CN203673026U - Misplaced partial discharge model for stress cone of 10kV-cable intermediate joint - Google Patents

Misplaced partial discharge model for stress cone of 10kV-cable intermediate joint Download PDF

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Publication number
CN203673026U
CN203673026U CN201320699926.5U CN201320699926U CN203673026U CN 203673026 U CN203673026 U CN 203673026U CN 201320699926 U CN201320699926 U CN 201320699926U CN 203673026 U CN203673026 U CN 203673026U
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CN
China
Prior art keywords
cable
stress cone
layer
intermediate joint
dislocation
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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.)
Expired - Fee Related
Application number
CN201320699926.5U
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Chinese (zh)
Inventor
卢晓峰
应高亮
张波
葛爱莉
钟伟
胡铁红
王欣昱
金伟君
李文斐
徐志斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Red Phase Ltd By Share Ltd
State Grid Corp of China SGCC
Jinhua Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Original Assignee
XIAMEN RED PHASE INSTRUMENTS Inc
State Grid Corp of China SGCC
Jinhua Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by XIAMEN RED PHASE INSTRUMENTS Inc, State Grid Corp of China SGCC, Jinhua Power Supply Co of State Grid Zhejiang Electric Power Co Ltd filed Critical XIAMEN RED PHASE INSTRUMENTS Inc
Priority to CN201320699926.5U priority Critical patent/CN203673026U/en
Application granted granted Critical
Publication of CN203673026U publication Critical patent/CN203673026U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The objective of the utility model is to provide a misplaced partial discharge model for a stress cone of a 10kV-cable intermediate joint. A common XLPE cable is directly made into a model which can truly reflect exposed defects of the cable intermediate joint in processes of manufacture, installation and operation under the condition that the safety is guaranteed. In order to solve the above problems, the model provided by the utility model comprises two cables which are connected together. A shielding layer, an outer conducting layer, a main insulating layer, an inner conducting layer and an exposed copper core of each cable is stripped. The stripped part of each cable is sleeved by a stress cone. The fracture of the outer conducting layer of one cable extends out of the corresponding stress cone, thereby forming 5mm malposition. Compared with the prior art, the model enables a defect part to be made in an actual cable intermediate joint, can truly reflect the exposed representative defects in quality, characteristics and discharge principles of the cable intermediate joint in the process of manufacture, installation and operation.

Description

10kV cable intermediate joint stress cone dislocation shelf depreciation model
Technical field
The utility model relates to field of power, relates in particular to 10kV cable intermediate joint stress cone dislocation shelf depreciation model.
Background technology
XLPE cable is widely used in transmission line of electricity with its excellent performance, but cable is made length generally below 1km, need cable intermediate joint to connect, therefore cable intermediate joint is the important component part of power cable, but be also the multiple position of transmission line of electricity accident, its reliability directly affects the security of electric power system simultaneously.In installation process, because misoperation may be introduced number of drawbacks in cable accessory, annex is caused to serious damage at the scene.The partial discharge quantity of cable and its insulation status are closely related, and the variation of partial discharge quantity is indicating that cable insulation may exist the defect of harm cable running safety.
To this, existing for the problem for such, best settling mode is that a kind of physical model of design is specialized in.Also can be convenient to staff and practise issue handling mode simultaneously.
At present, cable intermediate joint insulation defect flash-over characteristic has been carried out to large quantity research both at home and abroad, but the research of most of typical defect flash-over characteristic not to carry out on actual cable joint, variant with true flash-over characteristic in joint.And if really choose one section of defective cable, can not guarantee the security of this model.Therefore how under the prerequisite of safety, to simulate more truly 10kV cable intermediate joint stress cone dislocation shelf depreciation model and just become a difficult problem.
Utility model content
The purpose of this utility model is to provide a kind of 10kV cable intermediate joint stress cone dislocation shelf depreciation model, common XLPE cable is directly made into, can be at the model of guaranteeing truly to reflect safe in the situation that cable intermediate joint comes out in manufacturing installation and operation process.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:
10kV cable intermediate joint stress cone dislocation shelf depreciation model, comprises two cables that link together, and described cable is successively peeled off screen layer, outer conducting layer, main insulating layer, inner conducting layer, exposes copper core; The copper core of two cables is connected by aluminium hydraulic pressed connecting pipe, and described copper core and aluminium hydraulic pressed connecting pipe outside are surrounded by semiconduction jacket layer, and described cable is stripped part outside and is arranged with stress cone, and wherein the outer semiconducting layer fracture of a cable stretches out at least 5mm formation dislocation of stress cone.
Preferably, described semiconduction jacket layer is semiconduction adhesive tape.Such structure is comparatively easily wrapped up.
Preferably, described semiconduction jacket layer is semiconduction garment bag.Garment bag is specialized equipment, and it is more convenient than semiconduction adhesive tape to use, but can only be for a kind of model.
Preferably, described semiconduction adhesive tape is wrapping to the screen layer of another root cable from the screen layer of a cable.Such wrapping is guaranteed, with minimum material, to guarantee to wrap up effect.
Preferably, described main insulating layer intersection and main insulating layer surface are also coated with a watt gram silicone grease layer.A watt gram silicone grease layer can play resistant to elevated temperatures flame retardant effect, also can strengthen bonding effect simultaneously.
Preferably, the outer semiconducting layer fracture of a described wherein cable stretches out stress cone 30mm formation dislocation.
Preferably, described screen layer, outer conducting layer, the stepped distribution of main insulating layer.Such structure is convenient to find respective layer in manufacturing process, can not make mistakes.
Preferably, the exposed division length of described screen layer, outer conducting layer, main insulating layer is identical.Such design mainly for structure attractive in appearance.
Compared with prior art, the utility model 10kV cable intermediate joint stress cone dislocation shelf depreciation model is chosen at the inner people of real cable intermediate joint for making a rejected region, can truly and safely reflect that cable intermediate joint is at character, feature and the discharge mechanism of manufacturing the representative defect coming out in installation and operation process, realize effective extraction that characteristic quantity is put in typical defect office, the local discharge characteristic amount that well dislocation of research stress cone forms, provides basis in kind to carrying out cable intermediate joint Partial Discharge Detection.
Accompanying drawing explanation
Fig. 1 is the one-piece construction schematic diagram after the utility model 10kV cable intermediate joint stress cone dislocation shelf depreciation model cable is pushed aside on request.
Fig. 2 is the one-piece construction schematic diagram of the utility model 10kV cable intermediate joint stress cone dislocation shelf depreciation model.
Embodiment
10kV cable intermediate joint stress cone dislocation shelf depreciation model, comprises two cables 1 that link together, and described cable 1 is successively peeled off screen layer 11, outer semiconducting layer 12, main insulating layer 13, inner conducting layer 14, exposes copper core 2; The copper core 2 of two cables 1 is connected by aluminium hydraulic pressed connecting pipe 3, described copper core 2 and aluminium hydraulic pressed connecting pipe 3 outsides are surrounded by semiconduction jacket layer 4, described cable 1 is stripped part outside and is arranged with stress cone 5, and wherein outer semiconducting layer 12 fractures of a cable 1 stretch out at least 5mm formation dislocation of stress cone.
Described semiconduction jacket layer 4 is semiconduction adhesive tape or semiconduction garment bag.Described semiconduction adhesive tape is wrapping to the screen layer 11 of another root cable 1 from the screen layer of a cable 1.Described main insulating layer 13 intersections and main insulating layer 13 surfaces are also coated with a watt gram silicone grease layer.Outer semiconducting layer 12 fractures of a described wherein cable 1 stretch out stress cone 30mm and form dislocation.Described screen layer 11, outer semiconducting layer 12, the stepped distribution of main insulating layer 13
The exposed division length of described screen layer 11, outer semiconducting layer 12, main insulating layer 13 is identical.
In the normal manufacturing process of 10kV cable intermediate joint stress cone, stress cone 5 ends should with the tight crimping of cable outer semiconducting layer 12 fracture, be guarantee installation quality, stress cone 5 relative positions all leave certain surplus.If but do not note, make outer semiconducting layer 12 fractures in one end stretch out stress cone 5 afterbodys, will produce electric field and concentrate, produce creepage phenomenon in interface, thereby cause shelf depreciation.The partial discharge quantity that cable intermediate joint stress cone dislocation defect produces is very large, comparatively serious to the damage of cable splice built-in electrical insulation performance.And the 10kV cable intermediate joint stress cone of the utility model made dislocation shelf depreciation model, logical upper 10kV alternating current, after diel, stops energising, cuts stress cone 5 positions open, just can see the burnt trace in a place or many places of obvious radius 1-5 centimetre.By the analysis to short-circuit conditions, can recognize under the different occasions stress cone 5 different consequences of bringing under different angles that misplace.Also can simulate the damage situation under rainy day or other rugged surroundings simultaneously.Research process only needs an AC power and remote control switch and a spacious experimental site just can realize.Compared with other schemes of the prior art, saving and safe and reliable.
It is enough large in order to ensure the shelf depreciation situation after simulation conduction when the utility model is made, stretching out stress cone 25-35mm formation dislocation at the fracture of outer semiconducting layer 12, is convenient to observe, and still guarantees again safety.If this distance is too small, under the alternating current effect of 10kV, just can detect that possibly there is burnt trace inside week more than 2.The excessive electric spark that may directly occur of this spacing by this section of cable bad, causes danger simultaneously.
The foregoing is only specific embodiment of the utility model, but technical characterictic of the present utility model is not limited to this, any those skilled in the art is in field of the present utility model, and the variation of doing or modification are all encompassed among the scope of the claims of the present utility model.

Claims (8)

1.10kV cable intermediate joint stress cone dislocation shelf depreciation model, it is characterized in that, comprise two cables (1) that link together, described cable (1) is successively peeled off screen layer (11), outer semiconducting layer (12), main insulating layer (13), inner conducting layer (14), exposes copper core (2); The copper core (2) of two cables (1) is connected by aluminium hydraulic pressed connecting pipe (3), described copper core (2) and aluminium hydraulic pressed connecting pipe (3) outside are surrounded by semiconduction jacket layer (4), described cable (1) is stripped part outside and is arranged with stress cone (5), and wherein outer semiconducting layer (12) fracture of a cable (1) stretches out at least 5mm formation dislocation of stress cone.
2. 10kV cable intermediate joint stress cone dislocation shelf depreciation model according to claim 1, is characterized in that, described semiconduction jacket layer (4) is semiconduction adhesive tape.
3. 10kV cable intermediate joint stress cone dislocation shelf depreciation model according to claim 1, is characterized in that, described semiconduction jacket layer (4) is semiconduction garment bag.
4. 10kV cable intermediate joint stress cone dislocation shelf depreciation model according to claim 2, it is characterized in that, described semiconduction adhesive tape is wrapping to the screen layer (11) of another root cable (1) from the screen layer of a cable (1).
5. 10kV cable intermediate joint stress cone dislocation shelf depreciation model according to claim 1, is characterized in that, described main insulating layer (13) intersection and main insulating layer (13) surface are also coated with a watt gram silicone grease layer.
6. 10kV cable intermediate joint stress cone dislocation shelf depreciation model according to claim 1, is characterized in that, outer semiconducting layer (12) fracture of a described wherein cable (1) stretches out stress cone 30mm and forms dislocation.
7. according to wherein arbitrary described 10kV cable intermediate joint stress cone dislocation shelf depreciation model of claim 1-6, it is characterized in that described screen layer (11), outer semiconducting layer (12), the stepped distribution of main insulating layer (13).
8. 10kV cable intermediate joint stress cone dislocation shelf depreciation model according to claim 7, is characterized in that, the exposed division length of described screen layer (11), outer semiconducting layer (12), main insulating layer (13) is identical.
CN201320699926.5U 2013-11-06 2013-11-06 Misplaced partial discharge model for stress cone of 10kV-cable intermediate joint Expired - Fee Related CN203673026U (en)

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CN201320699926.5U CN203673026U (en) 2013-11-06 2013-11-06 Misplaced partial discharge model for stress cone of 10kV-cable intermediate joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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CN203673026U true CN203673026U (en) 2014-06-25

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103630807A (en) * 2013-11-06 2014-03-12 国家电网公司 Partial discharge model for staggering of stress cone of 10kV cable intermediate joint
CN104065020A (en) * 2014-07-11 2014-09-24 国家电网公司 Medium-voltage cable accessory defect model based on RTV coatings
CN104078876A (en) * 2014-07-11 2014-10-01 国家电网公司 Medium voltage cable and accessory defect treatment method based on RTV coatings

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103630807A (en) * 2013-11-06 2014-03-12 国家电网公司 Partial discharge model for staggering of stress cone of 10kV cable intermediate joint
CN103630807B (en) * 2013-11-06 2017-01-18 国家电网公司 Partial discharge model for staggering of stress cone of 10kV cable intermediate joint
CN104065020A (en) * 2014-07-11 2014-09-24 国家电网公司 Medium-voltage cable accessory defect model based on RTV coatings
CN104078876A (en) * 2014-07-11 2014-10-01 国家电网公司 Medium voltage cable and accessory defect treatment method based on RTV coatings
CN104065020B (en) * 2014-07-11 2016-08-17 国家电网公司 A kind of midium voltage cable adnexa defect model based on RTV coating
CN104078876B (en) * 2014-07-11 2016-09-07 国家电网公司 A kind of midium voltage cable annex defect handling method based on RTV coating

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CP01 Change in the name or title of a patent holder

Address after: 100045 West Chang'an Avenue, Beijing, No. 86, No.

Co-patentee after: Jinhua Power Supply Company, State Grid Zhejiang Electric Power Company

Patentee after: State Grid Corporation of China

Co-patentee after: Red phase Limited by Share Ltd

Address before: 100045 West Chang'an Avenue, Beijing, No. 86, No.

Co-patentee before: Jinhua Power Supply Company, State Grid Zhejiang Electric Power Company

Patentee before: State Grid Corporation of China

Co-patentee before: Xiamen Red Phase Instruments Inc.

CP01 Change in the name or title of a patent holder
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140625

Termination date: 20191106

CF01 Termination of patent right due to non-payment of annual fee