CN108008198B - It is a kind of meter and earth mat temperature impulse earthed resistance measurement method - Google Patents
It is a kind of meter and earth mat temperature impulse earthed resistance measurement method Download PDFInfo
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- CN108008198B CN108008198B CN201711252173.2A CN201711252173A CN108008198B CN 108008198 B CN108008198 B CN 108008198B CN 201711252173 A CN201711252173 A CN 201711252173A CN 108008198 B CN108008198 B CN 108008198B
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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
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
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Abstract
The present invention provide it is a kind of meter and earth mat temperature impulse earthed resistance measurement method, 1) each step of this method, which is respectively as follows:, builds shaft tower earth mat Research on Automatic Measuring System of Temperature according to field conditions, 2) reconnaissance detects tested grounded screen ambient temperature distribution situation, 3) data of each measurement point are calculated to whole impulse earthed resistance weighing factor, 4) according to test point temperature data, shaft tower earth mat is calculated and is considering earth mat temperature Ground shock waves ground resistance.The present invention according to actual condition, can limited the case where meter and earth mat temperature Ground shock waves ground resistance accurately is calculated, shaft tower route operating status when by being struck by lightning can effectively be judged by the calculating to impulse earthed resistance；Test platform is easy to arrange, is simple and effective, is suitable for various operating conditions.
Description
Technical field
The present invention relates to electric system lightning protection and ground connection field, more particularly, to the impact of a kind of meter and earth mat temperature
Ground resistance measurement method.
Background technique
The safe operation of shaft tower and its lightning protection characteristic relation are close in transmission system, and its lightning protection effect will be directly by it
The impact characteristics of earthing or grounding means influence.During being struck by lightning shaft tower, lightning current is spilt into ground by shaft tower and its earthing or grounding means, and
In this transient process, a certain size voltage drop must be formed on impulse earthed resistance.If this voltage is greater than transmission line of electricity electricity
Pressure, hits back to route, seriously threatens power plant and substation equipment, and will increase line tripping rate, influences electrical stability.
Thus, reducing impulse earthed resistance to a certain extent is a current domestic and international great research topic and a great problem.
It is existing the study found that the variation of grounded screen and its neighbouring temperature has directly system earth impulse earthed resistance
Influence.It, can be preferably in different weather, varying environment if dynamic grasps impulse earthed resistance value when temperature change
Lower optimization earthing or grounding means in time, reduces the incidence of counterattack accident.The present invention can promote power grid efficiently to construct, and promote intelligence electricity
Net fast construction, while the present invention monitors shaft tower ambient temperature in real time, can be realized real-time place to data close to intelligent monitoring
Reason, and a large number of experiments, emulation and corresponding theory deduction obtain relevant calculation method and calculation formula before, it can be quasi-
Impulse earthed resistance is really calculated in real time, provides necessary data and reliable for further protection configuration and drop resistance research
Reference.
Summary of the invention
The present invention provides a kind of real-time accurately impulse earthed resistance measurement method of meter and earth mat temperature.
In order to reach above-mentioned technical effect, technical scheme is as follows:
It is a kind of meter and earth mat temperature impulse earthed resistance measurement method, comprising the following steps:
S1: live pilot investigation；
S2: it chooses measurement point and assembles combined experimental device；
S3: the region division and weight distribution of measurement point；
S4: signal processor carries out parameters revision；
S5: impulse earthed resistance is calculated.
Further, the process of the step S1 is:
Grounded screen related physical quantity is measured, measuring shaft tower, nearby soil resistivity is ρ, and grounded screen sectional area is
S1, the rectangular area that four side of grounded screen surrounds is S2, grounded screen buried depth is H, and grounded screen longest edge lengths are L1And thunder and lightning punching
Hitting electric current is Im。
Further, the process of the step S2 is:
Nine measurement points are taken in entire grounded screen, wherein four angles of grounded screen are chosen for 1 respectively, and 2,3,4 points；In grounded screen
Lower section is chosen at 5,6 points；Grounded screen right and left is chosen at 7,8 points；Center is chosen at 9 points, and temperature sensor is placed horizontally at
0.8H under soil, each sensor measurement corresponding temperature are passed to temperature acquisition mould by signal transmssion line after signal acquisition
Block carries out Macro or mass analysis in the device, can respectively obtain the real time temperature x of nine pointsi, wherein i=0,1,9,
For temperature collecting module by coaxial cable by each temperature input signal analysis processor, signal processor passes through coaxial electrical again
Cable is connected to terminal upper computer.
Further, the process of the step S3 is:
The temperature performance and change in resistance of measurement point 1,2,3,4 are considered as identical in allowable range of error；Measurement point 5,
6 be considered as in allowable range of error it is identical；Measurement point 7,8 is considered as identical；9 points are solely a measurement point；1,2,3,4 points account for entirety jointly
Resistance weight are as follows:
5,6 points of shared weights jointly are as follows:
7,8 points of shared weights jointly are as follows:
Weight shared by 9 points are as follows:
w4=-1.826*S2 0.196+log(S2+S2 0.5+6.704)。
Further, the process of the step S4 is:
The correction factor of lightning current is calculated are as follows:
Grounded screen Area modificatory coefficient are as follows:
Soil resistivity correction factor are as follows:
Further, the process of the step S5 is:
It enables:
Then impulse earthed resistance are as follows:
Compared with prior art, the beneficial effect of technical solution of the present invention is:
The present invention discloses the impulse earthed resistance measurement method of a kind of meter and earth mat temperature, and each step of this method is respectively as follows:
1) build shaft tower earth mat Research on Automatic Measuring System of Temperature according to field conditions, 2) reconnaissance detects tested grounded screen ambient temperature distribution situation,
3) data of each measurement point are calculated to whole impulse earthed resistance weighing factor, 4) according to test point temperature data, meter
Calculation obtains shaft tower earth mat and is considering earth mat temperature Ground shock waves ground resistance.The present invention, being capable of limited accurate meter according to actual condition
Calculation is counted and the case where earth mat temperature Ground shock waves ground resistance, can effectively judge shaft tower by the calculating to impulse earthed resistance
Route operating status when by being struck by lightning；Test platform is easy to arrange, is simple and effective, is suitable for various operating conditions.
Detailed description of the invention
Fig. 1 is the method for the present invention flow chart；
Fig. 2 is earth mat information and moisture measurement point distribution map in the present invention；
Fig. 3 is the method for the present invention system mounted.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
In order to better illustrate this embodiment, the certain components of attached drawing have omission, zoom in or out, and do not represent actual product
Size；
To those skilled in the art, it is to be understood that certain known features and its explanation, which may be omitted, in attached drawing
's.
The following further describes the technical solution of the present invention with reference to the accompanying drawings and examples.
Embodiment 1
As shown in Figure 1, the impulse earthed resistance measurement method of a kind of meter and earth mat temperature, comprising the following steps:
Step 1: live pilot investigation
It is H=0.8m, grounded screen longest edge lengths L that grounded screen, which is chosen, away from ground depth1For 20m, grounded screen sectional area S1For
25*πmm2The rectangular area S that four side of grounded screen surrounds2For 100m2, lightning impulse current ImFor 70kA region as test section
Domain, the regional soil resistivity are that ρ is 150 (Ω .m-1)。
Step 2: choosing measurement point and assembling combined experimental device
Nine measurement points are taken in entire grounded screen, wherein four angles of grounded screen are chosen for 1 respectively, and 2,3,4 points；In grounded screen
Lower section is chosen at 5,6 points；Grounded screen right and left is chosen at 7,8 points；Center is chosen at 9 points.Temperature sensor is placed horizontally at
Under soil under 0.8H, each sensor measurement corresponding temperature is passed to temperature acquisition by signal transmssion line after signal acquisition
Module 10 carries out Macro or mass analysis in the device, can respectively obtain the real-time temperature values of nine points, respectively x1=30 DEG C, x2=
32 DEG C, x3=31 DEG C, x4=31 DEG C, x5=30 DEG C, x6=31 DEG C, x7=30 DEG C, x8=32 DEG C, x9=31 DEG C, temperature acquisition mould
By coaxial cable 13 by each temperature input signal analysis processor 11, signal processor passes through coaxial cable 14 again and connects block
It is connected to terminal upper computer.
Step 3: the region division and weight distribution of measurement point
The temperature performance and change in resistance of measurement point 1,2,3,4 can be considered identical in allowable range of error；Measurement point
5,6 can be considered identical in allowable range of error；Measurement point 7,8 can be considered identical in allowable range of error；9 points are solely a measurement
Point.
1,2,3,4 points account for overall electrical resistance weight jointly are as follows:
5,6 points of shared weights jointly are as follows:
7,8 points of shared weights jointly are as follows:
Weight shared by 9 points are as follows:
w4=-1.826*S2 0.196+log(S2+S2 0.5+6.704)；
Step 4: signal processor carries out parameters revision
The correction factor of lightning current are as follows:
Grounded screen Area modificatory coefficient are as follows:
Soil resistivity correction factor are as follows:
Step 5: impulse earthed resistance is calculated
According to the data for obtaining needs in host computer: k1, k2, k3, the temperature value (T of each measurement point1=30 DEG C, T2=32
DEG C, T3=31 DEG C, T4=31 DEG C, T5=30 DEG C, T6=31 DEG C, T7=30 DEG C, T8=32 DEG C, T9=31 DEG C) and four regions
Weight w1, w2, w3, w4,
According to the following formula:
Impulse earthed resistance R is calculatedch=10.569 Ω.
The same or similar label correspond to the same or similar components；
Described in attached drawing positional relationship for only for illustration, should not be understood as the limitation to this patent；
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (3)
1. the impulse earthed resistance measurement method of a kind of meter and earth mat temperature, which comprises the following steps:
S1: live pilot investigation；
S2: it chooses measurement point and assembles combined experimental device；
S3: the region division and weight distribution of measurement point；
S4: signal processor carries out parameters revision；
S5: impulse earthed resistance is calculated；
The process of the step S1 is: grounded screen related physical quantity measured, measuring shaft tower, nearby soil resistivity is ρ,
Grounded screen sectional area is S1, the rectangular area that four side of grounded screen surrounds is S2, grounded screen buried depth is H, and grounded screen longest edge lengths are
L1And lightning impulse current is Im；
The process of the step S2 is: nine measurement points are taken in entire grounded screen, wherein four angles of grounded screen are chosen for 1 respectively,
2,3,4 points；Grounded screen upper and lower is chosen for 5, and 6 points；Grounded screen right and left is chosen for 7, and 8 points；Center is chosen at 9 points, and temperature passes
Sensor is placed horizontally at the 0.8H under soil, each sensor measurement corresponding temperature, passes through signal after signal acquisition and transmits
Line is passed to temperature collecting module, carries out Macro or mass analysis in the device, can respectively obtain the real time temperature x of nine pointsi, wherein i
=1,9, temperature collecting module by coaxial cable by each temperature input signal analysis processor, at signal
Reason device passes through coaxial cable again and is connected to terminal upper computer；
The process of the step S3 is: the temperature performance and change in resistance of measurement point 1,2,3,4 in allowable range of error, depending on
It is identical；Measurement point 5,6 is considered as identical in allowable range of error；Measurement point 7,8 is considered as identical；9 points are solely a measurement point；1,2,
3,4 points account for overall electrical resistance weight jointly are as follows:
5,6 points of shared weights jointly are as follows:
7,8 points of shared weights jointly are as follows:
Weight shared by 9 points are as follows:
w4=-1.826*S2 0.196+log(S2+S2 0.5+6.704)。
2. the impulse earthed resistance measurement method of meter according to claim 1 and earth mat temperature, which is characterized in that the step
The process of rapid S4 is:
The correction factor of lightning current is calculated are as follows:
Grounded screen Area modificatory coefficient are as follows:
Soil resistivity correction factor are as follows:
3. the impulse earthed resistance measurement method of meter according to claim 2 and earth mat temperature, which is characterized in that the step
The process of rapid S5 is:
It enables:
Then impulse earthed resistance are as follows:
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| CN108872709B (en) * | 2018-08-13 | 2019-07-12 | 西南交通大学 | A kind of different moisture content lower leaf soil dynamic electric resistor characteristic test method |
| CN109187653B (en) * | 2018-08-13 | 2019-07-12 | 西南交通大学 | The Horizontal Layer Soil dynamic electric resistor characteristic test method of meter and different temperatures |
| CN109188090B (en) * | 2018-08-13 | 2019-11-05 | 西南交通大学 | The nonlinear test method of different humidity electric resistance of soil in vertical demixing soil |
| CN109188092B (en) * | 2018-08-13 | 2019-09-06 | 西南交通大学 | Soil dynamic resistance characteristic test method under a kind of different temperatures |
| CN109188088B (en) * | 2018-08-13 | 2019-11-05 | 西南交通大学 | A kind of vertical demixing electric resistance of soil nonlinear characteristic test method |
| CN118095670A (en) * | 2024-04-29 | 2024-05-28 | 广东电网有限责任公司中山供电局 | Multi-parameter sensing detection system and device for buried ground of transformer substation grounding grid |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1719245A (en) * | 2005-08-02 | 2006-01-11 | 中国农业大学 | Method and sensor for synchronous real time measuring water content and conductivity of soil |
| US7239156B1 (en) * | 2006-07-13 | 2007-07-03 | Pepperl & Fuchs, Inc. | Configurable corrosion measurement field device |
| CN106096225A (en) * | 2016-05-27 | 2016-11-09 | 三峡大学 | The power station of a kind of karst area geomorphic feature or the preparation method of grounding net of transformer substation resistance value |
| EP3078938A3 (en) * | 2015-04-07 | 2016-11-16 | LIOS Technology GmbH | Method and a device for monitoring an undersea cable |
| CN107064645A (en) * | 2017-04-24 | 2017-08-18 | 南方电网科学研究院有限责任公司 | Measuring system and method for corresponding relation between soil resistivity and temperature |
| CN107389737A (en) * | 2017-07-04 | 2017-11-24 | 北京林业大学 | A kind of soil parameters measurement apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007022039B4 (en) * | 2007-05-08 | 2009-07-09 | Hochschule Mannheim | sensor arrangement |
-
2017
- 2017-12-01 CN CN201711252173.2A patent/CN108008198B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1719245A (en) * | 2005-08-02 | 2006-01-11 | 中国农业大学 | Method and sensor for synchronous real time measuring water content and conductivity of soil |
| US7239156B1 (en) * | 2006-07-13 | 2007-07-03 | Pepperl & Fuchs, Inc. | Configurable corrosion measurement field device |
| EP3078938A3 (en) * | 2015-04-07 | 2016-11-16 | LIOS Technology GmbH | Method and a device for monitoring an undersea cable |
| CN106096225A (en) * | 2016-05-27 | 2016-11-09 | 三峡大学 | The power station of a kind of karst area geomorphic feature or the preparation method of grounding net of transformer substation resistance value |
| CN107064645A (en) * | 2017-04-24 | 2017-08-18 | 南方电网科学研究院有限责任公司 | Measuring system and method for corresponding relation between soil resistivity and temperature |
| CN107389737A (en) * | 2017-07-04 | 2017-11-24 | 北京林业大学 | A kind of soil parameters measurement apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 输电线路杆塔接地装置的冲击接地电阻计算公式;陈先禄 等;《电网技术》;19960630;第9-10页 * |
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