CN110780166B - Partial discharge detection system for medium-voltage cable - Google Patents
Partial discharge detection system for medium-voltage cable Download PDFInfo
- Publication number
- CN110780166B CN110780166B CN201911087673.4A CN201911087673A CN110780166B CN 110780166 B CN110780166 B CN 110780166B CN 201911087673 A CN201911087673 A CN 201911087673A CN 110780166 B CN110780166 B CN 110780166B
- Authority
- CN
- China
- Prior art keywords
- glass fiber
- partial discharge
- voltage cable
- detection system
- microprocessor
- 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.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 239000003365 glass fiber Substances 0.000 claims abstract description 53
- 238000009413 insulation Methods 0.000 claims abstract description 10
- 230000009471 action Effects 0.000 claims description 22
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 238000009826 distribution Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 230000006978 adaptation Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000275 quality assurance Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Images
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 relates to a partial discharge detection system of a medium-voltage cable, which comprises an operating rod, a connecting component and a glass fiber rod, wherein the operating rod is provided with a horizontal through hole and is detachably arranged at one end of the connecting component; the invention has the advantages that: the contact head of the glass fiber rod is in contact with the insulation outside of the cable terminal, so that the state of partial discharge inside the cable is transmitted into the sensor through the insulation layer and the glass fiber rod, the sensor transmits the received signal to the microprocessor for analysis and processing, and the glass fiber rod can not only ensure enough insulation strength, but also transmit ultrasonic signals of ultrasonic waves, thereby achieving the live detection of the distribution network cable terminal, ensuring that the partial discharge quantity of the medium-voltage cable terminal can be accurately tested, and not affecting the normal operation of a circuit; and reliable quality guarantee is obtained in the debugging and acceptance process.
Description
Technical Field
The invention relates to a partial discharge detection system for a medium-voltage cable.
Background
With the acceleration of power grid construction, especially the increase of cable construction investment, power distribution network accidents caused by cable faults frequently occur. The partial discharge is one of the main reasons for cable damage, and the insulation structure of the cable terminal is complex, so that the insulation performance of the cable terminal is affected by a plurality of reasons, and the fault hidden trouble is easily left on site due to poor manufacturing process, and the fault rate is far higher than that of the cable body. Therefore, the local discharge detection of the cable terminal is the key point of the cable state detection.
The detection is often indirectly gone on through the detection to the cubical switchboard in current medium voltage cable office, and the main problem who exists is: 1. there are many external strong electromagnetic field interference sources; 2. the detected cable partial discharge signal is very weak, and the cable partial discharge condition cannot be accurately judged; 3. the partial discharge detection of the cable is not completely carried out, and a blank exists.
Disclosure of Invention
The invention aims to provide a partial discharge detection system for a medium-voltage cable, which can effectively overcome electromagnetic interference and carry out testing under the condition of no power failure.
In order to solve the technical problems, the invention is realized by the following technical scheme: the utility model provides a medium voltage cable partial discharge detecting system, the glass fiber pole that includes action bars, coupling assembling and sound wave signal conduction, be equipped with the horizontal through-hole with glass fiber pole looks adaptation on the action bars, action bars detachable installs the one end at coupling assembling, the glass fiber pole sets up the other end at coupling assembling, the one end of glass fiber pole is equipped with the contact head with the insulating planking contact of cable terminal, be equipped with the sensor that links to each other with the glass fiber pole on the coupling assembling, be connected with microprocessor on the sensor, be equipped with power supply in the action bars, power supply links to each other with sensor, microprocessor respectively, be connected with the PC on the microprocessor.
Preferably, the contact head and the glass fiber rod are of an integrated structure.
Preferably, the microprocessor is connected with a PC through an RS232 interface.
Preferably, coupling assembling includes outer sleeve, interior sleeve pipe and fixed axle all set up on outer sleeve's inside wall, and the horizontal axis of interior sleeve pipe and fixed axle does not coincide, glass fiber pole fixed connection is intraductal at interior sleeve, the action bars passes through the screw thread detachable and installs on the fixed axle.
Preferably, a circuit board for fixing the sensor is arranged in the outer sleeve, the circuit board is arranged between the inner sleeve and the fixed shaft, and the microprocessor is arranged on the circuit board.
Preferably, the horizontal through hole is provided with an internal thread, and the fixing shaft is provided with an external thread matched with the internal thread.
Preferably, the glass fiber rod is provided with a boss extending outwards, and the boss is provided with a fixed ring groove for installing the operating rod.
Preferably, a display connected with the microprocessor is further arranged on the operating rod.
Preferably, the other end of the horizontal through hole is provided with a fixing cover for fixing a power supply, and the fixing power supply is arranged in the horizontal through hole.
In conclusion, the invention has the advantages that: the contact head of the glass fiber rod is in contact with the insulation outside of the cable terminal, so that the state of partial discharge inside the cable is transmitted into the sensor through the insulation layer and the glass fiber rod, the sensor transmits the received signal to the microprocessor for analysis and processing, and the glass fiber rod can not only ensure enough insulation strength, but also transmit ultrasonic signals of ultrasonic waves, thereby achieving the live detection of the distribution network cable terminal, ensuring that the partial discharge quantity of the medium-voltage cable terminal can be accurately tested, and not affecting the normal operation of a circuit; reliable quality assurance can be obtained in the debugging and acceptance process, the expected target is required to be achieved, secondly, the operating rod and the glass fiber rod are connected through the connecting component, the operation safety distance of operators can be ensured in the glass fiber rod detection process, the detection safety performance is improved, the stable power supply of the sensor and the microprocessor can be realized by the arrangement of a power supply, the continuous work of the sensor and the microprocessor is ensured, the operation is simple, the arrangement of a PC (personal computer) can transmit data processed by the microprocessor to the PC for storage, the subsequent reading and analysis are convenient, finally, the operating rod and the connecting component are detachably connected, the operating rod and the connecting component can be separated under the condition that the whole system is not used, and the operating rod is sleeved on the glass fiber rod through the matching of a horizontal through hole of the operating rod and the glass fiber rod, so that the length of the whole medium voltage cable partial discharge detection system is shortened, the glass fiber rod protection device is favorable for detection personnel to carry, can also effectively protect the glass fiber rod, and prevents the glass fiber rod from being damaged.
Drawings
The invention is further described below with reference to the accompanying drawings:
fig. 1 is a schematic structural diagram of a partial discharge detection system for a medium voltage cable according to the present invention;
FIG. 2 is a schematic view of a connecting assembly according to the present invention;
fig. 3 is a schematic structural diagram of a partial discharge detection system for a medium voltage cable according to the present invention when carried.
Reference numerals:
the device comprises an operating rod 1, a horizontal through hole 10, a fixing cover 11, a horizontal transverse plate 12, a connecting assembly 2, an outer sleeve 21, a first inner sleeve 22, a second inner sleeve 23, a circuit board 24, a glass fiber rod 3, a contact 31, a lug boss 32, a fixing ring groove 33, a sensor 4, a microprocessor 5, a power supply 6, a PC 7 and a display 8.
Detailed Description
As shown in fig. 1, fig. 2, fig. 3, a medium voltage cable partial discharge detecting system, including action bars 1, coupling assembling 2 and acoustic signal conduction's glass fiber pole 3, be equipped with the horizontal through-hole 10 with 3 looks adaptations of glass fiber pole on the action bars 1, the one end at coupling assembling 2 is installed to action bars 1 detachable, glass fiber pole 3 sets up the other end at coupling assembling 2, the one end of glass fiber pole 3 is equipped with the contact 31 with the insulating planking contact of cable terminal, be equipped with the sensor 4 who links to each other with glass fiber pole 3 on coupling assembling 2, be connected with microprocessor 5 on the sensor 4, be equipped with power supply 6 in the action bars 1, power supply 6 links to each other with sensor 4, microprocessor 5 respectively, be connected with PC 7 on the microprocessor 5.
The contact head 31 of the glass fiber rod 3 is in contact with the insulated outside of the cable terminal, so that the state of partial discharge in the cable is transmitted into the sensor 4 through the glass fiber rod 3 through the insulating layer, the sensor 4 transmits the received signal to the microprocessor 5 for analysis and processing, and the glass fiber rod 3 can not only ensure enough insulating strength, but also transmit ultrasonic signals of ultrasonic waves, so that the electrified detection of the distribution network cable terminal is achieved, the partial discharge quantity of the medium-voltage cable terminal can be accurately tested, and the normal operation of a line is not influenced; reliable quality assurance can be obtained in the debugging and acceptance process, the expected target is required to be achieved, secondly, the operating rod 1 is connected with the glass fiber rod 3 through the connecting component 2, the operation safety distance of an operator can be ensured in the detection process of the glass fiber rod 3, the detection safety performance is improved, the power supply 6 is arranged, the stable power supply of the sensor 4 and the microprocessor 5 can be realized, the continuous work of the sensor 4 and the microprocessor 5 is ensured, the operation is simple, the PC 7 is arranged, the data processed by the microprocessor 5 can be transmitted to the PC 7 for storage, the subsequent reading and analysis are convenient, finally, the operating rod 1 and the connecting component 2 are arranged to be detachably connected, under the condition that the whole body is not used, the operating rod 1 can be separated from the connecting component 2 and is matched with the glass fiber rod 3 through the horizontal through hole 10 of the operating rod 1, make the sleeve of action bars 1 establish on glass fiber pole 3 to shorten the length of whole medium voltage cable partial discharge detecting system, be favorable to the measurement personnel to carry, also can effectively protect glass fiber pole 3, prevent glass fiber pole 3's damage.
Contact 31 and 3 formula structures as an organic whole of glass fiber pole can simplify the mounting process of contact 31 and glass fiber pole 3, have improved the joint strength of contact 31 and glass fiber pole 3, avoid droing of contact 31 in the testing process, have improved detection quality, microprocessor 5 links to each other with PC 7 through the RS232 interface, can improve signal transmission's stability.
The connecting assembly 2 comprises an outer sleeve 21, an inner sleeve 22 and a fixed shaft 23, the inner sleeve 22 and the fixed shaft 23 are both arranged on the inner side wall of the outer sleeve 21, and the horizontal axis of the inner sleeve 22 is not coincident with the horizontal axis of the fixed shaft 23, the glass fiber rod 3 is fixedly connected in the inner sleeve 22, the operating rod 1 is detachably arranged on the fixed shaft 23 through threads, so that the operating rod 1 and the glass fiber rod 3 are not on the same axis, the flexibility in operation is improved, a circuit board 24 for fixing the sensor 4 is arranged in the outer sleeve 21, the circuit board 24 is arranged between the inner sleeve 22 and the fixed shaft 23, and the microprocessor 5 is arranged on the circuit board 24, the damage of the circuit board 24 can be reduced, the circuit board 24 is prevented from being exposed in the air, the service life of the circuit board 24 is prolonged, and the connection structure of the sensor 4 and the glass fiber rod 3 can be simplified.
Be equipped with the internal thread on the horizontal through-hole 10, be equipped with the external screw thread with internal thread looks adaptation on the fixed axle 23, threaded connection is reliable, and the installation is dismantled conveniently, can ensure the straightness accuracy of during operation action bars 1, prevents radially rocking of action bars 1, be equipped with the boss 32 of outside extension on the glass fiber pole 3, be equipped with the fixed annular 33 of installation action bars 1 on the boss 32, can realize that 1 cover of action bars is established outside glass fiber pole 3, in addition, improve the fixed quality of action bars 1, prevent to carry droing of in-process action bars 1, can set up the screw at boss 32 and be used for locking action bars 1.
Still be equipped with the display 8 that links to each other with microprocessor 5 on the action bars 1, the setting of display 8 can show measuring result in the front of operating personnel, and the operating personnel of being convenient for reads measuring result, in this embodiment, in order to improve the stationarity of display 8, display 8 passes through horizontal diaphragm 12 and installs on action bars 1, be equipped with fixed power supply 6's fixed lid 11 on action bars 1, and fixed power supply 6 sets up in horizontal through-hole 10, and the setting of fixed lid 11 is favorable to power supply 6's installation fixed, and the change of power supply 6 of being convenient for, and power supply 6 in this embodiment is the dry battery, can prevent in dust or debris granule from getting into action bars 1 moreover.
Other embodiments of the present invention than the preferred embodiments described above will be apparent to those skilled in the art from the present invention, and various changes and modifications can be made therein without departing from the spirit of the present invention as defined in the appended claims.
Claims (8)
1. A partial discharge detection system for a medium voltage cable is characterized in that: the cable terminal insulation outer plate contact device comprises an operating rod, a connecting assembly and a glass fiber rod conducting sound wave signals, wherein a horizontal through hole matched with the glass fiber rod is formed in the operating rod, the operating rod is detachably mounted at one end of the connecting assembly, the glass fiber rod is arranged at the other end of the connecting assembly, a contact head in contact with a cable terminal insulation outer plate is arranged at one end of the glass fiber rod, a sensor connected with the glass fiber rod is arranged on the connecting assembly, a microprocessor is connected onto the sensor, a power supply source is arranged in the operating rod and is respectively connected with the sensor and the microprocessor, and a PC is connected onto the microprocessor;
coupling assembling includes outer sleeve, interior sleeve pipe and fixed axle all set up on outer sleeve's inside wall, and the horizontal axis of interior sleeve pipe and fixed axle does not coincide, glass fiber pole fixed connection is intraductal at interior sleeve, the action bars passes through the screw thread detachable and installs on the fixed axle.
2. A medium voltage cable partial discharge detection system according to claim 1, characterized in that: the contact head and the glass fiber rod are of an integrated structure.
3. A medium voltage cable partial discharge detection system according to claim 1, characterized in that: and the microprocessor is connected with a PC (personal computer) through an RS232 interface.
4. A medium voltage cable partial discharge detection system according to claim 1, characterized in that: a circuit board for fixing the sensor is arranged in the outer sleeve, the circuit board is arranged between the inner sleeve and the fixed shaft, and the microprocessor is arranged on the circuit board.
5. A medium voltage cable partial discharge detection system according to claim 1, characterized in that: an internal thread is arranged at one end of the horizontal through hole, and an external thread matched with the internal thread is arranged on the fixing shaft.
6. A medium voltage cable partial discharge detection system according to claim 5, characterized in that: the glass fiber rod is provided with a boss extending outwards, and the boss is provided with a fixed ring groove for installing the operating rod.
7. A medium voltage cable partial discharge detection system according to claim 1, characterized in that: and a display connected with the microprocessor is also arranged on the operating rod.
8. A medium voltage cable partial discharge detection system according to claim 1, characterized in that: the other end of the horizontal through hole is provided with a fixing cover for fixing a power supply, and the power supply is arranged in the horizontal through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911087673.4A CN110780166B (en) | 2019-11-08 | 2019-11-08 | Partial discharge detection system for medium-voltage cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911087673.4A CN110780166B (en) | 2019-11-08 | 2019-11-08 | Partial discharge detection system for medium-voltage cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110780166A CN110780166A (en) | 2020-02-11 |
| CN110780166B true CN110780166B (en) | 2022-01-25 |
Family
ID=69389796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911087673.4A Active CN110780166B (en) | 2019-11-08 | 2019-11-08 | Partial discharge detection system for medium-voltage cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110780166B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002018963A1 (en) * | 2000-08-29 | 2002-03-07 | Siemens Limited | Re-locatable partial discharge transducer head |
| CN201499735U (en) * | 2009-09-19 | 2010-06-09 | 杨占圆 | Crank umbrella |
| CN201662603U (en) * | 2009-12-03 | 2010-12-01 | 上海市电力公司 | Acoustoelectric combined sensor |
| CN204166000U (en) * | 2014-09-11 | 2015-02-18 | 深圳供电局有限公司 | Extension rod of ultrasonic electrified partial discharge tester sensor |
| CN205157712U (en) * | 2015-10-20 | 2016-04-13 | 国网青海省电力公司检修公司 | Insulating telescopic link detection device is put in combined electrical apparatus office |
| CN205910295U (en) * | 2016-06-30 | 2017-01-25 | 张一帆 | Novel GIS equipment partial discharge detector device |
| CN207992384U (en) * | 2018-03-28 | 2018-10-19 | 江苏省江都水利工程管理处 | Shelf depreciation detection device |
-
2019
- 2019-11-08 CN CN201911087673.4A patent/CN110780166B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002018963A1 (en) * | 2000-08-29 | 2002-03-07 | Siemens Limited | Re-locatable partial discharge transducer head |
| CN201499735U (en) * | 2009-09-19 | 2010-06-09 | 杨占圆 | Crank umbrella |
| CN201662603U (en) * | 2009-12-03 | 2010-12-01 | 上海市电力公司 | Acoustoelectric combined sensor |
| CN204166000U (en) * | 2014-09-11 | 2015-02-18 | 深圳供电局有限公司 | Extension rod of ultrasonic electrified partial discharge tester sensor |
| CN205157712U (en) * | 2015-10-20 | 2016-04-13 | 国网青海省电力公司检修公司 | Insulating telescopic link detection device is put in combined electrical apparatus office |
| CN205910295U (en) * | 2016-06-30 | 2017-01-25 | 张一帆 | Novel GIS equipment partial discharge detector device |
| CN207992384U (en) * | 2018-03-28 | 2018-10-19 | 江苏省江都水利工程管理处 | Shelf depreciation detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110780166A (en) | 2020-02-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110441576B (en) | High-voltage cable sheath circulation monitoring device and fault positioning method | |
| KR101007629B1 (en) | Wireless acoustic emission sensor module based on magnetic power, on-Line partial discharge measurement system using the sensor, and their method | |
| CN108871491B (en) | Intelligent oil level meter for transformer bushing | |
| CN109406032B (en) | A kind of cable accessory interfacial pressure online testing device | |
| CN107907806B (en) | Bus voltage measuring device based on GIS basin-type insulator distributed capacitance | |
| CN112067946A (en) | Cable sheath fault monitoring device and method for broadcasting synchronous signals by multiple Rogowski coils | |
| CN106384896B (en) | A kind of electric meter earthing or grounding means | |
| CN110780166B (en) | Partial discharge detection system for medium-voltage cable | |
| CN105510785A (en) | Suspension insulator low and zero resistance data wireless measurer | |
| CN201600439U (en) | Generator state monitoring system based on virtual instrument and wireless sensor network | |
| CN210199238U (en) | Intelligent sensor integrating monitoring of leakage current and partial discharge of sleeve | |
| CN211236101U (en) | Partial discharge detection device for medium-voltage cable | |
| CN116047240A (en) | Switch cabinet partial discharge detection device based on ozone and ultrasonic combined detection | |
| CN210664586U (en) | Cubical switchboard state monitoring sensor subassembly | |
| CN212622907U (en) | Transformer partial discharge thing networking monitoring devices | |
| CN110703050B (en) | Method for accurately positioning fault point in GIL (gate in line) voltage withstand test | |
| CN208156084U (en) | Insulator surface conductivity monitoring device and power transmission line monitoring system | |
| CN112034319A (en) | Improved generation ultrasonic wave partial discharge detection device | |
| CN112557963A (en) | Fault detection ring suitable for extra-high voltage conductor | |
| CN207301238U (en) | The electrical integrated sensor of built-in optical for insulation defect detection | |
| CN206321560U (en) | A kind of close on-Line Monitor Device of Substation Insulator salt | |
| CN204989286U (en) | Ring -opening hall current sensor | |
| CN218272561U (en) | Intelligent sensing online monitoring device for state of transformer reactor | |
| CN213091800U (en) | Improved generation ultrasonic wave partial discharge detection device | |
| CN220691041U (en) | GIS equipment partial discharge on-line measuring equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |