CN106707066A - Standard real-model earthing test device - Google Patents

Standard real-model earthing test device Download PDF

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Publication number
CN106707066A
CN106707066A CN201710040767.0A CN201710040767A CN106707066A CN 106707066 A CN106707066 A CN 106707066A CN 201710040767 A CN201710040767 A CN 201710040767A CN 106707066 A CN106707066 A CN 106707066A
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CN
China
Prior art keywords
earthing
test apparatus
ground
true type
type grounding
Prior art date
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Granted
Application number
CN201710040767.0A
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Chinese (zh)
Other versions
CN106707066B (en
Inventor
郭磊
寇晓适
张科
董曼玲
丁国君
王天
王伟
赵磊
李予全
郑含博
邵颖彪
王栋
付海金
蒲兵舰
辛伟峰
王吉
王震宇
马德英
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Henan Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Henan Electric Power Co Ltd
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Application filed by State Grid Corp of China SGCC, Electric Power Research Institute of State Grid Henan Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201710040767.0A priority Critical patent/CN106707066B/en
Publication of CN106707066A publication Critical patent/CN106707066A/en
Application granted granted Critical
Publication of CN106707066B publication Critical patent/CN106707066B/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements 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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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

The present invention discloses a standard real-model earthing test device. The standard real-model earthing test device comprises a floor tile layer and a soil layer; the floor tile layer and the soil layer are attached to each other along a vertical direction; an earthing grid, a plurality of earthing downleads for connecting ground surface electrical devices, a plurality of air switches and a plurality of underground earthing conductors are arranged in the soil layer; the air switches are connected in series with the earthing grid through the underground earthing conductors; and the earthing downleads of the ground surface electrical devices are directly connected with the earthing grid. According to the standard real-model earthing test device of the invention, the earthing grid is manually laid in the soil layer, floor tiles for the blind tracks of a road are laid on the soil layer, and the real-model earthing test device can be constructed, and therefore, different earthing device performance parameter test equipment can be adopted to perform measurement and comparison through a field actual measurement mode; and various kinds of conditions such as resistance increase of the underground earthing conductors due to corrosion or the fracture of the underground earthing conductors due to corrosion can be simulated, and various kinds of real defect conditions can be also simulated simultaneously. The standard real-model earthing test device of the invention is used for teaching training or experimental verification, or the like, has high practicability and high popularization Value.

Description

A kind of true type grounding test apparatus of standard
Technical field
Connect the present invention relates to power system earthing or grounding means performance parameter field of measuring technique, more particularly to a kind of true type of standard Ground experimental rig.
Background technology
The unit type for being presently used for measuring power system earthing or grounding means performance parameter is numerous, measures earthing or grounding means performance The accuracy and operability of parameter are uneven, in the selection in face of a variety of earthing or grounding means performance parameter test equipment When, power test staff often by conventional experiment experience or slave unit producer or other user there directly or Understand indirectly, there is one-sidedness, good and bad to equipment performance screens without enough convincingnesses;Sometimes certain earthing or grounding means performance Test data is good in the lab for parametric test equipment, but can not be measured exactly when surveying at the scene.More than Situation can not authentic and validly reflect the accuracy and operability of earthing or grounding means performance parameter test equipment.Additionally, having When need to carry out the experiment of some grounded screens, generally require to find operation in power system that the time limit is remote, Grounding Grid destruction And than more serious transformer station, consuming great effort and due to the corrosion failure degree to grounding net of transformer substation do not know about(Need Excavate in large quantities and check, waste time and energy), cause experiment some of measurement data cannot exactly with the actual conditions phase of earth mat Association.
The content of the invention
It is an object of the invention to provide a kind of true type grounding test apparatus of standard, can detect that earthing or grounding means performance parameter is surveyed Measuring appratus performance is good and bad and simulates a variety of grounding net defects, is easy to carry out experiment measurement exactly.
The technical solution adopted by the present invention is:
A kind of true type grounding test apparatus of standard, including ground brick layer and dirt bed, the two is upper and lower to be close to set, the dirt bed In be provided with grounded screen, multiple down conductor for connecting earth's surface power equipment, multiple air switches and multiple ground and connect Earthed conductor, described air switch is connected in series by earth conductor in ground and grounded screen, earth's surface power equipment down conductor Directly it is connected with grounded screen;
Described grounded screen is flushed ground wire by telluric water and the flat sideline of telluric water is constituted, and the flat sideline of described telluric water sets for closed loop Put, and outward flange is arc chord angle setting;The telluric water flushes ground wire a plurality of, and every telluric water flushes ground wire two ends difference It is fixedly connected with the flat sideline of telluric water, and a plurality of telluric water flushes interaction setting between ground wire, constitutes multiple interaction points;
Flushed in any one telluric water and be provided with a contact point, the contact point on ground wire between any two interaction point Include cement solidification well and be correspondingly arranged in two ground of well Inner earth conductor and be arranged on one air switch in well top, Earth conductor is set with cement solidification well gap in the ground, and air switch two ends are respectively by earth conductor in two ground and connection Telluric water where network point flushes ground wire and is in series.
Described also includes a true type grounding test apparatus nameplate of standard, the true type grounding test apparatus of described standard Nameplate is arranged on grounded screen outside, and the right of each contact point in grounded screen is portrayed on the true type grounding test apparatus nameplate of standard Answer position.
The contact point is disposed with numbering, and the display of numbering correspondence and the true type grounding test apparatus nameplate of standard On.
Rain-repellent cover is also included, the rain-repellent cover is located at the outside of air switch, and rain-repellent cover bottom Portion is as dirt bed.
Observation window is provided with described rain-repellent cover.
Described this body section of grounded screen is band iron, and meets the calculating of system heat-stable calibration.
Anticorrosive coat and anti oxidation layer are provided with described grounded screen body.
The bottom of the cement solidification well is provided with multiple osculums.
Described telluric water flushes ground wire laying depth and cannot be less than 0.8m.
The present invention by by the artificial laying grounded screen in dirt bed, the laying road sidewalk for visually impaired people floor tile on dirt bed, It is built into true type grounding test apparatus such that it is able to by way of field measurement, is joined using different earthing or grounding means performances Number test equipment measures comparison;It is further to control the logical of each branch road in grounded screen using air switch in grounded screen It is disconnected, so as to simulate a variety of grounding net defects, artificially manufacture N number of different Grounding breakpoint(Can be by series connection Connection status is cut-off in big resistance or air switch change), can simulate earth conductor in ground exist corrosion cause resistance become it is big or Person is directly become rusty the various situations such as disconnected, under different defect conditions, with different standard ground impedance values and grounding resistance. The true type grounding test apparatus use safe and convenient, can easily and reliably realize to different earthing or grounding means performance parameter tests The accurate measurement of equipment, it is good and bad with the performance for efficiently differentiating different earthing or grounding means performance parameter test equipment, and can be same When simulate various real defect situations, it is practical for training and teaching or verification experimental verification etc., with larger popularization and application Value.
Brief description of the drawings
Fig. 1 is principle schematic diagram. of the invention;
Fig. 2 is contact point structure chart of the present invention;
Fig. 3 is present invention middle part earth conductor and surrounding earth conductor off-state;
Fig. 4 is the experimental state figure that corner connection earthed conductor of the invention disconnects with surrounding earth conductor.
In figure:1st, brick layer, 2, dirt bed, 3, grounded screen, 4, interaction point, 5, air switch, 6, rain-repellent cover, 7, Middle earth conductor, 8, landscape apparatus down conductor, 9, the flat sideline of telluric water, 10, the true type grounding test apparatus nameplate of standard, 11st, telluric water flushes ground wire, and 12, cement solidification well, 13, osculum.
Specific embodiment
As shown in Figure 1,2 and 3, the present invention includes ground brick layer 1 and dirt bed 2, and the two is upper and lower to be close to set, the soil Grounded screen 3, multiple landscape apparatus down conductor 8, multiple air for connecting electrical equipment grounded part are provided with layer 2 Earth conductor 7 in switch 5 and multiple ground, described air switch 5 is connected in series by earth conductor 7 in ground with grounded screen 3, ground Table equipment ground downlead 8 is directly connected with grounded screen 3;
Described grounded screen 3 is flushed ground wire 9 by telluric water and the flat sideline 11 of telluric water is constituted, and the flat sideline 11 of described telluric water is Closed ring set, and outward flange is arc chord angle setting;The telluric water flushes ground wire 9 a plurality of, and every telluric water flushes ground wire Interaction is set between two ends are fixedly connected with the flat sideline 11 of telluric water respectively, and a plurality of telluric water flushes ground wire 9, is constituted at interaction Multiple interaction points 4;
Flushed in any one telluric water and be provided with a contact point, the contact on ground wire 9 between any two interaction point Point includes cement solidification well 12 and is correspondingly arranged in two ground of well Inner earth conductor 7 and is arranged on one air in well top Switch 5, earth conductor 7 is set with the gap of cement solidification well 12 in the ground, and the two ends of the air switch 5 pass through two ground respectively Middle earth conductor 7 flushes 9 lines of ground and is in series with the telluric water where contact point;Earth conductor 7 is apart from cement solidification well 12 in ground Bottom should maintain a certain distance(About 30cm), it is to avoid earth conductor 7 directly contacts cement solidification bottom and may deposit in ground Ponding, cement solidification bottom should have some osculums 13, to exclude the ponding that seeped water in well, it is to avoid ponding causes two ground The short circuit of middle earth conductor 7, earth conductor 7 is each other by air insulation in two ground, and extends perpendicularly to ground brick layer 1.
Rain-repellent cover 6 is also included, the rain-repellent cover 6 is located at the outside of air switch, and rain-repellent cover 6 Bottom is as dirt bed.Observation window is provided with described rain-repellent cover 6.Described contact point is by being embedded in the sky of earth's surface Air cock 5 disconnects the branch road that the telluric water flushes ground wire.Telluric water flushes ground wire and disconnects and draw respectively in the position of contact point Go out earth conductor 7 in two sections of ground and reach earth's surface, earth conductor 7 is embedded in dirt bed 2 in ground, extend perpendicularly to ground brick layer 1, it is empty Earth conductor 7 is connected to control folding during air cock 5 flushes two sections of ground of ground wire branch road with the telluric water, and air switch 5 is whole Body is placed in rain-repellent cover 6, slightly above the brick layer 1 of rain-repellent cover 6, and the latter half is placed within ground brick layer 1, rain-repellent Cover 6 uses plastics or stainless steel materials, is completely enclosed when air switch 5 is covered in waterproof and dampproof, makes air switch 5 from outer Boundary corrodes, and rain-repellent cover 6 carries observation window, is easy to observe the state of air switch 5.Air switch 5 is integrally placed at transparent anti- In canopy 6, rain-repellent cover 6 should be easy to open, and be easy to observation, and waterproof and dampproof property is good.Air switch 5 should meet ground connection dress Heat-stable entertoxin condition, convenient operation are put, and contact is good, the feelings of dynamic/static contact loose contact or divide-shut brake clamping stagnation should not occurs Condition.
Described also includes a true type grounding test apparatus nameplate 10 of standard, the true type test for ground dress of described standard Put nameplate 10 and be arranged on grounded screen outside, and each contact in grounded screen has been portrayed on the true type grounding test apparatus nameplate 10 of standard The correspondence position of point.The contact point is disposed with numbering, and the display of numbering correspondence and the true type grounding test apparatus of standard On nameplate 10.The true type grounding test apparatus nameplate 10 of the described standard must be filled strictly with the actual true type test for ground of standard Put position proportional distribution to be consistent, the numbering of contact point in the numbering and the present invention of all contact points shown on nameplate 10 It is consistent, scientific and precise and is easy to the test situation of the record various earthing or grounding means real defects of simulation.By to contact point Setting can realize that this any control refers to testing crew for difference to the arbitrarily control of the true type grounding test apparatus of standard Earthing or grounding means test simulation demand manually cut-off air switch 5 in contact point, make it possible to reach under trystate The true type grounding test apparatus middle part earth conductor of standard is with surrounding earth conductor off-state as shown in figure 3, or trystate The lower true corner connection earthed conductor of type grounding test apparatus one of standard is as shown in Figure 4 with surrounding earth conductor off-state.Reliability is easily Realize the real defect feelings of the accurate measurement and the various earthing or grounding means of simulation to different earthing or grounding means performance parameter test equipment Condition.
As shown in figure 1, the present invention calculates design impedance ground value and grounding resistance by accurate, to different ground connection Device performance parameters test equipment measures comparison;The device can also set different Grounding breakpoints, can simulate Earth conductor has corrosion in ground causes resistance to become big or the various situations such as disconnected of directly becoming rusty, and meets the true feelings of earthing or grounding means Condition.
The present invention is designed in design and construction technique according to the 110kV substation grounding devices of standard, and earth's surface sets For down conductor, air switch 5 and in ground, earth conductor 7 sets according to the band iron section for meeting the calculating of system heat-stable calibration Meter, telluric water flushes ground wire laying depth and cannot be less than 0.8m, and ground wire lays sidewalk for visually impaired people floor tile on the ground.In each equipment Area sets excavation and checks indicating positions.Grounded screen outer rim should be closed, and it is external that each angle of outer rim should do grounded screen sheet in the arc-shaped, described It is provided with anticorrosive coat and anti oxidation layer, you can with galvanizing or painting KV anticorrosive paints.
During use of the present invention, the down conductor of live primary equipment must not be connected toward cable duct counterpoise grounding, also not Preferably vacantly pass through cable duct.All tie points of down conductor and major network must not use spot welding or bolt connection.Band steel joint welding Length should be not less than the twice of its width and the welding of three faces;The joint welding length of round steel should be not less than 50mm, must not there is rosin joint, dry joint Phenomenon, all pads all should be through the first brush antirust paint pitching again of preservative treatment.After earth mat is carried out in standing, by the grounding lead of equipment Offline reliably to weld together with earth mat, the connection of down conductor and electrical equipment can be connected with or weld, and use spiral shell Tethering should set jam nut or check washer when connecing.To transformer neutral point, oil-filled equipment and lightning protection in station, to carry out " double ground connection ", and be connected with two differences of earth mat, every down conductor all should meet heat-staple requirement.Electrically set Standby each grounded part should be connected with single down conductor with earth mat backbone, forbid to be gone here and there in a down conductor Connect several parts for needing and being grounded.The debris such as backfill fine earth, and compaction in layers, not handy rubble are backfilled, and do not allow to use Mordant industrial residue backfill, to ensure that ground connection is good.
1)It is good and bad that the present apparatus can apply to detection earthing or grounding means performance parameter measuring instrument performance.The device is by accurate Calculating and design by taking 110kV grounding net of transformer substation as an example, in without ground under the influence of stray electrical current, impedance ground value and ground connection Resistance value may be designed as 0.5 Ω), by manually laying, true type grounding test apparatus are built into, with can be by scene The mode of actual measurement, comparison is measured using different earthing or grounding means performance parameter test equipment.The true type grounding test apparatus It is practical for training and teaching using safe and convenient, with larger application value.
2)The present apparatus can apply to simulate a variety of grounding net defects.The true type grounding test apparatus can be with people Can be by connecting big resistance or air switch changes and cut-offs connection status to manufacture N number of different Grounding breakpoint), During ground can be simulated there are the various situations such as corrosion causes resistance change big or direct rust is disconnected in earth conductor, for moulds such as verification experimental verifications Type is set up simple and reliable, convenient and swift.
3)The present apparatus is simple and reliable for structure, is easy to control and safeguards, air switch is located at earth's surface conveniently also can may be used in operation With free dismounting, while being substituted for the big resistance of transition in the case where being necessary, flexibility ratio is high.
Above-mentioned specific embodiment is used for illustrating the present invention, rather than limiting the invention, in spirit of the invention In scope of the claims, any modifications and changes made to the present invention both fall within protection scope of the present invention.

Claims (9)

1. true type grounding test apparatus of a kind of standard, it is characterised in that:Including ground brick layer and dirt bed, the two is upper and lower to be close to set Put, grounded screen, multiple down conductor, multiple air switches for connecting earth's surface power equipment are provided with the dirt bed With earth conductor in multiple ground, described air switch is connected in series by earth conductor in ground and grounded screen, and earth's surface electric power sets Standby down conductor is directly connected with grounded screen;
Described grounded screen is flushed ground wire by telluric water and the flat sideline of telluric water is constituted, and the flat sideline of described telluric water sets for closed loop Put, and outward flange is arc chord angle setting;The telluric water flushes ground wire a plurality of, and every telluric water flushes ground wire two ends difference It is fixedly connected with the flat sideline of telluric water, and a plurality of telluric water flushes interaction setting between ground wire, constitutes multiple interaction points;
Flushed in any one telluric water and be provided with a contact point, the contact point on ground wire between any two interaction point Include cement solidification well and be correspondingly arranged in two ground of cement solidification well Inner earth conductor and be arranged on cement solidification well The air switch of top one, earth conductor is set with cement solidification well gap in the ground, and air switch two ends pass through two respectively Earth conductor flushes ground wire and is in series with the telluric water where contact point in individual ground.
2. true type grounding test apparatus of standard according to claim 1, it is characterised in that:Described also includes a mark Accurate true type grounding test apparatus nameplate, the true type grounding test apparatus nameplate of described standard is arranged on grounded screen outside, and standard The correspondence position of each contact point in grounded screen is portrayed on true type grounding test apparatus nameplate.
3. true type grounding test apparatus of standard according to claim 2, it is characterised in that:The contact point sets gradually Have in numbering, and the display of numbering correspondence and the true type grounding test apparatus nameplate of standard.
4. true type grounding test apparatus of standard according to claim 3, it is characterised in that:Rain-repellent cover is also included, The rain-repellent cover is located at the outside of air switch, and rain-repellent cover bottom as dirt bed.
5. true type grounding test apparatus of standard according to claim 4, it is characterised in that:Set on described rain-repellent cover It is equipped with observation window.
6. true type grounding test apparatus of standard according to claim 5, it is characterised in that:Described this body section of grounded screen It is band iron, and meets the calculating of system heat-stable calibration.
7. true type grounding test apparatus of standard according to claim 6, it is characterised in that:Set on described grounded screen body It is equipped with anticorrosive coat and anti oxidation layer.
8. true type grounding test apparatus of standard according to claim 7, it is characterised in that:The bottom of the cement solidification well It is provided with multiple osculums.
9. true type grounding test apparatus of standard according to claim 8, it is characterised in that:Described telluric water flushes ground wire Laying depth cannot be less than 0.8m.
CN201710040767.0A 2017-01-20 2017-01-20 Standard true type grounding test device Active CN106707066B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107167473A (en) * 2017-06-14 2017-09-15 深圳供电局有限公司 Exempt from excavation formula transformer substation grounding grid degree of corrosion monitoring devices based on humidity changes
CN107255617A (en) * 2017-06-14 2017-10-17 深圳供电局有限公司 Exempt from excavation formula transformer substation grounding grid degree of corrosion monitoring devices based on liquid level changes
CN107340227A (en) * 2017-06-14 2017-11-10 深圳供电局有限公司 Exempt from excavation formula transformer substation grounding grid degree of corrosion monitoring devices based on vacuum

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010216958A (en) * 2009-03-16 2010-09-30 East Japan Railway Co Method and device for testing grounding device
CN205355280U (en) * 2016-02-18 2016-06-29 国网技术学院 Ground net is used in electric experimental training

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010216958A (en) * 2009-03-16 2010-09-30 East Japan Railway Co Method and device for testing grounding device
CN205355280U (en) * 2016-02-18 2016-06-29 国网技术学院 Ground net is used in electric experimental training

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
车传强;付文光;顾宇宏;燕宝峰;康琪;: "大型接地网测试参数分析" *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107167473A (en) * 2017-06-14 2017-09-15 深圳供电局有限公司 Exempt from excavation formula transformer substation grounding grid degree of corrosion monitoring devices based on humidity changes
CN107255617A (en) * 2017-06-14 2017-10-17 深圳供电局有限公司 Exempt from excavation formula transformer substation grounding grid degree of corrosion monitoring devices based on liquid level changes
CN107340227A (en) * 2017-06-14 2017-11-10 深圳供电局有限公司 Exempt from excavation formula transformer substation grounding grid degree of corrosion monitoring devices based on vacuum

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