CN111509420A - Horizontal ocean grounding electrode with roundabout arrangement - Google Patents
Horizontal ocean grounding electrode with roundabout arrangement Download PDFInfo
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- CN111509420A CN111509420A CN202010330381.5A CN202010330381A CN111509420A CN 111509420 A CN111509420 A CN 111509420A CN 202010330381 A CN202010330381 A CN 202010330381A CN 111509420 A CN111509420 A CN 111509420A
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- electrode
- island
- distribution device
- feed
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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
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
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Abstract
The invention discloses a sea horizontal grounding electrode arranged in a roundabout manner, which comprises a grounding electrode power distribution device and a grounding electrode feed electrode; the earth electrode power distribution device is arranged on the island and is electrically connected with the onshore converter station; and the earth electrode feed electrode is horizontally laid on the seabed around the island and is electrically connected with the earth electrode distribution device. The independent island is used as an earth electrode site, the diversion center is arranged on the island, and the feed electrode is fixed in the submarine channel around the island, so that the problems of difficult land site selection and inconvenient installation and maintenance of the ocean earth electrode are solved, and the method has the advantages of safety, reliability and convenient maintenance.
Description
Technical Field
The invention relates to the technical field of electrical engineering, in particular to a horizontal ocean grounding electrode arranged in a ring island for extra-high voltage direct current transmission.
Background
At present, dozens of high-voltage direct-current transmission lines are formed in China, receiving ends are concentrated, the ground is mainly concentrated in a long triangular region and a bead triangular region, the population of the region is dense, and land resources are short. In addition, the ground return grounding electrode adopted at present has great influence on the environment of peripheral facilities, so that adverse effects such as serious direct current magnetic bias of peripheral substations, overproof pipe ground voltage of pipelines of oil and gas pipelines and the like are caused. The method causes great difficulty in site selection of the newly-built direct current grounding electrode, and severely restricts the implementation of the project.
Therefore, an ocean grounding electrode technology is provided, seawater is used as a conductor for backflow, and the problems existing in the earth backflow grounding electrode can be solved. However, in the current ocean grounding pole scheme, a diversion center is usually arranged on the shore, in order to reduce the influence on shore equipment facilities, a pole rod is generally unfixed and is led into a deep sea area through a long submarine cable, the pole rod can move along with submarine water flow, the operation reliability is influenced, the pole rod needs to be fished ashore during maintenance, the operation difficulty is high, the operation and maintenance cost is high, and the exposed pole rod can also influence marine organisms.
Disclosure of Invention
In order to solve the problems, the invention provides a marine horizontal grounding electrode with a roundabout island, which has the advantages of safety, reliability and convenience in maintenance.
In order to achieve the purpose, the invention adopts the technical scheme that:
a sea horizontal type grounding electrode arranged in a roundabout manner comprises a grounding electrode power distribution device and a grounding electrode feed electrode; the earth electrode power distribution device is arranged on the island and is electrically connected with the onshore converter station; and the earth electrode feed electrode is horizontally laid on the seabed around the island and is electrically connected with the earth electrode distribution device.
Furthermore, the grounding electrode feed electrodes are multiple, and the ring islands are arranged at intervals and are respectively and electrically connected with the grounding electrode distribution device.
Furthermore, a branch framework and an insulator pillar are arranged on the bank side of the island, the top of the branch framework is connected with the grounding electrode power distribution device through an overhead line, a buried pipe or a cable trench extending to the sea surface is arranged at the lower end of the insulator pillar, and a submarine cable connected with the grounding electrode feed electrode is connected with the overhead line through the buried pipe or the cable trench and the insulator pillar.
Furthermore, seabed channels are arranged on the seabed around the island, the grounding electrode feed electrode is laid in the seabed channels, and the inner walls of the seabed channels are supported by concrete pouring.
Furthermore, a corrosion-resistant protective net is arranged at the top of the submarine channel.
Further, the surface of the ground electrode feed electrode is provided with a corrosion-resistant coating.
Compared with the prior art, the invention has the advantages that:
1. the invention utilizes the independent island as the grounding electrode address, arranges the diversion center on the island, fixes the feed electrode in the special submarine channel around the roundabout, has the depth of about 5-20 m, does not move along with the water flow, has high operation reliability, reduces the failure rate of the electrode, and is convenient for maintenance and overhaul.
2. The corrosion-resistant protective net is arranged above the special channel at the sea bottom, so that marine organisms can be prevented from invading the feed electrode, and the heat dissipation effect of seawater flowing is ensured.
3. The distribution area on the island can be led into the feed electrode in the near sea from all directions, so that the capacity of a single drainage cable can be reduced, and the complete outage caused by the fault of the single cable can be avoided.
4. The feed electrodes are distributed around the rotary island, and the length of the drainage cable between the feed electrodes and the power distribution device is only about 100-200 m, so that the investment cost can be reduced.
5. The feed electrode of the invention is flexible in arrangement, can adopt the polar rings with regular or irregular shapes, and the arrangement height of each section of polar rings can be the same as the topographic height of the sea bottom.
Drawings
FIG. 1 is a plan view of a ground electrode according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a connection of a feed electrode according to an embodiment of the present invention;
the reference numerals in the drawings mean: 1-a feed electrode; 2-corrosion-resistant protective net; 3-pipe laying or cable trench; 4-a power distribution device; 5-a submarine cable; 6-islanding; 7-sea level; 8-insulator pillars; 9-a branched framework; 10-overhead line; 11-a subsea channel; 13-wire framework.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 and 2, the marine horizontal ground electrode of the present embodiment mainly includes a feed electrode 1 and a power distribution device 4.
The power distribution device 4 is arranged on the island 6 as a current guiding center, and mainly includes a reactor, a switch, a disconnecting link, a bus, a monitoring device, and the like, which are in the prior art, and are used for distributing current to each feeding electrode 1, and the description thereof is omitted.
The island 6 is used as a grounding electrode address, and people dense areas far away from a port, a vacation beach and the like are selected as much as possible. The onshore converter station is connected to the island 6 by a high power submarine cable 5, and the land part of the island 6 is connected to the distribution equipment 4 by an overhead line 10 supported by a conductor frame 13.
The feed electrode 1 is horizontally laid in a submarine trench 11 around the island 6, and in this embodiment, the feed electrode 1 is arc-shaped and annularly surrounds the island 6.
It should be noted that the laying shape of the feed electrode 1 may be a regular shape or an irregular shape, and the laying heights of the feed electrodes 1 may be different.
Each section of feed electrode 1 can be connected end to end and then is connected with the power distribution device 4 through a cable, and under the condition that the terrain condition of an island 6 allows, each section of feed electrode 1 is preferably not connected with each other and is respectively connected into the power distribution device 4 from each direction through different cables. The multi-cable connection mode can reduce the capacity of a single drainage cable and avoid total power failure caused by the fault of the single cable.
The connection mode of the feed electrode 1 and the power distribution device 4 is as follows: the shore part adopts an overhead line 10, and the seawater part adopts a submarine cable 5; the transition between the submarine cable 5 and the overhead line 10 is made by means of a branching framework 9 and insulator supports 8, the submarine cable 5 preferably being led below the insulator supports 8 by means of a buried pipe or cable trench 3.
It will be readily appreciated that this applies equally to the connection of the power distribution unit 4 to the converter station.
The depth of the submarine channel 11 is about 5-20 m, the inner wall of the channel is supported by concrete pouring, the feeder electrode is buried in submarine soil after collapse of the two sides of the channel is prevented, and the top of the channel is provided with a corrosion-resistant protective net 2 to prevent marine organisms from contacting the feeder electrode 1.
Preferably, the surface of the feed electrode 1 is provided with a corrosion-resistant coating, such as a polymer coating, to prevent corrosion by seawater.
In conclusion, the ocean grounding electrode of the application utilizes the independent island as the grounding electrode address, arranges the diversion center on the island, and fixes the feed electrode in the submarine channel around the island, thereby effectively solving the problems in the prior art and having the advantages of high operation reliability and convenient maintenance.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (6)
1. The utility model provides an ocean horizontal grounding electrode that roundabout arranged which characterized in that: the grounding electrode power distribution device comprises a grounding electrode power distribution device and a grounding electrode feed electrode; the earth electrode power distribution device is arranged on the island and is electrically connected with the onshore converter station; and the earth electrode feed electrode is horizontally laid on the seabed around the island and is electrically connected with the earth electrode distribution device.
2. The marine horizontal earth electrode of claim 1, wherein: the ground electrode feed pole be a plurality of, ring island interval arrangement to be connected with ground electrode distribution device electricity respectively.
3. The marine horizontal earth electrode of claim 1 or 2, wherein: island bank be provided with branch's framework and insulator pillar, branch's framework top through overhead line with earthing pole distribution device link to each other, the lower extreme of insulator pillar is provided with and extends to pipe laying or the cable pit below the sea, with the submarine cable that earthing pole feeder is connected link to each other with overhead line through pipe laying or cable pit, insulator pillar.
4. The marine horizontal earth electrode of claim 1, wherein: a submarine channel is arranged on the seabed around the island, the grounding electrode feed electrode is laid in the submarine channel, and the inner wall of the submarine channel is supported by concrete pouring.
5. The marine horizontal earth electrode of claim 5, wherein: and a corrosion-resistant protective net is arranged at the top of the submarine channel.
6. The marine horizontal earth electrode of claim 1, wherein: and the surface of the ground electrode feed electrode is provided with a corrosion-resistant coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010330381.5A CN111509420B (en) | 2020-04-24 | 2020-04-24 | Horizontal ocean grounding electrode with roundabout arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010330381.5A CN111509420B (en) | 2020-04-24 | 2020-04-24 | Horizontal ocean grounding electrode with roundabout arrangement |
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| Publication Number | Publication Date |
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| CN111509420A true CN111509420A (en) | 2020-08-07 |
| CN111509420B CN111509420B (en) | 2021-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010330381.5A Active CN111509420B (en) | 2020-04-24 | 2020-04-24 | Horizontal ocean grounding electrode with roundabout arrangement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113406532A (en) * | 2021-05-21 | 2021-09-17 | 中国电力科学研究院有限公司 | Direct current grounding electrode element with state monitoring function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6242688B1 (en) * | 1996-10-28 | 2001-06-05 | Asea Brown Boveri Ab | Sea electrode for a high voltage direct current transmission system |
| CN102035082A (en) * | 2009-09-29 | 2011-04-27 | 华东电力试验研究院有限公司 | Direct current grounding system and method thereof |
| CN202034483U (en) * | 2011-03-31 | 2011-11-09 | 华东电力试验研究院有限公司 | Sea water direct current earth electrode device |
| CN102466822A (en) * | 2010-11-04 | 2012-05-23 | 中国石油天然气集团公司 | Ocean electromagnetic surveying four-pole mutual combination pole distribution method |
| CN103701493A (en) * | 2013-10-16 | 2014-04-02 | 中国电子科技集团公司第二十三研究所 | Realizing method for single-ended power supply of submarine cable transmission system with repeater through monopolar cable |
-
2020
- 2020-04-24 CN CN202010330381.5A patent/CN111509420B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6242688B1 (en) * | 1996-10-28 | 2001-06-05 | Asea Brown Boveri Ab | Sea electrode for a high voltage direct current transmission system |
| CN102035082A (en) * | 2009-09-29 | 2011-04-27 | 华东电力试验研究院有限公司 | Direct current grounding system and method thereof |
| CN102466822A (en) * | 2010-11-04 | 2012-05-23 | 中国石油天然气集团公司 | Ocean electromagnetic surveying four-pole mutual combination pole distribution method |
| CN202034483U (en) * | 2011-03-31 | 2011-11-09 | 华东电力试验研究院有限公司 | Sea water direct current earth electrode device |
| CN103701493A (en) * | 2013-10-16 | 2014-04-02 | 中国电子科技集团公司第二十三研究所 | Realizing method for single-ended power supply of submarine cable transmission system with repeater through monopolar cable |
Non-Patent Citations (2)
| Title |
|---|
| 赵亮: "《现行建筑规范实用全书》", 31 December 1999, 中国物价出版社 * |
| 黄飞航 等: "滨海滩涂输电线路接地装置抗腐蚀设计探讨", 《红水河》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113406532A (en) * | 2021-05-21 | 2021-09-17 | 中国电力科学研究院有限公司 | Direct current grounding electrode element with state monitoring function |
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| CN111509420B (en) | 2021-09-17 |
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