KR20060080135A - Cable cooling device by forced circulation of insulating oil between parallel OF cables - Google Patents

Cable cooling device by forced circulation of insulating oil between parallel OF cables Download PDF

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Publication number
KR20060080135A
KR20060080135A KR1020060030610A KR20060030610A KR20060080135A KR 20060080135 A KR20060080135 A KR 20060080135A KR 1020060030610 A KR1020060030610 A KR 1020060030610A KR 20060030610 A KR20060030610 A KR 20060030610A KR 20060080135 A KR20060080135 A KR 20060080135A
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South Korea
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cable
insulating oil
oil
forced circulation
cooling
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KR1020060030610A
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Korean (ko)
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임성황
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임성황
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/54—Insulators or insulating bodies characterised by their form having heating or cooling devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/34—Insulators containing liquid, e.g. oil
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/38—Fittings, e.g. caps; Fastenings therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
    • H01B7/421—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation
    • H01B7/423—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation using a cooling fluid

Abstract

본 발명은 병렬 OF케이블 상호간 절연유 공간을 강제순환냉각기(69)를 매개로 냉각 폐회로를 구성하여 케이블을 냉각시키는 OF케이블 냉각장치에 관한 것이다.The present invention relates to an OF cable cooling device for cooling a cable by forming a closed circuit closed by the forced circulation cooler 69 through the insulating oil space between the parallel OF cables.

현재 설치된 OF케이블은 절연유가 강제순환 되지 않고 도체에서 발생한 열을 대류에 의해 순환되면서 냉각되는 것이 고작이다. 또한 OF케이블에 사용되는 유압탱크는 단지 케이블 포설 경로에 의해 발생하는 유압을 유지해주기 위하여 설치되었다. 도5에서 도시한 바와 같이 유압탱크에서 케이블로 연결되는 유관(51)은 하나이고 이것은 절연유의 강제순환이 없음을 말해 준다.Currently installed OF cables are cooled by convection of heat generated from the conductors without the forced circulation of the insulating oil. In addition, the hydraulic tanks used for OF cables are installed only to maintain the hydraulic pressure generated by the cable laying path. As shown in FIG. 5, there is one oil pipe 51 connected to the cable in the hydraulic tank, which indicates that there is no forced circulation of the insulating oil.

본 발명에서는 냉동사이클로 냉각되는 강제순환냉각기(69)에 유압을 유지해 주는 유압탱크로부터 유압탱크유관(71)과 절연유순환팬(160)을 거쳐 한 가닥의 OF케이블의 절연유주입커넥터(35)로 연결되는 냉각기유출유관(72)과 또 다른 한 가닥의 OF케이블의 절연유주입커넥터(35)로 연결되는 냉각기유입유관(73)을 연결하고, 냉각구간 반대편 접속부위에는 위와 반대로 냉각장치를 연결하여 냉각 폐회로를 구성하여 OF케이블을 효과적으로 냉각시킨다. 강제순환냉각기(69)에서 냉각된 절연유는 도체 중심에 형성된 유통로(18)를 통하여 순환함으로써 도체중심을 냉각시켜 OF케이블의 열 문제를 획기적으로 제거할 수 있다.In the present invention, the hydraulic tank for maintaining the hydraulic pressure in the forced circulation cooler (69) to be cooled by the refrigeration cycle is connected via the hydraulic tank oil pipe (71) and the insulating oil circulation fan 160 to the insulation oil injection connector 35 of the strand of OF cable Connect the cooler inlet pipe (72) and the cooler inlet pipe (73) connected to another insulated inlet connector (35) of the OF cable, and connect the cooling device on the opposite side of the cooling section to the opposite side to the cooling closed circuit. By cooling the OF cable effectively. The insulating oil cooled in the forced circulation cooler 69 circulates through the flow path 18 formed at the center of the conductor to cool the center of the conductor, thereby significantly removing the thermal problem of the OF cable.

냉동사이클의 냉매가 증발기에서 기화하면서 기체상태의 냉매가 지니는 운동에너지로 터빈(77)을 돌려 터빈축에 연결된 발전기(또는 기계장치)(78)에서 전력 또는 물리적 에너지를 얻는 장치도 부가하였다. 케이블의 1년간 운전 실적을 보면 중부하가 걸리는 시간은 불과 몇 시간에 지나지 않으므로 이 짧은 시간동안만 냉동사이클로 케이블을 효과적으로 냉각을 시키면 케이블 용량은 더욱더 증대될 것이다.As the refrigerant in the refrigerating cycle was evaporated in the evaporator, a device for obtaining electric power or physical energy from the generator (or mechanism) 78 connected to the turbine shaft by turning the turbine 77 with the kinetic energy of the gaseous refrigerant was added. The cable's one-year operation shows that heavy loads take only a few hours, so effective cooling of the cables in the refrigeration cycle during these short periods will increase cable capacity even further.

OF케이블, 유통로, 유압탱크, PT, BPT, 냉동사이클, 냉각장치 OF cable, distribution channel, hydraulic tank, PT, BPT, refrigeration cycle, cooling system

Description

병렬 OF케이블간 절연유 강제순환에 의한 케이블 냉각장치{omitted}Cable cooling device by forced circulation of insulating oil between parallel OF cables

도 1은 기존의 OF케이블 단면도이다.1 is a cross-sectional view of a conventional OF cable.

도 2는 OF케이블 유지접속(SJ; Stop Joint) 접속재 연결상태 설명도이다.FIG. 2 is an explanatory diagram of a connection state of an OF cable stop joint (SJ) connection member. FIG.

도 3은 OF케이블 유지접속(SJ; Stop Joint) 접속함 단면도이다.3 is a cross-sectional view of an OF cable stop joint (SJ) junction box.

도 4는 기존 유압탱크(PT, BPT) 설명도이다.4 is an explanatory view of the existing hydraulic tank (PT, BPT).

도 5는 기존 OF케이블과 유압탱크 연결 설명도이다.5 is an explanatory view of connecting the existing OF cable and the hydraulic tank.

도 6은 본 발명에 의한 강제순환냉각기 설명도이다.6 is an explanatory view of a forced circulation cooler according to the present invention.

도 7은 병렬 케이블 2선간 절연유 강제순환 냉각장치 설명도이다.7 is an explanatory diagram of a forced forced circulation cooling system for insulated oil between parallel cables.

도 8은 병렬 케이블 3선간 절연유 강제순환 냉각장치 설명도이다.FIG. 8 is an explanatory diagram of a forced forced circulation cooling system for insulated oil between three parallel cables. FIG.

도 9는 345kV OF Cable 년간 운전전류 지속곡선 설명도이다.9 is an explanatory diagram of a 345 kV OF cable year continuous operating current curve.

〈도면의 주요부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

11 : 방식층 12 : 시스11: anticorrosive layer 12: sheath

13 : 시스내측공간 14 : 외부반도전층13: inner space of the sheath 14: outer semiconducting layer

15 : 절연층 16 : 내부반도전층15 insulation layer 16 internal semiconducting layer

17 : 도체 18 : 유통로17: conductor 18: distribution channel

21 : 접속재 22 : 절연유유출홈21: connecting member 22: insulating oil leakage groove

31 : 세미연공부 32 : 절연유공간31: semi-soft part 32: insulating oil space

33 : 벨마우스 34 : 절연보강층33: Bell mouse 34: insulation reinforcement layer

35 : 절연유주입커넥터 36 : 접속함35: Insulation oil injection connector 36: Connection box

41 : 외함 42 : N2가스41: enclosure 42: N 2 gas

43 : 절연유 44 : 절연유셀43: insulating oil 44: insulating oil cell

45 : 외유 46 : N2가스셀45: foreign oil 46: N 2 gas cell

47 : 벨로우즈 51 : 유관47: bellows 51: related

60 : 단열재 61 : 증발기60: insulation 61: evaporator

62 : 팽창밸브(또는 모세관) 63 : 냉매저장탱크62: expansion valve (or capillary tube) 63: refrigerant storage tank

64 : 응축기 65 : 압축기64: condenser 65: compressor

66 : 모터(또는 엔진) 67 :터빈66: motor (or engine) 67: turbine

68 : 발전기(또는 기계장치) 69 : 강제순환냉각기68: generator (or machinery) 69: forced circulation cooler

71 : 유압탱크유관 72 : 냉각기유출유관71: hydraulic tank oil pipe 72: cooler outflow pipe

73 : 냉각기유입유관 160 : 절연유순환팬73: cooler inlet pipe 160: insulated circulation fan

OF케이블은 지절연을 하고 도체중심의 유통로 또는 밀폐된 시스내측 공간에 절연유를 충진하여 절연을 보강하며 이 절연유의 대류현상을 통해 도체 내부에서 발생한 열을 케이블 외부로 방출 한다. 그러나 케이블을 빠져나온 열이 케이블이 설치된 전력구 또는 관로에 축적되므로 케이블 용량을 증대시키지 못하는 단점을 지니고 있다. 최근에 이 열을 외부공간으로 제거시키기 위하여 수냉각 설비를 도입하고 있으나 열교환이 효과적이지 않고 새롭게 수냉각 설비를 갖추어야 하므로 많은 비용을 유발한다. 또한 초전도 케이블이 생산단계에 있으나 전력손실이 기존 케이블의 절반 정도나 되고 기술이 완성단계가 아니라서 가격도 비싸고 기술적 문제점이 있어 상용화에는 많은 시간이 필요할 것으로 보인다.OF cable reinforces insulation by ground insulation and fills the insulating oil in the distribution center of the conductor center or inside the sealed sheath and releases the heat generated inside the conductor through the convection of the insulating oil to the outside of the cable. However, the heat exiting the cable accumulates in the power outlet or the pipe in which the cable is installed, which does not increase the cable capacity. Recently, a water cooling system has been introduced to remove this heat to the outside space, but heat exchange is not effective and a new water cooling system must be provided, which causes a lot of cost. In addition, superconducting cables are in the production stage, but the power loss is about half of existing cables, and the technology is not completed, so the price is expensive and there are technical problems.

본 발명에서는 OF케이블의 절연유를 강제순환시켜 냉각의 효과를 증대시키고자 한다. 그러나 새로운 냉각시스템을 구성하더라도 추가되는 설비가 최소화되도록 하고 기존의 설비들은 그대로 재활용 할 수 있도록 하여 투자비를 최소화시킨다. 따라서 OF케이블 절연유를 강제순환 시킴에 있어서 별도의 회수관로를 사용하지 않고 주변에 설치되는 병렬 OF케이블의 절연유 공간을 사용한다. 또한 냉동사이클에 터빈을 설치하여 에너지 생산도 추가한다.In the present invention, it is intended to increase the effect of cooling by forced circulation of the insulating oil of the OF cable. However, even if a new cooling system is constructed, additional equipment is minimized and existing equipment can be recycled as it is to minimize investment costs. Therefore, in the forced circulation of OF cable insulation oil, use the space of the oil of parallel OF cable installed in the periphery instead of using a separate return line. It also adds energy production by installing turbines in refrigeration cycles.

도1은 기존의 OF케이블 단면도이다. OF케이블의 중심에는 유통로(18)가 존재하고 절연체 외부에는 시스내측공간(13)이 있다.1 is a cross-sectional view of a conventional OF cable. There is a channel 18 at the center of the OF cable and a sheath inner space 13 outside the insulator.

도2는 OF케이블 유지접속(SJ; Stop Joint) 접속재 연결상태 설명도이다. 유통로(18)를 통한 절연유흐름은 접속재(21) 내부에서 중지되고 절연유흐름은 절연유유출홈(22)을 통하여 접속함 내부로 연결된다.Fig. 2 is an explanatory diagram of a connection state of an OF cable stop joint (SJ) connection member. Insulating oil flow through the flow path 18 is stopped in the connecting member 21 and the insulating oil flow is connected into the junction box through the insulating oil outflow groove 22.

도3은 OF케이블 유지접속(SJ; Stop Joint) 접속함 단면도이다. 유통로(18)를 통한 절연유흐름은 접속재(21) 내부에서 중지되고, 절연파괴의 염려로 절연유는 절연유유출홈(22)를 지나 도체와 수직방향으로 인출되지 못하고 경사진 공간을 따라 접속함 내부 절연유공간(32)으로 유입된다. 절연유유출홈(22) 및 접속도체부위 상부는 절연보강층을 형성하여 절연 약화를 막는다. OF케이블은 하나의 유지접속(SJ)에서 시작하여 여러 개의 보통접속(NJ; Normal Joint)과 절연접속(IJ; Insulated Joint)을 거쳐 다시 유지접속(SJ)이 연결되는 연결된 하나의 유계통을 형성한다.Fig. 3 is a cross-sectional view of the OF cable stop joint (SJ) junction box. Insulating oil flow through the flow path 18 is stopped inside the connecting member 21, and the insulating oil is not drawn out vertically to the conductor through the insulating oil outflow groove 22 due to the risk of insulation breakdown. It flows into the insulating oil space 32. The insulating outflow groove 22 and the upper portion of the connection conductor form an insulating reinforcement layer to prevent insulation weakening. The OF cable forms one ties connected from one maintenance connection (SJ) to several maintenance connections (NJ) and insulated joints (IJ) and again connected to the maintenance connection (SJ). do.

도4는 기존 유압탱크(PT, BPT) 설명도이다. 절연유 유입셀형 PT는 밀폐된 유조 외함(41) 내부의 하부에 외유(45)를 주입하고 그 내부에 절연유셀(44)을 배치하고 상부에는 N2가스로 충진하여 케이블 절연유에 압력을 가한다. 케이블내의 절연유가 열팽창하면 PT내부로 절연유가 유입되고 절연유셀(44)은 팽창한다. 절연유가 열수축하면 반대로 절연유셀(44)은 수축한다. 가스 유입셀형 PT는 밀폐된 유조 외함(41) 내부에 N2가스로 충진된 N2가스셀(46)을 배치하고 나머지 공간에 절연유를 주입한다. 케이블내의 절연유가 열팽창하면 PT내부로 절연유가 유입되고 N2가스셀(46)은 수축한다. 절연유가 열수축하면 반대로 N2가스셀(46)은 팽창한다. BPT는 밀폐된 유조 외함(41) 내부에 벨로우즈(47)를 설치하고 N2가스로 외함(41) 내부를 충진하고 벨로우즈(47) 내부에는 절연유(43)를 수입시킨다. 케이블내의 절연유가 열팽창하면 BPT내부로 절연유가 유입되고 N2가스는 수축한다. 절연유가 열수축하면 반대로 N2가스가 팽창한다.4 is an explanatory view of the existing hydraulic tank (PT, BPT). Insulating oil inlet cell type PT injects the outer oil 45 into the lower portion of the sealed oil tank enclosure 41, arranges the insulating oil cell 44 therein, and fills the upper portion with N 2 gas to apply pressure to the cable insulating oil. When the insulating oil in the cable is thermally expanded, the insulating oil flows into the PT and the insulating oil cell 44 expands. On the contrary, when the insulating oil heat shrinks, the insulating oil cell 44 contracts. Gas inlet cell type PT is disposed a N 2 gas cell 46 filled with the N 2 gas inside the closed enclosure an oil bath (41), injecting the insulating oil in the remaining space. When the insulating oil in the cable thermally expands, the insulating oil flows into the PT and the N 2 gas cell 46 contracts. On the contrary, when the insulating oil heat shrinks, the N 2 gas cell 46 expands. The BPT installs the bellows 47 inside the sealed oil tank enclosure 41, fills the inside of the enclosure 41 with N 2 gas, and imports insulating oil 43 into the bellows 47. When the insulating oil in the cable thermally expands, the insulating oil flows into the BPT and the N 2 gas contracts. When the insulating oil heat shrinks, N 2 gas expands on the contrary.

도5는 기존 OF케이블과 유압탱크 연결설명도이다. 유압탱크에서 유출되는 1가닥의 유관(51)은 절연유주입커넥터(35)를 통하여 OF케이블과 연결된다. 1가닥의 유관으로는 폐회로를 형성할 수 없어서 절연유 순환에 의한 냉각방식은 적용할 수 없고 절연유 대류현상에 의존할 뿐이고, 유압탱크는 단지 케이블 포설의 고저차에 따른 유압을 극복하는 역할만 수행한다. 더욱이 세미연공부(31)와 인근의 테이핑은 시스내측공간(13)의 절연유계통과 유통로(18) 및 접속함(36)의 절연유공간(32)의 절연유계통을 분리시켜 두 공간 사이의 절연유 유통은 촘촘히 감겨진 절연지 사이 공간에 의존하는 실정이다.5 is an explanatory diagram of connecting the existing OF cable and the hydraulic tank. One strand of oil pipe 51 flowing out of the hydraulic tank is connected to the OF cable through the insulated oil injection connector 35. One stranded conduit cannot form a closed circuit, so the cooling method by insulating oil circulation is not applicable and only depends on the convection of insulating oil. The hydraulic tank only serves to overcome the hydraulic pressure due to the high and low level of cable laying. Moreover, the semi-perforated part 31 and the taping in the vicinity separate the insulating oil system of the sheath inner space 13 and the insulating oil system of the flow path 18 and the insulating oil space 32 of the junction box 36, thereby insulating oil between the two spaces. The distribution depends on the space between the tightly wound insulating paper.

도6은 본 발명에 의한 강제순환냉각기(69) 설명도다. 강제순환냉각기(69)는 병렬 OF케이블 사이에 설치된다. 강제순환냉각기(69)는 외함 내부에 단열재(60)를 설치하고 내부에 절연유를 주입시킨다. 절연유 내부에는 열 교환이 많이 일어나는 구조의 증발기(61)를 설치하였고, 냉동사이클의 다른 설비는 강제순환냉각기(69) 외부에 배치하였다. 케이블로 절연유가 유출되는 출구에는 절연유순환팬(160)을 설치하여 절연유를 강제순환 시킨다. 절연유순환팬(160)에 연속하여 냉각기유출유관(72)을 설치하고, 또 다른 케이블로부터 절연유가 유입되는 냉각기유입유관(73)이 설치되고, 유압탱크로부터는 유압탱크유관(71)을 연결한다. 이 때의 냉동사이클은 압축기(65), 응축기(64), 냉매저장탱크(63), 팽창밸브(또는 모세관)(62), 증발기(61), 터빈(67), 다시 압축기(65)로 구성된다. 압축기(65)는 기체상태 냉매를 압축하고, 응축기(64)에서는 압축된 냉매가 열을 발산하면서 액체가 되고, 액체가 된 냉매는 냉각시스템의 관성을 높이고자 설치된 냉매저장탱크(63)에 모이게 되고, 액 체상태의 냉매는 팽창밸브(또는 모세관)(62)를 통과하면서 기체상태로 변화를 일으키며 부피가 팽창하기 시작한다. 팽창밸브(또는 모세관)(62)를 빠져나온 냉매는 팽창밸브(또는 모세관)(62)와 연결된 증발기(61)에서 절연유로부터 기화열을 흡수하며 기체가 된다. 증발기(61)를 지나온 기체는 터빈(67)을 회전시키고 압축기(65)로 들어가 압축되면서 냉동사이클의 한 사이클을 종료한다. 냉매저장탱크(63)를 제거하는 것과 절연유 온도를 감지하여 냉동사이클을 사용자의 의지에 따라 원활히 작동시키는 제어장치를 추가하는 것도 본 발명의 범위에 포함된다. 개방회로 냉동사이클은 외부에서 만든 냉매의 냉매저장탱크(63)에서 액체상태 냉매를 팽창밸브(또는 모세관)(62)를 통과하면서 기체로 변화를 일으키며 부피가 팽창하기 시작한다. 팽창밸브(또는 모세관)(62)를 빠져나온 냉매는 팽창밸브(또는 모세관)(62)와 연결된 증발기(61)에서 절연유로부터 기화열을 흡수하면서 기체가 된다. 유압탱크로 벨로우즈형(BPT)만을 도시하였으나 다른 형태의 유압탱크(PT)를 설치하는 것도 본 발명의 범위에 포함된다.6 is an explanatory view of the forced circulation cooler 69 according to the present invention. The forced circulation cooler 69 is installed between the parallel OF cables. Forced circulation cooler 69 installs the insulation 60 inside the enclosure and injects insulating oil therein. Inside the insulating oil, an evaporator 61 having a structure in which much heat exchange takes place was installed, and other equipment of the refrigeration cycle was disposed outside the forced circulation cooler 69. At the outlet of the insulating oil flows into the cable is installed an insulating oil circulation fan 160 to force the insulating oil. The coolant outflow pipe 72 is provided continuously to the insulated oil circulation fan 160, and a cooler inflow pipe 73 through which insulation oil flows from another cable is installed, and a hydraulic tank oil pipe 71 is connected from the hydraulic tank. . At this time, the refrigeration cycle is composed of a compressor (65), a condenser (64), a refrigerant storage tank (63), an expansion valve (or capillary tube), an evaporator (61), a turbine (67), and a compressor (65) again. do. The compressor 65 compresses the gaseous refrigerant, and in the condenser 64, the compressed refrigerant dissipates heat to become liquid, and the refrigerant, which becomes liquid, collects in the refrigerant storage tank 63 installed to increase the inertia of the cooling system. Then, the refrigerant in the liquid state passes through the expansion valve (or capillary tube) 62, changes into a gaseous state, and the volume starts to expand. The refrigerant exiting the expansion valve (or capillary tube) 62 absorbs heat of vaporization from the insulating oil in the evaporator 61 connected to the expansion valve (or capillary tube) 62 and becomes a gas. The gas passing through the evaporator 61 rotates the turbine 67 and enters the compressor 65 to be compressed and ends one cycle of the refrigeration cycle. It is also within the scope of the present invention to remove the refrigerant storage tank 63 and to add a control device that senses the insulating oil temperature and smoothly operates the refrigeration cycle according to the user's will. The open circuit refrigeration cycle changes the volume of the liquid refrigerant into the gas while passing through the expansion valve (or capillary tube) 62 in the refrigerant storage tank 63 of the externally made refrigerant. The refrigerant exiting the expansion valve (or capillary tube) 62 becomes a gas while absorbing heat of vaporization from the insulating oil in the evaporator 61 connected to the expansion valve (or capillary tube) 62. Although only the bellows type BPT is illustrated as the hydraulic tank, the installation of another type of hydraulic tank PT is also included in the scope of the present invention.

도7은 본 발명에 의한 2케이블간 절연유 강제순환 냉각장치 설명도이다. 하부의 OF케이블로부터 냉각기유입유관(73)을 통하여 강제순환냉각기(69)안으로 절연유가 유입된다. 유입된 절연유는 냉동사이클에 의해 냉각되고, 냉각된 절연유는 절연유순환팬(160)에 의해 냉각기유출유관(72)을 통하여 상부의 OF케이블의 좌측 절연유주입커넥터(35)를 통하여 상부의 OF케이블로 유입된다. 유입된 절연유는 상부 케이블 도체중심의 유통로(18)를 통하여 반대편 접속함으로 이동하면서 도체를 냉각시킨다. 도체의 열을 흡수한 절연유는 상부케이블의 우측 접속부위로 이동한다. 절연유는 계속해서 우측 절연유주입커넥터(35)와 연결된 우측 강제순환냉각기(69)의 냉각기유입유관(73)을 통하여 우측 강제순환 냉각기(69)에 유입된다. 절연유는 다시 냉동사이클에 의해 냉각되고 냉각된 절연유는 절연유순환팬(160)에 의해 냉각기유출유관(72)과 연결된 하부 케이블 우측 절연유주입커넥터(35)를 통하여 하부 케이블 우측 접속함으로 유입된다. 이 절연유는 하부 케이블 도체 중심에 형성된 유통로(18)를 통하여 좌측 접속함으로 이동하면서 하부 케이블 도체의 열을 흡수한다. 절연유는 하부케이블 좌측 절연유주입커넥터(35)와 연결된 냉각기유입유관(73)을 통하여 좌측 냉각기로 유입되어 냉각의 한 사이클을 종료한다. 병렬운전 케이블의 가닥수가 짝수일 경우에는 이와 같은 방법으로 냉각시스템구성이 가능하다.7 is an explanatory diagram of the forced forced circulation cooling oil between two cables according to the present invention. The insulating oil flows into the forced circulation cooler 69 from the lower OF cable through the cooler inflow pipe 73. The introduced insulating oil is cooled by the refrigeration cycle, and the cooled insulating oil is cooled by the insulating oil circulation fan 160 through the coolant outlet oil pipe 72 and through the left insulating oil injection connector 35 of the upper OF cable to the upper OF cable. Inflow. The introduced insulating oil cools the conductor while moving to the opposite junction through the channel 18 of the upper cable conductor center. Insulating oil which absorbs the heat of the conductor moves to the right connection of the upper cable. The insulating oil is continuously introduced into the right forced circulation cooler 69 through the cooler inlet pipe 73 of the right forced circulation cooler 69 connected to the right insulated oil injection connector 35. The insulating oil is cooled again by the refrigeration cycle and the cooled insulating oil is introduced into the lower cable right connector through the lower cable right insulating oil injection connector 35 connected to the cooler outlet oil pipe 72 by the insulating oil circulation fan 160. This insulating oil absorbs the heat of the lower cable conductor while moving to the left junction through the channel 18 formed at the center of the lower cable conductor. The insulating oil flows into the left cooler through the cooler inflow pipe 73 connected to the lower cable left insulated oil injection connector 35 to terminate one cycle of cooling. If the number of strands of parallel operation cable is even, the cooling system can be configured in this way.

도8은 본 발명에 의한 병렬 3케이블간 절연유 강제순환 냉각장치 설명도다. 병렬운전 케이블의 가닥수가 홀수일 경우에는 도7에서 도시한 바와 같은 냉각시스템으로는 잔여 한 가닥의 냉각이 불가능하다. 따라서 이 때에는 3가닥의 병렬 운전 케이블중 1가닥의 절연유공간을 회수공간으로 하고, 2가닥은 주입공간으로 하여 냉각시스템을 완성할 수 있다. 원리는 도7에서 설명한 바와 같다.8 is an explanatory view of the forced oil circulating cooling device between three parallel cables according to the present invention. When the number of strands of the parallel operation cable is odd, the remaining strands cannot be cooled by the cooling system as shown in FIG. Therefore, in this case, the cooling system can be completed by using the insulating oil space of one strand as the recovery space and the two strands as the injection space of the three parallel operation cables. The principle is as described in FIG.

도9는 현재 운전중인 345kV OF케이블의 년간 운전전류 지속곡선 설명도다. 도시한 바와 같이 1년중 중부하는 아주 짧은 시간에 국한함을 볼 수 있다. 따라서 이 짧은 시간만이라도 냉각성능이 우수한 냉동사이클로 도체를 직접 냉각 시킨다면 케이블 용량은 엄청나게 늘어날 것이다.Fig. 9 is an explanatory diagram of the annual operating current sustain curve of the 345kV OF cable currently in operation. As shown, the middle of the year is limited to a very short time. Therefore, even in this short time, if the conductor is directly cooled by a refrigeration cycle with excellent cooling performance, the cable capacity will increase enormously.

본 발명에서는 기존 OF케이블의 설비를 최대한 구조변경 없이 그대로 사용하 여 비용을 줄이면서 냉각된 절연유를 강제순환시켜 도체를 직접 냉각함으로써 냉각효과를 높혀 OF케이블의 용량을 극대화시키도록 하였다. 또한 냉동사이클에 터빈(67)을 설치하고 터빈축에 발전기(또는 기계장치)(68)를 설치하여 전력 또는 물리적 에너지를 추가로 생산할 수 있도록 하였다.In the present invention, by using the existing equipment of the OF cable as possible without changing the structure as much as possible while reducing the cost forced circulation of the cooled insulating oil directly to increase the cooling effect to maximize the capacity of the OF cable. In addition, by installing the turbine 67 in the refrigeration cycle and the generator (or machinery) 68 in the turbine shaft to be able to produce additional power or physical energy.

Claims (2)

OF케이블의 한 급유구간 양단 접속부위 각각에서 다수 병렬 OF케이블의 절연유계통을 관으로 연결하여 병렬 OF케이블 유통로(18)가 절연유 순환회로의 일부가 되도록 폐회로를 형성시키고 절연유 강제순환에 의해 OF케이블을 냉각하는 방법.Connect the insulation oil system of multiple parallel OF cables at each end of the oil supply section of the OF cable with a pipe to form a closed circuit so that the parallel OF cable flow path 18 becomes part of the insulation oil circulation circuit. How to cool it. 병렬 OF케이블의 1급유구간 일단 접속부위에서 한 가닥의 OF케이블 절연유주입커넥터(35)와 연결되는 냉각기유입유관(73)과 또 다른 한 가닥의 OF케이블 절연유주입커넥터(35)와 연결되는 냉각기유출유관(72)과 유압탱크와 연결 되는 유압탱크 유관(71)을 지닌 강제순환냉각기(69)에 의해 병렬 OF케이블의 절연유 계통을 연결하고, 반대편 일단 접속부위에서 동일한 방법으로 병렬 OF케이블의 절연유 계통을 연결하여 병렬 OF케이블의 절연유 순환 폐회로를 형성시켜 이 절연유 순환 폐회로로 냉각된 절연유를 강제순환시켜 OF케이블을 냉각시키는 것을 특징으로 하는 병렬 OF케이블간 절연유 강제순환에 의한 케이블 냉각장치.The coolant outflow connected to one of the OF cable insulation oil inflow connectors 35 connected to one strand of OF cable insulated oil inflow connector 35 and the other of the OF cable insulation oil inflow connector 35 of the parallel OF cable. The insulated oil system of the parallel OF cable is connected by the forced circulation cooler 69 having the oil pipe 72 and the hydraulic tank oil pipe 71 connected to the hydraulic tank. And an insulating oil circulating closed circuit of the parallel OF cable by connecting the same, forcibly circulating the insulating oil cooled by the insulating oil circulating closed circuit to cool the OF cable.
KR1020060030610A 2006-04-04 2006-04-04 Cable cooling device by forced circulation of insulating oil between parallel OF cables KR20060080135A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109923623A (en) * 2016-09-09 2019-06-21 Itt制造企业有限责任公司 A kind of conductive contact element for electrical plug connector
WO2024034704A1 (en) * 2022-08-10 2024-02-15 엘지전자 주식회사 Vehicle charging system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109923623A (en) * 2016-09-09 2019-06-21 Itt制造企业有限责任公司 A kind of conductive contact element for electrical plug connector
WO2024034704A1 (en) * 2022-08-10 2024-02-15 엘지전자 주식회사 Vehicle charging system

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