CN104280618A - Online detection method of grounding resistor - Google Patents
Online detection method of grounding resistor Download PDFInfo
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- CN104280618A CN104280618A CN201410534814.3A CN201410534814A CN104280618A CN 104280618 A CN104280618 A CN 104280618A CN 201410534814 A CN201410534814 A CN 201410534814A CN 104280618 A CN104280618 A CN 104280618A
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Abstract
The invention relates to an online detection method of a grounding resistor. The voltage and the current of the grounding resistor to be measured are measured through an auxiliary electrode embedded system, and the measured voltage signal and the measured current signal are transmitted to a measuring system, wherein the auxiliary electrode embedded system is of a sealed structure. Data processing is performed on the received voltage signal and the received current signal through the measuring system. The resistance value of the grounding resistor is obtained, and the measured resistance value of the grounding resistor is locally displayed or transmitted to a master station management control system. The resistance value of the grounding resistor is displayed and managed by the master station management control system. The online detection method of the grounding resistor effectively solves the problem existing in measurement of grounding resistors in the prior art, achieves efficient and real-time online measurement of grounding resistors, is not limited by the site or influenced by environmental interference, greatly improves the measuring accuracy, greatly reduces manual error, is favorable for finding out problems as soon as possible to take measures in time for maintenance, and thus guarantees safe operation of relevant lightning protection system equipment and the like.
Description
Technical field
The present invention relates to resistance device detection technique field, particularly relate to the online test method of stake resistance.
Background technology
Excellent earthed system is the important guarantee of electric power, telecommunications, electrical equipment safe and reliable operation.Such as, stake resistance is as the important ingredient of Lightning Protection system one, and the height of its resistance directly decides the barrier propterty of whole system, and stake resistance size is the judging basis of earthed system quality.At present, ubiquitous problem is, because grounding body is embedded in underground throughout the year, the reasons such as acid and alkali corrosion, disaster or artificial destruction easily cause the inefficacy of ground resistance apparatus, and then cause the rising of grounding resistance of transmission value, can be caused Ground Electric Potential Rise when website is struck by lightning, counterattack equipment, will directly jeopardize the safe operation of equipment set time serious.Therefore, stake resistance is carried out accurately and fast, simple and direct, measure reliably, also become the urgent technology needs of lightning protection correlative technology field.
In traditional measuring method, main employing megger formula surveying instrument, it needs to place auxiliary electrode according to the requirement of three electrode method standard, but in arduous environment, cannot meet this requirement in the wild, and the precision measured significantly is reduced; Moreover strong electromagnetic environment exists the coupling influence of inductance and electric capacity in grounding resistance measurement, make jaw type grounding resistance measurement cannot obtain stake resistance resistance information accurately and effectively.In addition, the resistance of earthed system is obtained fast in time, for the property loss judging that whether the safeguard procedures of power electrical devices are effective, avoid and reduce the country and people, significant.But for building the unmanned facility in the rough circumstances of field, current method of testing all cannot achieve a butt joint effective detection of earth resistance.
Therefore, the power frequency grounding resistance value grasping earthing device in real time becomes power electronic system problem demanding prompt solution.
Summary of the invention
The object of the invention is, for prior art Problems existing, the online test method of stake resistance is provided, the online operation conditions detecting grounding body real-time and accurately, measurement result is no longer varied with each individual, test specification is no longer limited by place, measuring accuracy is no longer affected by environmental interference, thus be beneficial to Timeliness coverage problem, take corresponding treatment measures.
The technical scheme that the present invention deals with problems is: the online test method of stake resistance, comprises the steps:
(1) measured the voltage and current of stake resistance to be measured by auxiliary electrode embedded system, and by surveyed voltage signal and current signal transfer to measuring system, wherein, described auxiliary electrode embedded system is the structure of sealing;
(2) by described measuring system, data processing is carried out to the voltage signal received and current signal, obtain the resistance of stake resistance, and the resistance of surveyed stake resistance carried out this locality display or be transferred to main website management control system;
(3) resistance of described main website management control system to the stake resistance received shows and manages.
Further, described auxiliary electrode embedded system is connected for the loop of grounding resistance measurement with described measuring system by pre-buried signal cable, and described auxiliary electrode embedded system is controlled by described measuring system.
Further, described auxiliary electrode embedded system and measuring system are controlled by main website management control system, described auxiliary electrode embedded system is connected by signal cable with described measuring system, and described main website management control system is connected by wired or wireless mode with described measuring system.
Further, in described auxiliary electrode embedded system, be provided with electric current inspection box and voltage inspection box, described electric current inspection box gathers the current signal of stake resistance to be measured and is transferred to described measuring system, and described voltage inspection box gathers the voltage signal of stake resistance to be measured and is transferred to described measuring system; In described measuring system, be provided with signal gathering unit, computing unit, alignment unit, local display unit and communication transfer unit; Receive the current signal of described electric current inspection box transmission and the voltage signal of voltage inspection box transmission by described signal gathering unit, and be transferred to described computing unit; In described computing unit, data processing is carried out to received signal, obtain the resistance of surveyed stake resistance, and the resistance of gained stake resistance is directly transferred to local display unit, by described communication transfer unit, the resistance of gained stake resistance is transferred to main website management control system; Wherein, carry out Data processing at described computing unit, by described alignment unit, the basic calculation value that computing unit adopts is calibrated.
Further, in the laying construction process of stake resistance, described auxiliary electrode embedded system is arranged with stake resistance simultaneously.
Further, described main website management control system is by the resistance of the long-range real-time telemetry stake resistance of communication transfer unit.
Further, in the alignment unit of described measuring system, FIR filter is provided with.Preferably, described FIR filter is the FIR filter based on FFT Interpolation Method Design.
Apply the online test method of stake resistance of the present invention, by pre-buried auxiliary electrode system, the measuring accuracy of stake resistance is not only made to be improved, make measurement more convenient, and described pre-buried auxiliary electrode system and measuring system and main website management control system effectively combine the resistance of checking earthing device according to managerial demand at any time realizing real-time online.Generally, avoid geographical environment, electromagnetic environment and artificial quality differences to the impact of measuring comprehensively, under non-standard three electrode method test condition and also promptly and accurately can detect the operation conditions of grounding body in complicated interference environment, significantly improve measuring accuracy, simultaneously, can realize having local datastore, look facility concurrently, the function such as Long-distance Control and management.
Compared with prior art, the invention has the beneficial effects as follows: method is easy, regulation and control easy to operate, efficiently solve grounding resistance measurement Problems existing in prior art, achieve the efficient real-time online measuring to stake resistance, and, do not limit by place, do not affect by environmental interference, significantly improve measuring accuracy, significantly reduce human error, be beneficial to and pinpoint the problems early, take measures in time to carry out maintenance maintenance, thus ensure the safe operation of the system equipments such as relevant thunder-lightning.
Accompanying drawing explanation
Fig. 1 is the theory structure block diagram of the online test method of stake resistance of the present invention in embodiment 1 and embodiment 2;
Fig. 2 is the theory structure block diagram of the online test method of stake resistance of the present invention in embodiment 3.
Shown in figure: 1-auxiliary electrode embedded system; 2-measuring system; 3-main website management control system; 4-electric current inspection box; 5-voltage inspection box; 6-signal gathering unit; 7-computing unit; 8-alignment unit; 9-communication transfer unit; The local display unit of 10-.
Embodiment
Below in conjunction with specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to this.To have the present invention to make the public and understand thoroughly, in the following preferred embodiment of the present invention, describe concrete details in detail, and do not have the description of these details also can understand the present invention completely for a person skilled in the art.In addition, in order to avoid causing unnecessary obscuring to essence of the present invention, method well known in the art, process, flow process, element and circuit etc. are not described in detail.
Embodiment 1
As shown in Figure 1, the online test method of a kind of stake resistance of the present invention, comprises the steps:
(1) measured the voltage and current of stake resistance to be measured by auxiliary electrode embedded system 1, and by surveyed voltage signal and current signal transfer to measuring system 2, wherein, auxiliary electrode embedded system 1 is the structure of sealing;
(2) by measuring system 2, data processing is carried out to the voltage signal received and current signal, obtain the resistance of stake resistance, and the resistance of surveyed stake resistance carried out this locality display or be transferred to main website management control system 3;
(3) resistance of main website management control system 3 to the stake resistance received shows and manages.
In the above-described embodiments, described auxiliary electrode embedded system 1 is connected for the loop of grounding resistance measurement by pre-buried signal cable with measuring system 2, and auxiliary electrode embedded system 1 is controlled by measuring system 2; Particularly, in the laying construction process of stake resistance, auxiliary electrode embedded system 1 is arranged with stake resistance simultaneously, in the auxiliary electrode embedded system 1 of sealing, boosting voltage pole and electric current pole are set, make boosting voltage pole and electric current pole and tested stake resistance form measuring circuit under measurement subsystem 2 controls by signal cable, complete the real-time online measuring of stake resistance as required.
Apply the online test method of stake resistance of the present invention, ensure that boosting voltage pole and auxiliary current pole and stake resistance are from factor impacts such as acid and alkali corrosion, disaster and artificial destructions by pre-buried auxiliary electrode system 1, for the precision of test is given security; In the architectural process that auxiliary electrode system is laid at earth mat, according to the auxiliary electrode cabling requirement of standard ground resistance measurement, be embedded in underground in advance in advance, for the precision and stability of follow-up grounding resistance measurement provides safeguard; Not only be beneficial to and the measuring accuracy of stake resistance is improved, make measurement more convenient; Pre-buried auxiliary electrode system 1 and measuring system 2 and main website management control system 3 effectively combine the resistance of checking earthing device according to managerial demand at any time realizing real-time online.Generally, avoid geographical environment, electromagnetic environment and artificial quality differences to the impact of measuring comprehensively, also can promptly and accurately measurement of Grounding Resistance under non-standard three electrode method test condition and in complicated interference environment, thus detect the operation conditions of grounding body in real time, significantly improve measuring accuracy, reduce human error; Meanwhile, can realize having local datastore, look facility concurrently, the function such as Long-distance Control and management, is beneficial to and pinpoints the problems early, takes measures in time to carry out maintenance maintenance, thus ensures the safe operation of the system equipments such as relevant thunder-lightning.
Embodiment 2
As shown in Figure 1, the online test method of a kind of stake resistance of the present invention, comprises the steps:
(1) measured the voltage and current of stake resistance to be measured by auxiliary electrode embedded system 1, and by surveyed voltage signal and current signal transfer to measuring system 2, wherein, auxiliary electrode embedded system 1 is the structure of sealing;
(2) by measuring system 2, data processing is carried out to the voltage signal received and current signal, obtain the resistance of stake resistance, and the resistance of surveyed stake resistance carried out this locality display or be transferred to main website management control system 3;
(3) resistance of main website management control system 3 to the stake resistance received shows and manages.
In the above-described embodiments, auxiliary electrode embedded system 1 and measuring system 2 are controlled by main website management control system 3, auxiliary electrode embedded system 1 is connected by signal cable with measuring system 2, and main website management control system 3 and measuring system 2 carry out communication by the networking that is connected of wired or wireless mode; Particularly, in the laying construction process of stake resistance, auxiliary electrode embedded system 1 is arranged with stake resistance simultaneously, boosting voltage pole and electric current pole is provided with in the auxiliary electrode embedded system 1 of sealing, boosting voltage pole and electric current pole and tested stake resistance and measuring system 2 is made to form measuring circuit by signal cable, under the remote control of main website management control system 3, complete the real-time online measuring of stake resistance as required.
Apply the online test method of stake resistance of the present invention, substantially with embodiment 1, particularly, by pre-buried auxiliary electrode system 1, the auxiliary electrode needed for measurement of Grounding Resistance is all effectively protected, avoids the interference of external environment, thus measuring accuracy is improved, make measurement more convenient; By the resistance of the long-range real-time telemetry stake resistance of main website management control system 3, the active reporting of measuring system 2 pairs of stake resistance resistances also can be accepted; Main website management control system 3 can the concrete resistance according to managerial demand remote measurement distant place ground resistance apparatus at any time of real-time online, carry out management and the display of data as required, obtain the resistance of the stake resistance in the equipment such as distant place thunder-lightning quickly and easily, and then make the decision-making of security protection.
Embodiment 3
As shown in Figure 2, the online test method of a kind of stake resistance of the present invention, basic step, vibrational power flow and application are with embodiment 1, particularly, for improving the precision and reliability measured, in described auxiliary electrode embedded system 1, be provided with electric current inspection box 4 and voltage inspection box 5, electric current inspection box 4 gathers the current signal of stake resistance to be measured and is transferred to measuring system 2, and voltage inspection box 5 gathers the voltage signal of stake resistance to be measured and is transferred to measuring system 2; In described measuring system 2, be provided with signal gathering unit 6, computing unit 7, alignment unit 8, communication transfer unit 9 and local display unit 10; By the voltage signal that current signal and the voltage inspection box 5 of described signal gathering unit 6 received current inspection box 4 transmission transmit, and be transferred to computing unit 7; In described computing unit 7, data processing is carried out to received signal, obtain the resistance of surveyed stake resistance, and the resistance of gained stake resistance is directly transferred to local display unit 10, by communication transfer unit 9, the resistance of gained stake resistance is transferred to main website management control system 3; Wherein, carry out Data processing at computing unit 7, the basic calculation value adopted by alignment unit 8 pairs of computing units 7 is calibrated.
In the above-described embodiments, described main website management control system 3 can by the resistance of the long-range real-time telemetry earthing device of communication transfer unit 9, thus can be convenient to by the network remote control and management equipment relevant to stake resistance, be beneficial to and pinpoint the problems early, take measures in time to carry out maintenance maintenance, thus ensure the safe operation of the system equipments such as relevant thunder-lightning.
In the above-described embodiments, described electric current inspection box 4 and voltage inspection box 5 are hermetically-sealed construction, to ensure that the auxiliary electrode of measurement of Grounding Resistance is from erosion further, improve the precision of grounding resistance measurement.For obtaining the measurement resistance of more accurate stake resistance, strengthening the antijamming capability of the factors such as the electromagnetism existed to external world, in the alignment unit of described measuring system 2, being provided with FIR filter; Preferably, described FIR filter is the FIR filter based on FFT Interpolation Method Design.
Apply the online test method of stake resistance of the present invention; basic with embodiment 1; the stake resistance on-line detecting system be made up of auxiliary electrode embedded system 1, measuring system 2 and main website management system 3; the resistance of the measurement of Grounding Resistance of real-time online; the drawback of the traditional grounding resistance measurement of effective solution; significantly improve precision and the reliability of detection, the equipment for related application stake resistance provides maintenance protection timely.
The invention is not restricted to above-mentioned embodiment, those skilled in the art make to any apparent improvement of above-mentioned embodiment or change, all can not exceed the protection domain of design of the present invention and claims.
Claims (7)
1. the online test method of stake resistance, is characterized in that, comprises the steps:
(1) measured the voltage and current of stake resistance to be measured by auxiliary electrode embedded system, and by surveyed voltage signal and current signal transfer to measuring system, wherein, described auxiliary electrode embedded system is the structure of sealing;
(2) by described measuring system, data processing is carried out to the voltage signal received and current signal, obtain the resistance of stake resistance, and the resistance of surveyed stake resistance carried out this locality display or be transferred to main website management control system;
(3) resistance of described main website management control system to the stake resistance received shows and manages.
2. the online test method of stake resistance according to claim 1, it is characterized in that: described auxiliary electrode embedded system is connected for the loop of grounding resistance measurement with described measuring system by pre-buried signal cable, and described auxiliary electrode embedded system is controlled by described measuring system.
3. the online test method of stake resistance according to claim 1, it is characterized in that: described auxiliary electrode embedded system and measuring system are controlled by main website management control system, described auxiliary electrode embedded system is connected by signal cable with described measuring system, and described main website management control system is connected by wired or wireless mode with described measuring system.
4. the online test method of the stake resistance according to any one of claim 1-3, it is characterized in that: in described auxiliary electrode embedded system, be provided with electric current inspection box and voltage inspection box, described electric current inspection box gathers the current signal of stake resistance to be measured and is transferred to described measuring system, and described voltage inspection box gathers the voltage signal of stake resistance to be measured and is transferred to described measuring system;
In described measuring system, be provided with signal gathering unit, computing unit, alignment unit, local display unit and communication transfer unit;
Receive the current signal of described electric current inspection box transmission and the voltage signal of voltage inspection box transmission by described signal gathering unit, and be transferred to described computing unit;
In described computing unit, data processing is carried out to received signal, obtain the resistance of surveyed stake resistance, and the resistance of gained stake resistance is directly transferred to local display unit, by described communication transfer unit, the resistance of gained stake resistance is transferred to main website management control system; Wherein, carry out Data processing at described computing unit, by described alignment unit, the basic calculation value that computing unit adopts is calibrated.
5. the online test method of stake resistance according to claim 4, is characterized in that: described main website management control system is by the resistance of the long-range real-time telemetry stake resistance of communication transfer unit.
6. the online test method of stake resistance according to claim 4, is characterized in that: in the alignment unit of described measuring system, be provided with FIR filter.
7. the online test method of stake resistance according to claim 6, is characterized in that: described FIR filter is the FIR filter based on FFT Interpolation Method Design.
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| CN201410534814.3A CN104280618A (en) | 2014-10-11 | 2014-10-11 | Online detection method of grounding resistor |
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| CN201410534814.3A CN104280618A (en) | 2014-10-11 | 2014-10-11 | Online detection method of grounding resistor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037368A (en) * | 2017-12-28 | 2018-05-15 | 广东电网有限责任公司韶关供电局 | A kind of insulating resistance measuring device |
| CN113534706A (en) * | 2021-07-12 | 2021-10-22 | 河南九域博慧方舟咨询发展有限公司 | Intelligent detection and analysis system for grounding resistance of transformer substation |
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| JP2000206162A (en) * | 1999-01-11 | 2000-07-28 | Ntt Power & Building Facilities Inc | Method and system for measuring grounding resistance |
| JP2004309182A (en) * | 2003-04-02 | 2004-11-04 | Chubu Electric Power Co Inc | Instrument and method for measuring ground resistance |
| CN101923116A (en) * | 2009-06-13 | 2010-12-22 | 孙巍巍 | Grounding resistance measuring system |
| CN102866301A (en) * | 2012-09-18 | 2013-01-09 | 深圳远征技术有限公司 | Grounding resistance analyzing device and grounding resistance analyzing method |
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- 2014-10-11 CN CN201410534814.3A patent/CN104280618A/en active Pending
Patent Citations (4)
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| JP2000206162A (en) * | 1999-01-11 | 2000-07-28 | Ntt Power & Building Facilities Inc | Method and system for measuring grounding resistance |
| JP2004309182A (en) * | 2003-04-02 | 2004-11-04 | Chubu Electric Power Co Inc | Instrument and method for measuring ground resistance |
| CN101923116A (en) * | 2009-06-13 | 2010-12-22 | 孙巍巍 | Grounding resistance measuring system |
| CN102866301A (en) * | 2012-09-18 | 2013-01-09 | 深圳远征技术有限公司 | Grounding resistance analyzing device and grounding resistance analyzing method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108037368A (en) * | 2017-12-28 | 2018-05-15 | 广东电网有限责任公司韶关供电局 | A kind of insulating resistance measuring device |
| CN113534706A (en) * | 2021-07-12 | 2021-10-22 | 河南九域博慧方舟咨询发展有限公司 | Intelligent detection and analysis system for grounding resistance of transformer substation |
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