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WO2010120035A1 - Procédé de bypass sans coupure pour ligne d'alimentation souterraine utilisant un coude de rallonge présentant une fonction de communication interrompue - Google Patents

Procédé de bypass sans coupure pour ligne d'alimentation souterraine utilisant un coude de rallonge présentant une fonction de communication interrompue Download PDF

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Publication number
WO2010120035A1
WO2010120035A1 PCT/KR2010/000239 KR2010000239W WO2010120035A1 WO 2010120035 A1 WO2010120035 A1 WO 2010120035A1 KR 2010000239 W KR2010000239 W KR 2010000239W WO 2010120035 A1 WO2010120035 A1 WO 2010120035A1
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WO
WIPO (PCT)
Prior art keywords
transformer
cable
switch
elbow
bypass
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.)
Ceased
Application number
PCT/KR2010/000239
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English (en)
Korean (ko)
Inventor
권세원
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.)
Daewon Electric Co Ltd
Original Assignee
Daewon Electric 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 Daewon Electric Co Ltd filed Critical Daewon Electric Co Ltd
Publication of WO2010120035A1 publication Critical patent/WO2010120035A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H02G9/00—Installations of electric cables or lines in or on the ground or water
    • H02G9/06—Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor
    • 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
    • H02G9/00—Installations of electric cables or lines in or on the ground or water
    • H02G9/02—Installations of electric cables or lines in or on the ground or water laid directly in or on the ground, river-bed or sea-bottom; Coverings therefor, e.g. tile
    • 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
    • H02G15/02—Cable terminations
    • H02G15/06—Cable terminating boxes, frames or other structures
    • 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
    • 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
    • H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing

Definitions

  • the present invention relates to an uninterrupted bypass construction for the overall underground distribution line, including the replacement of equipment and cables, such as transformers and switchgear of the underground distribution line, more specifically, the elbow coupled to the end of the cable for connecting the transformer or switch Due to its structure, bypass cannot be bypassed and underground cables cannot be cabled because of their characteristics (in the case of a processing line, the uninterrupted work is performed by connecting the bypass cable to the shelled area by covering the jacket).
  • extension elbow with branch connection function which is designed to pass, has been applied during the new construction of underground distribution lines or in the case of existing underground lines, the existing elbow connection port is replaced with extension elbows by uninterrupted connection by sequential disconnection method None of the above underground distribution lines If a power outage is required, the extension elbow with branch connection, temporary transformer, switchgear, and bypass cable are used to bypass the underground distribution line for temporary transmission and then safely perform all operations on the distribution line in an uninterrupted state. It was made possible.
  • Underground line business plans have been steadily increasing, so that the construction of overhead lines is technically impossible and difficult to maintain.
  • facilities for power lines or distribution lines are installed to draw out distribution lines for multiple lines.
  • Underground distribution lines for future load increases The target is the area near the substation drawer where the overhead line is concentrated, the place crossing the overpass, the highway, the railroad, etc. It is an area where administrative agencies and business cooperation are smooth.
  • Most of Korea's special high voltage underground power distribution system is composed of open loop system which can switch over to other systems at all times, and major customers adopt ALTS as a transfer switch by adopting main / reserve line (two lines) supply method. I use it.
  • the spot network method with high supply channel and good circuit utilization was announced in some areas, including the Teheran-ro area in Gangnam, but was not implemented.
  • the three-line spot network method was applied to the third government complex of the Dunsan district in Daejeon. First, it is applied to the Blue House.
  • underground distribution lines have been mainly constructed in large urban areas with high loads, which raises concerns about power outages, and causes many obstacles in traffic and traffic caused by the grounding of switchgear and transformer.
  • maintenance work of underground distribution lines is accompanied by power outages, so in areas with high power consumption, power outages are not possible during the day. .
  • the underground distribution line as described above is composed of a switch 100, 100 'and a transformer 110, 110' installed on the ground as shown in Figure 1 and 2, the switch 100 connected to the substation ( 100 ') and transformers 110 and 110' which are connected to the switchgear are connected to each other by a underground line in an annular network form, and are branched from the transformer to each customer or customer premises. will be.
  • the switchgear 100, 100 'and the transformer 110, 110' which are connected by underground lines, have a ring-shaped shape, and power is supplied from both sides, so that even if one part is cut off, It is configured not to interfere.
  • the switchgear 100, 100 ′ and the transformer 110, 110 ′ are connected to each other by cables 120 and 120 ′ for constructing underground lines.
  • An elbow connector 121 for engaging the connector bushings 101 and 111 of the switch 100, 100 ′ and the transformer 110, 110 ′ is provided at an end of the 120. As the 121 is inserted into and coupled to the connector bushings 101 and 111, the connection state between them is made.
  • the elbow connector 121 is to be formed by coupling the elbow connector 121 of the 'b' shape to the end of the underground cable 120, 120 'as shown in Figure 3, the elbow connector 121 On one side of the underground cable 120, 120 'is connected to the connecting rod 122 is in a state of being formed protruding, the connecting rod 122 is kept insulated from the elbow connector 121 The interconnection state is made by injecting the connecting rod 122 into the connector bushings 101 and 111 of the switch 100, 100 ′ or the transformer 110, 11 ′.
  • the underground line construction method by the underground cable 120, 120 includes direct sales, pipelines, old fashioned methods, etc.
  • the characteristics and application standards are as follows.
  • Power cables are directly buried in the ground, usually using troughs as cable protection, to protect the cables, and then cover and backfill them with sand. This method, however, involves road excavation when the cable is replaced, and is rarely used today.
  • the number of cable lines is more than three lines less than nine lines
  • the upper structure is a structure that can be laid on the inner wall side and allow workers to carry out maintenance work. Usually applies to the following cases.
  • the underground low-voltage distribution line as described above is installed in close proximity to the pedestrians in the city downtown area and is directly connected to a safety accident when an abnormality occurs.
  • Underground cable line detection technology was introduced due to the occurrence of cable damage due to various excavation works such as road maintenance and water supply and sewage. In terms of the excavation, 16,192 cases were conducted annually, causing 45.4 damages in the case of high-voltage cables, and low-voltage cables have not been counted in detail.
  • the breaker operates when the high voltage cable is damaged, but in the case of low voltage cable, the breaker does not operate when the damage is minute, so there is a high possibility that the line leakage will continue.
  • underground distribution line failure analysis and prevention measures published by KEPCO, approximately 82% of cases of failures by underground distribution facilities in 1997-2001 were caused by cables and connecting materials, which accounted for the majority of underground failures. According to the number of cases statistics, trauma accidents accounted for 39% and deterioration accidents accounted for 44%.
  • the accident analysis data of cables and connecting materials accounted for about 40% of accidents and 60% of non-traumatic accidents. In the case of cable, natural deterioration is 42%, and the cause of accidents is high.
  • connection part for bypass cable connection
  • the connection part is not only a conductor, but also a narrow part is forcibly attached to the device. Bushing damage and trauma to elbow joints can occur.
  • connection materials Second, separate equipment for the installation of connection materials should always be accompanied.
  • the single phase elbow live switchgear has a small size and light weight, and the three phase simultaneous live elbow separation device used when working three phases at the same time is also small in volume, so it is a means for transporting separate equipment when moving for construction. There is also a risk of secondary accidents that occur during transportation. In addition, since the equipment must be installed in advance for construction and must be separated and dismantled after the completion of work, the disadvantage of requiring a lot of work time is not only followed. There is.
  • the present invention improves the problems as described above and expands the uninterruptible work range of underground distribution lines so that all operations are possible, and replaces the existing elbow fittings at the end of the cable for connecting the switch and the transformer for underground distribution lines.
  • the extension elbow with branch design is designed to be applied to new construction of underground distribution lines, or in the case of existing underground lines, the existing elbow connections are replaced with extension elbows uninterrupted by the sequential disconnection method.
  • uninterrupted construction such as transformer, switchgear and cable replacement construction
  • the extension elbow having the above branch connection function by using the extension elbow having the above branch connection function, the bypass cable for temporary transmission is installed uninterrupted and the work section is switched to oblique state, making it very safe and fast. Construction can be done Of course, the underground distribution line using the extension elbow, which has a branch connection function, enables all work on the construction work during the uninterrupted state in the uninterrupted state. It is an object of the present invention to provide an uninterruptible bypass construction method.
  • the underground transformer and the switchgear for the underground distribution line connected by the existing elbow connector coupled to the end of the cable for underground lines because the power supply can be supplied from both sides
  • the cable of one side of the switchgear and the transformer is disconnected to be in a diagonal state, and the other cable is kept in a live state, and then the cable end of the wired state separated from the switch and the transformer is separated from the cable end.
  • the existing elbow connector is removed and removed, and the extension elbow having the newly designed branch connection is coupled to the end of the cable from which the existing elbow connector is removed.
  • Input cable to make cable in live state live and the other end in live state
  • the cable is separated from the switchgear and the transformer so that it becomes oblique and replaces the existing elbow connector with an extension elbow having a branch connection function (all elbow connections, extension elbows,
  • the insulation cap of the extension elbow uses the grounding tool to completely discharge the charged charge, and at the same time, the protective part and the protective device according to the safety rules for live work are used to protect the charging part and the worker protection measures.
  • the end of the bypass cable having temporary switchgear and temporary transformer with the capacity corresponding to the section to be replaced should be After connecting the extension elbow coupled to the transformer, the cable of the section to be replaced is in a diagonal state, and then performs the replacement construction of the corresponding switch and transformer and the cable connecting them, and replaces the switch and transformer After the cable is connected to the live state is made, it is made by removing the temporary transmission bypass cable.
  • the present invention provides a very safe and quick replacement when devices and cables, such as switchgear or transformer for underground distribution lines, need to be replaced by extension elbows having branch connection functions capable of extension connection or additional bypass connection.
  • the uninterrupted construction method of underground distribution lines and if you want to perform the relevant construction necessary for the maintenance and repair of the underground distribution lines, the operation of most underground distribution lines in the past has been applied to the construction cost in the event of power failure in an unstable state at night. It is very reasonable because it can be efficiently and safely uninterrupted by weekly work, and it is economical technology with low construction cost as a whole even if uninterruptible products are applied to work sections.
  • 1 is a configuration diagram of a typical underground distribution line
  • FIG. 2 is a state diagram of a switch and a transformer in a typical underground distribution line
  • Figure 3 is an enlarged view showing the cable connection port of a typical underground distribution line
  • FIG. 4 is an exploded cross-sectional view of the extension elbow according to the present invention.
  • FIG. 6 is a process diagram for replacing the extension elbow according to the present invention to the transformer connection portion
  • Figure 7 is a underground distribution line of the completion of the replacement of the extension elbow according to the present invention
  • Figure 8 is a cross-sectional view of the coupling portion made of the extension elbow according to the present invention.
  • FIG. 9 is a cross-sectional view of the insulating cap removed from the extension elbow of FIG.
  • FIG. 10 is a diagram illustrating a process of inserting a bypass cable for temporary transmission in the state of FIG.
  • FIG. 11 is a cross-sectional view of a temporary cable for temporary transmission connected in the state of FIG. 10; FIG.
  • Figure 12 is a construction example of the underground distribution line by the extension elbow according to the present invention.
  • Figure 13 is another construction example of the underground distribution line by the extension elbow according to the present invention.
  • Figure 14 is another construction example of the underground distribution line by the extension elbow according to the present invention.
  • Figure 15 is another construction example of the underground distribution line by the extension elbow according to the present invention.
  • Figure 16 is another construction example of the underground distribution line by the extension elbow according to the present invention.
  • FIG. 4 is an exploded cross-sectional view of the extension elbow having the branch connection function according to the present invention.
  • the ends of the cables 30 and 30 ' are inserted and fixed inside the insulator, and the cables 30 and 30 are provided on both sides of the extension elbow 40. ') And the connecting rod 41 and the branch connection pin 42 in the energized state is connected to each.
  • the connecting rod 41 protrudes from one side of the extension elbow 40 and the branch connection pin 42 is inserted recessed from one side of the extension elbow 40.
  • the branch connection pin 42 Is to connect a work bypass cable to a separate temporary switch or transformer.
  • One side of the extension elbow 40 corresponding to the branch connection pin 42 has a separate insulating cap 43 is coupled to the ground connection line as usual when the insulation cap 43 is in a coupled state as necessary
  • the temporary switchgear may be removed by using the branch connection pin 43 in an open state after removing the insulation cap 43.
  • the bypass cable can be connected by connecting a temporary transformer.
  • the existing elbow connector connected to the ends of the cables 30 and 30 ′ is connected to both sides of the switches 10 and 10 ′.
  • one side of the cable 30, 30 ' is separated to be in a diagonal state, and the other side of the cable is kept in a live state, as described above.
  • the new extension elbow 40 is replaced in the state where it is connected to the switchgear 10, 10 ′, and the diagonal cable is connected again to be live.
  • the other side of the cable is also in a diagonal state, and when the existing elbow connection port is connected to the live state in the state of replacing the extension elbow, the switch 10, 10 'is continuously supplied with electric power without disconnection of the underground distribution line.
  • Existing elbow connector can be replaced with extension elbow with branch connection.
  • connection port of the transformer 20, 20 ' is to be replaced, as shown in FIG. 6, one side cable of the transformer has a branch connection function in a state in which the elbow connection port is separated and then removed. It is necessary to replace with extension elbows, and the other cable can also be replaced with diagonally connected connectors.
  • the switches 30, 10 ′ and the transformers 20, 20 ′ of all underground distribution lines are terminated with an extension elbow 40 having a new branch connection function.
  • the connection state is maintained by 30 '.
  • extension elbow having a branch connection function according to the present invention and the bypass cable for temporary transmission, uninterruptible replacement construction can be easily and efficiently performed in a weekly operation
  • the extension elbow having the branch connection function is It has a branch connection pin for convenient connection to connect the pass cable, so that the switch and transformer or cable can be replaced in an uninterruptible state.
  • each of the switches 10, 10 ′ and the transformers 20, 20 ′ is constructed with an underground line by extension elbows 40 having branch connections. It will be connected to 30 '.
  • the insulation cap 43 is removed from the extension elbow 40 as illustrated in FIG. 9. Bypassing the cable connection port 71 at the end of a separate bypass cable 70 to the branch connection pin 43 exposed by removing the insulating cap 43, the bypass cable 70 The bypass 70 is connected to the temporary switchgear 50 or the temporary transformer 60 by-pass.
  • bypass cable is connected to the temporary transformer or more transformer to be replaced to ensure a stable power supply to each customer or customer premises.
  • the transformer to be replaced becomes oblique by sequential disconnection operation. Therefore, the safe transformer and the quick replacement of the transformer are performed.
  • the temporary transformer is continuously powered by the live bypass cable. As a result, it can be maintained uninterrupted in the customer or customer premises.
  • the uninterruptible replacement construction of such a transformer is applied to all cases in which a plurality of transformers are replaced at the same time or a single transformer is to be replaced alone.
  • the extension elbow When replacing the switch with one-way one-way power supply, the extension elbow having the branch connection function of the switch to replace the bypass cable having a temporary switch having a capacity equal to or higher than that of the switch as shown in FIG.
  • the transformer is connected to the switch to be replaced, and the transformer is connected to the temporary switch to bypass the power supply.
  • the cable connecting the switch and the transformer is separated from the neighboring transformer and the switch to be in a diagonal state, and then, when the live cable is disconnected from the switch, the power supply to the switch to be replaced is cut off, thereby ensuring a safe replacement. It is possible, and because the power is continuously supplied to each customer and customer premises through a transformer bypassed from the temporary switchgear, the switchgear in the uninterrupted state is made.
  • the bypass cable is connected to one switch and the neighboring transformer as shown in FIG. 15.
  • the temporary transformer with the same capacity or higher to continue the power supply, and remove the cable connected to the transformer to be replaced from the neighboring transformer or switch and then in the diagonal state
  • the cable connected to the replaced transformer to supply power to the completed line and at the same time separate and remove the temporary bypass cable is a safe transformer replacement in the uninterrupted state.
  • one end of the bypass cable is connected to one switch as shown in FIG. Or connected to an extension elbow formed on one transformer, connecting a temporary transformer with a capacity equal to or higher than the corresponding transformer, and disconnecting the cable connected to the transformer to be replaced from a neighboring transformer or switch, in the diagonal state. If the bypass cable is removed after supplying power to the cable connected to the replaced transformer, a safe transformer replacement in an uninterruptible state is also performed.

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Abstract

La présente invention concerne un procédé de bypass sans coupure pour une ligne d'alimentation souterraine, qui permet la maintenance sans coupure pour le remplacement de dispositifs tels que des transformateurs, commutateurs ou analogues, et des câbles de la ligne d'alimentation souterraine. Plus particulièrement, le coude de rallonge de la présente invention présente une fonction de raccordement séparé qui permet le bypass sans coupure de la ligne d'alimentation souterraine, alors que des raccords coudés classiques sont uniquement raccordables aux extrémités de câbles souterrains reliant entre eux des commutateurs et des transformateurs de la ligne d'alimentation souterraine. Lorsque le remplacement sans coupure de commutateurs, transformateurs et câbles de la ligne d'alimentation souterraine est mis en oeuvre quand le coude de rallonge de la présente invention est installé à la place de coudes classiques pour la nouvelle construction d'une ligne d'alimentation souterraine, ou quand des raccords coudés classiques sont remplacés sans coupure dans des lignes d'alimentation souterraines classiques par des coudes de rallonge à l'aide d'un procédé séquentiel de séparation et de raccordement, le coude de rallonge de la présente invention permet l'installation sans coupure de câbles de bypass pour la transmission temporaire d'énergie, et ainsi permet d'obtenir une installation sans coupure remarquablement sûre et rapide. En outre, le procédé de bypass sans coupure de la ligne d'alimentation souterraine utilisant le coude de rallonge présentant une fonction de raccordement séparé selon la présente invention constitue une technique de câblage souterrain nouvelle ainsi que remarquablement sûre et économiquement avantageuse qui permet l'installation et la construction d'une ligne d'alimentation souterraine sans coupure pendant la journée, comparé à des systèmes classiques dans lesquels l'installation et la construction d'une ligne d'alimentation souterraine est en général mise en oeuvre avec coupure pendant la nuit, ce qui est dangereux et inefficace.
PCT/KR2010/000239 2009-04-14 2010-01-15 Procédé de bypass sans coupure pour ligne d'alimentation souterraine utilisant un coude de rallonge présentant une fonction de communication interrompue Ceased WO2010120035A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2009-0032235 2009-04-14
KR1020090032235A KR100926445B1 (ko) 2009-04-14 2009-04-14 분기접속기능을 갖는 익스텐션 엘보우를 이용한 지중배전선로의 무정전 바이패스 시공법

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KR100664820B1 (ko) * 2004-07-26 2007-01-04 양희성 무정전작업이 가능한 저압선로 분기함
KR100769583B1 (ko) * 2006-07-04 2007-10-23 주식회사 평일 무정전 공법에 의한 지중 배전선로의 지상 변압기 교체방법
KR100769335B1 (ko) * 2006-07-19 2007-10-24 주식회사 평일 무정전 공법에 의한 변압기 교체용 1차측 접속장치
KR20080020719A (ko) * 2006-08-24 2008-03-06 주식회사 평일 무정전 공법에 의한 지중 배전선로의 케이블 교체방법

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CN114156674A (zh) * 2021-11-01 2022-03-08 广西电网有限责任公司南宁供电局 一种开闭所旁路系统快速接线子母头

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