CN105629075A - Grounding resistance detection system with automatic detection function - Google Patents
Grounding resistance detection system with automatic detection function Download PDFInfo
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- CN105629075A CN105629075A CN201511030813.6A CN201511030813A CN105629075A CN 105629075 A CN105629075 A CN 105629075A CN 201511030813 A CN201511030813 A CN 201511030813A CN 105629075 A CN105629075 A CN 105629075A
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- detector
- earth
- grounding resistance
- movable joint
- bus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
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- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention discloses a grounding resistance detection system with an automatic detection function. The grounding resistance detection system comprises a detector, a communication circuit, an emission circuit, a power supply and an earth screen. The emission circuit is connected with the communication circuit via a bus. The communication circuit is connected with the detector via a bus. The detector is connected to the earth screen. The power supply is connected with the detector and provides DC6V power for the detector. The earth screen comprises a power grid A and an earth screen B. One grounding end of the detector is connected with the power grid A via a cable and a movable joint device. The other grounding end of the detector is connected to one end of an overhead line via a cable and a movable joint device. The other end of the overhead line is connected to the earth screen B via a movable joint device through a grounding lead wire. Thus, by establishing the grounding resistance detection system, grounding resistance (grounding impedance) is tested by means of automatic acquisition, and a test resistance value is timely sent to a general control center so that it is convenient for the general control center to determine whether grounding resistance of a monitoring point is qualified. The whole system is proper in design and convenient to use and has a two-stage linkage function.
Description
Technical field
The present invention relates to the field such as power technology, earth resistance (connecing Low ESR) technology, specifically, be a kind of grounding resistance detection system with automatic detection function.
Background technology
Earth resistance is that electric current is flowed into the earth then through greatly flowing to another grounding body or distally spreading the resistance run into by grounding device. Grounding resistance embody electric device with " " good degree that contacts and reflect the scale of grounded screen.
The especially big electrical equipment of a lot of household electrical appliance is as refrigerator, washing machine, and the power line that air-conditioning etc. uses is all three cores. As long as the electrical equipment actually using general civil power has zero line and the live wire two just can normal operation. This root line additional is exactly ground wire, say, that these electrical equipment have to ground connection.
The introducing of grounding technology is the protective measure taked to prevent from electrically or electronically waiting equipment to be struck by lightning at first, it is therefore an objective to the thunder-strike current that thunder and lightning is produced is incorporated into the earth by discharging rod, thus playing the effect of protection building. Simultaneously; ground connection is also a kind of effective means of protection personal safety; the phase line caused when certain reason is (as wire insulation is bad; aging circuit etc.) and when device housings touches; the shell of equipment will produce by dangerous voltage; the electric current thus generated will through protection ground wire to greatly, thus playing personal safety protective effect.
Earth resistance is just used to weigh the important parameter whether ground state is good, it is that electric current is flowed into the earth then through greatly flowing to another grounding body or distally spreading the resistance run into by grounding device, it includes the contact resistance between earth lead and the resistance of grounding body itself, grounding body and the resistance of the earth, and between two grounding bodies the resistance of the earth or grounding body to the ground resistance of unlimited distance. Earth resistance size directly represent electric device with " " good degree that contacts, also reflects the scale of grounded screen. The concept of earth resistance is only applicable to small-sized grounded screen; Along with the reduction of the increasing of grounded screen floor space and soil resistivity, in impedance ground, the effect of perceptual weight is increasing, and large ground network should adopt impedance ground to design.
For high pressure and EHV Substation, it should replace " earth resistance " by the concept of " impedance ground ", suggestion code adopts touch voltage and step voltage as safety criterion simultaneously; Also should select correct result light, the impedance ground of different-frequency measure system acquisition accurately, to ensure the safety of the person, equipment, be beneficial to the safe operation of power system.
Summary of the invention
It is an object of the invention to design a kind of grounding resistance detection system with automatic detection function, build a kind of earth resistance (impedance ground) and test system, utilize the technical approach automatically gathered that earth resistance (connecing Low ESR) is tested, and timely surveyed resistance is sent to overall control center, to facilitate overall control center to determine, whether the grounding resistance of institute monitoring point is qualified, the situation avoiding the occurrence of imperfect earth occurs, and then avoid the occurrence of the generation of life security accident, whole system has design science, easy to use, the function of two-stage linkage.
The present invention is achieved through the following technical solutions: a kind of grounding resistance detection system with automatic detection function, including detector, communicating circuit, radiating circuit, power supply and earth mat, described radiating circuit passes through bus connecting communication circuit, described communicating circuit connects detector by bus, described detector connects earth mat, and described power supply connects detector to detector by DC6V power supply, described earth mat includes electrical network A and earth mat B, one earth terminal of described detector connects electrical network A by cable and movable joint equipment, another earth terminal of described detector is by one end of cable and movable joint equipment link ceases to be busy, the other end of described aerial line connects earth mat B by the grounded lead-in wire of movable joint equipment, build a kind of earth resistance (impedance ground) and test system, utilize the technical approach automatically gathered that earth resistance (connecing Low ESR) is tested, and timely surveyed resistance is sent to overall control center, to facilitate overall control center to determine, whether the grounding resistance of institute monitoring point is qualified, the situation avoiding the occurrence of imperfect earth occurs, and then avoid the occurrence of the generation of life security accident, whole system has design science, easy to use, the function of two-stage linkage.
Further, to better implement the present invention, the resistance making the surveyed earth resistance of detector (connecing Low ESR) can mail to overall control center timely, there is provided decision-making foundation to overall control center, be provided with following structure especially: described radiating circuit adopts the wireless network radiating circuit based on GPRS network or 3G network or 4G network.
Further, to better implement the present invention, it is possible to make the grounding resistance that other earth points detect also mail to the overall control center data foundation as decision-making, particularly be provided with following structure: described communicating circuit is also associated with other earth points.
Further, to better implement the present invention so that the connection between detector and electrical network A is convenient, and detected value is more stable, following structure it is provided with especially: the detector movable joint equipment adopted that is connected with electrical network A is at least one.
Further, to better implement the present invention, make data communication between communicating circuit and detector tens on km distance under without being suppressed, signal weaker or loss, also allow for connection between the two simultaneously, be set to following structure especially: communicating circuit adopts RS485 bus by connecting the described bus of detector.
Further, to better implement the present invention, the data communication between communicating circuit and radiating circuit can adopt serial transmission mode to be transmitted, and is set to following structure especially: the described bus of radiating circuit connecting communication circuit adopts RS232 bus.
Further, to better implement the present invention, the connection between detector and aerial line is more firm, and testing result is more true, is particularly configured to following structure: another earth terminal of detector is at least 2 with the connected movable joint equipment adopted of aerial line.
Further, to better implement the present invention, adopt non-cpntact measurement, ground wire punching by, carry out earth resistance (connecing Low ESR) without the mode of self-inspection, in real time detection, remotely monitoring and detect, and realize the on-line checking of high stability, high reliability, adopt following structure especially: described detector adopts non-contact grounding resistance on-line detector.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) present invention builds a kind of earth resistance (impedance ground) and tests system, utilize the technical approach automatically gathered that earth resistance (connecing Low ESR) is tested, and timely surveyed resistance is sent to overall control center, to facilitate overall control center to determine, whether the grounding resistance of institute monitoring point is qualified, the situation avoiding the occurrence of imperfect earth occurs, and then avoid the occurrence of the generation of life security accident, whole system has design science, easy to use, the function of two-stage linkage.
(2) present invention is according to actual needs, different communication protocol mode is adopted to carry out data transmission between radiating circuit, communicating circuit and detector, the purpose that stable, effective, data are not lost can be reached, remote grounding resistance collection can be completed simultaneously.
(3) present invention adopt can non-cpntact measurement, ground wire punching by, carry out, without self-inspection, in real time detection, the mode remotely monitored, the non-contact grounding resistance on-line detector that earth resistance (connecing Low ESR) detects, it may be achieved high stability, high reliability on-line checking.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, the accompanying drawing used required in embodiment will be briefly described below, it is to be understood that, the following drawings illustrate only certain embodiments of the present invention, therefore the restriction to scope it is not construed as, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other relevant accompanying drawings according to these accompanying drawings.
Fig. 1 is the structured flowchart of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment 1:
As shown in Figure 1, a kind of grounding resistance detection system with automatic detection function, as shown in Figure 1, concrete technical scheme is as follows: include detector, communicating circuit, radiating circuit, power supply and earth mat, described radiating circuit passes through bus connecting communication circuit, described communicating circuit connects detector by bus, and described detector connects earth mat, and described power supply connects detector to detector by DC6V power supply; Described earth mat includes electrical network A and earth mat B, one earth terminal of described detector connects electrical network A by cable and movable joint equipment, another earth terminal of described detector is by one end of cable and movable joint equipment link ceases to be busy, and the other end of described aerial line connects earth mat B by the grounded lead-in wire of movable joint equipment.
Movable joint equipment, for a kind of wiring unit facilitated between line and line or equipment and line.
Overall control center sends detection signal, the circuit path that accepts set in emitted circuit accepts and resolves, resolve the data generated by by the bus transfer between radiating circuit and communicating circuit to communicating circuit, the information gathering the grounding resistance of certain node is sent on the detector at this node place by connection with the bus on detector after making analysis further by communicating circuit, the grounding resistance of this node is tested and generates data back to communicating circuit by the detector at this node place in real time, communicating circuit is back to radiating circuit, radiating circuit sends to overall control center through the sendaisle set by inside, overall control center will according to acquired results, do corresponding decision-making, build a kind of earth resistance (impedance ground) and test system, utilize the technical approach automatically gathered that earth resistance (connecing Low ESR) is tested, and timely surveyed resistance is sent to overall control center, to facilitate overall control center to determine, whether the grounding resistance of institute monitoring point is qualified, the situation avoiding the occurrence of imperfect earth occurs, and then avoid the occurrence of the generation of life security accident, whole system has design science, easy to use, the function of two-stage linkage.
Embodiment 2:
The present embodiment is at the enterprising one-step optimization in the basis of above-described embodiment, further, to better implement the present invention, the resistance making the surveyed earth resistance of detector (connecing Low ESR) can mail to overall control center timely, decision-making foundation is provided to overall control center, as shown in Figure 1, it is provided with following structure especially: include detector, communicating circuit, radiating circuit, power supply and earth mat, described radiating circuit passes through bus connecting communication circuit, described communicating circuit connects detector by bus, described detector connects earth mat, described power supply connects detector to detector by DC6V power supply, described earth mat includes electrical network A and earth mat B, one earth terminal of described detector connects electrical network A by cable and movable joint equipment, another earth terminal of described detector is by one end of cable and movable joint equipment link ceases to be busy, the other end of described aerial line connects earth mat B by the grounded lead-in wire of movable joint equipment, and described radiating circuit adopts the wireless network radiating circuit based on GPRS network or 3G network or 4G network.
Embodiment 3:
The present embodiment is at the enterprising one-step optimization in the basis of embodiment 1, further, to better implement the present invention, the grounding resistance that other earth points detect can be made also to mail to the overall control center data foundation as decision-making, as shown in Figure 1, it particularly is provided with following structure: include detector, communicating circuit, radiating circuit, power supply and earth mat, described radiating circuit passes through bus connecting communication circuit, described communicating circuit connects detector by bus, described detector connects earth mat, and described power supply connects detector to detector by DC6V power supply; Described earth mat includes electrical network A and earth mat B, one earth terminal of described detector connects electrical network A by cable and movable joint equipment, another earth terminal of described detector is by one end of cable and movable joint equipment link ceases to be busy, the other end of described aerial line connects earth mat B by the grounded lead-in wire of movable joint equipment, and described communicating circuit is also associated with other earth points.
Embodiment 4:
The present embodiment is at the enterprising one-step optimization in the basis of embodiment 1, further, to better implement the present invention, make the connection between detector and electrical network A convenient, detected value is more stable, as shown in Figure 1, it is provided with following structure especially: include detector, communicating circuit, radiating circuit, power supply and earth mat, described radiating circuit passes through bus connecting communication circuit, described communicating circuit connects detector by bus, described detector connects earth mat, and described power supply connects detector to detector by DC6V power supply; Described earth mat includes electrical network A and earth mat B, one earth terminal of described detector connects electrical network A by cable and movable joint equipment, another earth terminal of described detector is by one end of cable and movable joint equipment link ceases to be busy, the other end of described aerial line connects earth mat B by the grounded lead-in wire of movable joint equipment, and the detector movable joint equipment adopted that is connected with electrical network A is at least one.
Embodiment 5:
The present embodiment is at the enterprising one-step optimization in the basis of embodiment 1, further, to better implement the present invention, make data communication between communicating circuit and detector tens on km distance under without being suppressed, signal weaker or loss, also allow for connection between the two simultaneously, as shown in Figure 1, it is set to following structure especially: include detector, communicating circuit, radiating circuit, power supply and earth mat, described radiating circuit passes through bus connecting communication circuit, described communicating circuit connects detector by bus, described detector connects earth mat, described power supply connects detector to detector by DC6V power supply, described earth mat includes electrical network A and earth mat B, one earth terminal of described detector connects electrical network A by cable and movable joint equipment, another earth terminal of described detector is by one end of cable and movable joint equipment link ceases to be busy, the other end of described aerial line connects earth mat B by the grounded lead-in wire of movable joint equipment, and communicating circuit adopts RS485 bus by connecting the described bus of detector.
Embodiment 6:
The present embodiment is at the enterprising one-step optimization in the basis of embodiment 1, further, to better implement the present invention, data communication between communicating circuit and radiating circuit can adopt serial transmission mode to be transmitted, as shown in Figure 1, it is set to following structure especially: include detector, communicating circuit, radiating circuit, power supply and earth mat, described radiating circuit passes through bus connecting communication circuit, described communicating circuit connects detector by bus, described detector connects earth mat, and described power supply connects detector to detector by DC6V power supply; Described earth mat includes electrical network A and earth mat B, one earth terminal of described detector connects electrical network A by cable and movable joint equipment, another earth terminal of described detector is by one end of cable and movable joint equipment link ceases to be busy, the other end of described aerial line connects earth mat B by the grounded lead-in wire of movable joint equipment, and the described bus of radiating circuit connecting communication circuit adopts RS232 bus.
Embodiment 7:
The present embodiment is at the enterprising one-step optimization in the basis of embodiment 1, further, to better implement the present invention, connection between detector and aerial line is more firm, testing result is truer, as shown in Figure 1, it is particularly configured to following structure: include detector, communicating circuit, radiating circuit, power supply and earth mat, described radiating circuit passes through bus connecting communication circuit, described communicating circuit connects detector by bus, described detector connects earth mat, and described power supply connects detector to detector by DC6V power supply; Described earth mat includes electrical network A and earth mat B, one earth terminal of described detector connects electrical network A by cable and movable joint equipment, another earth terminal of described detector is by one end of cable and movable joint equipment link ceases to be busy, the other end of described aerial line connects earth mat B by the grounded lead-in wire of movable joint equipment, and another earth terminal of detector is at least 2 with the connected movable joint equipment adopted of aerial line.
Embodiment 8:
The present embodiment is at the enterprising one-step optimization in the basis of any of the above-described embodiment, further, to better implement the present invention, adopt non-cpntact measurement, ground wire punching is passed through, without self-inspection, detection in real time, remotely the mode of monitoring carries out earth resistance (connecing Low ESR) detection, and realize high stability, the on-line checking of high reliability, as shown in Figure 1, adopt following structure especially: include detector, communicating circuit, radiating circuit, power supply and earth mat, described radiating circuit passes through bus connecting communication circuit, described communicating circuit connects detector by bus, described detector connects earth mat, described power supply connects detector to detector by DC6V power supply, described earth mat includes electrical network A and earth mat B, one earth terminal of described detector connects electrical network A by cable and movable joint equipment, another earth terminal of described detector is by one end of cable and movable joint equipment link ceases to be busy, the other end of described aerial line connects earth mat B by the grounded lead-in wire of movable joint equipment, and described detector adopts non-contact grounding resistance on-line detector.
The present invention builds a kind of earth resistance (impedance ground) and tests system, utilize the technical approach automatically gathered that earth resistance (connecing Low ESR) is tested, and timely surveyed resistance is sent to overall control center, to facilitate overall control center to determine, whether the grounding resistance of institute monitoring point is qualified, the situation avoiding the occurrence of imperfect earth occurs, and then avoiding the occurrence of the generation of life security accident, whole system has design science, easy to use, the function of two-stage linkage.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations. All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (8)
1. a grounding resistance detection system with automatic detection function, it is characterized in that: include detector, communicating circuit, radiating circuit, power supply and earth mat, described radiating circuit passes through bus connecting communication circuit, described communicating circuit connects detector by bus, described detector connects earth mat, and described power supply connects detector to detector by DC6V power supply; Described earth mat includes electrical network A and earth mat B, one earth terminal of described detector connects electrical network A by cable and movable joint equipment, another earth terminal of described detector is by one end of cable and movable joint equipment link ceases to be busy, and the other end of described aerial line connects earth mat B by the grounded lead-in wire of movable joint equipment.
2. a kind of grounding resistance detection system with automatic detection function according to claim 1, it is characterised in that: described radiating circuit adopts the wireless network radiating circuit based on GPRS network or 3G network or 4G network.
3. a kind of grounding resistance detection system with automatic detection function according to claim 1, it is characterised in that: described communicating circuit is also associated with other earth points.
4. a kind of grounding resistance detection system with automatic detection function according to claim 1, it is characterised in that: the described detector movable joint equipment adopted that is connected with electrical network A is at least one.
5. a kind of grounding resistance detection system with automatic detection function according to claim 1, it is characterised in that: described communicating circuit adopts RS485 bus by connecting the described bus of detector.
6. a kind of grounding resistance detection system with automatic detection function according to claim 1, it is characterised in that: the described bus of described radiating circuit connecting communication circuit adopts RS232 bus.
7. a kind of grounding resistance detection system with automatic detection function according to claim 1, it is characterised in that: another earth terminal of described detector is at least 2 with the connected movable joint equipment adopted of aerial line.
8. a kind of grounding resistance detection system with automatic detection function according to claim 1 or 4 or 7, it is characterised in that: described detector adopts non-contact grounding resistance on-line detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511030813.6A CN105629075A (en) | 2015-12-31 | 2015-12-31 | Grounding resistance detection system with automatic detection function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511030813.6A CN105629075A (en) | 2015-12-31 | 2015-12-31 | Grounding resistance detection system with automatic detection function |
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| CN105629075A true CN105629075A (en) | 2016-06-01 |
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| CN201511030813.6A Pending CN105629075A (en) | 2015-12-31 | 2015-12-31 | Grounding resistance detection system with automatic detection function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108459207A (en) * | 2018-07-06 | 2018-08-28 | 广东电网有限责任公司 | Earth connection measurement plant and ground wire detecting system |
| CN113687146A (en) * | 2021-08-13 | 2021-11-23 | 国网河北省电力有限公司检修分公司 | Grounding grid downlead testing arrangement based on wireless transmission |
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| CN108459207A (en) * | 2018-07-06 | 2018-08-28 | 广东电网有限责任公司 | Earth connection measurement plant and ground wire detecting system |
| CN113687146A (en) * | 2021-08-13 | 2021-11-23 | 国网河北省电力有限公司检修分公司 | Grounding grid downlead testing arrangement based on wireless transmission |
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