CN106124950A - High voltage electric transmission cable on-line measuring device - Google Patents
High voltage electric transmission cable on-line measuring device Download PDFInfo
- Publication number
- CN106124950A CN106124950A CN201610784213.7A CN201610784213A CN106124950A CN 106124950 A CN106124950 A CN 106124950A CN 201610784213 A CN201610784213 A CN 201610784213A CN 106124950 A CN106124950 A CN 106124950A
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- China
- Prior art keywords
- measuring device
- line measuring
- high voltage
- cable
- transmission cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 19
- 238000004804 winding Methods 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 9
- 229910018605 Ni—Zn Inorganic materials 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 6
- 229920000573 polyethylene Polymers 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000002925 chemical effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a kind of high voltage electric transmission cable on-line measuring device, including current sensor, controller unit and signal gathering unit；Described current sensor is arranged on the earth lead of tested high-voltage cable joint end；Described signal gathering unit is connected with described current sensor, and for the shelf depreciation current signal of earth lead described in Real-time Collection, described controller unit is connected with described signal gathering unit.This high voltage electric transmission cable on-line measuring device can detect the shelf depreciation parameter of high-voltage cable joint position in real time, thus realizes the on-line checking to high tension cable.
Description
Technical field
The present invention relates to electrical equipment technical field, particularly to a kind of high voltage electric transmission cable on-line measuring device.
Background technology
High-voltage cross-linking polythene (XLPE) insulated power cable has good electrical property and hot property, and structure letter
Single, the manufacturing cycle is short, and work tolerable temperature is high, and oil-free is laid conveniently, each electricity being therefore widely used in power system
Pressure grade, and constantly to supertension, the development of extra-high voltage field.High-voltage cross-linking polythene cable compared with conventional overhead transmission line,
Having incomparable advantage at aspects such as installation and operation maintenance, cable is laid on forms such as direct-burried, comb, tunnels mostly
Underground, less by external interference, it is ensured that long-term safe operation, but high-voltage cross-linking polythene cable also has lacking of himself
Fall into, e.g., when twisted polyethylene cable manufactures, due to the problem of manufacturing process, bubble etc. may be caused inside cable exhausted
Edge hidden danger, it addition, laying when, it is most likely that caused damage by the effect from extraneous mechanical force；And when height
Voltage cable is after long-term operation, and its insulated part is because for a long time by physical and chemical effect, moisture or the water from soil
The impact graded, is also easy to be corroded and then cause the defect in insulation；These hidden danger the most all will cause high tension cable
Puncturing of insulation.After high tension cable breaks down, it is impossible to use the conventional methods such as tour to judge the normal of cable duty
Whether.
The change of high tension cable partial discharge quantity can reflect the quality of high-voltage cable insulating situation, office to a certain extent
Portion's discharge capacity be sized to reflect the extent of damage of cable insulation.Therefore, by this characteristic signal energy of partial discharge quantity
Enough effectively the degradation of high-voltage cable insulating is judged.Owing to high-voltage cable joint is in whole Voltage Cable Lines Construction
Relatively weak link, therefore measures shelf depreciation and mainly selects at cable connector, in order to detect high tension cable in real time
Operation conditions and take necessity measure.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of high voltage electric transmission cable on-line measuring device, it is possible to detect in real time
The shelf depreciation parameter of high-voltage cable joint position, thus realize the on-line checking to high tension cable.
In order to solve above-mentioned technical problem, technical scheme is as follows:
A kind of high voltage electric transmission cable on-line measuring device, including current sensor, controller unit and signal gathering unit；
Described current sensor is arranged on the earth lead of tested high-voltage cable joint end；Described signal gathering unit and described electric current
Sensor connects, for the shelf depreciation current signal of earth lead described in Real-time Collection, described controller unit and described signal
Collecting unit connects.
Further, described high voltage electric transmission cable on-line measuring device also includes that communication unit, described communication unit are used for
The shelf depreciation current signal of Real-time Collection is sent to host computer.
Further, described electric transducer is broadband Rogowski coil current sensor, is used for detecting high tension cable and connects
Shelf depreciation current signal in ground wire.Owing to shelf depreciation current amplitude is less, and frequency range is distributed more widely, therefore it is required that
Sensor has wider detection frequency band and higher detection sensitivity.
Further, described Rogowski coil includes that closed magnetic core and winding, described winding uniform winding close described
Close on magnetic core；The pcrmeability of described closed magnetic core is the Ni-Zn ferrite of 200, and integrating resistor is lk Ω, and umber of turn is 10
Circle.
Further, the earth lead of each high-voltage cable joint end corresponding is provided with described broadband Rogowski coil electricity
Flow sensor, is sent to host computer by described communication module by each shelf depreciation current signal.Host computer is according to permissible
Based on LabVIEW platform, develop corresponding inspection software, it is achieved the collection of local discharge signal, show, analyze, the merit such as preservation
Energy.
Use technique scheme, owing to have employed Rogowski coil so that the high voltage electric transmission cable of the present invention is online
Detection device, it is possible to detect in real time the shelf depreciation parameter of high-voltage cable joint position, thus realize high tension cable online
Detection.
Accompanying drawing explanation
Fig. 1 is the high voltage electric transmission cable on-line measuring device structural representation of the present invention；
Fig. 2 is Rogowski coil structure principle chart；
In figure, 10-high-voltage cable joint end, 20-earth lead, 30-current sensor, 31-closed magnetic core, 32-winding.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described further.At this it should be noted that for
The explanation of these embodiments is adapted to assist in and understands the present invention, but is not intended that limitation of the invention.Additionally, it is disclosed below
As long as each embodiment of the present invention in involved technical characteristic do not constitute conflict each other and just can be mutually combined.
As it is shown in figure 1, a kind of high voltage electric transmission cable on-line measuring device, including current sensor 30, controller unit and
Signal gathering unit；Described current sensor 30 is arranged on the earth lead 20 of tested high-voltage cable joint end 10；Described letter
Number collecting unit is connected with described current sensor 30, for the shelf depreciation current signal of earth lead described in Real-time Collection 20,
Described controller unit is connected with described signal gathering unit.
Wherein, described high voltage electric transmission cable on-line measuring device also includes communication unit, and described communication unit is for by real
Time gather shelf depreciation current signal be sent to host computer.
Wherein, described electric transducer is broadband Rogowski coil current sensor 30, is used for detecting high tension cable ground connection
Shelf depreciation current signal in line 20.Owing to shelf depreciation current amplitude is less, and frequency range is distributed more widely, therefore it is required that
Sensor has wider detection frequency band and higher detection sensitivity.
As in figure 2 it is shown, described Rogowski coil includes that closed magnetic core 31 and winding 32, described winding 32 uniform winding exist
In described closed magnetic core 31；The Ni-Zn ferrite that pcrmeability is 200 of described closed magnetic core 31, integrating resistor is lk Ω, winding
The number of turn is 10 circles.
Wherein, the earth lead 20 of each high-voltage cable joint end 10 corresponding is provided with described broadband Rogowski coil electricity
Flow sensor 30, is sent to host computer by described communication module by each shelf depreciation current signal.Host computer is according to can
With based on LabVIEW platform, develop corresponding inspection software, it is achieved the collection of local discharge signal, show, analyze, preservation etc.
Function.
Above in association with accompanying drawing, embodiments of the present invention are explained in detail, but the invention is not restricted to described enforcement
Mode.For a person skilled in the art, in the case of without departing from the principle of the invention and spirit, to these embodiments
Carry out multiple change, revise, replace and modification, still fall within protection scope of the present invention.
Claims (5)
1. a high voltage electric transmission cable on-line measuring device, it is characterised in that: include current sensor, controller unit and signal
Collecting unit；Described current sensor is arranged on the earth lead of tested high-voltage cable joint end；Described signal gathering unit
It is connected with described current sensor, for the shelf depreciation current signal of earth lead described in Real-time Collection, described controller unit
It is connected with described signal gathering unit.
A kind of high voltage electric transmission cable on-line measuring device the most according to claim 1, it is characterised in that: described high voltage power transmission
Cable on-line measuring device also includes communication unit, and described communication unit is for passing the shelf depreciation current signal of Real-time Collection
Deliver to host computer.
A kind of high voltage electric transmission cable on-line measuring device the most according to claim 1, it is characterised in that: described electric transducer
It is broadband Rogowski coil current sensor, for detecting the shelf depreciation current signal in high tension cable earth lead.
A kind of high voltage electric transmission cable on-line measuring device the most according to claim 3, it is characterised in that: described Rogowski
Coil includes closed magnetic core and winding, and described winding uniform winding is in described closed magnetic core；The pcrmeability of described closed magnetic core
Being the Ni-Zn ferrite of 200, integrating resistor is lk Ω, and umber of turn is 10 circles.
A kind of high voltage electric transmission cable on-line measuring device the most according to claim 3, it is characterised in that: each height corresponding
The earth lead of voltage cable tip side is provided with described broadband Rogowski coil current sensor, will be every by described communication module
One shelf depreciation current signal is sent to host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610784213.7A CN106124950A (en) | 2016-08-30 | 2016-08-30 | High voltage electric transmission cable on-line measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610784213.7A CN106124950A (en) | 2016-08-30 | 2016-08-30 | High voltage electric transmission cable on-line measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106124950A true CN106124950A (en) | 2016-11-16 |
Family
ID=57273258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610784213.7A Pending CN106124950A (en) | 2016-08-30 | 2016-08-30 | High voltage electric transmission cable on-line measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106124950A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405348A (en) * | 2016-08-30 | 2017-02-15 | 合肥智博电气有限公司 | Electric cable insulation detection apparatus collection system |
| CN108594096A (en) * | 2018-07-25 | 2018-09-28 | 安徽硕日光电科技有限公司 | A kind of high voltage electric transmission cable on-line measuring device |
| CN108614196A (en) * | 2018-03-29 | 2018-10-02 | 浙江工业大学之江学院 | A kind of high-voltage cable that can detect electric discharge automatically |
| CN110045229A (en) * | 2019-04-15 | 2019-07-23 | 西南交通大学 | The isolation protecting device of cable termination temperaturing lifting abnormality under a kind of electriferous state |
| CN114341654A (en) * | 2019-08-20 | 2022-04-12 | 莱姆国际股份有限公司 | ROGOWSKI current sensor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100632078B1 (en) * | 2005-06-10 | 2006-10-04 | 엘에스전선 주식회사 | Noise removing device and method for measuring partial discharge of high voltage cable |
| CN102495340A (en) * | 2011-12-06 | 2012-06-13 | 山东电力集团公司青岛供电公司 | Online power cable partial discharge monitoring system based on electromagnetic waves and high-frequency current transformer (CT) |
| CN204256093U (en) * | 2014-12-04 | 2015-04-08 | 国家电网公司 | The On-line Fault monitoring device of cable splice in a kind of 10 ~ 35kV power distribution network |
| CN204287389U (en) * | 2014-10-20 | 2015-04-22 | 国网吉林省电力有限公司长春供电公司 | High-frequency current local discharge signal pick-up transducers |
| CN204989404U (en) * | 2015-09-22 | 2016-01-20 | 袁孝红 | Cable partial discharge on -line monitoring system |
-
2016
- 2016-08-30 CN CN201610784213.7A patent/CN106124950A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100632078B1 (en) * | 2005-06-10 | 2006-10-04 | 엘에스전선 주식회사 | Noise removing device and method for measuring partial discharge of high voltage cable |
| CN102495340A (en) * | 2011-12-06 | 2012-06-13 | 山东电力集团公司青岛供电公司 | Online power cable partial discharge monitoring system based on electromagnetic waves and high-frequency current transformer (CT) |
| CN204287389U (en) * | 2014-10-20 | 2015-04-22 | 国网吉林省电力有限公司长春供电公司 | High-frequency current local discharge signal pick-up transducers |
| CN204256093U (en) * | 2014-12-04 | 2015-04-08 | 国家电网公司 | The On-line Fault monitoring device of cable splice in a kind of 10 ~ 35kV power distribution network |
| CN204989404U (en) * | 2015-09-22 | 2016-01-20 | 袁孝红 | Cable partial discharge on -line monitoring system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405348A (en) * | 2016-08-30 | 2017-02-15 | 合肥智博电气有限公司 | Electric cable insulation detection apparatus collection system |
| CN108614196A (en) * | 2018-03-29 | 2018-10-02 | 浙江工业大学之江学院 | A kind of high-voltage cable that can detect electric discharge automatically |
| CN108594096A (en) * | 2018-07-25 | 2018-09-28 | 安徽硕日光电科技有限公司 | A kind of high voltage electric transmission cable on-line measuring device |
| CN110045229A (en) * | 2019-04-15 | 2019-07-23 | 西南交通大学 | The isolation protecting device of cable termination temperaturing lifting abnormality under a kind of electriferous state |
| CN114341654A (en) * | 2019-08-20 | 2022-04-12 | 莱姆国际股份有限公司 | ROGOWSKI current sensor |
| CN114341654B (en) * | 2019-08-20 | 2024-02-06 | 莱姆国际股份有限公司 | ROGOWSKI current sensor |
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Application publication date: 20161116 |