, 5000V voltage, if support capacitance to be measured is respectively less than 0.5pF, and support equivalent resistance to be measured
50G ohm is all higher than, then the support performance to be measured is qualified；Otherwise, the support to be measured is unqualified.Due to being led after ambient humidity increase
Appearance increase is sent a telegraph, equivalent resistance diminishes, influence the power frequency electric field distribution of project of transmitting and converting electricity, and the support in the application can be with larger
The reduction of amplitude reduces the power-frequency electric field strength measurement error caused by because ambient humidity causes support performance.
Further, the electric capacity of the support is less than 0.5pF, and the equivalent resistance of the support is more than 50G ohm.
Further, the material of the support is engineering plastics.Utilizing works plastic processing into support in actual test
In influenceed smaller by ambient humidity, caused error is also smaller.
Further, the support is specially tripod, and the vertical range of foot stool distance from bottom foot stool tie point is 60cm,
Foot stool tie point is 90cm apart from tripod plan vertical distance.So design can reduce the electric capacity of support, increase support
Equivalent resistance, further such that support performance is not easily susceptible to the influence of relative air humidity and temperature, and then ensures transformer station
The accuracy of the monitoring of power-frequency electric field strength.
At present in transmission line of electricity, the monitoring of the power-frequency electric field strength of transformer station, to the branch for supporting measurement sensor
Frame and its performance have no requirement.But find that support is more than 50% in relative air humidity from substantial amounts of fieldtesting results
When, power frequency electric field test result error is very big, and test value reaches as high as 2-8 times of normal value, and minimal error have also exceeded just
The 40% of constant value.In order to more accurately measure the power-frequency electric field strength of project of transmitting and converting electricity, it is necessary to for measurement sensor branch
The performance of frame formulates evaluation criterion and measuring method.
The method that the present invention takes is by substantial amounts of experimental study and in-site measurement, it is determined that the performance mark of sensing support
Standard, and corresponding measuring method is formulated, its performance under different moisture levels environment is made stipulations.
The present invention use principle be：Constituted according to power-frequency electric field strength monitoring system and ultra-high-tension power transmission line, the earth
Circuit, the Analysis of Equivalent Circuit based on capacitances in series, by circuit counting, binding isotherm calculated value and ultra-high-tension power transmission line power frequency
Electric-field intensity measured value, have studied the various presentations and basic factor for producing error, and project of transmitting and converting electricity power frequency is used for by regulation
The performance and measuring method of the sensor stand of electric field intensity measuremenrt, it is ensured that the support that design, processing and fabricating go out is relative in air
In the range of humidity 20%-95% using and can ensure that in this humidity range worst error is no more than normal value 10%.
Key point of the invention is to find influence high-voltage testing room power-frequency electric field strength measurement result to receive environmental wet
The basic reason of influence is spent, error source is found from theory analysis, determine that support performance is key factor, and by substantial amounts of reality
The physical property that support performance is determined is tested, and it influences the critical value of measurement result.The present invention is intended to protect：
Support physical property measuring method：(common environmental temperature is usually 0-40 DEG C, every 5 DEG C in the range of common temperature
One measurement point is set), in the range of relative air humidity 20-95% (during less than 50% per 10%RH humidity ranges, higher than 50%
When a measurement point is set per 5%RH humidity ranges) under environmental condition, apply 1000 to support, 2000,3000,4000,
The parameter such as its electric capacity of 5000V voltage measurements and equivalent resistance；So design metering system can be good according to temperature and humidity
Change, support is measured, so the convenient change to temperature and humidity the electric capacity and equivalent resistance of support are changed into
Row research.
Measuring apparatus：High voltage dielectric loss instrument (capacitance measurement), Insulation Resistance Tester (equivalent resistance measurement),
One or more technical schemes that the application is provided, at least have the following technical effect that or advantage：
It is designed as including as a result of by project of transmitting and converting electricity power-frequency electric field strength measurement support performance measurement method：Step
1：The electric capacity of support to be measured is obtained using high voltage dielectric loss instrument；Step 2：The equivalent of support to be measured is obtained using Insulation Resistance Tester
Resistance；Step 3：Based on measurement support electric capacity and equivalent resistance, the technical scheme evaluated support performance, so, have
Effect solves the monitoring of existing power-frequency electric field strength and has that error is larger, the inaccurate technical problem of monitoring result, and then realizes
Qualified support can be selected by this method, can reduce power-frequency electric field strength using the qualified support selected monitors
Error, ensure monitoring result accuracy rate technique effect.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes of the application
Point, do not constitute the restriction to the embodiment of the present invention；
Fig. 1 is the schematic flow sheet of project of transmitting and converting electricity power-frequency electric field strength measurement support performance measurement method in the application.
Specific embodiment
The invention provides a kind of project of transmitting and converting electricity power-frequency electric field strength measurement support performance measurement method, solve existing
Power-frequency electric field strength monitoring have that error is larger, the inaccurate technical problem of monitoring result, realizing can by this method
Qualified support is selected, the error of power-frequency electric field strength monitoring can be reduced using the qualified support selected, ensure monitoring
The accuracy rate technique effect of result.
It is below in conjunction with the accompanying drawings and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention
Mode is applied to be further described in detail the present invention.It should be noted that in the case where not conflicting mutually, the application's
Feature in embodiment and embodiment can be mutually combined.
Many details are elaborated in the following description in order to fully understand the present invention, but, the present invention may be used also
Implemented with the other modes in the range of using other being different from being described herein, therefore, protection scope of the present invention do not receive down
The limitation of specific embodiment disclosed in face.
Embodiment one：
In embodiment one, Fig. 1 is refer to, there is provided a kind of project of transmitting and converting electricity power-frequency electric field strength measurement support performance is surveyed
Amount method, methods described includes：
Step 1：The electric capacity of support to be measured is obtained using high voltage dielectric loss instrument；
Step 2：The equivalent resistance of support to be measured is obtained using Insulation Resistance Tester；
Step 3：Based on the support electric capacity and equivalent resistance of measurement, support performance is evaluated.
Further, the step 3 is specifically included：
At 0 DEG C~40 DEG C, in the range of relative air humidity 20%~95%, support to be measured is applied respectively 1000V,
2000V, 3000V, 4000V, 5000V voltage, if support capacitance to be measured is respectively less than 0.5pF, and support equivalent resistance to be measured
50G ohm is all higher than, then the support performance to be measured is qualified；Otherwise, the support to be measured is unqualified.
Further, the electric capacity of the support is specially：Less than 0.5pF, the equivalent resistance of the support is specially：It is more than
50G ohm.Employ the branch for original sensor support being substituted for and being designed as electric capacity less than 0.5pF, equivalent resistance more than 50G ohm
Frame, using the support of such design, the influence that environment is received when relative humidity is more than 50% is smaller, power-frequency electric field strength monitoring
The monitoring precision of system is ensured.
Further, the material of the support is engineering plastics.
Further, the support is specially tripod, and the vertical range of foot stool distance from bottom foot stool tie point is 60cm,
Foot stool tie point is 90cm apart from tripod plan vertical distance.
At present in transmission line of electricity, the monitoring of the power-frequency electric field strength of transformer station, to the branch for supporting measurement sensor
Frame and its performance have no requirement.But find that support is more than 50% in relative air humidity from substantial amounts of fieldtesting results
When, power frequency electric field test result error is very big, and test value reaches as high as 2-8 times of normal value, and minimal error have also exceeded just
The 40% of constant value.In order to more accurately measure the power-frequency electric field strength of project of transmitting and converting electricity, it is necessary to for measurement sensor branch
The performance of frame formulates evaluation criterion and measuring method.
The method that the present invention takes is by substantial amounts of experimental study and in-site measurement, it is determined that the performance mark of sensing support
Standard, and corresponding measuring method is formulated, its performance under different moisture levels environment is made stipulations.
The present invention use principle be：Constituted according to power-frequency electric field strength monitoring system and ultra-high-tension power transmission line, the earth
Circuit, the Analysis of Equivalent Circuit based on capacitances in series, by circuit counting, binding isotherm calculated value and ultra-high-tension power transmission line power frequency
Electric-field intensity measured value, have studied the various presentations and basic factor for producing error, and project of transmitting and converting electricity power frequency is used for by regulation
The performance and measuring method of the sensor stand of electric field intensity measuremenrt, it is ensured that the support that design, processing and fabricating go out is relative in air
In the range of humidity 20%-95% using and can ensure that in this humidity range worst error is no more than normal value 10%.
Key point of the invention is to find influence high-voltage testing room power-frequency electric field strength measurement result to receive environmental wet
The basic reason of influence is spent, error source is found from theory analysis, determine that support performance is key factor, and by substantial amounts of reality
The physical property that support performance is determined is tested, and it influences the critical value of measurement result.The present invention is intended to protect：
Support physical property measuring method：(common environmental temperature is usually 0-40 DEG C, every 5 DEG C in the range of common temperature
One measurement point is set), in the range of relative air humidity 20-95% (during less than 50% per 10%RH humidity ranges, higher than 50%
When a measurement point is set per 5%RH humidity ranges) under environmental condition, apply 1000 to support, 2000,3000,4000,
The parameter such as its electric capacity of 5000V voltage measurements and equivalent resistance；So design metering system can be good according to temperature and humidity
Change, support is measured, so the convenient change to temperature and humidity the electric capacity and equivalent resistance of support are changed into
Row research.
Measuring apparatus：High voltage dielectric loss instrument (capacitance measurement), Insulation Resistance Tester (equivalent resistance measurement),
One or more technical schemes that the application is provided, at least have the following technical effect that or advantage：
It is designed as including as a result of by project of transmitting and converting electricity power-frequency electric field strength measurement support performance measurement method：Step
1：The electric capacity of support to be measured is obtained using high voltage dielectric loss instrument；Step 2：The equivalent of support to be measured is obtained using Insulation Resistance Tester
Resistance；Step 3：Based on measurement support electric capacity and equivalent resistance, the technical scheme evaluated support performance, so, have
Effect solves the monitoring of existing power-frequency electric field strength and has that error is larger, the inaccurate technical problem of monitoring result, and then realizes
Qualified support can be selected by this method, can reduce power-frequency electric field strength using the qualified support selected monitors
Error, ensure monitoring result accuracy rate technique effect.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification without deviating from essence of the invention to the present invention
God and scope.So, if these modifications of the invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (6)
1. a kind of project of transmitting and converting electricity power-frequency electric field strength measures support performance measurement method, it is characterised in that methods described includes：
Step 1：The electric capacity of support to be measured is obtained using high voltage dielectric loss instrument；
Step 2：The equivalent resistance of support to be measured is obtained using Insulation Resistance Tester；
Step 3：Based on the support electric capacity and equivalent resistance of measurement, support performance is evaluated.
2. project of transmitting and converting electricity power-frequency electric field strength according to claim 1 measures support performance measurement method, and its feature exists
In the step 3 is specifically included：
At 0 DEG C~40 DEG C, in the range of relative air humidity 20%~95%, support to be measured is applied respectively 1000V, 2000V,
3000V, 4000V, 5000V voltage, if support capacitance to be measured is respectively less than 0.5pF, and support equivalent resistance to be measured is all higher than
50G ohm, then the support performance to be measured is qualified；Otherwise, the support to be measured is unqualified.
3. project of transmitting and converting electricity power-frequency electric field strength according to claim 2 measures support performance measurement method, and its feature exists
In, one measurement point of every 5 DEG C of settings when relative air humidity is less than 50%, a measurement point is set per 10%RH humidity ranges,
When relative air humidity is higher than 50% a measurement point is set per 5%RH humidity ranges.
4. project of transmitting and converting electricity power-frequency electric field strength according to claim 1 measures support performance measurement method, and its feature exists
In the electric capacity of the support is less than 0.5pF, and the equivalent resistance of the support is more than 50G ohm.
5. project of transmitting and converting electricity power-frequency electric field strength according to claim 1 measures support performance measurement method, and its feature exists
In the material of the support is engineering plastics.
6. project of transmitting and converting electricity power-frequency electric field strength according to claim 1 measures support performance measurement method, and its feature exists
In the support is specially tripod, and the vertical range of foot stool distance from bottom foot stool tie point is 60cm, foot stool tie point distance
Tripod plan vertical distance is 90cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611039313.3A CN106771660B (en) | 2016-11-21 | 2016-11-21 | A kind of project of transmitting and converting electricity power-frequency electric field strength measurement bracket performance measurement method |
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| CN201611039313.3A CN106771660B (en) | 2016-11-21 | 2016-11-21 | A kind of project of transmitting and converting electricity power-frequency electric field strength measurement bracket performance measurement method |
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| CN106771660A true CN106771660A (en) | 2017-05-31 |
| CN106771660B CN106771660B (en) | 2019-07-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107957567A (en) * | 2017-11-21 | 2018-04-24 | 国网四川省电力公司电力科学研究院 | A kind of calibration system and calibration method for power frequency electric field test system |
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