CN109116200B - High-voltage cable insulation joint with built-in very high frequency partial discharge sensing device - Google Patents
High-voltage cable insulation joint with built-in very high frequency partial discharge sensing device Download PDFInfo
- Publication number
- CN109116200B CN109116200B CN201811016874.0A CN201811016874A CN109116200B CN 109116200 B CN109116200 B CN 109116200B CN 201811016874 A CN201811016874 A CN 201811016874A CN 109116200 B CN109116200 B CN 109116200B
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- Prior art keywords
- partial discharge
- high frequency
- frequency partial
- protective
- sensing device
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Links
- 238000009413 insulation Methods 0.000 title claims abstract description 38
- 230000001681 protective effect Effects 0.000 claims abstract description 98
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 11
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000006978 adaptation Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 210000001503 joint Anatomy 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000007689 inspection Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000004576 sand Substances 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R31/00—Coupling parts supported only by co-operation with counterpart
- H01R31/06—Intermediate parts for linking two coupling parts, e.g. adapter
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/20—Connectors or connections adapted for particular applications for testing or measuring purposes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a high-voltage cable insulation joint with a built-in very high frequency partial discharge sensing device, which comprises the following components: very high frequency partial discharge sensing device that can be respectively with first protective sheath and second protective sheath adaptation fastening as an organic whole, very high frequency partial discharge sensing device includes: an insulating ring; the very high frequency partial discharge sensor is arranged in the insulating ring and connected with the insulating ring into a whole, and a binding post of the very high frequency partial discharge sensor is exposed outside the insulating ring; clamping positions capable of respectively fastening the insulating ring and the binding posts on the assembly connection ends; and the adapter component is arranged on the second protective shell. The high-voltage cable insulating joint with the built-in very high frequency partial discharge sensing device can solve the problem that the internal defects of the high-voltage cable insulating joint cannot be found in time due to undetected attenuation caused by long-distance propagation of a very high frequency partial discharge signal; the structural arrangement is more compact, and the maintenance, repair and control cost are facilitated.
Description
Technical Field
The invention relates to the field of electric appliances, in particular to a high-voltage cable insulation joint with a built-in very high frequency partial discharge sensing device.
Background
In the prior art, the partial discharge parameter is one of important indexes of the health state of the high-voltage cable insulation joint.
When the very high frequency method is adopted for partial discharge detection, the signal propagation attenuation is obviously increased along with the increase of the distance due to weaker very high frequency partial discharge signals, meanwhile, the partial discharge signals in the high-voltage cable insulation joint are emitted from the inside to reach the outside space, and the signal intensity is weakened by penetrating through the same-screen shielding layer and the insulation material; in addition, when the high-voltage cable insulation joint is laid in the trench, sand filling and protection cover plate protection are adopted, so that a tiny very high frequency partial discharge signal is difficult to detect outside the actual high-voltage cable insulation joint of the cable line. Therefore, how to find out the very high frequency partial discharge signal inside the high voltage cable insulation joint earlier, so as to find out the defect earlier is one of the problems to be solved in the field of high voltage cable insulation joints.
Disclosure of Invention
The invention aims to solve the technical problem that the invention provides the high-voltage cable insulation joint with the built-in very high frequency partial discharge sensing device, which can solve the problems that the detection is not carried out due to long-distance propagation attenuation of a very high frequency partial discharge signal, and the internal defect of the high-voltage cable insulation joint cannot be found in time; the structural arrangement is more compact, and the maintenance, repair and control cost are facilitated.
In order to solve the above technical problems, an embodiment of the present invention provides a high voltage cable insulation connector with a built-in vhf partial discharge sensing device, including: a first protective case; a second protective shell which is detachably and adaptively connected to the first protective shell, wherein a cavity for a cable to pass through is formed in the first protective shell and the second protective shell which are assembled; the first protective sleeve and the second protective sleeve can be respectively sleeved on the cable in the cavity, and the end parts of the first protective sleeve and the second protective sleeve are respectively provided with an assembly connecting end; very high frequency partial discharge sensing device that can be respectively with first protective sheath and second protective sheath adaptation fastening as an organic whole, very high frequency partial discharge sensing device includes: an insulating ring; the very high frequency partial discharge sensor is arranged in the insulating ring and connected with the insulating ring into a whole, and a binding post of the very high frequency partial discharge sensor is exposed outside the insulating ring; clamping positions capable of respectively fastening the insulating ring and the binding posts on the assembly connection ends; install the adapter subassembly on the second protective housing, wherein: connecting the very high frequency partial discharge sensing device, the first protective sleeve and the second protective sleeve into a whole through the fit connection of the assembly connection end and the clamping position, and connecting the binding post on the adapter component for signal external connection; a prefabricated straight-through device is arranged between the cable inside the first protective sleeve, the second protective sleeve and the very high frequency partial discharge sensing device which are connected into a whole and the cable inside the cavity; the prefabricated through-piece device comprises: the device comprises a conductor connecting pipe, a shielding cover, a semi-conductive belt, a copper shielding net, a thermal shrinkage sleeve, copper binding wires and soldering tin;
the very high frequency partial discharge sensing device, the first protective sleeve and the second protective sleeve are connected into a whole and then sleeved outside the prefabricated straight-through device.
Wherein the assembly connecting end is provided with a plurality of through holes, and the clamping positions are a plurality of screw holes; the number and the positions of the through holes provided with the assembly connecting ends and the screw holes provided with the clamping positions are in one-to-one correspondence.
Wherein, still include: a coaxial cable connection line, the coaxial cable connection line comprising: the wire body is arranged at one end of the wire body and is used for being connected with a wiring lug on the wiring terminal and an SMA connector arranged at the other end of the wire body.
Wherein, assemble the rubber pad between first protective housing and the second protective housing.
Wherein the first protective shell and the second protective shell are respectively made of glass fiber reinforced plastic
The high-voltage cable insulating joint with the built-in very high frequency partial discharge sensing device has the following beneficial effects:
the first and the very high frequency partial discharge sensing devices are fixedly connected with the first protective sleeve and the second protective sleeve in an adapting way, the very high frequency partial discharge sensing devices are arranged in the high-voltage cable insulation joints, and the problems that the internal defects of the high-voltage cable insulation joints cannot be found in time due to undetected signals transmitted and attenuated in long distance are solved; the method can find tiny partial discharge defects early and eliminate defects early, effectively avoids faults caused by expansion of the partial discharge defects of the high-voltage insulating connector, and is a powerful technical guarantee for safe and reliable operation of the high-voltage cable line.
Secondly, the structural design is more simplified, the arrangement is more compact, and the maintenance, repair and control cost are facilitated.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a blasting structure of a high-voltage cable insulation joint with a built-in vhf partial discharge sensor according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the vhf partial discharge sensor according to the embodiment of the present invention, which is adapted to be fastened together with the first protective sleeve and the second protective sleeve.
Fig. 3 is a schematic diagram of a blasting structure of the vhf partial discharge sensor according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of an assembly structure of a vhf partial discharge sensor according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of an assembling position of an adapter assembly according to an embodiment of the invention.
Fig. 6 is a schematic structural diagram of an adapter assembly according to a first view angle of an embodiment of the invention.
Fig. 7 is a schematic structural diagram of an adapter assembly according to a second view angle of the present invention.
Fig. 8 is a schematic structural diagram of a coaxial cable connection wire according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1-8 show a first embodiment of the insulation joint for a high-voltage cable with a built-in vhf partial discharge sensor according to the present invention.
As shown in fig. 1-2, the high-voltage cable insulation joint with the built-in vhf partial discharge sensing device in the embodiment can connect the vhf partial discharge sensing device arranged inside the high-voltage cable insulation joint to an external inspection vhf partial discharge detector, so as to realize high-sensitivity vhf partial discharge detection of the high-voltage cable insulation joint, and the high-voltage cable insulation joint can be applied to a high-voltage cable straight-through joint with a voltage level of 110kV and above.
The high-voltage cable insulation joint in this embodiment includes: a first protective case 11; a second protective shell 12 detachably and adaptively connected to the first protective shell 11, wherein the first protective shell 11 and the second protective shell 12 are assembled with each other and provided with a chamber T for the cable A to pass through; the first protective sleeve 13 and the second protective sleeve 14 which can be respectively sleeved on the cable a in the cavity T, and the ends of the first protective sleeve 13 and the second protective sleeve 14 are respectively provided with assembly connection ends 132 and 142. The very high frequency partial discharge sensing device 2 which can be respectively matched and fixedly connected with the first protective sleeve 13 and the second protective sleeve 14 into a whole is arranged in the high-voltage cable insulation joint.
The very high frequency partial discharge sensing device 2 includes: an insulating ring 21; the very high frequency partial discharge sensor 22 is arranged inside the insulating ring 21 and connected with the insulating ring 21 into a whole, and a wiring terminal 221 of the very high frequency partial discharge sensor 22 is exposed outside the insulating ring 21; the insulating ring 21 together with the terminal 221 can be fastened to the clamping locations 24 on the mounting connection ends 132, 142, respectively.
An adapter assembly 3 mounted on a second protective housing 12, wherein: the vhf partial discharge sensing device 2, the first protective sleeve 13 and the second protective sleeve 14 are connected into a whole through the fitting connection ends 132 and 142 and the fitting connection of the clamping position 24, and the binding post 221 is connected to the adapter assembly 3 for signal external connection.
In specific implementation, the first protective shell 11 and the second protective shell 12 are two half-shell structures, and are respectively glass fiber reinforced plastic protective shells with certain hardness, so that good protective performance can be achieved. The first protective shell 11 and the second protective shell 12 are assembled in a butt joint mode and are columnar, and a cavity T is formed inside the first protective shell and the second protective shell for the cable A to pass through.
The cable a comprises in this embodiment a cable body A1 and a prefabricated through-piece arrangement A2 fastened outside the cable body A1. The prefabricated straight-through device A2 in the present embodiment includes: conductor connecting pipe, shield cover, semi-conductive area, copper shielding net, pyrocondensation cover, copper binding line, structure such as soldering tin. It will be appreciated that: the very high frequency partial discharge sensing device 2, the first protective sleeve 13 and the second protective sleeve 14 are connected into a whole and then sleeved outside the prefabricated straight-through device A2.
Further, a rubber gasket 15 is provided when the first protective case 11 and the second protective case 12 are assembled, so that the sealing insulating property is ensured. In a preferred embodiment, a waterproof sealing tape may be further provided at the end where the first protective case 11 and the second protective case 12 are assembled.
The first protective sleeve 13 and the second protective sleeve 14 are copper sleeves, the structures and the sizes of the two components are approximately the same, and the assembly arrangement is approximately symmetrical. The first protective sleeve 13 and the second protective sleeve 14 can be respectively assembled and connected with the very high frequency partial discharge sensing device 2.
As shown in fig. 3 to 4, the vhf partial discharge sensing device 2 is assembled inside the high voltage cable insulation joint, and the vhf partial discharge sensing device 2 includes: an insulating ring 21; the very high frequency partial discharge sensor 22 is arranged inside the insulating ring 21 and connected with the insulating ring 21 into a whole, and a wiring terminal 221 of the very high frequency partial discharge sensor 22 is exposed outside the insulating ring 21; the insulating ring 21 together with the terminal 221 can be fastened to the clamping locations 24 on the mounting connection ends 132, 142, respectively.
In particular, the insulating ring 21 has a ring-like structure and is made of an epoxy resin material. The vhf partial discharge sensor 22 includes two semicircular structural members 22a and 22b made of copper, and the terminal 221 is respectively disposed at the ends of the two semicircular structural members 22a and 22 b. The vhf partial discharge sensor 22 is integrally formed with the insulating ring 21 and is not detachable, and the post 221 of the vhf partial discharge sensor 22 is exposed outside the insulating ring 21.
In this embodiment, the assembly connection ends 132 and 142 are through holes, the clamping locations 24 are screw holes, and the number and positions of the through holes of the assembly connection ends 132 and 142 and the screw holes of the clamping locations 24 are in one-to-one correspondence, so that rapid assembly is facilitated, and disassembly is realized.
In a specific assembly process, a certain number of connecting pieces, such as bolts K, respectively pass through the assembly connecting ends 132, 142 and are fastened in the screw holes of the clamping positions 24 in a one-to-one correspondence manner, so as to realize the assembly of the vhf partial discharge sensing device 2, the first protective sleeve 13 and the second protective sleeve 14.
Further, as shown in fig. 5-7, the second protective housing 12 is further provided with an adapter component 3, and the adapter component 3 has the following functions: the very high frequency partial discharge sensing device of the high voltage cable insulation joint is connected to an external inspection very high frequency partial discharge detector, so that the detection of the very high frequency partial discharge of the high voltage cable insulation joint is realized.
In particular, the adaptor assembly 3 comprises: a guard ring 31 mounted on a protective case of a high voltage cable insulation joint and an adapter 32 provided on a protective case 12 inside the guard ring 31, wherein: the adapter 32 has a first connector 321 which can be assembled inside the protective housing and is used for connecting the very high frequency partial discharge sensing device 2 of the high voltage cable insulation connector, and a second connector 322 which is positioned outside the protective housing and is used for connecting an external inspection very high frequency partial discharge detector.
The guard ring 31 functions as: the protection ring 31 is provided with wire outlet grooves 311 at two sides to prevent damage during transportation and installation, so as to facilitate wiring. In other embodiments, the protection ring 31 may be filled with an encapsulation adhesive for encapsulation protection.
The adapter 32 in this embodiment is an N/SMA-KKF adapter, the first connector 321 is an SMA connector (female) capable of being connected to the coaxial cable connection wire 4 in an adapting manner, and the second connector 322 is an N/SMA-KKF connection port.
In particular, the adaptor 32 may be fastened on the second protective housing 12 by a threaded locking manner, and meanwhile, the adaptor 32 on one side of the first connector 321 is sleeved with an O-ring 323, so as to enhance the sealing insulation.
Further, the connection of the vhf partial discharge sensing device 2 inside the high voltage cable insulation connector to the adaptor 32 may be performed by the coaxial cable connection 4.
As shown in fig. 8, in the present embodiment, the coaxial cable connecting wire 4 includes: a wire body 41, a wire lug 42 arranged at one end of the wire body 41 and used for being connected with a wire post 221, and an SMA connector 43 arranged at the other end of the wire body 41. The connection between the lug 42 and the post 221 may be by screw locking, and the SMA connector 43 is an SMA connector (male) adapted to the SMA connector (female) of the adaptor 32, with an impedance of 50Ω.
When the high-voltage cable insulating joint with the built-in very high frequency partial discharge sensing device is in specific implementation, the function of the built-in very high frequency partial discharge sensor can be realized by replacing parts and assembling. For example: the second protective housing 12 with the adapter assembly 3 is replaced for an adapter fitting installation with the first protective housing 11 according to the assembly method described above. First, the vhf partial discharge sensing device 2 is assembled inside the insulated connector of the high voltage cable by using the connectors, such as bolts K, passing through the assembly connection ends 132, 142 respectively and being fastened in the screw holes of the clamping locations 24 in a one-to-one correspondence manner, to assemble the vhf partial discharge sensing device 2, the first protective sleeve 13 and the second protective sleeve 14. Then, the very high frequency partial discharge sensing device 2 is connected with the first connector 321 of the adapter 32 by adopting the coaxial cable connecting wire 4, so as to realize signal external connection. Finally, the external inspection very high frequency partial discharge detector is connected with the second connector 322 of the adapter 32, so that the high-sensitivity very high frequency partial discharge detection of the high-voltage cable insulation connector is realized.
The high-voltage cable insulating joint with the built-in very high frequency partial discharge sensing device has the following beneficial effects:
the first and the very high frequency partial discharge sensing devices are fixedly connected with the first protective sleeve and the second protective sleeve in an adapting way, the very high frequency partial discharge sensing devices are arranged in the high-voltage cable insulation joints, and the problems that the internal defects of the high-voltage cable insulation joints cannot be found in time due to undetected signals transmitted and attenuated in long distance are solved; the method can find tiny partial discharge defects early and eliminate defects early, effectively avoids faults caused by expansion of the partial discharge defects of the high-voltage insulating connector, and is a powerful technical guarantee for safe and reliable operation of the high-voltage cable line.
Secondly, the structural design is more simplified, the arrangement is more compact, and the maintenance, repair and control cost are facilitated.
Claims (5)
1. The utility model provides a high tension cable insulation joint of sensor device is put in built-in very high frequency office which characterized in that includes:
a first protective case;
a second protective shell detachably and adaptively connected to the first protective shell, wherein a cavity for a cable to pass through is formed in the first protective shell and the second protective shell which are assembled;
the first protective sleeve and the second protective sleeve can be respectively sleeved on the cable in the cavity, and the end parts of the first protective sleeve and the second protective sleeve are respectively provided with an assembly connecting end;
the very high frequency partial discharge sensing device can be respectively and fixedly connected with the first protective sleeve and the second protective sleeve in an adapting way, and the very high frequency partial discharge sensing device comprises: an insulating ring; the very high frequency partial discharge sensor is arranged inside the insulating ring and connected with the insulating ring into a whole, and a binding post of the very high frequency partial discharge sensor is exposed outside the insulating ring; and clamping positions capable of respectively fastening the insulating ring and the binding posts on the assembly connection end;
install the adapter subassembly on the second protective housing, wherein: the very high frequency partial discharge sensing device, the first protective sleeve and the second protective sleeve are connected into a whole through the fit connection of the fit connection end and the clamping position, and the binding post is connected to the adapter component for signal external connection;
a prefabricated straight-through device is arranged between the cable inside the first protective sleeve, the second protective sleeve and the very high frequency partial discharge sensing device which are connected into a whole and the cable inside the cavity; the prefabricated through-piece device comprises: the device comprises a conductor connecting pipe, a shielding cover, a semi-conductive belt, a copper shielding net, a thermal shrinkage sleeve, copper binding wires and soldering tin;
the very high frequency partial discharge sensing device, the first protective sleeve and the second protective sleeve are connected into a whole and then sleeved outside the prefabricated straight-through part device.
2. The high-voltage cable insulation joint with the built-in very high frequency partial discharge sensing device according to claim 1, wherein the assembly connection end is provided with a plurality of through holes, and the clamping position is provided with a plurality of screw holes;
the through holes provided with the assembly connecting ends are in one-to-one correspondence with the number and the positions of the screw holes provided with the clamping positions.
3. The high voltage cable insulation joint incorporating a vhf partial discharge sensing apparatus of claim 2 further comprising: a coaxial cable connection line, the coaxial cable connection line comprising: the wire body is arranged at one end of the wire body and is used for being connected with a wiring lug on the wiring post and an SMA connector arranged at the other end of the wire body.
4. The high voltage cable insulation joint incorporating a vhf partial discharge sensing apparatus according to claim 2, wherein a rubber pad is fitted between the first protective case and the second protective case.
5. The high voltage cable insulation joint with built-in vhf partial discharge sensing apparatus according to claim 2, wherein the first protective case and the second protective case are glass fiber reinforced plastic protective cases, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811016874.0A CN109116200B (en) | 2018-09-03 | 2018-09-03 | High-voltage cable insulation joint with built-in very high frequency partial discharge sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811016874.0A CN109116200B (en) | 2018-09-03 | 2018-09-03 | High-voltage cable insulation joint with built-in very high frequency partial discharge sensing device |
Publications (2)
| Publication Number | Publication Date |
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| CN109116200A CN109116200A (en) | 2019-01-01 |
| CN109116200B true CN109116200B (en) | 2024-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811016874.0A Active CN109116200B (en) | 2018-09-03 | 2018-09-03 | High-voltage cable insulation joint with built-in very high frequency partial discharge sensing device |
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| CN (1) | CN109116200B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110707653A (en) * | 2019-09-30 | 2020-01-17 | 南方电网科学研究院有限责任公司 | High-voltage cable insulation joint with built-in capacitive electrode |
| CN110940895A (en) * | 2019-12-17 | 2020-03-31 | 四川赛康智能科技股份有限公司 | Cable joint explosion-proof fire-extinguishing and temperature, partial discharge comprehensive on-line monitoring device |
| CN112462204B (en) * | 2020-10-19 | 2023-07-07 | 深圳供电局有限公司 | Cable intermediate head partial discharge detection device and on-line monitoring system |
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