CN110514904A - Insulating resistance measuring early warning system - Google Patents
Insulating resistance measuring early warning system Download PDFInfo
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- CN110514904A CN110514904A CN201910933656.1A CN201910933656A CN110514904A CN 110514904 A CN110514904 A CN 110514904A CN 201910933656 A CN201910933656 A CN 201910933656A CN 110514904 A CN110514904 A CN 110514904A
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- 238000001514 detection method Methods 0.000 claims abstract description 21
- 238000012545 processing Methods 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims description 37
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 238000005259 measurement Methods 0.000 abstract description 8
- 238000004891 communication Methods 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 5
- 101100236764 Caenorhabditis elegans mcu-1 gene Proteins 0.000 description 4
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- 238000010586 diagram Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
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- 208000025274 Lightning injury Diseases 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
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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
- G01R27/08—Measuring resistance by measuring both voltage and current
-
- 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
- G01R27/205—Measuring contact resistance of connections, e.g. of earth connections
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- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention proposes a kind of insulating resistance measuring early warning systems, including several detection cases, signal acquisition unit is equipped in detection case, signal acquisition unit is connected with signal processing unit, signal processing unit is connected with MCU, MCU is connected with signal generating unit, locating module, clock module, memory module, power module and 4G module respectively, and signal generating unit is connected with signal acquisition unit；The 4G module shows that control system is connected with backstage, and backstage shows that control system is connected with mobile terminal.The present invention exempts to solve line detection by carrying out to the downlead ground resistance at each communication iron tower position, on the one hand ground integrity at each communication iron tower is greatly improved, on the other hand the hard work of extra downlead must be unlocked by avoiding tester, it is applicable to the shaft tower containing any a plurality of downlead, the labor intensity for alleviating staff, also greatly improved measuring accuracy and measurement efficiency.
Description
Technical field
The present invention relates to the technical field of insulating resistance measuring early warning in region more particularly to a kind of insulating resistance measuring are pre-
Alert system.
Background technique
In recent years, lightning stroke trip is constantly in first of all kinds of failures, lightning hazards have become influence transmission line of electricity
An important factor for safe operation, and after route thunderbolt, the Intruding wave for being passed to substation along transmission line of electricity threatens substation again
Interior electrical equipment is often again the principal element for causing substation accident, especially lightening activity is strong, soil resistivity
Distribution transforming equipment failure rate caused by area high, with a varied topography is higher, causes huge economic loss.
Earthing or grounding means is a basic measures for improving overhead transmission line and the resistance to thunder level of distribution transforming equipment, and ground resistance
Size is a kind of necessary means checked earthing or grounding means and whether reach regulatory requirements.In transmission tower operation, periodic test,
It is whether qualified particularly important to measure its ground resistance, accurate measurement of Grounding Resistance can guarantee that earthed system works normally, in time
It was found that the defect of earthed system, avoids the economic loss that may cause since earthed system is unqualified or accident.
The three electrode method and split-core type meter method being commonly used all are manually to measure to ground resistance, and there is workloads
Greatly, low efficiency, defect costly, test period is long, if measurement is spaced the too long defect that cannot find earthed system in time,
Sometimes some artificial errors also be will cause, there are missing inspection and false retrieval hidden danger, field management is horizontal insufficient, it would be highly desirable to solve, region
Interior shaft tower grounding safety pre-alerting ability is poor.
Summary of the invention
For manually being measured to ground resistance, heavy workload, low efficiency, defect costly, test period is long,
The technical problem of shaft tower grounding safety pre-alerting ability difference, the present invention propose a kind of insulating resistance measuring early warning system in region.
To solve the above-mentioned problems, the technical scheme of the present invention is realized as follows:
A kind of insulating resistance measuring early warning system, including several detection cases, detection case is interior to be equipped with signal acquisition unit, and signal is adopted
Collection unit be connected with signal processing unit, signal processing unit is connected with MCU, MCU respectively with signal generating unit, position
Module, clock module, memory module, power module are connected with 4G module, and signal generating unit is connected with signal acquisition unit
It connects；The 4G module is connected with host computer, host computer with backstage show control system be connected, backstage show control system with
Mobile terminal is connected.
Preferably, mounting plate is equipped in the detection case, mounting plate is equipped with several mounting grooves, and signal acquisition unit is put
It sets in mounting groove.
Preferably, the signal acquisition unit includes current transformer and voltage transformer, and current transformer and voltage are mutual
Sensor is connected with signal processing unit and voltage transformer is connected with signal generating unit.
Preferably, the signal processing unit includes Current Voltage conversion module, Current Voltage conversion module difference
With in signal acquisition unit current transformer and voltage transformer be connected, Current Voltage conversion module is connected with filter module
It connects, filter module is connected with range switching module, and range switching module is connected with AC-DC conversion module, AC-DC conversion
Module is connected with AD conversion module, and AD conversion module is connected with MCU.
Preferably, the signal generating unit includes signal generating module, and signal generating module is connected with MCU, signal
Module occurs to be connected with Current Voltage conversion module, Current Voltage conversion module is connected with signal amplification module, and signal is put
Big module is connected with signal selection module, and signal selection module is connected with power amplifier module, power amplifier module and electricity
Pressure mutual inductor is connected.
Preferably, the voltage transformer and current transformer are respectively annular voltage transformer and ring current mutual inductance
Device.
Beneficial effects of the present invention: the present invention is by utilizing voltage transformer to the downlead at each communication iron tower position
And current transformer, voltage transformer also serve as frequency conversion voltage signal and inject coil to downlead injection frequency conversion voltage signal, simultaneously
Current transformer and voltage transformer measure to electric current on downlead and voltage, then set up voltage, current matrix,
Solution show that grounding resistance, ground resistance carry out exempting to solve line detection, on the one hand greatly improves grounding safety at each communication iron tower
Property, the hard work of extra downlead must be unlocked by the other hand avoiding tester, be applicable to containing any a plurality of
The shaft tower of downlead alleviates the labor intensity of staff, measuring accuracy and measurement efficiency also greatly improved；It is right simultaneously
Pole tower ground resistance measures in region, the grounding resistance that monitoring center is measured according to each region, once there is grounding resistance
Not in safe range value, monitoring center sends warning message to Regional Champion person, and notification area responsible person overhauls replace in time
It changes.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is system integrated stand composition of the invention.
Fig. 2 is the structural schematic diagram of detection case in the present invention.
Fig. 3 is the structural schematic diagram of mounting plate in Fig. 2.
Fig. 4 is signal functional block diagram of the invention.
Fig. 5 is the scheme of installation of detection case in the present invention.
In figure, 1 is MCU, and 2 be signal generating module, and 3 be Current Voltage conversion module I, and 4 be signal amplification module, and 5 are
Signal selection module, 6 be power amplifier module, and 7 be voltage transformer, and 8 be current transformer, and 9 be Current Voltage conversion module
II, 10 be filter module, and 11 be range switching module, and 12 be AC-DC conversion module, and 13 be AD conversion module, and 14 be display
Screen, 15 be locating module, and 16 be clock module, and 17 be memory module, and 18 be 4G module, and 19 be power module, and 20 be detection case,
21 be mounting groove.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under that premise of not paying creative labor
Embodiment shall fall within the protection scope of the present invention.
As shown in Fig. 2, a kind of insulating resistance measuring early warning system, including several detection cases 20, detection case are equipped with aobvious
Display screen 14, for showing every detection parameters, detection case 20 is mounted on shaft tower ground display screen 14, and letter is equipped in detection case 20
Number acquisition unit is fixed with mounting plate in detection case 20 as shown in Figure 3, several mounting grooves 21 is offered on mounting plate, are believed
Number acquisition unit is placed in mounting groove 21.
As shown in Figure 1, signal acquisition unit connects on 4 downleads of shaft tower, signal acquisition unit passes through signal wire and letter
Number processing unit is connected, and signal processing unit is connected with MCU1, and MCU1 is fixed respectively with signal generating unit, display screen 14
Position module 15, clock module 16, memory module 17, power module 19 are connected with 4G module 18, and locating module 15 is used for each
Shaft tower position is positioned, and clock module is used for for timing, calendar scheduling, 4G module 18 to host computer or mobile terminal remote transmission
Data, for data to be locally stored, signal generating unit is connected memory module with signal acquisition unit；The 4G module 18 with
Host computer is connected, and host computer is used to receive the data information of each shaft tower location detection, and host computer and backstage show control system
It is connected, received all data is stored to backstage and shown in control system by host computer, and backstage shows control system and movement
End is connected, once there is exception, convenient for notification area, responsible person overhauls in time, and mobile terminal is smart phone or tablet computer.
As shown in figure 4, the signal acquisition unit includes current transformer 8 and voltage transformer 7,8 He of current transformer
Be connected with signal processing unit voltage transformer 7 and the current transformer 8 of voltage transformer 7 is respectively annular voltage transformer
And ring current transformer, voltage transformer and current transformer are placed into mounting groove when not in use, voltage transformer and
Current transformer is in measurement in use, voltage transformer and current transformer are connect respectively on four downleads of shaft tower, electricity
Current transformer 8 and voltage transformer 7 are connected with signal processing unit and voltage transformer 7 is connected with signal generating unit
It connects.
The signal processing unit includes Current Voltage conversion module 3, and Current Voltage conversion module 3 is used for mutual induction of voltage
Device or current transformer detection signal converted, Current Voltage conversion module 3 respectively with the electric current in signal acquisition unit
Mutual inductor 8 is connected with voltage transformer 7, and Current Voltage conversion module 3 is connected with filter module 10, utilizes filter module pair
The signal of conversion is filtered, and filter module 10 is connected with range switching module 11, and crossing range switching module will filter
Signal switch to MCU and correspond in digital quantity range ability, range switching module is connected with 11 AC-DC conversion modules 12, benefit
With AC-DC conversion module will signal carries out being converted into direct current, AC-DC conversion module 12 and AD conversion module to treated
13 are connected, and DC signal is finally converted into digital signal, and AD conversion module 13 is connected with MCU1.
The signal generating unit includes signal generating module 2, and signal generating module 2 is connected with MCU1, MCU control letter
Number module occurs to downlead injecting voltage signal, voltage transformer also serves as voltage injection coil, signal generating module 2 and electric current
Voltage transformation module 3 is connected, and carries out signal conversion, Current Voltage conversion module to signal source using Current Voltage conversion module
3 are connected with signal amplification module 4, and signal amplification module is used for the signal enhanced processing after conversion, signal amplification module 4 with
Signal selection module 5 is connected, and signal selection module is used to provide one and follows the selection exported to signal to three, by one
The signal after signal is converted into another kind compared with standard volume or reference quantity is planted, for dividing scope control, valve sequence or output choosing
It selects, signal selection module 5 is connected with power amplifier module 6, and power amplifier module is used to carry out power amplification to selection signal
Processing, power amplifier module 6 are connected with voltage transformer 7.
As shown in figure 5, when in use connecing voltage transformer and current transformer on downlead, voltage transformer is utilized
The input coil for also serving as frequency variation signal carries out frequency variation signal injection to more downleads, and the line measurement of exempting to solve of pole tower ground resistance uses
Specific matrix equation calculates, and by measuring earth conductor voltage, electric current, establishes the matrix equation of voltage, electric current, specially sets
Zg is tested pole tower ground resistance impedance value, and ZL is all shaft tower parallel equivalent resistance impedance values in left side, and ZR is all bars in right side
Two lightning protection lines are equivalent between respectively tested the first base shaft tower of shaft tower and the left and right sides of tower parallel equivalent resistance impedance value, Z1 and Z2
Resistive impedance value.By solution matrix equation, that is, it can determine circuit parameter.If the ground resistance of shaft tower is Rg, then Rg=Re (Z),
The rapid survey that pole tower ground resistance may be implemented, the hard work of extra downlead must be unlocked by avoiding tester,
It is applicable to alleviate the labor intensity of staff containing the shaft tower of any a plurality of downlead, measurement essence also greatly improved
Exactness and measurement efficiency；The grounding resistance that Background control display systems are measured according to each region in monitoring center, once occur
Grounding resistance is not in safe range value, Background control display systems are held to Regional Champion person in monitoring center movement
End sends warning message, and notification area responsible person overhauls replacement to abnormal area in time.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of insulating resistance measuring early warning system, which is characterized in that including several detection cases (20), set in detection case (20)
There is signal acquisition unit, signal acquisition unit is connected with signal processing unit, and signal processing unit is connected with MCU(1),
MCU(1) respectively with signal generating unit, locating module (15), clock module (16), memory module (17), power module (19)
It is connected with 4G module (18), signal generating unit is connected with signal acquisition unit；The 4G module (18) and host computer phase
Connection, host computer show that control system is connected with backstage, and backstage shows that control system is connected with mobile terminal.
2. insulating resistance measuring early warning system according to claim 1, which is characterized in that be equipped in the detection case (20)
Mounting plate, mounting plate are equipped with several mounting grooves (21), and signal acquisition unit is placed in mounting groove (21).
3. insulating resistance measuring early warning system according to claim 1 or 2, which is characterized in that the signal acquisition unit
Including current transformer (8) and voltage transformer (7), current transformer (8) and voltage transformer (7) are and signal processing unit
It is connected and voltage transformer (7) is connected with signal generating unit.
4. insulating resistance measuring early warning system according to claim 3, which is characterized in that the signal processing unit
Including Current Voltage conversion module (3), Current Voltage conversion module (3) respectively with the current transformer in signal acquisition unit
(8) it is connected with voltage transformer (7), Current Voltage conversion module (3) is connected with filter module (10), filter module (10)
It is connected with range switching module (11), range switching module is connected with (11) AC-DC conversion module (12), and alternating current-direct current turns
Mold changing block (12) is connected with AD conversion module (13), and AD conversion module (13) is connected with MCU(1).
5. insulating resistance measuring early warning system according to claim 3, which is characterized in that the signal generating unit includes
Signal generating module (2), signal generating module (2) are connected with MCU(1), signal generating module (2) and Current Voltage modulus of conversion
Block (3) is connected, and Current Voltage conversion module (3) is connected with signal amplification module (4), signal amplification module (4) and signal
Selecting module (5) is connected, and signal selection module (5) is connected with power amplifier module (6), power amplifier module (6) and electricity
Pressure mutual inductor (7) is connected.
6. insulating resistance measuring early warning system according to claim 4, which is characterized in that the voltage transformer (7) and
Current transformer (8) is respectively annular voltage transformer and ring current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910933656.1A CN110514904A (en) | 2019-09-29 | 2019-09-29 | Insulating resistance measuring early warning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910933656.1A CN110514904A (en) | 2019-09-29 | 2019-09-29 | Insulating resistance measuring early warning system |
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| Publication Number | Publication Date |
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| CN110514904A true CN110514904A (en) | 2019-11-29 |
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| CN201910933656.1A Pending CN110514904A (en) | 2019-09-29 | 2019-09-29 | Insulating resistance measuring early warning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114167141A (en) * | 2021-11-24 | 2022-03-11 | 中国南方电网有限责任公司超高压输电公司曲靖局 | Transmission tower grounding resistance on-line monitoring system based on non-contact measurement method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1828313A (en) * | 2006-02-21 | 2006-09-06 | 武汉高压研究所 | Pole tower earthing resistance quick testing method without unfastening wire and device |
| CN102680798A (en) * | 2012-02-28 | 2012-09-19 | 山东建筑大学 | Online measurement method and device for grounding resistor of rod tower |
| CN105467220A (en) * | 2015-11-20 | 2016-04-06 | 国网山东省电力公司电力科学研究院 | Portable grounding resistance tester |
| CN107656144A (en) * | 2017-11-14 | 2018-02-02 | 国网山东省电力公司电力科学研究院 | A kind of comprehensive detection system and method for transmission line of electricity earthed system |
-
2019
- 2019-09-29 CN CN201910933656.1A patent/CN110514904A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1828313A (en) * | 2006-02-21 | 2006-09-06 | 武汉高压研究所 | Pole tower earthing resistance quick testing method without unfastening wire and device |
| CN102680798A (en) * | 2012-02-28 | 2012-09-19 | 山东建筑大学 | Online measurement method and device for grounding resistor of rod tower |
| CN105467220A (en) * | 2015-11-20 | 2016-04-06 | 国网山东省电力公司电力科学研究院 | Portable grounding resistance tester |
| CN107656144A (en) * | 2017-11-14 | 2018-02-02 | 国网山东省电力公司电力科学研究院 | A kind of comprehensive detection system and method for transmission line of electricity earthed system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114167141A (en) * | 2021-11-24 | 2022-03-11 | 中国南方电网有限责任公司超高压输电公司曲靖局 | Transmission tower grounding resistance on-line monitoring system based on non-contact measurement method |
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