CN106053970A - Earth electrode potential distribution measurement method - Google Patents
Earth electrode potential distribution measurement method Download PDFInfo
- Publication number
- CN106053970A CN106053970A CN201610346221.3A CN201610346221A CN106053970A CN 106053970 A CN106053970 A CN 106053970A CN 201610346221 A CN201610346221 A CN 201610346221A CN 106053970 A CN106053970 A CN 106053970A
- Authority
- CN
- China
- Prior art keywords
- point
- earthing pole
- potential
- distance
- reference points
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- 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
- G01R29/14—Measuring field distribution
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention discloses an earth electrode potential distribution measurement method, comprising n measuring points according to earth electrode positions and landform conditions; separately measuring the potential difference of two reference points corresponding to each measuring point under earth electrode actual earth current; according to U'm=Um*Imax/Ic, obtaining the potential difference between two reference points corresponding to each measuring point under earth electrode maximum earth current; obtaining the potential value of each measuring point according to the potential difference between two reference points corresponding to each measuring point under earth electrode maximum earth current; and obtaining an earth electrode potential image according to the potential value of each measurement point. The earth electrode potential distribution measurement method can greatly reduce the workload of earth electrode potential measurement, and does not need artificial long distance paying-off.
Description
Technical field
The present invention relates to current conversion station earthing pole field of measuring technique, be specifically related to a kind of earthing pole Potential distribution measurement side
Method.
Background technology
Compared with ac transmission engineering, HVDC Transmission Technology has two main special aspects: the change of current and ground connection.At a distance
D.C. high voltage transmission uses ground return circuit, can improve operational reliability, saves electric energy loss on the line, it is possible to make work
Journey built by separate periods, has obvious economic benefit.Therefore, except indivedual exceptions (back-to-back engineering), existing HVDC long distance
From power transmission engineering bar none using ground return circuit as one of method of operation, direct current grounding pole has at home and abroad obtained widely
Application.
Earthing pole is as the important component part of DC transmission system, and the impact of surrounding be can not be ignored by it, docking
It is the important means of analysis grounding pole effect on environment that earth polar Potential distribution measures.Prior art is measured earthing pole current potential
Distribution needs manually to arrange the test circuit of more than ten kms, thus there is unwrapping wire difficulty, big, the measurement inconvenience of workload etc. and ask
Topic.
Summary of the invention
To be solved by this invention is to measure the problem that earthing pole Potential distribution unwrapping wire is difficult, workload is big, measure inconvenience.
The present invention is achieved through the following technical solutions:
A kind of earthing pole Potential distribution measuring method, including: select n survey according to earthing pole present position and orographic condition
Amount point, wherein, the m-1 measure point to earthing pole central point distance less than m-th measure point arrive earthing pole central point away from
From, 2≤m≤n, n are the positive integer not less than 2；Obtain each point of measuring and arrive the distance of earthing pole central point；Measure each respectively
Measuring the potential difference under the actual earth current of earthing pole between two reference points that point is corresponding, m-th measures two that point is corresponding
Individual reference point measures centered by point and be positioned at earthing pole central point by m-th and m-th is measured on the ray that point determines；According to
U'm=Um×Imax÷IcObtain each current potential measured between two reference points that point is corresponding under earthing pole maximum earth current
Difference, wherein, U'mThe potential difference measured between two reference points that point is corresponding under earthing pole maximum earth current for m-th, Um
The potential difference measured between two reference points that point is corresponding under the actual earth current of earthing pole for m-th, ImaxFor earthing pole
Big earth current, IcFor the actual earth current of earthing pole；Measure between two reference points that point is corresponding at earthing pole according to each
Potential difference under maximum earth current obtains each potential value measuring point；Earthing pole is obtained according to each potential value measuring point
Potential image.
The earthing pole Potential distribution measuring method that the present invention provides, can reduce the work of earthing pole potential measurement significantly
Measure, it is not necessary to artificial distance unwrapping wire, under non-plain topography, this measuring method effect is the most notable.Further, the present invention provides
Measuring method can measure at multiple spot, to reduce because earthing pole earth current changes the measurement error brought, it is adaptable to connect simultaneously
Potential measurement under the normal operating conditions of earth polar, is particularly suited for the measurement during high-power test in short-term.Further, the present invention
The measuring method provided is scientific and reasonable, it is possible to economizing on resources to greatest extent, reliability is high, practical.
Optionally, each selection of measuring point is in ground even, ground moistening, the place of uniform resistivity.According to earthing pole
Orographic condition chooses measurement point, can reduce the error brought because of orographic condition to measurement result, improves the accuracy of measurement result.
Optionally, each some distance to earthing pole central point of measuring is less than 10 kms.Along with in measurement point to earthing pole
The distance of heart point is increasing, and the potential value change measuring point is the most inconspicuous, thus can be by each point of measuring to earthing pole center
The distance of point is arranged in the range of less than 10 kms, reduces workload further.
Optionally, the ray that earthing pole central point and each measurement point determine is with the angle absolute value constituted with reference to ray not
More than 30 degree, described it is earthing pole central point with reference to ray and ray that offside change of current website determines.Earthing pole central point is with every
The individual ray that determines of point of measuring is the least with the angle absolute value constituted with reference to ray, each Potential distribution measured closer to etc.
Potential distribution, measurement result is the most accurate.
Optionally, each distance measured between two reference points that point is corresponding meets: 10 meters≤Lm≤100 meter, wherein,
Lm is the distance that m-th measures between two reference points that point is corresponding.Each measure between two reference points that point is corresponding away from
From the least, the error brought to measurement result is the biggest；Each distance measured between two reference points that point is corresponding is the biggest, work
Measure the biggest.Each distance measured between two reference points that point is corresponding is arranged in the range of 10 meters to 100 meters, can
Ensure the accuracy of measurement result, the biggest workload will not be brought again.
Optionally, the distance between two reference points of the m-1 measurement point correspondence is not more than m-th measurement point correspondence
Distance between two reference points.
Optionally, integration by parts is used to obtain each potential value measuring point.
Optionally, it is thus achieved that each potential value measuring point includes: according to Em=U'm÷ Lm obtains each electric field measuring point
Intensity, wherein, EmMeasure the electric field intensity of point for m-th, Lm be m-th measure between two reference points that point is corresponding away from
From；According to U (xn)=xn×EnObtain the potential value of the n-th measurement point, wherein, U (xn) it is the potential value of the n-th measurement point, xn
It is the n-th measurement distance of putting earthing pole central point, EnIt is the electric field intensity of the n-th measurement point；According toObtain the potential value of remaining each measurement point, wherein, U (xm-1) it is
M-1 the potential value measuring point, xmThe point distance to earthing pole central point, x is measured for m-thm-1It is that the m-1 measurement point arrives
The distance of earthing pole central point, Em-1It is the m-1 the electric field intensity measuring point, EmThe electric field intensity of point is measured for m-th.
The present invention compared with prior art, has such advantages as and beneficial effect:
The earthing pole Potential distribution measuring method that the present invention provides, can reduce the workload of earthing pole potential measurement, nothing
Need artificial distance unwrapping wire, the most notable in regional effect with a varied topography.Further, the measuring method that the present invention provides can be carried out
Multiple spot is measured simultaneously, reduces owing to earthing pole earth current changes the measurement error brought.Further, the measurement that the present invention provides
Method can economize on resources and human cost, and reliability is high, practical.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present invention, constitutes of the application
Point, it is not intended that the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the selected structural representation measuring point of the embodiment of the present invention；
Fig. 2 is the Potential distribution curve synoptic diagram that the embodiment of the present invention obtains.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, to this
Invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment
The embodiment of the present invention provides a kind of earthing pole Potential distribution measuring method, including:
Step S1, selects n to measure point according to earthing pole present position and orographic condition, wherein, measures point for the m-1 and arrive
The distance of earthing pole central point measures the some distance to earthing pole central point less than m-th, and 2≤m≤n, n not less than 2 are just
Integer.Specifically, Fig. 1 is the selected structural representation measuring point of the embodiment of the present invention.Obtain earthing pole design drawing, including
Earthing pole central point O, interior polar ring radius R1, outer polar ring radius R2 and principal set up thereof, and use high-precision GPS position finder or
Other position finders obtain the coordinate of earthing pole central point O.In the present embodiment, measure some A1, measure some A2, measurement point A3, survey
Amount point A4 ..., measurement point An are chosen at the place of ground even, ground moistening, uniform resistivity, and ground connection is put in each measurement
The distance of pole central point O is less than 10 kms.The ray that earthing pole central point O and each measurement point determine is constituted with reference ray
Angle absolute value is less than 30 degree, and described reference ray is earthing pole central point O and the ray that determines of offside change of current website, i.e. schemes
In 1, the absolute value of angle θ is less than 30 degree, measure a some A1, measure a some A2, measure a some A3, measure some an A4 ..., measuring a some An can not
On the same line.Further, quantity n measuring point can be configured according to the actual requirements, and the value of n is the biggest, measurement result
The most accurate, but required workload is the biggest.Measure some An the least to the distance of earthing pole central point O, measure some Am to measuring some A
(m-1) distance is the least.Increasing to the distance of earthing pole central point O along with measuring point, measure the potential value change of point more
Inconspicuous, thus in place the nearest for distance earthing pole central point O, measurement point distribution is the most intensive.
Step S2, it is thus achieved that the distance of earthing pole central point is put in each measurement.Specifically, measurement point is obtained with position finder
A1, measure a some A2, measure a some A3, measure some an A4 ..., measure the coordinate of some An, according to the coordinate of earthing pole central point O and each
The individual coordinate measuring point, calculates each point of measuring and arrives the distance of earthing pole central point O.For convenience of statement, measure some Am to connecing
The distance of earth polar central point O is designated as xm。
Step S3, measures respectively and each measures between two reference points that point is corresponding under the actual earth current of earthing pole
Potential difference, m-th is measured two reference points corresponding to point and is measured centered by point by m-th and be positioned at earthing pole central point and m
On the ray that individual measurement point determines.With reference to Fig. 1, the distance measured between two reference points corresponding to some A1 is L1, measures some A2
The corresponding distance between two reference points is L2, and the distance measured between two reference points corresponding to some A3 is L3, measures point
The distance between two reference points corresponding for A4 is L4 ..., the distance measured between two reference points corresponding to some An is Ln.
In the present embodiment, each distance measured between two reference points that point is corresponding meets: 10 meters≤Lm≤100 meter, wherein, and Lm
Measure the distance between two reference points that point is corresponding for m-th, between the m-1 two reference point measuring some correspondence away from
Distance between two reference points that no more than m-th measurement point is corresponding, i.e. L1≤L2≤L3≤L4≤...≤Ln, this choosing
Access method can reduce measurement error.
Step S4, according to U'm=Um×Imax÷IcObtain each measurement between two reference points that point is corresponding at earthing pole
Potential difference under maximum earth current, wherein, U'mMeasure between two reference points that point is corresponding maximum at earthing pole for m-th
Potential difference under earth current, UmMeasure between two reference points that point is corresponding under the actual earth current of earthing pole for m-th
Potential difference, ImaxFor earthing pole maximum earth current, IcFor the actual earth current of earthing pole.Specifically, earthing pole maximum enters ground
Electric current is maximum earth current during current conversion station operation, and the actual earth current of earthing pole is to measure UmTime the ground connection simultaneously measured
Pole earth current.Owing to earthing pole Potential distribution is to consider in the case of earthing pole maximum earth current, thus will be by each survey
The potential difference measured between two reference points that point is corresponding under the actual earth current of earthing pole is scaled each measurement point correspondence
Potential difference under earthing pole maximum earth current between two reference points.
Step S5, according to each current potential measured between two reference points that point is corresponding under earthing pole maximum earth current
Difference obtains each potential value measuring point.In the present embodiment, integration by parts is used to obtain each potential value measuring point.Tool
Body ground, it is thus achieved that each potential value measuring point includes:
Step S51, according to Em=U'm÷ Lm obtains each electric field intensity measuring point, wherein, EmPoint is measured for m-th
Electric field intensity, Lm is the distance that m-th measures between two reference points that point is corresponding.
Step S52, according to U (xn)=xn×EnObtain the potential value of the n-th measurement point, wherein, U (xn) it is the n-th measurement
The potential value of point, xnIt is the n-th measurement distance of putting earthing pole central point O, EnIt is the electric field intensity of the n-th measurement point.
According to Theory of Electromagnetic Field, the metal hemisphere being embedded in ground, leaked into the earth by hemisphere, at soil resistivity when there being electric current
Time uniformly, electric current line is equably along ball radial emission, therefore the electric current density at distance centre of sphere distance x isWherein, σ (x) is the electric current density at centre of sphere x, and unit is amperes per square meter；I is that grounding body flows into
Earth current, unit ampere；X is the distance to the centre of sphere, unit rice.Electric field intensity at distance centre of sphere x rice isWherein, ρ is soil resistivity.Therefore, (radius is x to measure some Ann) to infinite point
Potential difference isxnAnd EnIt is given data, substitutes into above formula i.e.
The potential value measuring some An can be drawn.
Step S53, according toObtain the electricity of remaining each measurement point
Place value, wherein, U (xm-1) it is the m-1 potential value measuring point, xmThe point distance to earthing pole central point is measured for m-th,
xm-1It is the m-1 and measures the some distance to earthing pole central point, Em-1It is the m-1 the electric field intensity measuring point, EmFor m-th
Measure the electric field intensity of point.According to integral principle, measuring some A (n-1) to the potential difference of infinite point is:
I.e. measure the potential value of some A (n-1).In like manner can obtain measuring the potential value U (x of some A (n-2)n-2) ..., measure
Potential value U (the x of some A11)。
Step S6, obtains earthing pole potential image according to each potential value measuring point.Specifically, to measure point to connecing
The distance of earth polar central point O be abscissa, the potential value measuring point be that vertical coordinate sets up rectangular coordinate system, Fig. 2 is that the present invention is real
Execute the Potential distribution curve synoptic diagram that example obtains.Wherein, some Xm abscissa be measure some Am to earthing pole central point O away from
From, the vertical coordinate of some Xm is the potential value measuring some Am, and carry out curve fitting available earthing pole current potential minute to various discrete point
Cloth curve.Those skilled in the art know how to carry out curve fitting discrete point, do not repeat them here.
Above-described detailed description of the invention, has been carried out the purpose of the present invention, technical scheme and beneficial effect further
Describe in detail, be it should be understood that the detailed description of the invention that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, all should comprise
Within protection scope of the present invention.
Claims (8)
1. an earthing pole Potential distribution measuring method, it is characterised in that including:
Select n to measure point according to earthing pole present position and orographic condition, wherein, measure point to earthing pole center for the m-1
The distance of point measures the some distance to earthing pole central point less than m-th, and 2≤m≤n, n are the positive integer not less than 2；
Obtain each point of measuring and arrive the distance of earthing pole central point；
Measure each potential difference measured between two reference points that point is corresponding under the actual earth current of earthing pole, m respectively
Two reference points of individual measurement point correspondence measure centered by point and be positioned at earthing pole central point by m-th and m-th measurement point is true
On fixed ray；
According to U'm=Um×Imax÷IcObtain each measurement between two reference points that point is corresponding at earthing pole maximum earth current
Under potential difference, wherein, U'mMeasure between two reference points that point is corresponding under earthing pole maximum earth current for m-th
Potential difference, UmThe potential difference measured between two reference points that point is corresponding under the actual earth current of earthing pole for m-th, Imax
For earthing pole maximum earth current, IcFor the actual earth current of earthing pole；
Obtain each according to each potential difference measured between two reference points that point is corresponding under earthing pole maximum earth current
Measure the potential value of point；
Earthing pole potential image is obtained according to each potential value measuring point.
A kind of earthing pole Potential distribution measuring method the most according to claim 1, it is characterised in that each selection of measuring point
In ground even, ground moistening, the place of uniform resistivity.
A kind of earthing pole Potential distribution measuring method the most according to claim 1, it is characterised in that each measurement is put and connect
The distance of earth polar central point is less than 10 kms.
A kind of earthing pole Potential distribution measuring method the most according to claim 1, it is characterised in that earthing pole central point and
The each some ray determined and angle absolute value constituted with reference to ray measured is less than 30 degree, and described is earthing pole with reference to ray
The ray that central point and offside change of current website determine.
A kind of earthing pole Potential distribution measuring method the most according to claim 1, it is characterised in that each measurement point is corresponding
Two reference points between distance meet: 10 meters≤Lm≤100 meter, wherein, Lm is two references that m-th measures that point is corresponding
Distance between point.
A kind of earthing pole Potential distribution measuring method the most according to claim 5, it is characterised in that measure point for the m-1
The corresponding distance between two reference points is not more than m-th and measures the distance between two reference points that point is corresponding.
7. according to a kind of earthing pole Potential distribution measuring method described in any one of claim 1 to 6, it is characterised in that use
Integration by parts obtains each potential value measuring point.
A kind of earthing pole Potential distribution measuring method the most according to claim 7, it is characterised in that obtain each measurement point
Potential value include:
According to Em=U'm÷ Lm obtains each electric field intensity measuring point, wherein, EmThe electric field intensity of point, Lm is measured for m-th
The distance between two reference points that point is corresponding is measured for m-th；
According to U (xn)=xn×EnObtain the potential value of the n-th measurement point, wherein, U (xn) it is the potential value of the n-th measurement point, xn
It is the n-th measurement distance of putting earthing pole central point, EnIt is the electric field intensity of the n-th measurement point；
According toObtain the potential value of remaining each measurement point, wherein, U
(xm-1) it is the m-1 potential value measuring point, xmThe point distance to earthing pole central point, x is measured for m-thm-1It it is m-1
Measure the some distance to earthing pole central point, Em-1It is the m-1 the electric field intensity measuring point, EmThe electric field of point is measured for m-th
Intensity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610346221.3A CN106053970A (en) | 2016-05-23 | 2016-05-23 | Earth electrode potential distribution measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610346221.3A CN106053970A (en) | 2016-05-23 | 2016-05-23 | Earth electrode potential distribution measurement method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106053970A true CN106053970A (en) | 2016-10-26 |
Family
ID=57174278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610346221.3A Pending CN106053970A (en) | 2016-05-23 | 2016-05-23 | Earth electrode potential distribution measurement method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106053970A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668822A (en) * | 2019-02-28 | 2019-04-23 | 国网陕西省电力公司电力科学研究院 | A kind of earthing pole nearby soil corrosivity and buried metal anti-corrosion effect appraisal procedure |
| CN111739375A (en) * | 2020-07-14 | 2020-10-02 | 云南电网有限责任公司电力科学研究院 | Ground potential distribution simulation method based on electric facility leakage environment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05172891A (en) * | 1991-12-20 | 1993-07-13 | Toyo Commun Equip Co Ltd | Detection of grounding of electric line and device therefor |
| CN101900766A (en) * | 2009-05-26 | 2010-12-01 | 上海市电力公司 | Method for determining position of voltage electrode in measurement of grounding resistance in transformer substation by short-distance method |
| CN102944771A (en) * | 2012-10-24 | 2013-02-27 | 中国电力科学研究院 | Simulation experiment device and method of alternating current, direct current and impact performance of large earth screen |
| CN104007308A (en) * | 2014-06-16 | 2014-08-27 | 重庆大学 | Grounding grid branch current detecting method based on differential method |
| CN106018943A (en) * | 2016-05-10 | 2016-10-12 | 国网四川省电力公司电力科学研究院 | Potential distribution measurement method for grounding electrode |
-
2016
- 2016-05-23 CN CN201610346221.3A patent/CN106053970A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05172891A (en) * | 1991-12-20 | 1993-07-13 | Toyo Commun Equip Co Ltd | Detection of grounding of electric line and device therefor |
| CN101900766A (en) * | 2009-05-26 | 2010-12-01 | 上海市电力公司 | Method for determining position of voltage electrode in measurement of grounding resistance in transformer substation by short-distance method |
| CN102944771A (en) * | 2012-10-24 | 2013-02-27 | 中国电力科学研究院 | Simulation experiment device and method of alternating current, direct current and impact performance of large earth screen |
| CN104007308A (en) * | 2014-06-16 | 2014-08-27 | 重庆大学 | Grounding grid branch current detecting method based on differential method |
| CN106018943A (en) * | 2016-05-10 | 2016-10-12 | 国网四川省电力公司电力科学研究院 | Potential distribution measurement method for grounding electrode |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668822A (en) * | 2019-02-28 | 2019-04-23 | 国网陕西省电力公司电力科学研究院 | A kind of earthing pole nearby soil corrosivity and buried metal anti-corrosion effect appraisal procedure |
| CN109668822B (en) * | 2019-02-28 | 2021-11-12 | 国网陕西省电力公司电力科学研究院 | Method for evaluating soil corrosivity near grounding electrode and buried metal corrosion prevention effect |
| CN111739375A (en) * | 2020-07-14 | 2020-10-02 | 云南电网有限责任公司电力科学研究院 | Ground potential distribution simulation method based on electric facility leakage environment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107219405B (en) | A kind of electric power line pole tower tower leg basis and grounding resistance of transmission test method | |
| CN101529259A (en) | Sensor, method and system of monitoring transmission lines | |
| CN102183694A (en) | Earth ground tester with remote control | |
| JP2011112652A (en) | Method of measuring earth ground resistance of pylon using single clamp | |
| CN102540127A (en) | Calibration platform for space potential detector of low-orbit spacecraft | |
| CN105182044B (en) | Using device of the Hall sensor as framework to UHVDC Arrester state-detection | |
| Lu et al. | AC conductors' corona-loss calculation and analysis in corona cage | |
| KR20100036669A (en) | Method for ground resistance measurement of transmission tower equipped with overhead groundwires | |
| CN106053970A (en) | Earth electrode potential distribution measurement method | |
| CN103995171B (en) | Contactless DC power transmission line current measuring method | |
| CN106018943B (en) | A kind of earthing pole Potential distribution measurement method | |
| Albert et al. | Geomagnetically induced currents and space weather-A review of current and future research in Austria | |
| CN109613567A (en) | A kind of grounding net of transformer substation test electrode position indicator based on Global Satellite Navigation System | |
| Guo et al. | Controlled large-scale tests of practical grounding electrodes—Part I: Test facility and measurement of site parameters | |
| CN115436270A (en) | System, method and equipment for testing corrosivity of electric grounding current | |
| CN109782071B (en) | Pole tower grounding resistance measurement method based on earth surface voltage | |
| CN104833883B (en) | A kind of earth mat method of testing based on 10 35kV short circuit groundings | |
| CN102879649A (en) | Measurement method for grounding resistance | |
| Sun et al. | Electromagnetic environment of transmission line based on full parameter online estimation | |
| Vučković et al. | Study on a standard for grounding systems realization | |
| CN112014618B (en) | Contact voltage detection device, grounding system and contact voltage detection method | |
| Smohai et al. | Auxiliary Electrode Arrangements' Effect on Earth Resistance Measurements with Fall-of-Potential Method. | |
| Bo et al. | Interference from UHVDC power line on geomagnetic observation and its correction | |
| CN110109172B (en) | Cosmic ray measuring device | |
| CN105301324B (en) | With magnetic balance theory to the method for UHVDC Arrester leakage current collection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161026 |