CN104749443A - Measuring device for grounding resistance - Google Patents
Measuring device for grounding resistance Download PDFInfo
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- CN104749443A CN104749443A CN201310749365.XA CN201310749365A CN104749443A CN 104749443 A CN104749443 A CN 104749443A CN 201310749365 A CN201310749365 A CN 201310749365A CN 104749443 A CN104749443 A CN 104749443A
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- apu
- control device
- earth resistance
- generating means
- grounding
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Abstract
The invention relates to a measuring device for multi-point grounding resistance. The device comprises a generating device, a receiving device, a control device, an analyzing processing device, a display device and a communication device, wherein the generating device is connected with the control device; the receiving device is connected with the analyzing processing device; the grounding device is connected with a grounding point to be measured through a conductor; the communication device is connected with the control device; the analyzing processing device is connected with the display device. According to the measuring device, impact current is charged to a grounding loop and acquired and analyzed; the potential risk of grounding of the grounding point to be measured can be detected without excavating to damage the working environment; the impact grounding resistance can be accurately and reliably measured, and the updating and other functions can be achieved.
Description
Technical field
The present invention relates to electric power electrical apparatus field, particularly relate to a kind of novel measurement of Grounding Resistance system.
Background technology
Thunder and lightning aloft to be discharged the special meteor of caused one by charged cloud.Thunder and lightning is the major reason causing electronic equipment to damage, and it threatens the safe and stable operation of the every field electronic informations such as building, railway, civil aviaton, communication, industry control, military affairs.Lightning protection is one of measure solved the problem, in current lightning protection field, earthing device be set to very one of the key link, not only relate to releasing of thunder and lightning, more be related to the normal operation of personal safety, device security and system, present various technical manuals to the concrete setting of earthing device, as parameter, inspection criterion etc. all have explicit stipulation.
The size of grounding resistance weighs one of important indicator that whether grounded screen meet design requirement, and grounding resistance increases the effect that directly can affect lightning protection, even causes operation irregularity and the damage of system equipment.So the state understanding stake resistance is in real time necessary very much, and accurately to obtain Resistance of Grounding Grids value, the most important thing is the measuring method that GPRS is correct and technology.
Along with the UHV (ultra-high voltage) of Large Copacity, long distance power transmission, the appearance in succession of extra-high voltage grid, in electric system, earth short circuit current is increasing, and this proposes requirement that is higher and that upgrade to the ground connection of electric system undoubtedly.The accident that electric power line pole tower causes by being struck by lightning is more, but the measurement of power frequency earthing resistance is generally only focused in the measurement of earthing device resistance at present, and seldom can measure the impulse earthed resistance of earthing device.
Because transmission line of lightning strike causes the accident of line tripping to get more and more, reducing the impulse earthed resistance of earthing device is reduce one of transmission line lightning stroke fault very effective way, and how to detect efficiently and accurately the impulse earthed resistance measuring shaft tower also just become power industry in the urgent need to.When dash current enters grounding body, the transient process of series of complex will be caused. the effective resistance value that each instant earthing body presents all may be different.And moment that not necessarily electric current is maximum in moment that on grounding body, maximum voltage occurs.
Therefore, accurately and reliably measure impulse earthed resistance, become the key link of transmission line of electricity safe operation.
Summary of the invention
In order to effectively overcome the above problems, the present invention proposes a kind of earth resistance metering device.
The present invention realizes by the following technical solutions: being made up of generating means, receiving trap, control device, APU and display device, communication device etc. of this earth connection measurement plant.Described generating means is connected with control device, and described receiving trap is connected with APU, and described earthing device is connected with earth point wire to be measured, described communication device connection control device, and described APU connects display device.
The invention has the advantages that:
1, fundamentally stop the drawback of manual measurement high cost, detected data accurate, avoid the randomness and not of manual detection
Consistance.
2, the broken environment that changes jobs of detection need not be excavated, use dash current can detect the ground connection hidden danger that overhead line structures are not easily discovered.
3, can detect in real time, make data be in last state, for lightning protection provides latest data information.
4, the analysis and processing unit of measurement mechanism, can real-time analysis, process related data information, avoid the phenomenon that complicate statistics, analysis efficiency are low.
5, the control module of measurement mechanism, can control the time of dash current and frequency, produce different dash current, and avoid noise for different Grounding.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
As shown in Figure 1: 1, generating means, 2, control device, 3, communication device, 4, receiving trap, 5, APU, 6, display device 7, earth point to be measured, 8, jaw occurs, 9, receive jaw.
Embodiment
Embodiment is discussed below in conjunction with drawings and Examples:
Being made up of generating means (1), receiving trap (4), control device (2), APU (5) and display device (7), communication device (3) etc. of this earth connection measurement plant.Described generating means (1) is connected with control device (2), described receiving trap (4) is connected with APU (5), described earthing device is connected with earth point wire to be measured, described communication device (3) connection control device (2), described APU (5) connects display device (6).
Described generating means (1), by Pulse Power Techniques, produces dash current and injects ground loop.
Described receiving trap (4), by integrated filter and A/D conversion, gathers voltage, the current signal in ground loop.
Described control device (2), controlled the duration of charging and dash current size etc. of generating means.
Described APU (5), is calculated by numerical convolution, obtains impulse earthed resistance.
Described communication device (3), can carry out down loading updating to the program that control device runs.
Described display device (6), the signal testing result that APU can be obtained directly shows.
Utilize technical scheme of the present invention, reach corresponding technique effect, or not departing from the technical scheme equivalents under design philosophy of the present invention, all within protection scope of the present invention.
Claims (7)
1. an earth resistance metering device, is characterized in that: be made up of generating means, receiving trap, control device, APU and display device, communication device etc.; Described generating means is connected with control device, and described receiving trap is connected with APU, and described earthing device is connected with earth point wire to be measured, described communication device connection control device, and described APU connects display device.
2. earth resistance metering device according to claim 1, is characterized in that: described generating means, by Pulse Power Techniques, produces dash current and injects ground loop.
3. earth resistance metering device according to claim 1, is characterized in that: described receiving trap, by integrated filter and A/D conversion, gathers voltage, the current signal in ground loop.
4. earth resistance metering device according to claim 2, is characterized in that: described control device, controls the duration of charging and dash current size etc. of generating means.
5. earth resistance metering device according to claim 3, is characterized in that: described APU, by numerical convolution calculate receiving trap voltage, current signal, obtain impulse earthed resistance.
6. earth resistance metering device according to claim 4, is characterized in that: described communication device, can carry out down loading updating to the program that control device runs.
7. earth resistance metering device according to claim 5, is characterized in that: described display device, and the signal testing result that APU can be obtained directly shows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310749365.XA CN104749443A (en) | 2013-12-31 | 2013-12-31 | Measuring device for grounding resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310749365.XA CN104749443A (en) | 2013-12-31 | 2013-12-31 | Measuring device for grounding resistance |
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| CN104749443A true CN104749443A (en) | 2015-07-01 |
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| CN201310749365.XA Pending CN104749443A (en) | 2013-12-31 | 2013-12-31 | Measuring device for grounding resistance |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277795A (en) * | 2015-10-10 | 2016-01-27 | 安徽中普盛德电子科技有限公司 | Grounding impedance monitoring collecting analyzer |
| CN106597112A (en) * | 2016-10-31 | 2017-04-26 | 罗云峰 | Test equipment and test method thereof for testing impulse grounding resistance of transmission line pole type tower |
| CN106841814A (en) * | 2017-01-26 | 2017-06-13 | 江苏德大自动化设备有限公司 | Earthed system earth resistance on-line monitoring system, on-line detector and monitoring method |
| CN109342822A (en) * | 2018-11-29 | 2019-02-15 | 国网福建省电力有限公司电力科学研究院 | Tower Impulse Grounding Resistance detection method and device |
| CN110398635A (en) * | 2019-07-18 | 2019-11-01 | 中国人民解放军陆军工程大学 | The computation model of ground resistance |
| CN113608031A (en) * | 2021-08-04 | 2021-11-05 | 北京英瑞来科技有限公司 | Method and device for monitoring impulse impedance of transformer substation lightning arrester |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277795A (en) * | 2015-10-10 | 2016-01-27 | 安徽中普盛德电子科技有限公司 | Grounding impedance monitoring collecting analyzer |
| CN105277795B (en) * | 2015-10-10 | 2019-02-26 | 安徽天玄智能科技有限公司 | A kind of impedance ground monitoring acquisition and analysis instrument |
| CN106597112A (en) * | 2016-10-31 | 2017-04-26 | 罗云峰 | Test equipment and test method thereof for testing impulse grounding resistance of transmission line pole type tower |
| CN106597112B (en) * | 2016-10-31 | 2019-04-02 | 杭州潇楠科技有限公司 | Shock ground resistance of transmission line tower test device and its method |
| CN106841814A (en) * | 2017-01-26 | 2017-06-13 | 江苏德大自动化设备有限公司 | Earthed system earth resistance on-line monitoring system, on-line detector and monitoring method |
| CN109342822A (en) * | 2018-11-29 | 2019-02-15 | 国网福建省电力有限公司电力科学研究院 | Tower Impulse Grounding Resistance detection method and device |
| CN110398635A (en) * | 2019-07-18 | 2019-11-01 | 中国人民解放军陆军工程大学 | The computation model of ground resistance |
| CN110398635B (en) * | 2019-07-18 | 2021-09-14 | 中国人民解放军陆军工程大学 | Calculation model of ground resistance |
| CN113608031A (en) * | 2021-08-04 | 2021-11-05 | 北京英瑞来科技有限公司 | Method and device for monitoring impulse impedance of transformer substation lightning arrester |
| CN113608031B (en) * | 2021-08-04 | 2024-02-02 | 北京英瑞来科技有限公司 | Impact impedance monitoring method and device for substation lightning arrester |
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Application publication date: 20150701 |