CN111682500A - 35kV separable connector for offshore wind power - Google Patents
35kV separable connector for offshore wind power Download PDFInfo
- Publication number
- CN111682500A CN111682500A CN202010599048.4A CN202010599048A CN111682500A CN 111682500 A CN111682500 A CN 111682500A CN 202010599048 A CN202010599048 A CN 202010599048A CN 111682500 A CN111682500 A CN 111682500A
- Authority
- CN
- China
- Prior art keywords
- wind power
- offshore wind
- connector
- tube
- accommodating space
- 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.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
- H02G15/184—Cable junctions protected by sleeves, e.g. for communication cable with devices for relieving electrical stress
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/007—Devices for relieving mechanical stress
Landscapes
- Connector Housings Or Holding Contact Members (AREA)
Abstract
The invention relates to the technical field of cable accessories and provides a 35kV separable connector for offshore wind power. The method comprises the following steps: the connector comprises a connector body, wherein a T-shaped shifting head insulating layer, a first accommodating space and a second accommodating space are arranged in the connector body; a connecting bolt and an insulating plug are arranged in the first accommodating space, the connecting bolt is connected with the insulating plug, and an end cover arranged at the end part of the connector body is arranged at one side of the insulating plug; a terminal is arranged in the second accommodating space, one end of the terminal is connected with the connecting bolt in the first accommodating space, a cable conductor is arranged inside the other end of the terminal, a cable insulating layer is arranged outside the cable conductor, and a stress control tube is further arranged between the cable insulating layer and the connector body. The invention has the beneficial effects that: the stress control tube, the cable insulating layer and the T-shaped pull head insulating layer are prefabricated into a whole, so that the interfaces of the separable device are reduced, and the probability of accidents is reduced.
Description
Technical Field
The invention relates to the technical field of cable accessories, in particular to a 35kV separable connector for offshore wind power.
Background
Renewable energy is receiving more and more attention worldwide as the important contradiction between the increasing demand of modern energy and the worsening of living environment is increased. Wind energy is increasingly regarded as a pollution-free and renewable high-efficiency clean new energy, while offshore wind power has advantages that onshore wind power does not have and is widely concerned by countries in the world, and offshore wind power is developed gradually and maturely as a new technology in recent decades.
Compared with land wind power, the energy benefit of offshore wind power resources is higher than that of land wind power plants, the offshore wind power resources also have the advantages of no land resource, high wind speed, less sand and dust, large electric quantity, stable operation, zero dust emission and the like, meanwhile, the abrasion of the wind turbine generator is greatly reduced, the service life is prolonged, the offshore wind power generation system is suitable for large-scale development, and the offshore wind power is huge in quantity and huge in potential.
At present, the boost of offshore wind farms in China generally adopts a two-stage boost mode, namely, after the output voltage 690V of a wind turbine is boosted to 35kV through a box transformer, the output voltage is converged to a 110kV or 220kV booster station through a submarine cable respectively, and finally the output voltage is connected to a power grid through a 110kV or 220kV line.
Offshore wind power is often affected by harsh natural environments, complex geographical locations, difficult transportation, and the like, and the operating and maintenance costs are prohibitive. In order to adapt to the offshore wind power operation environment, the cable accessories are required to have safety, reliability, maintainability, supportability, environmental adaptability and the like, and the performance of the cable accessories for common civil and onshore wind power cannot meet the offshore wind power operation requirement.
The cable accessories for the offshore wind power are imported French and German products at present, no domestic product is available, the control of the installation size is extremely strict in the installation process, even extremely small deviation can cause great influence on the installation quality of the accessories, and the installation technology entrance threshold is high, so that great trouble is brought to the installation of the cable accessories for the offshore wind power.
In order to meet the development requirement of the offshore wind power market, the invention develops the 35kV separable connector suitable for the offshore wind power operation environment.
Disclosure of Invention
The invention aims to provide a 35kV separable connector for offshore wind power, which aims to solve the technical problems in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: a separable connector of 35kV for offshore wind power, includes: the connector comprises a connector body, wherein a T-shaped shifting head insulating layer, a first accommodating space and a second accommodating space are arranged in the connector body; a connecting bolt and an insulating plug are arranged in the first accommodating space, the connecting bolt is connected with the insulating plug, and an end cover arranged at the end part of the connector body is arranged at one side of the insulating plug; a terminal is arranged in the second accommodating space, one end of the terminal is connected with the connecting bolt in the first accommodating space, a cable conductor is arranged in the other end of the terminal, a cable insulating layer is arranged outside the cable conductor, and a stress control tube is arranged between the cable insulating layer and the connector body; the stress control tube, the cable insulating layer and the T-shaped pull head insulating layer are prefabricated into a whole.
In an alternative embodiment, the stress control tube is a nonlinear resistance tube-stress composite tube.
In an optional embodiment, the lower end of the connector body is provided with a self-curing waterproof insulating sealant, and a heat-shrinkable sealing tube is arranged outside the self-curing waterproof insulating sealant and extends to the outer wall of the connector body.
In an optional embodiment, a ground wire sealing sleeve is further arranged outside the heat-shrinkable sealing tube, and the ground wire penetrates out along the ground wire sealing sleeve.
In an optional embodiment, the nonlinear resistance tube-stress composite tube is made of silicon rubber.
In an optional embodiment, a nut and a gasket which are used for matching with the connecting bolt are further arranged in the first accommodating space, and the connecting bolt, the nut and the gasket are made of demagnetized stainless steel.
In an optional embodiment, the insulating plug is made of epoxy resin and copper; the end cover is made of semi-conductive liquid silicon rubber.
In an optional embodiment, the material of the thermal shrinkage sealing tube and the ground wire sealing sleeve is halogen-free flame-retardant polyolefin; the self-curing waterproof sealant is made of polyolefin and silicon rubber.
In an alternative embodiment, the surface of the terminal is silver plated.
The invention has the beneficial effects that:
(1) the stress control tube in the 35kV separable connector for offshore wind power is prefabricated with the cable insulating layer and the T-shaped pull head insulating layer into a whole, and the interface of the separable connector is reduced and the accident probability is reduced by 50% by adopting an integration technology.
(2) The stress control tube in the 35kV separable connector for offshore wind power is a nonlinear resistance tube-stress tube composite tube, so that an electric field can be uniformly controlled, and the influence of field intensity concentration on cables and cable accessories is reduced.
(3) The length of the stress control part in the 35kV separable connector for offshore wind power is far greater than that of the stress cone type, so that dimension errors caused by stress displacement can be avoided, and the risk of later-stage operation is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a 35kV separable connector for offshore wind power according to an embodiment of the present invention.
Wherein, the reference numbers in the figures are: 1. the cable comprises a connecting bolt, 2, an insulating plug, 3, an end cover, 4, a terminal, 5, a cable conductor, 6, a T-shaped plug insulating layer, 7, a cable insulating layer, 8, a nonlinear resistor tube-stress composite tube, 9, a thermal shrinkage sealing tube, 10, a self-curing waterproof insulating sealant, 11, a ground wire sealing tube, 12, a ground wire, 13, a first accommodating space, 14 and a second accommodating space.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
Referring to fig. 1, an object of the present embodiment is to provide a 35kV separable connector for offshore wind power, including: the connector comprises a connector body, wherein a T-shaped plug insulating layer 6, a first accommodating space 13 and a second accommodating space 14 are arranged in the connector body.
Specifically, a connecting bolt 1 and an insulating plug 2 are arranged in the first accommodating space 13, the connecting bolt 1 is connected with the insulating plug 2, an end cover 3 mounted at the end part of the connector body is arranged at one side of the insulating plug 2, and the insulating plug 2 is made of epoxy resin and copper; the end cover 3 is made of semi-conductive liquid silicon rubber; a nut and a gasket used in cooperation with the connecting bolt 1 are further disposed in the first receiving space 13, and preferably, the connecting bolt 1, the nut and the gasket are made of demagnetized stainless steel.
In this embodiment, a terminal 4 is disposed in the second accommodating space 14, the surface of the terminal 4 is plated with silver, one end of the terminal 4 is connected to the connecting bolt 1 in the first accommodating space 13, a cable conductor 5 is disposed inside the other end of the terminal 4, a cable insulating layer 7 is disposed outside the cable conductor, and a stress control tube is further disposed between the cable insulating layer 7 and the connector body, wherein the stress control tube is a nonlinear resistance tube-stress composite tube 8, the nonlinear resistance tube-stress composite tube 8 adopts silicon rubber as a main material, and the nonlinear resistance tube-stress composite tube 8 can uniformly control an electric field, thereby reducing the influence of field intensity concentration on cables and cable accessories. When the stress tube and the nonlinear resistance material composite tube 8 are used as the stress control tube, the potential distribution change along the main insulating surface of the cable is more gradual, and the electric field axial distribution at the main insulating surface of the separable connector can be effectively and uniformly distributed because the slope of the potential curve is the axial component of the electric field intensity.
When the electric field intensity is increased, the resistance value is sharply reduced, which is beneficial to the smooth conduction of the induced charges, and when the electric field intensity is reduced, the resistance value is increased to play an insulation protection role; in the same time, the stress tube and the nonlinear resistance material composite tube 8 play a role in capacitance voltage division, and the concentration of the main insulation field of the cable is effectively reduced.
It should be noted that the stress control tube is prefabricated with the cable insulation layer 7 and the T-type tap insulation layer 6. By adopting the integration technology, the interface of the separable connector is reduced, the electric field intensity and the axial field intensity at the boundary of the main insulating surface of the separable connector and air are effectively reduced, the possibility of partial discharge along the surface of the separable connector is reduced, and the probability of accidents is reduced by 50%.
In the prior art, when the sleeve and the stress cone are installed in a split mode (the stress cone is installed firstly, the sleeve is installed later), the stress cone which is installed in place is affected by friction force between the sleeve and the stress cone, the stress cone can move along with the sleeve, the movement is uncontrollable, the moving distance is unmeasurable, the length of a straight part of the stress cone is only 30mm, the length of the straight part of the stress cone can be reduced by any movement of the stress cone, and uncertainty is brought to the installation quality of a separator. In the embodiment, the stress control tube, the cable insulating layer 7 and the T-shaped pulling head insulating layer 6 are prefabricated into a whole, the installation is carried out simultaneously, the sequence does not exist, the phenomenon that the stress cone installed firstly moves along with the stress cone due to the fact that the sleeve is installed later is avoided, meanwhile, the length of the stress tube in the embodiment is 200mm, and the margin of the installation size is far larger than that of a traditional stress cone type separator.
In addition, the lower end part of the connector body is provided with a self-curing waterproof insulating sealant 10, a heat-shrinkable sealing tube 9 is arranged outside the self-curing waterproof insulating sealant 10, and the heat-shrinkable sealing tube 9 extends to the outer wall of the connector body; and a ground wire sealing sleeve 11 is arranged outside the heat-shrinkable sealing tube 9, and a ground wire 12 penetrates out along the ground wire sealing sleeve 11. Specifically, the connector body is a T-shaped plug head, the junction of the T-shaped plug head and the cable is filled with self-curing waterproof sealant 10, and a heat-shrinkable sealing tube 9 is installed at the junction of the T-shaped plug head and the cable; the ground wire sealing sleeve 11 is arranged at the joint of the thermal shrinkage sealing tube 9 and the cable, and extends the ground wire 12 out of the special outlet; it is worth mentioning that the material of the thermal shrinkage sealing tube 9 and the ground wire sealing sleeve 11 is halogen-free flame-retardant polyolefin; the self-curing waterproof sealant 10 is made of polyolefin and silicon rubber. The connector in the embodiment can work in high-salt-mist and high-humidity environment for a long time, and brings great improvement to the characteristics of cable accessories such as electrical property, mechanical property, weather resistance, salt-mist resistance, moisture resistance, durability and maintainability.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A separable connector of 35kV for offshore wind power, includes: the connector comprises a connector body, wherein a T-shaped shifting head insulating layer (6), a first accommodating space (13) and a second accommodating space (14) are arranged in the connector body;
a connecting bolt (1) and an insulating plug (2) are arranged in the first accommodating space (13), the connecting bolt (1) is connected with the insulating plug (2), and an end cover (3) mounted at the end part of the connector body is arranged at one side of the insulating plug (2);
a terminal (4) is arranged in the second accommodating space (14), one end of the terminal (4) is connected with the connecting bolt (1) in the first accommodating space (13), a cable conductor (5) is arranged in the other end of the terminal (4), a cable insulating layer (7) is arranged outside the cable conductor, and a stress control tube is arranged between the cable insulating layer (7) and the connector body;
the method is characterized in that: the stress control tube, the cable insulating layer (7) and the T-shaped pull head insulating layer (6) are prefabricated into a whole.
2. 35kV separable connector for offshore wind power according to claim 1, characterized in that the stress control tube is a nonlinear resistance tube-stress composite tube (8).
3. The 35kV separable connector for offshore wind power as recited in claim 1, wherein the lower end of the connector body is provided with a self-curing waterproof insulating sealant (10), a heat-shrinkable sealing tube (9) is arranged outside the self-curing waterproof insulating sealant (10), and the heat-shrinkable sealing tube (9) extends to the outer wall of the connector body.
4. The 35kV separable connector for offshore wind power as claimed in claim 3, wherein a ground wire sealing sleeve (11) is further arranged outside the heat-shrinkable sealing tube (9), and a ground wire (12) penetrates out along the ground wire sealing sleeve (11).
5. The separable connector of 35kV for offshore wind power according to claim 2, characterized in that the nonlinear resistance tube-stress composite tube (8) is made of silicon rubber as a main material.
6. The 35kV separable connector for offshore wind power according to claim 1, wherein a nut and a gasket used with the connecting bolt (1) are further arranged in the first accommodating space (13), and the connecting bolt (1), the nut and the gasket are made of demagnetized stainless steel.
7. The 35kV separable connector for offshore wind power as claimed in claim 1, wherein the insulating plug (2) is made of epoxy resin + copper; the end cover (3) is made of semi-conductive liquid silicon rubber.
8. The 35kV separable connector for offshore wind power as claimed in claim 4, wherein the material of the heat-shrinkable sealing tube (9) and the ground wire sealing sleeve (11) is halogen-free flame-retardant polyolefin; the self-curing waterproof sealant (10) is made of polyolefin and silicon rubber.
9. 35kV separable connector for offshore wind power according to claim 1, characterized in that the surface of the terminal (4) is silver plated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010599048.4A CN111682500B (en) | 2020-06-28 | 2020-06-28 | 35kV separable connector for offshore wind power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010599048.4A CN111682500B (en) | 2020-06-28 | 2020-06-28 | 35kV separable connector for offshore wind power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111682500A true CN111682500A (en) | 2020-09-18 |
| CN111682500B CN111682500B (en) | 2022-05-06 |
Family
ID=72437220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010599048.4A Active CN111682500B (en) | 2020-06-28 | 2020-06-28 | 35kV separable connector for offshore wind power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111682500B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563843A (en) * | 2020-11-26 | 2021-03-26 | 江南造船(集团)有限责任公司 | Grounding and protection method for multi-core electric connector |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69109060D1 (en) * | 1990-11-20 | 1995-05-24 | Toshiba Kawasaki Kk | Connectors for line cables. |
| CN1279827A (en) * | 1997-11-28 | 2001-01-10 | Abb股份有限公司 | Power induction device |
| CN1808774A (en) * | 2005-12-23 | 2006-07-26 | 广东长园电缆附件有限公司 | Separable combined connector for power cables |
| CN201608494U (en) * | 2009-12-29 | 2010-10-13 | 浙江恒坤电力技术有限公司 | Bulk shielding plug-in type terminal |
| CN103038965A (en) * | 2010-05-21 | 2013-04-10 | Abb研究有限公司 | A high voltage direct current cable termination apparatus |
| CN103715647A (en) * | 2012-10-09 | 2014-04-09 | 泰科电子(上海)有限公司 | Cold shrinking type terminal for power cable |
| CN104804295A (en) * | 2015-04-09 | 2015-07-29 | 深圳市沃尔核材股份有限公司 | Electrical stress control hot melting composition and control element provided with hot melting interface |
| CN206422504U (en) * | 2016-12-30 | 2017-08-18 | 镇江丹高电力科技有限公司 | Separable connector for power cable |
| CN207218211U (en) * | 2017-09-15 | 2018-04-10 | 长缆电工科技股份有限公司 | One kind ± 500kV direct current cables Integral prefabricated type middle joints |
| CN208571568U (en) * | 2018-08-20 | 2019-03-01 | 长园电力技术有限公司 | A kind of cable accessory |
-
2020
- 2020-06-28 CN CN202010599048.4A patent/CN111682500B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69109060D1 (en) * | 1990-11-20 | 1995-05-24 | Toshiba Kawasaki Kk | Connectors for line cables. |
| CN1279827A (en) * | 1997-11-28 | 2001-01-10 | Abb股份有限公司 | Power induction device |
| CN1808774A (en) * | 2005-12-23 | 2006-07-26 | 广东长园电缆附件有限公司 | Separable combined connector for power cables |
| CN201608494U (en) * | 2009-12-29 | 2010-10-13 | 浙江恒坤电力技术有限公司 | Bulk shielding plug-in type terminal |
| CN103038965A (en) * | 2010-05-21 | 2013-04-10 | Abb研究有限公司 | A high voltage direct current cable termination apparatus |
| CN103715647A (en) * | 2012-10-09 | 2014-04-09 | 泰科电子(上海)有限公司 | Cold shrinking type terminal for power cable |
| CN104804295A (en) * | 2015-04-09 | 2015-07-29 | 深圳市沃尔核材股份有限公司 | Electrical stress control hot melting composition and control element provided with hot melting interface |
| CN206422504U (en) * | 2016-12-30 | 2017-08-18 | 镇江丹高电力科技有限公司 | Separable connector for power cable |
| CN207218211U (en) * | 2017-09-15 | 2018-04-10 | 长缆电工科技股份有限公司 | One kind ± 500kV direct current cables Integral prefabricated type middle joints |
| CN208571568U (en) * | 2018-08-20 | 2019-03-01 | 长园电力技术有限公司 | A kind of cable accessory |
Non-Patent Citations (2)
| Title |
|---|
| 国家职业资格培训教材研究组: "《电工技能与实训》", 30 September 2006 * |
| 钟海杰 等: "用于抑制界面空间电荷的直流电缆附件设计", 《高电压技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563843A (en) * | 2020-11-26 | 2021-03-26 | 江南造船(集团)有限责任公司 | Grounding and protection method for multi-core electric connector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111682500B (en) | 2022-05-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111682500B (en) | 35kV separable connector for offshore wind power | |
| CN207218211U (en) | One kind ± 500kV direct current cables Integral prefabricated type middle joints | |
| CN203326312U (en) | Converging cable for photovoltaic power generation system | |
| CN210110445U (en) | 126kV thin-rod-diameter porcelain insulator | |
| CN207184012U (en) | A kind of extra large cable protects tubular construction | |
| CN206834350U (en) | The heteromorphic connector main body of cable intermediate joint and its cable intermediate joint of composition | |
| CN201750032U (en) | Integrated wire harness of photovoltaic power supply | |
| CN201252387Y (en) | 10kV power cable tapping box capable of realizing cable butting | |
| CN201360056Y (en) | Socket assembly for solar photovoltaic electricity generating system | |
| CN201369197Y (en) | High-voltage bushing used for boosting transformer of wind-driven generator | |
| CN217362547U (en) | Sea and land cable crossover sub subassembly | |
| WO2020237723A1 (en) | Alternating-current and direct-current hybrid submarine cable for offshore wind power | |
| CN203760200U (en) | Tubular busbar | |
| CN204216548U (en) | The light unit of 110kV power transmission sequence OPPC wire directly draws lower device | |
| CN204559078U (en) | A kind of waterproof stress cone | |
| CN206075892U (en) | A kind of group string inverter square formation trench type wire harness | |
| CN204596465U (en) | Low wind speed wind energy generating set special cable | |
| CN204669306U (en) | A kind of photovoltaic component connector | |
| CN218242774U (en) | Sea-land cable conversion device suitable for multi-loop medium-voltage sea cable landing condition | |
| CN221126864U (en) | Cable terminal tower capable of directly climbing tower by using converging cable in distributed new energy power plant area | |
| CN202976979U (en) | Submarine photoelectric composite cable | |
| CN216623845U (en) | Anti-oxidation wire and cable for photovoltaic power generation | |
| CN108376987A (en) | A kind of offshore boosting station dynamic reactive compensation device | |
| CN219123874U (en) | Distribution connection structure of office station | |
| CN202276127U (en) | Reinforced seal oil-filling type outdoor terminal |
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 |