CN206557145U - A kind of power cable makes moist detection means - Google Patents
A kind of power cable makes moist detection means Download PDFInfo
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- CN206557145U CN206557145U CN201720246469.2U CN201720246469U CN206557145U CN 206557145 U CN206557145 U CN 206557145U CN 201720246469 U CN201720246469 U CN 201720246469U CN 206557145 U CN206557145 U CN 206557145U
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- module
- pole plate
- power cable
- dielectric constant
- detection means
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Abstract
A kind of power cable makes moist detection means, including input block, measuring unit, signal processing unit and output unit.Input block includes variable-frequency power sources, environment temperature sensor, air humidity sensor and operation keyboard.Measuring unit includes pincerlike folder, pole plate and capacitance measurement module.Signal processing unit includes filtration module, A/D modular converters, dielectric constant computing module and industrial computer.Output module includes storage module, display and data print module.The pincerlike tong chopses both sides are inlaid with two-plate, pole plate measures system with power supply and capacitance measurement module formation capacitance signal, signal will be measured and be sent to filtration module, the signal input A/D modular converters handled after filtering, the data signal input dielectric constant computing module progress after conversion can be calculated the dielectric constant of medium between pole plate.The data for being extracted environment temperature sensor and air humidity sensor by industrial computer are modified to the dielectric constant of measurement, the dielectric permittivity after being optimized.It is compared by the dielectric constant values of the undamped power cable of storage with measured value, the situation of making moist of power cable can be detected.
Description
Technical field
The utility model is related to power cable fault detection field, devises a kind of power cable and makes moist detection means,
Situation of making moist for detecting power cable.
Background technology
Power cable has the advantages that safe and reliable, durable and maintenance is small, but for the working environment of power cable, one
As direct-burried in underground, humid environment and the phenomenon that there is ponding.Meanwhile, during traction, it some times happens that sheath is drawn
The situation of wound, thus easily there is the phenomenon made moist in operation in power cable, the detection made moist to power cable, is conducive to electric power
The safe operation of cable.In the running of the power cable made moist, acted on by electric field, it is existing that polarization can occur for hydrone
As.Because hydrone is polar molecule, dielectric constant is larger, in industrial-frequency alternating current pressure, can produce heat, accelerate power cable
The aging of insulation, has influence on the performance of insulation.Meanwhile, water tree can be also formed, causes shelf depreciation, when aggravating when discharging, electric power
The insulation of cable, which has, will form short trouble after breakdown possibility, insulation breakdown, influence to customer power supply.Because these are former
Cause, it is necessary to design a kind of device, timely detects the situation of making moist of power cable, so as to take corresponding measure, it is ensured that can
By power supply.
The content of the invention
In order to overcome the shortcomings of existence conditions, the utility model makes moist detection means, the dress there is provided a kind of power cable
The situation of making moist of power cable can be detected by putting, and the defect of making moist of power cable be found in time, it is ensured that the safety of power cable
Operation.
The technical scheme that the utility model is taken is：
A kind of power cable makes moist detection means, it is characterised in that including input block, measuring unit, signal transacting list
Member, output unit；The input block includes variable-frequency power sources, environment temperature sensor, air humidity sensor, operation keyboard；
The measuring unit includes pincerlike folder, pole plate, capacitance measurement module；The signal processing unit, which includes filtration module, A/D, to be changed
Module, dielectric constant computing module, industrial computer；The output unit includes storage module, display, data-printing module.
The pole plate is embedded on pincerlike folder, and capacitance measurement module is connected with pole plate by circuit, constitutes plates capacitance
Measuring circuit, for extracting the voltage signal between pole plate, to obtain capacitance voltage signal, capacitance measurement module connection filtering mould
Block, filtration module connection A/D modular converters, A/D modular converters connection dielectric constant computing module, dielectric constant computing module connects
Connect industrial computer.Industrial computer respectively with variable-frequency power sources, environment temperature sensor, air humidity sensor, operation keyboard, storage mould
Block, display, data-printing module are connected, and constitute the intelligence control system of man-machine interaction, can control input and export.
The pincerlike folder is made up of jaw and handle, and jaw one end open, one end is connected by spring stand, and its end is carried
Handle, opening and closing for jaw is can control by fixed handle, and handle base carries signal jack, and jaw is one to fall U shape.
The pole plate is embedded in jaw two-arm as the two-plate of electric capacity, and two pieces of pole plates constitute plane-parallel capacitor, pole
Plate is connected with power supply, and the magnitude of voltage at its two ends can be adjusted by industrial computer by switching on power.Pass through the electric power electricity being put between pole plate
Cable, can constitute a plane-parallel capacitor, by capacitance measurement circuit, can extract the capacitance signal between pole plate, the signal is passed through
Filtering involves A/D conversion process, and dielectric constant computing module can go out dielectric dielectric between pole plate according to the signal of change received
Constant.
The jaw be long 350mm, width 250mm insulation board,
The pole plate is that the aluminum material that long 300mm, width 200mm, thickness are 1mm is constituted.
The pole plate spacing immobilizes with polar plate area, can by measuring the change of capacitance between this capacitor plate
Calculate dielectric dielectric constant values.Because the dielectric constant of water is larger, the dielectric generally than power cable constituent is normal
Number is big, and after power cable makes moist, the dielectric constant of the power cable of measurement can be changed significantly, can thus with it is undamped
The dielectric constant of power cable is compared, and judges the situation of making moist of power cable.
A kind of power cable of the utility model makes moist detection means, has the beneficial effect that：In the running of power cable,
Environmental Water content is high, and power cable is run in this environment for a long time, inevitably produces situation about making moist.Work as electricity
After power cable makes moist, its insulaion resistance declines, that is, shows as high resistive fault.Cable leakage current increase after making moist, moisture is received
Polarization migration occurs for the effect to electric field, forms water tree, easily make it that insulation is breakdown, influences the safe operation of power cable.It is logical
Cross the device, can effectively detect the situation of making moist of power cable, timely find its internal fault, it is ensured that power supply it is reliable
Property.
Brief description of the drawings
Fig. 1 is the model structure of the utility model device.
Fig. 2 is the model workflow diagram of the utility model device.
Embodiment
A kind of power cable makes moist detection means, including input block, measuring unit, signal processing unit, output unit；
The input block 1 includes variable-frequency power sources 101, environment temperature sensor 102, air humidity sensor 103, operation keyboard 104；
The measuring unit includes pincerlike folder 201, pole plate 202, capacitance measurement module 203；The signal processing unit includes filtering mould
Block 301, A/D modular converters 302, dielectric constant computing module 303, industrial computer 304；The output unit includes storage module
401st, display 402, data-printing module 403.
The pole plate 202 is embedded on pincerlike folder 201, and capacitance measurement module 203 is connected with pole plate 202 by circuit,
Plates capacitance measuring circuit is constituted, for extracting the voltage signal between pole plate 202, to obtain capacitance voltage signal, capacitance measurement
Module 203 connects filtration module 301, and filtration module 301 connects A/D modular converters 302, and the connection of A/D modular converters 302 dielectric is normal
Number computing module 303, the connection industrial computer 304 of dielectric constant computing module 303；
Industrial computer 304 respectively with variable-frequency power sources 101, environment temperature sensor 102, air humidity sensor 103, operated key
Disk 104, storage module 401, display 402, data-printing module 403 are connected, and constitute the intelligence control system of man-machine interaction.
The pincerlike folder 201 is made up of jaw and handle, and jaw one end open, one end is connected by spring stand, its end
With handle, opening and closing for jaw is can control by fixed handle, handle base carries signal jack, jaw is one to fall " recessed " word
Type.
The pole plate 202 is embedded in jaw two-arm as the two-plate of electric capacity, and two pieces of pole plates constitute parallel plate capacitor
Device, pole plate is connected with power supply, and the magnitude of voltage at its two ends can be adjusted by industrial computer 304 by switching on power.
The long 350mm of jaw, width 250mm insulation board.
The pole plate 202 is that the aluminum material that long 300mm, width 200mm, thickness are 1mm is constituted.
Environment temperature sensor 102 uses MIK-AL-10 type temperature sensors
Air humidity sensor 103 uses Luo Zhuonike HC2-S type humidity sensors
Capacitance measurement module 203 is using U.S. letter MAX1441 type capacitance detecting chips.
Dielectric constant computing module 303 uses eip1037U industrial PCs.
Data-printing module 403 uses MP100 58MM embedded micro print modules.
As shown in Fig. 2 power cable is placed in pincerlike folder 201 first, the pincerlike folder 201 of regulation causes power cable to be located at
The center of pole plate 202, and it is fixed.Then variable-frequency power sources 101 is opened, with operation keyboard 104, control industrial computer 304 is in pole plate 202
Between making alive, by capacitance measurement module 203 extract pole plate between capacitance signal, the signal of extraction after filtering filter by module 301
Except the harmonic signal in signal, filtered signal is sent to A/D modular converters 302, convert analog signals into as numeral
Signal simultaneously passes to dielectric constant computing module 303, dielectric constant computing module 303 will extract capacitance signal is counted
Calculate, draw the dielectric constant values of medium between pole plate 202.Industrial computer 304 senses environment temperature sensor 102 and air humidity
The signal that device 103 is extracted optimizes processing to the dielectric constant values of calculating, and the data after processing then are sent into storage
Module 401 is stored, while being shown to measured value by display 402.
Dielectric constant values and the undamped power cable dielectric constant values of storage when industrial computer 304 by measuring in real time
It is compared computing, it can be deduced that the situation of making moist of power cable.According to the size of dielectric constant, the journey made moist can be identified
Degree, reasonably to formulate processing scheme.Simultaneously around industrial computer 304, the intelligence control system of man-machine interaction is constituted, be can control
Intelligent display of the display 402 to data, and data-printing module 403 are exported to measurement data.
Claims (5)
- The detection means 1. a kind of power cable makes moist, it is characterised in that：Including input block, measuring unit, signal processing unit, Output unit；The input block includes variable-frequency power sources（101）, environment temperature sensor（102）, air humidity sensor （103）, operation keyboard（104）；The measuring unit includes pincerlike press from both sides（201）, pole plate（202）, capacitance measurement module（203）； The signal processing unit includes filtration module（301）, A/D modular converters（302）, dielectric constant computing module（303）, industry control Machine（304）；The output unit includes storage module（401）, display（402）, data-printing module（403）；The pole plate （202）It is embedded in pincerlike folder（201）On, capacitance measurement module（203）With pole plate（202）It is connected by circuit, constitutes pole plate Capacitance measurement circuit, for extracting pole plate（202）Between voltage signal, to obtain capacitance voltage signal, capacitance measurement module （203）Connect filtration module（301）, filtration module（301）Connect A/D modular converters（302）, A/D modular converters（302）Connection Dielectric constant computing module（303）, dielectric constant computing module（303）Connect industrial computer（304）；Industrial computer（304）Respectively with Variable-frequency power sources（101）, environment temperature sensor（102）, air humidity sensor（103）, operation keyboard（104）, storage module （401）, display（402）, data-printing module（403）It is connected, constitutes the intelligence control system of man-machine interaction.
- 2. a kind of power cable makes moist detection means according to claim 1, it is characterised in that：The pincerlike folder（201）By Jaw and handle composition, jaw one end open, one end are connected by spring stand, and its end carries handle, controllable by fixed handle Jaw opens and closed, and handle base carries signal jack, and jaw is one to fall U shape.
- 3. a kind of power cable makes moist detection means according to claim 1, it is characterised in that：The pole plate（202）As The two-plate of electric capacity, is embedded in jaw two-arm, and two pieces of pole plates constitute plane-parallel capacitor, and pole plate is connected with power supply, connects Power supply can pass through industrial computer（304）Adjust the magnitude of voltage at its two ends.
- 4. a kind of power cable makes moist detection means according to claim 2, it is characterised in that：The jaw be long 350mm, Wide 250mm insulation board.
- 5. a kind of power cable makes moist detection means according to claim 1, it is characterised in that：The pole plate（202）For length 300mm, width 200mm, thickness are constituted for 1mm aluminum material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720246469.2U CN206557145U (en) | 2017-03-14 | 2017-03-14 | A kind of power cable makes moist detection means |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720246469.2U CN206557145U (en) | 2017-03-14 | 2017-03-14 | A kind of power cable makes moist detection means |
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| Publication Number | Publication Date |
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| CN206557145U true CN206557145U (en) | 2017-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720246469.2U Expired - Fee Related CN206557145U (en) | 2017-03-14 | 2017-03-14 | A kind of power cable makes moist detection means |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109799439A (en) * | 2019-03-29 | 2019-05-24 | 云南电网有限责任公司电力科学研究院 | A kind of insulation multi-angle oblique scratches cable dampness experimental evaluation method and device |
| CN110988503A (en) * | 2019-12-30 | 2020-04-10 | 南京弘毅电气自动化有限公司 | Distribution line power frequency electric field wireless measuring device and measurement correcting method |
| CN111999621A (en) * | 2020-07-22 | 2020-11-27 | 海南电网有限责任公司电力科学研究院 | Crosslinked polyethylene cable moisture degree evaluation method based on water content and insulation parameter detection |
-
2017
- 2017-03-14 CN CN201720246469.2U patent/CN206557145U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109799439A (en) * | 2019-03-29 | 2019-05-24 | 云南电网有限责任公司电力科学研究院 | A kind of insulation multi-angle oblique scratches cable dampness experimental evaluation method and device |
| CN109799439B (en) * | 2019-03-29 | 2021-04-13 | 云南电网有限责任公司电力科学研究院 | Insulating multi-angle inclined scratch cable wetting experiment evaluation method and device |
| CN110988503A (en) * | 2019-12-30 | 2020-04-10 | 南京弘毅电气自动化有限公司 | Distribution line power frequency electric field wireless measuring device and measurement correcting method |
| CN111999621A (en) * | 2020-07-22 | 2020-11-27 | 海南电网有限责任公司电力科学研究院 | Crosslinked polyethylene cable moisture degree evaluation method based on water content and insulation parameter detection |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171013 Termination date: 20180314 |
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| CF01 | Termination of patent right due to non-payment of annual fee |