CN108388750A - A kind of novel radiation shape ground resistance calculating method - Google Patents
A kind of novel radiation shape ground resistance calculating method Download PDFInfo
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Abstract
The invention discloses a kind of novel radiation shape ground resistances to calculate method, it is characterised in that：Radial grounding body ground resistance calculates formulaWherein ρ is soil resistivity；H is radial grounding body buried depth；D is the equivalent diameter of single grounding body；N is grounding body quantity, and l is the length of single grounding body.It is an advantage of the invention that：Novel radiation shape ground resistance calculates method and carries out analysis calculating for radial grounding body ground resistance, is emulated according to measured value and CDEGS, and verification computational methods are feasible effectively, and more other theoretical calculation methods are more accurate, disclosure satisfy that the requirement of actual engineering design.
Description
Technical field
The method that the present invention uses data statistics, carries out analysis calculating, according to reality for radial grounding body ground resistance
Measured value and CDEGS emulation, verification computational methods are feasible effectively, and specially a kind of novel radiation shape ground resistance calculates method.
Background technology
Radial grounding body, radial earth electrode system, also known as star earthed system, by coming from identical point and radial
The plain conductor of arrangement is constituted, as shown in Figure 1.When embedded conductor total length is certain, for transient response, radiant type level connects
The more, then the initial value of impact impedance is smaller for the conductor radical of ground body, and the time for reaching steadying resistance is shorter.Radiant type is horizontal
Grounding body direct-to-ground capacitance is big, there is good impact characteristics, is grounded especially suitable for Spark gap.When radial earth mat is used for
When the work earth mat of medium wave guiding aircraft, ground resistance is smaller, earth mat power attenuation can be effectively reduced, to promote transmitter
Radiation efficiency expands navigation support distance.
Invention content
The purpose of the present invention is to provide a kind of novel radiation shape ground resistances to calculate method, is connect for radial grounding body
Ground resistance carries out analysis calculating, is emulated according to measured value and CDEGS, and verification computational methods are feasible effectively, disclosure satisfy that practical work
The requirement of journey design.
The technical solution adopted by the present invention is as follows：A kind of novel radiation shape ground resistance calculating method, it is characterised in that：Spoke
Penetrating shape grounding body ground resistance calculating formula is
Wherein ρ is soil resistivity；H is radial grounding body buried depth；D is the equivalent diameter of single grounding body；N is to connect
Ground body quantity, l are the length of single grounding body.
It is an advantage of the invention that：Novel radiation shape ground resistance calculates method and is carried out for radial grounding body ground resistance
Analysis calculates, and is emulated according to measured value and CDEGS, and verification computational methods are feasible effectively, and more other theoretical calculation methods are compared with subject to
Really, it disclosure satisfy that the requirement of actual engineering design.
Description of the drawings
Fig. 1 is the radial earthed system structural map of background technology in the present invention.
Fig. 2 is that the text of the present invention receives four-electrode method, and measuring instrumentss select 1625 electronics ground resistance meter schematic diagrames of Fluke.
Fig. 3 is the apparent soil resistivity datagram of the present invention.
Fig. 4 is the Two layer soil illustraton of model of the present invention.
Fig. 5 is the CDEGS software emulation result figures of the present invention.
Fig. 6 is the 0.618 Among Several Measuring Methods of Earth Resistance schematic diagram of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
(1) present invention is such to work and implementation, a kind of novel radiation shape ground resistance calculating method, and formula pushes away
It leads as follows：
In many reference books, it is typically in linear earthing pole earth resistance meter that radial ground network ground resistance, which calculates,
Correction factor A is introduced on the basis of calculation formula can obtain the ground resistance calculating formula of radial earthed system.
Wherein ρ is soil resistivity；L is radial grounding body total length；H is radial grounding body buried depth；D is single
The equivalent diameter of grounding body；A is form factor, value reference table 1.
The form factor A of 1 horizontal grounding pole of table
Or but the single grounding body maximum number of computational methods in these reference books is confined at 8, not to more
The radial earthed system of multi-quantity provides computational methods or computational methods and differs larger with engineering actual value.
Assuming that n is grounding body quantity, l is the length of single grounding body, then L=nl.L=nl is substituted into (formula 1)
It can obtain：
Formula 2 contains number of conductors n, can study ground resistance R and number of conductors n, conductor length l, buried depth h, line footpath d
Functional relation.With reference in the G. summers grams《Earth work books》The rapids Taro of P45 formula (9) and river《Illustrate grounding technology》P89 tables
5.9, it will be assumed that form factor A is the function of one and grounding body quantity n linear correlations, slope k1, intercept C, it is contemplated that
Influence of the conductor depth of burying to the high secondary amounts of conductor length introduces a stochastic variable ε, i.e. A=k1N+C+ ε, carry it into public affairs
Formula 2 can obtain formula 3, the K only required1, C and ε value can determine that radial grounding body ground resistance calculates formula.
(2)K1Solution.
The first, plate way；As n → ∞, it is l that radial ground connection bulk resistor, which is intended to Radius, and buried depth is the plectane of h
Grounding body, it is as follows that ground resistance calculates method：
Wherein ρ is soil resistivity, and l is single radial ground connection body length, and h is radial grounding body buried depth.
Second, ground resistance rapid design method；When the number of n is larger, radial earthed system can regard side as
The earthed system that edge is closed.It is provided according to GB 50065-2011, the Simple Calculation of compound ground network ground resistance is public in uniform soil
Formula is：
Wherein ρ is soil resistivity, and S is radial ground connection bulk area.
IEEE std 80-2000 recommend following computational methods：
Wherein ρ is soil resistivity, and S is radial ground connection bulk area, and h is grounding body buried depth, and L is grounding body total length.
The third, the method for limits new etc. is write from remote《Grounding design and engineering practice》Provide more radial ground connection
It is as follows that body ground resistance calculates method：
Wherein ρ is soil resistivity, and l is single radial ground connection body length, and h is radial grounding body buried depth, and d is to connect
Ground material diameter.
4th kind, in the G. summers gram《Earth work books》Computational methods；G. in the summer gram《Earth work books》In it is radial
It is as follows that the ground resistance of earthed system calculates formula：
Wherein ρ is soil resistivity, and l is single radial ground connection body length, and h is radial grounding body buried depth, and d is to connect
Ground material diameter, n are grounding body number.
Radial ground connection volume data is substituted into above-mentioned four kinds of methods to calculate, weighted average calculates radial ground connection
Body grounding resistance, the results are shown in Table 2.
The ground resistance calculating value of 2 distinct methods of table
Grounding resistance is predicted using cross-check technique to four groups of data of table 2.It carries out calculating each scholarly forecast first
Average value.
3 cross-check technique of table
The limit of n → ∞ is sought formula 3, k thus can be acquired1Result be 2.196.
(3) solution of C.
Wire count is bigger in radial earthed system, and the current density along conducting wire origin is obviously uneven, therefore in mathematics
It chooses the shape data that earth conductor number is 6,7,8 when statistics to use, correction value A reference tables 1.Result after data processing with
Wire count sequence is in a linear relationship.
It can be in the hope of：Result substitution in table can be obtained：
C=4.4633-2.196*7=-10.906.
(4) estimation of random disturbances amount ε.
Influence in view of the conductor depth of burying to the high secondary amounts of conductor length introduces a stochastic variable.Stochastic variable
Computational methods are as follows：
Finally acquire ε=0.418.
By k1, C, ε numerical value substitute into formula (3), therefore radial grounding body ground resistance calculate formula be
(5) measurement of soil resistivity and equivalent, be grounded place it is open in the case of, can be received using text four-electrode method into
The measurement of row apparent soil resistivity, measuring instrumentss select 1625 electronics ground resistance meters of Fluke, as shown in Figure 2：Four are measured
Electrode squeezes into that tested soil is inline, and it is b to bury people's depth, and linear interval is a, and test electric current I flows into two electricity of outside
Pole is flowed, and the potential difference of two voltage interpolar of inside is V, electronics ground resistance meter can directly display the resistance result R (V/I) measured.
According to radial earthed system structure during actual test, for interpolar away from should be greater than 40 meters, electrode depth is 0.2 meter.
Apparent soil resistivity computational methods are as follows：
Using the RESAP modules (soil model processing) in CDEGS softwares, measurement result is inputted into RESAP modules, such as
Shown in Fig. 3.Soil types selects horizontal soil, and soil layering selection is self-defined, and the results are shown in Figure 4 for display after operation：
The soil is equivalent to become two layers of horizontal soil model, 40.70 Ω m of upper layer of soil resistivity, 2.39 meters of depth of soil, lower layer
14.19 Ω m of soil resistivity, depth of soil are infinite.
Using same measurement method, data processing is carried out using CDEGS softwares, the upper layer of soil resistivity at another place is
70.12 Ω m, depth of soil are 1.56 meters, 28.46 Ω m of lower soil resistivity, and depth of soil is infinite.
(6) CDEGS software emulations；Using the SESGSE estimation programs in CDEGS softwares, the radiation in horizontal electrode is selected
Shape arranges horizontal conductor, and by soil resistivity, wire radius, conductor depth, conductor length, the parameters such as number of conductor input, most
Occurs operation result eventually, as shown in Figure 5.
The engineering survey of ground resistance, for being connect with the radial earthed system that ground wire is constituted by 18 ground wires and 36
Ground resistance measures, it is contemplated that the structure of both radial earthed systems surveys radial earthed system using 0.618 method
Amount, interpolar away from a be not less than earthed system cornerwise 2/3 or more, ground resistance measurement method as shown in fig. 6, measurement result such as
Shown in table 5.
The radial Resistance of Grounding Grids test value of 5 two kinds of specifications of table
(7) analysis is compared.
1. with the comparison of simulation result, radial earthed system structural parameters reference table 5 uses CDEGS softwares and a variety of
Theoretical calculation method obtains as a result, resultant error analysis is more as shown in table 6.
Table 6CDEGS simulation result comparison sheets
Note：Error analysis is using CDEGS simulation results as reference standard.By table 6 as it can be seen that calculation formula proposed by the present invention is removed
It is other than more weaker than method of limits effect, better than other methods in remaining table in 18 root architecture.
2. the comparison with measured result, radial earthed system structural parameters reference table 5 use 1625 electronics of Fluke
Ground resistance meter is measured using 0.618 method, and measurement result and various theoretical checkout results compare as shown in table 7.
7 measured result comparison sheet of table
Note：Error analysis is using engineering measurement as reference standard.By table 7 as it can be seen that calculation formula proposed in this paper is in 18 root knots
It is better than other methods when structure and in 36 root architectures.By comparing analysis, radial earthed system ground resistance proposed in this paper
Calculation formula passes through CDEGS simulating, verifyings and engineering field survey, and more other theoretical calculation methods are more accurate, disclosure satisfy that
The requirement of actual engineering design.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (2)
1. a kind of novel radiation shape ground resistance calculates method, it is characterised in that：Radial grounding body ground resistance calculates formula
For
Wherein ρ is soil resistivity；H is radial grounding body buried depth；D is the equivalent diameter of single grounding body；N is grounding body
Quantity, l are the length of single grounding body.
2. a kind of novel radiation shape ground resistance according to claim 1 calculates method, it is characterised in that：It is specific to derive
For：Correction factor A is introduced on the basis of linear earthing pole ground resistance calculates formula can obtain radial earthed system
Ground resistance calculate formula：
（Formula 1）
Wherein ρ is soil resistivity；L is radial grounding body total length；H is radial grounding body buried depth；D is single grounding body
Equivalent diameter；A is form factor；
Assuming that n is grounding body quantity, l is the length of single grounding body, then L=nl；L=nl is substituted into（Formula 1）It can obtain：
（Formula 2）
Assuming that form factor A is the function of one and grounding body quantity n linear correlations, slope k1, intercept C, it is contemplated that conductor
Influence of the depth of burying to the high secondary amounts of conductor length introduces a stochastic variable ε, i.e. A=k1N+C+ ε, carrying it into formula 2 can
Obtain formula 3, the K only required1, C and ε value can determine that radial grounding body ground resistance calculates formula；
（Formula 3）
K1Solution；The limit of n → ∞ is sought formula 3, k thus can be acquired1Result be 2.196；
The solution of C；Data processed result and wire count sequence are in a linear relationship, can be in the hope of：；Substitution can
：
C=4.4633-2.196*7=- 10.906；
The estimation of random disturbances amount ε；Influence of the conductor depth of burying to the high secondary amounts of conductor length introduces a stochastic variable, with
The computational methods of machine variable are as follows：
（Formula 9）
Finally acquire ε=0.418；
By k1, C, ε numerical value substitute into formula（3）To obtain the final product.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109782110A (en) * | 2019-02-19 | 2019-05-21 | 深圳崇达多层线路板有限公司 | A kind of detection line girth sheets whether Duan Lu test method |
| CN111025024A (en) * | 2019-12-20 | 2020-04-17 | 三峡大学 | Method and device for measuring grounding impedance of transformer substation grounding grid based on actual measurement and simulation |
| CN111077350A (en) * | 2019-12-16 | 2020-04-28 | 云南电网有限责任公司西双版纳供电局 | Galvanized electrode system for pole tower grounding state test and detection method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900764A (en) * | 2009-05-26 | 2010-12-01 | 上海市电力公司 | Method for measuring grounded resistance of grounded screen by short range measuring method |
| CN102509242A (en) * | 2011-10-20 | 2012-06-20 | 四川诺特科技有限公司 | RFID (radio frequency identification) technology based non-metallic ion grounding body management method and system |
| JP5269055B2 (en) * | 2010-12-21 | 2013-08-21 | 中国電力株式会社 | Articulated grounding design support system |
| CN103326139A (en) * | 2013-06-08 | 2013-09-25 | 三峡大学 | Hollow aluminum alloy tube grounding device capable of being assembled |
| CN105069202A (en) * | 2015-07-22 | 2015-11-18 | 国网天津市电力公司 | Intelligent laying design method of substation grounding grid |
-
2018
- 2018-03-17 CN CN201810221448.4A patent/CN108388750B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900764A (en) * | 2009-05-26 | 2010-12-01 | 上海市电力公司 | Method for measuring grounded resistance of grounded screen by short range measuring method |
| JP5269055B2 (en) * | 2010-12-21 | 2013-08-21 | 中国電力株式会社 | Articulated grounding design support system |
| CN102509242A (en) * | 2011-10-20 | 2012-06-20 | 四川诺特科技有限公司 | RFID (radio frequency identification) technology based non-metallic ion grounding body management method and system |
| CN103326139A (en) * | 2013-06-08 | 2013-09-25 | 三峡大学 | Hollow aluminum alloy tube grounding device capable of being assembled |
| CN105069202A (en) * | 2015-07-22 | 2015-11-18 | 国网天津市电力公司 | Intelligent laying design method of substation grounding grid |
Non-Patent Citations (1)
| Title |
|---|
| 杜思深等: "避雷针接闪对通信台站布线及接地系统影响分析", 《空军工程大学学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109782110A (en) * | 2019-02-19 | 2019-05-21 | 深圳崇达多层线路板有限公司 | A kind of detection line girth sheets whether Duan Lu test method |
| CN111077350A (en) * | 2019-12-16 | 2020-04-28 | 云南电网有限责任公司西双版纳供电局 | Galvanized electrode system for pole tower grounding state test and detection method |
| CN111077350B (en) * | 2019-12-16 | 2021-09-28 | 云南电网有限责任公司西双版纳供电局 | Galvanized electrode system for pole tower grounding state test and detection method |
| CN111025024A (en) * | 2019-12-20 | 2020-04-17 | 三峡大学 | Method and device for measuring grounding impedance of transformer substation grounding grid based on actual measurement and simulation |
| CN111025024B (en) * | 2019-12-20 | 2021-09-28 | 三峡大学 | Method and device for measuring grounding impedance of transformer substation grounding grid based on actual measurement and simulation |
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