CN103326278A - Technology for arranging and taking up grounding measurement wire of transformer substation grounding grid and pay-off and take-up barrow - Google Patents
Technology for arranging and taking up grounding measurement wire of transformer substation grounding grid and pay-off and take-up barrow Download PDFInfo
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- CN103326278A CN103326278A CN201310215129XA CN201310215129A CN103326278A CN 103326278 A CN103326278 A CN 103326278A CN 201310215129X A CN201310215129X A CN 201310215129XA CN 201310215129 A CN201310215129 A CN 201310215129A CN 103326278 A CN103326278 A CN 103326278A
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Abstract
The invention provides a technology for arranging and taking up a grounding measurement wire of a transformer substation grounding grid. The technology for arranging and taking up the grounding measurement wire of the transformer substation grounding grid comprises the following steps of determining the length of the current electrode and the length of the potential electrode according to the length of a diagonal of the grounding grid and the preset electrode arrangement method, determining the position of the current electrode and the position of the potential electrode, enabling a ground stud of the current electrode and a ground stud of the potential electrode to be earthed, leading out the measurement wire through a pay-off and take-up barrow and arranging the wire in the outward direction on the edge of the ground grid before ground resistance measurement of the ground grid, enabling the measurement wire of the pay-off and take-up barrow which is provided with a wire coil with the measurement wire coiled to be respectively connected with the ground stud of the current electrode and the ground stud of the potential electrode through test pincers, and taking up the wire through coiling the wire coil of the pay-off and take-up barrow in the inward direction on the edge of the grounding grid after the ground resistance measurement of the ground grid is finished. The invention further provides the pay-off and take-up barrow. The technology for arranging and taking up the grounding measurement wire of the transformer substation grounding grid and the pay-off and take-up barrow shorten the pay-off and take-up time, and therefore the efficiency of resistance measurement is improved.
Description
Technical field
The present invention relates to line wiring and take-up technology field, particularly relate to the wiring of substation ground network earthmeter line and take-up technology, retractable cable car.
Background technology
Substation ground network is the important parameter of weighing grounding system validity, fail safe, before transformer station puts into operation, carry out the earth mat test to it, puts into operation back or also needs in case of necessity in transformer station and make regular check on its ground network ground resistance.
At present, three electrode method is the test method that domestic and international large-scale substation ground network ground resistance test is extensively adopted, and needs wiring before the measuring resistance, needs take-up behind the measuring resistance.The conventional wiring of substation ground network earthmeter line and take-up technology are to adopt the method for Artificial Control coil: the general measure line adopts the about 100 meters two copper cash of moulding of a bundle, between the bare copper wire of each bundle, wrap up with the canoe connection and with insulating tape, adopt to twine or will two mould on the test pole that copper cash is fixed on ground stud with screw, connect tester and tested earthing device, manually slotted line is connected up, after having connected up, carry out ground network ground resistance and measure; After test is finished, untie and be wrapped in two the mould copper cash of each bundle between slotted line, take-up is around on separately the disk.When slotted line is longer, the inefficiency that adopts the method for this Artificial Control slotted line to bring.
Existing test technology, retractable cable is the process of the test key link, according to statistics, this link required time accounts for 71.9% of the whole test time, electric current utmost point line and potential pole line accumulative total can reach more than 1000 meter, need many bundle slotted lines to connect and use, the retractable cable consumption time is long, thereby it is low to cause measuring efficient.
Summary of the invention
Based on this, being necessary provides a kind of substation ground network earthmeter line wiring and take-up technology, retractable cable car at owing to the long inefficient problem of measurement that causes of retractable cable time.
A kind of substation ground network earthmeter line wiring and take-up technology comprise step:
Determine the length of the electric current utmost point and the length of potential pole by earth mat catercorner length and default cloth utmost point method, determine the position of the described electric current utmost point and the position of described potential pole, the ground stud of the described electric current utmost point and the ground stud of described potential pole are distinguished ground connection;
Before carrying out the ground network ground resistance measurement, utilizing the retractable cable car to draw slotted line connects up at ground network edge outward direction, adopt the test pincers that the slotted line of described retractable cable car is connected respectively with the ground stud of the described electric current utmost point and the ground stud of described potential pole, wherein, described retractable cable car is provided with the drum that is wound with slotted line;
Carrying out after ground network ground resistance measure to finish, the drum by the described retractable cable car of scrolling carries out take-up at ground network edge inward direction.
Above-mentioned substation ground network earthmeter line wiring and take-up technology utilize the retractable cable car to draw slotted line in the wiring of ground network edge outward direction, adopt this wiring method, have shortened the retractable cable time when slotted line is longer, also can not occur the slotted line knotting simultaneously; Adopt the test pincers that the slotted line of described retractable cable car is connected respectively with the ground stud of the described electric current utmost point and the ground stud of described potential pole, shorten the time of tearing open that connects, strengthened the contact area with ground stud, increased the pressure of contact area, also made measurement result more accurate simultaneously; Reduce folding and unfolding on the whole and connect clearing time, thereby improved the efficient of measuring resistance.
A kind of retractable cable car is used for the wiring of substation ground network earthmeter line and take-up, comprising: support, the drum that is wound with slotted line, wheel, and described support is provided with dismountable lateral strut, and described drum is located at described lateral strut, and described wheel is located on the support,
When unwrapping wire, described retractable cable car is drawn described slotted line according to the first default track and is connected up;
When take-up, described retractable cable car carries out take-up according to the second default described drum of track scrolling.
Above-mentioned retractable cable car, by being provided with dismountable lateral strut onboard, be wound with the drum of slotted line horizontal limb being provided with, thereby when this retractable cable car of use carries out substation ground network ground connection folding and unfolding slotted line, reduce the retractable cable time, thereby improved measuring resistance efficient.
Description of drawings
Fig. 1 is the schematic flow sheet of substation ground network earthmeter line wiring of the present invention and take-up process implementing example;
Fig. 2 is the rearview of retractable cable car embodiment of the present invention;
Fig. 3 is the right view of retractable cable car embodiment of the present invention.
Embodiment
Below be described in detail at each embodiment of substation ground network earthmeter line of the present invention wiring and take-up technology, retractable cable car.
As shown in Figure 1, the schematic flow sheet for substation ground network earthmeter line wiring of the present invention and take-up process implementing example comprises step:
Step S101: determine the length of the electric current utmost point and the length of potential pole by earth mat catercorner length and default cloth utmost point method, determine the position of the electric current utmost point and the position of potential pole, the ground stud of the electric current utmost point and the ground stud of potential pole are distinguished ground connection;
Step S102: before carrying out the ground network ground resistance measurement, utilizing the retractable cable car to draw slotted line connects up at ground network edge outward direction, adopt the test pincers that the slotted line of retractable cable car is connected respectively with the ground stud of the electric current utmost point and the ground stud of potential pole, wherein, the retractable cable car is provided with the drum that is wound with slotted line;
Step S103: carrying out after ground network ground resistance measure to finish, the drum by scrolling retractable cable car carries out take-up at ground network edge inward direction.
Substation ground network earthmeter line wiring of the present invention and take-up technology, utilizing the retractable cable car to draw slotted line connects up at ground network edge outward direction, adopt this wiring method, when slotted line is longer, shortened the retractable cable time, also can not occur the slotted line knotting simultaneously; Adopt the test pincers that the slotted line of retractable cable car is connected respectively with the ground stud of the electric current utmost point and the ground stud of potential pole, shorten connecing the time of tearing open, strengthened the contact area with ground stud, increased the pressure of contact area, the while also makes measurement result more accurate; Reduce folding and unfolding on the whole and connect clearing time, thereby improved the efficient of measuring resistance.Below be specifically described.
Because the phenomenon that slotted line twines never can appear in the cable power line in the unwrapping wire process, therefore can make a unwrapping wire drum, add the pulley design in the time of design unwrapping wire drum, form the retractable cable car of band drum, improve and take the line translational speed, the retractable cable car can be finished before test.
The retractable cable car is dragged to the scene, loads onto the drum that winds slotted line;
Get 4-5 times of earth mat catercorner length as electric current utmost point length, select potential pole length according to different cloth utmost point method (such as straight-line method, 30 degree angle-off set and reverse method), after having determined the position of the electric current utmost point and potential pole, to distinguish ground connection as the ground stud of the electric current utmost point and the ground stud of potential pole, namely be driven underground.Specifically how to determine that the position of the electric current utmost point and potential pole is prior art, do not repeat them here.
Press actual needs, from the retractable cable car, directly draw slotted line in the wiring of ground network edge outward direction by testing crew, adopt special-purpose test pincers, slotted line is connected with ground stud, connect tester and tested earthing device, carry out ground network ground resistance then and measure.Because special-purpose test pincers adopt through-current capability greater than the binding clip of 100A, binding clip includes the spring of enough pressure, adopts double-side saw dentation jaw, with pressure and the contact area that adds large contact surface, guarantee that contact is good, therefore, adopt special-purpose test clipper joint slotted line and ground stud, not only make things convenient for attaching and dismounting, reduce and connect clearing time, and strengthened contact area with ground stud, and increased the pressure of contact-making surface, equally also make measurement result more accurate.
Carrying out after ground network ground resistance measure to finish, the drum by scrolling retractable cable car carries out take-up at ground network edge inward direction.
In a specific embodiment, slotted line comprises many roots slotted line, and sub-slotted line connects by the slotted line connector.Namely adopt the principle of special test slotted line butt joint, the slotted line connector completes before test, interface at each bundle slotted line connects with special measurement line connector, and slotted line is around on the drum, replace traditional two copper cash of moulding to twine the mode that wrap up with insulating tape the back, connect clearing time to reduce slotted line, improve simultaneously and measure accuracy rate.
In a specific embodiment, transformer station is 110kV transformer station.
In a specific embodiment, utilize the retractable cable car to draw slotted line and comprise in ground network edge outward direction wiring step: by wireless remote control signal controlling retractable cable car, the retractable cable car is drawn slotted line and is connected up at ground network edge outward direction; The drum of scrolling retractable cable car carries out the take-up step at ground network edge inward direction and comprises: by wireless remote control signal controlling retractable cable car, retractable cable car scrolling drum carries out take-up at ground network edge inward direction.
In a specific embodiment, technology of the present invention can adopt retractable cable dolly provided by the invention, and this technology is not limited to adopt retractable cable dolly provided by the invention certainly.Conversely, retractable cable dolly of the present invention can be used in this programme technology.
A kind of retractable cable car is used for the wiring of substation ground network earthmeter line and take-up, comprising: support, the drum that is wound with slotted line, wheel, and support is provided with dismountable lateral strut, and drum is located at lateral strut, and wheel is located on the support,
When unwrapping wire, the retractable cable car is drawn slotted line according to the first default track and is connected up;
When take-up, the retractable cable car carries out take-up according to the second default track scrolling drum.
Wherein, the first default track can be earth mat edge outward direction, and the second default track can be the contrary direction of the first default track.By being provided with dismountable lateral strut onboard, being wound with the drum of slotted line horizontal limb being provided with, thereby when using this retractable cable car to carry out substation ground network ground connection folding and unfolding slotted line, having reduced the retractable cable time, thereby improved measuring resistance efficient.
In a specific embodiment, as shown in Figure 2, be the rearview of retractable cable car embodiment of the present invention, as shown in Figure 3, be the right view of retractable cable car embodiment of the present invention.This retractable cable car is respectively equipped with mobilizable first wheel 2 and second wheel 3 in support 1 both sides.When needs connect up, lateral strut 4 is taken apart, the drum 5 that is wound with slotted line is penetrated lateral strut 4, then make lateral strut 4 fixing with support 1, connect up according to the first default track then.When needing take-up, carry out take-up according to the second default track scrolling drum.In a specific embodiment, as shown in Figure 2, drum length is 400, lateral strut length is 540mm, and lateral strut is 340mm with the distance on ground, and the diameter of first wheel and second wheel is 120mm, first wheel and second between-wheel spacing are 630mm, and the handle length of support is 1050mm.As shown in Figure 3, the drum radius is 235mm, and the strong point of the support portion of support and the horizontal range of axletree are 290mm, and the strong point of the support portion of support and the horizontal range of wire coil shaft are 175mm.
In a specific embodiment, the retractable cable car also comprises control device, remote controller, and control device is used for receiving the take-up instruction that remote controller sends, and carries out take-up, receives the cloth line that remote controller sends, and connects up.Such as, when needs connect up, lateral strut is taken apart, the drum that is wound with slotted line is penetrated lateral strut, lateral strut and support are fixed, receive the cloth line that remote controller sends then, connect up.When needing take-up, take-up is carried out in the take-up instruction that receives remote controller.
In the conventional method, unwrapping wire is average consuming time to be 92.4 minutes.And employing the present invention uses the car of belt coil to carry out unwrapping wire, removable folding and unfolding coil holder, and average 31.2 minutes consuming time of unwrapping wire is about 1/3 of the original simple and easy drum unwrapping wire time.
In the conventional method, press the 110kV station and need adopt two copper cash winding backs of moulding to wrap up mode average 30 minutes consuming time with insulating tape with about 10 bundle slotted lines calculating.And in this programme, adopt the special wire connector to connect, and pressing the 110kV station needs to calculate with about 10 bundle leads, and average 1 minute consuming time, be about and adopt two copper cash of moulding to twine the back with 1/30 of the insulating tape wrapping mode time, improved efficient greatly.Simultaneously, adopt this kind connected mode, also reduced the contact resistance of each connector, measure according to prior art, slotted line connector contact resistance average error rate is 1%, adopts the technology after improving, average error rate is down to 0.22%, has improved the accuracy of measuring.Simultaneously, adopt special-purpose test clipper joint slotted line and ground stud, not only make things convenient for attaching and dismounting, reduce connecing clearing time, and strengthened the contact area with ground stud, increased the pressure of contact-making surface, equally also make measurement result more accurate.
When measuring according to the test technology after improving, the 110kV substation ground network grounding resistance measurement time shortened to 3.5 hours by 4.5 hours in the industry, had improved measurement efficient.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (8)
1. a substation ground network earthmeter line connects up and take-up technology, it is characterized in that, comprises step:
Determine the length of the electric current utmost point and the length of potential pole by earth mat catercorner length and default cloth utmost point method, determine the position of the described electric current utmost point and the position of described potential pole, the ground stud of the described electric current utmost point and the ground stud of described potential pole are distinguished ground connection;
Before carrying out the ground network ground resistance measurement, utilizing the retractable cable car to draw slotted line connects up at ground network edge outward direction, adopt the test pincers that the slotted line of described retractable cable car is connected respectively with the ground stud of the described electric current utmost point and the ground stud of described potential pole, wherein, described retractable cable car is provided with the drum that is wound with slotted line;
Carrying out after ground network ground resistance measure to finish, the drum by the described retractable cable car of scrolling carries out take-up at ground network edge inward direction.
2. substation ground network earthmeter line wiring according to claim 1 and take-up technology is characterized in that described slotted line comprises many roots slotted line, and described sub-slotted line connects by the slotted line connector.
3. substation ground network earthmeter line wiring according to claim 1 and 2 and take-up technology is characterized in that,
Describedly utilize the retractable cable car to draw slotted line to comprise in ground network edge outward direction wiring step: by the described retractable cable car of wireless remote control signal controlling, described retractable cable car is drawn slotted line and is connected up at ground network edge outward direction;
The drum of the described retractable cable car of described scrolling carries out the take-up step at ground network edge inward direction and comprises: by the described retractable cable car of wireless remote control signal controlling, the described drum of described retractable cable car scrolling carries out take-up at ground network edge inward direction.
4. substation ground network earthmeter line according to claim 1 and 2 wiring and take-up technology is characterized in that, described default cloth utmost point method comprises straight-line method, 30 ° of angle-off sets, reverse method.
5. substation ground network earthmeter line wiring according to claim 1 and 2 and take-up technology is characterized in that described default earth mat catercorner length is 4 to 5 times of described earth mat catercorner lengths.
6. substation ground network earthmeter line wiring according to claim 1 and 2 and take-up technology is characterized in that described transformer station is 110kV transformer station.
7. a retractable cable car is used for the wiring of substation ground network earthmeter line and take-up, it is characterized in that, comprise: support, the drum that is wound with slotted line, wheel, described support is provided with dismountable lateral strut, and described drum is located at described lateral strut, described wheel is located on the support
When unwrapping wire, described retractable cable car is drawn described slotted line according to the first default track and is connected up;
When take-up, described retractable cable car carries out take-up according to the second default described drum of track scrolling.
8. retractable cable car according to claim 7 is characterized in that, also comprises control device, remote controller, and described control device receives the take-up instruction that described remote controller sends, and carries out take-up, receives the cloth line that described remote controller sends, and connects up.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310215129.XA CN103326278B (en) | 2013-05-31 | 2013-05-31 | The wiring of substation ground network earthmeter line and take-up technique, retractable cable car |
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| CN201310215129.XA CN103326278B (en) | 2013-05-31 | 2013-05-31 | The wiring of substation ground network earthmeter line and take-up technique, retractable cable car |
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| CN103326278B CN103326278B (en) | 2016-09-14 |
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Cited By (3)
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| CN103852667A (en) * | 2014-03-07 | 2014-06-11 | 云南电网公司西双版纳供电局 | Multifunctional and portable transformer substation grounding grid testing device |
| CN104505684A (en) * | 2014-11-26 | 2015-04-08 | 广州电力设计院 | Earth electrode installation method and earth electrode |
| CN108946334A (en) * | 2018-08-03 | 2018-12-07 | 华电电力科学研究院有限公司 | A kind of novel simple take-up unwrapping wire device of Grounding testing impedance line and its application method |
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| CN103852667A (en) * | 2014-03-07 | 2014-06-11 | 云南电网公司西双版纳供电局 | Multifunctional and portable transformer substation grounding grid testing device |
| CN104505684A (en) * | 2014-11-26 | 2015-04-08 | 广州电力设计院 | Earth electrode installation method and earth electrode |
| CN108946334A (en) * | 2018-08-03 | 2018-12-07 | 华电电力科学研究院有限公司 | A kind of novel simple take-up unwrapping wire device of Grounding testing impedance line and its application method |
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Inventor after: Mo Suijiang Inventor after: Lai Qixuan Inventor after: You Weiyang Inventor after: Ma Chengzhi Inventor after: Ou Lin Inventor after: Sun Yihui Inventor after: Chen Haihan Inventor after: Cai Dehua Inventor after: Li Duanjiao Inventor after: Luo Jieyi Inventor after: Pan Fan Inventor after: Zeng Tong Inventor after: Song Mingbo Inventor after: Chen Zihui Inventor before: Mo Suijiang Inventor before: You Weiyang Inventor before: Ma Chengzhi Inventor before: Ou Lin Inventor before: Chen Haihan Inventor before: Li Duanjiao Inventor before: Luo Jieyi Inventor before: Pan Fan Inventor before: Cai Dehua Inventor before: Zeng Tong Inventor before: Song Mingbo Inventor before: Lai Qixuan |
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Free format text: CORRECT: INVENTOR; FROM: MO SUIJIANG CHEN HAIHAN LI DUANJIAO LUO JIEYI PAN CAI DEHUA CENG TONG SONG MINGBO LAI QIXUAN YOU WEIYANG MA CHENGZHI OU LIN TO: MO SUIJIANG CHEN HAIHAN CAI DEHUA LI DUANJIAO LUO JIEYI PAN CENG TONG SONG MINGBO CHEN ZIHUI LAI QIXUAN YOU WEIYANG MA CHENGZHI OU LIN SUN YIHUI |
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Address after: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Patentee after: ELECTRIC POWER RESEARCH INSTITUTE, GUANGDONG POWER GRID CO., LTD. Address before: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Patentee before: Electrical Power Research Institute of Guangdong Power Grid Corporation |