KR20050091514A - Improved sheath current restrain unit in underground cable - Google Patents
Improved sheath current restrain unit in underground cable Download PDFInfo
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- KR20050091514A KR20050091514A KR1020040016991A KR20040016991A KR20050091514A KR 20050091514 A KR20050091514 A KR 20050091514A KR 1020040016991 A KR1020040016991 A KR 1020040016991A KR 20040016991 A KR20040016991 A KR 20040016991A KR 20050091514 A KR20050091514 A KR 20050091514A
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- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F15/00—Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like
- G09F15/0006—Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like planar structures comprising one or more panels
- G09F15/0012—Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like planar structures comprising one or more panels frames therefor
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F15/00—Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like
- G09F15/0006—Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like planar structures comprising one or more panels
- G09F15/0018—Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like planar structures comprising one or more panels panel clamping or fastening means
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F15/00—Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like
- G09F15/0068—Modular articulated structures, e.g. stands, and articulation means therefor
Abstract
본 발명은 지중 송전선로의 시스전류 억제장치에 관한 것으로, 그 기술적 구성은 철심의 둘레부에 코일이 다수회 권선된 리액터를 송전선로의 시스선에 연결 설치한 시스전류 억제장치에 있어서, 상기 리액터의 입력측에 직렬로 연결 설치되는 퓨즈와, 상기 리액터에 병렬로 연결되는 피뢰기가 구비되어 구성되어서, 평상시에는 시스전류를 억제하여 전력손실을 줄이고, 뇌격 침입이나 지락사고시에는 억제장치를 보호함과 더불어 침입된 전류는 대지로 원활하게 흐를 수 있도록 하여 전력 사고가 발생되는 것을 방지할 수 있도록 한 것이다. The present invention relates to a sheath current suppression apparatus for underground transmission lines, the technical configuration of the sheath current suppression apparatus in which a reactor in which a coil is wound several times around the iron core is connected to the sheath line of the transmission line. A fuse connected in series with the input side of the input and a lightning arrester connected in parallel with the reactor are configured to reduce the power loss by suppressing the sheath current, and to protect the suppressor in the event of a lightning strike or ground fault. The intruded current can flow smoothly to the ground to prevent the occurrence of a power accident.
Description
본 발명은 지중 송전선로의 시스전류 억제장치에 관한 것으로서, 보다 상세하게는 평상시에는 시스전류를 억제하여 전력손실을 줄이고, 뇌격 침입이나 지락사고시에는 억제장치를 보호함과 더불어 침입된 전류는 대지로 원활하게 흐를 수 있도록 하여 전력 사고가 발생되는 것을 방지할 수 있도록 된 지중 케이블의 시스전류 억제장치에 관한 것이다. The present invention relates to a sheath current suppression apparatus for underground transmission lines, and more particularly, to suppress power loss by suppressing the sheath current in normal times, and to protect the suppression apparatus in the event of a lightning strike or ground fault. The present invention relates to a sheath current suppression device for underground cables, which is capable of flowing smoothly to prevent an electric power accident from occurring.
일반적으로, 전력계통의 송전방식은 도시외곽 또는 농어촌지역의 경우 가공선 형태로, 대도시 중심부나 신도시 등에서는 지중에 매설된 케이블을 통해 전력을 공급하고 있다. 또한, 이러한 송전선로는 안전을 위해 일정구간마다 시스선을 통해 대지에 접지되며, 지중 송전선로의 경우에는 계통사고 등으로 인하여 시스선의 전위가 상승되는 것을 방지하고자 케이블 접속구간마다 시스선을 일괄적으로 접지하는 일괄접지방식으로 운영되고 있다. 따라서, 이러한 일괄접지방식은 송전선로에 전류가 흐르면, 이 송전선로의 둘레부에 설치된 금속 시스에도 전압이 유기되어 시스선을 통해 대지로 흐르게 된다. In general, the transmission system of the power system is in the form of overhead lines in the outskirts of the city or in the rural areas, and in the center of a large city or a new city, power is supplied through a cable buried underground. In addition, such a transmission line is grounded to the ground through the sheath line at regular intervals for safety, and in the case of underground transmission lines, the sheath line is collectively placed at every cable connection section to prevent the potential of the sheath line from rising due to a system accident. It is operated by batch grounding method. Therefore, in this batch grounding system, when a current flows through a transmission line, a voltage is induced to a metal sheath provided at the periphery of the transmission line, and flows to the ground through the sheath line.
그런데, 이와 같이 시스선에 전류가 흐르게 되면, 송전선로에는 불필요한 손실전력이 발생되며, 이러한 손실전력은 각상의 부하가 불평형일 경우에 더욱 심해져서, 안정적인 전력 전송을 방해하게 되며, 전송선로 내부의 온도를 상승시켜 송전선로의 열화를 유발하는 등의 여러 가지 문제점이 있다. 또한, 이러한 손실전력에도 불구하고, 부하전류 측정시 계기(hook on Am-meter)에는 부하전류와 순환전류의 합으로 나타나기 때문에, 순환전류로 인한 송전선로의 손실이 정확하게 파악되지 않는 문제점도 있다. However, when current flows through the sheath line, unnecessary loss power is generated in the transmission line, and this loss power becomes more severe when the load of each phase is unbalanced, thus preventing stable power transmission. There are various problems such as raising the temperature causing deterioration of the transmission line. In addition, in spite of such a loss power, since the load on the meter (hook on Am-meter) appears as the sum of the load current and the circulating current, there is also a problem that the loss of the transmission line due to the circulating current is not accurately identified.
따라서, 최근에는 철심코어의 둘레에 코일을 다수회 권선한 리액터를 시스선에 연결하여 평상시에는 시스선에 순환전류가 발생되지 않도록 함으로써 전력을 안정적으로 공급하는 역할을 하고, 지락사고 등 이상전압 발생 시에는 시스선의 전위상승을 제한함으로써, 송전선로에 이상전압의 발생을 억제시킬 수 있도록 된 시스전류 억제장치가 개발되어 국내특허 2001-53832호에 자세히 개시한바 있다.Therefore, in recent years, the reactor winding the coil core many times around the core core is connected to the sheath line, so that circulating current is not normally generated in the sheath line, thereby stably supplying power, and generating an abnormal voltage such as a ground fault. In the city, a sheath current suppression device has been developed in which the occurrence of an abnormal voltage in a transmission line can be suppressed by limiting the potential rise of the sheath line, and has been disclosed in detail in Korean Patent 2001-53832.
그러나, 이러한 시스전류 억제장치는 지락사고가 발생하였을 때 과전류에 의해 억제장치가 파손되어서 사고전류가 흐르지 못하게 됨에 따라, 더 큰 전력사고가 발생할 우려가 있으며, 마찬가지로 뇌격이 침입하였을 때도 억제장치의 절연이 파괴되어 전력사고를 유발하는 등의 문제점이 있다. 그 외에도, 상기 억제장치를 과도전류에 대해서도 어느 정도 견딜 수 있도록 제작되기 위해서는 그 사이즈와 무게 등이 과다하게 커져서 실제의 전력계통에는 이를 사용하기 어려운 등의 문제점이 있다. However, such a sheath current suppressor may cause a larger power accident as the suppressor is damaged by an overcurrent when a ground fault occurs, and thus an accident current does not flow. There is a problem such that it is destroyed to cause an electric accident. In addition, there is a problem that the size and weight of the suppressor is excessively large so as to be able to withstand the transient current to some extent, it is difficult to use it in an actual power system.
본 발명은 상기의 문제점을 해결하기 위해 창작된 것으로서, 본 발명의 목적은 컴팩트하게 제작되어 코스트가 절감되고 설치가 용이하면서도, 지락사고나 뇌격 침입시에도 억제장치가 보호됨과 더불어 사고전류를 대지로 원활하게 흐르도록 하므로써, 전력사고가 발생되는 것을 방지할 수 있도록 된 지중 케이블의 시스전류 억제장치를 제공함에 있다. The present invention has been created to solve the above problems, the object of the present invention is to compactly reduce the cost and easy installation, while the suppression device is protected even in the event of ground fault or lightning strike, and the accident current to earth The present invention provides a sheath current suppression apparatus for underground cables that can smoothly flow to prevent a power accident from occurring.
상기와 같은 목적을 실현하기 위한 본 발명은, 철심의 둘레부에 코일이 다수회 권선된 리액터를 송전선로의 시스선에 연결 설치한 시스전류 억제장치에 있어서, 상기 리액터의 입력측에 직렬로 연결 설치되는 퓨즈와, 상기 리액터에 병렬로 연결되는 피뢰기가 구비되어 구성된 것을 특징으로 한다. In the present invention for realizing the above object, in the sheath current suppression device in which a reactor in which a coil is wound several times around the iron core is connected to the sheath line of a transmission line, the reactor is connected in series to the input side of the reactor. A fuse and a lightning arrester connected in parallel to the reactor are provided.
위에서, 상기 퓨즈는 그 용량이 5㎄∼20㎄인 것을 특징으로 한다. In the above, the fuse has a capacity of 5 kPa to 20 kPa.
상기 리액터와 퓨즈, 피뢰기는 함체 내부에 수납되어 설치된 것을 특징으로 한다. The reactor, the fuse and the arrester are housed inside the enclosure.
이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 설명한다. 또한, 본 실시예는 본 발명의 권리범위를 한정하는 것은 아니고, 단지 예시로 제시된 것이며 종래 구성과 동일한 부분은 동일한 부호 및 명칭을 사용한다.Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In addition, this embodiment does not limit the scope of the present invention, but is presented by way of example only and the same parts as in the conventional configuration using the same reference numerals and names.
도 1은 본 발명에 따른 시스전류 억제장치의 구성도이다. 도시된 바에 따르면, 상기 시스전류 억제장치는 자화특성에 의해 시스전류를 억제하는 리액터(7)가 도시되지 않은 송전선로의 시스선에 연결되고, 이 리액터(7)의 입력측에는 과전류에 대해 리액터를 보호하는 퓨즈(4)가 직렬로 연결되며, 상기 리액터(7)와 병렬로 피뢰기(2)가 연결되어 이 피뢰기(2)를 통해 사고전류가 원활하게 대지로 흐를 수 있도록 하므로써, 전력계통의 사고를 방지할 수 있도록 한 것이다. 1 is a block diagram of a sheath current suppression apparatus according to the present invention. As shown, the sheath current suppressing device is connected to a sheath line of a transmission line (not shown) for the reactor 7 which suppresses the sheath current by the magnetization characteristic, and on the input side of the reactor 7, the reactor is subjected to overcurrent. A fuse 4 to be protected is connected in series, and an arrester 2 is connected in parallel with the reactor 7 so that an accident current flows smoothly to the ground through the arrester 2, thereby causing an accident in the power system. It is to prevent the.
상기 리액터(7)는 코일(5)과 철심(6)의 자화특성을 이용하여 순환전류를 억제하는 것으로, 도시되지 않은 시스선과 접지선 사이에 연결 설치된다. 상기 철심(6)은 전기 절연을 위하여 절연 바니쉬로 함침되고, 함체(3) 내부에 설치되어 수분 침투를 방지할 수 있도록 구성된다. 상기 코일(5)은 철심(6)의 둘레부에 다수회 권선된 것으로, 입력단자(1)는 송전선로쪽의 시스선에 연결되고, 출력단자(1’)는 대지에 접지되는 접지선에 접속된다. The reactor 7 suppresses a circulating current by using magnetization characteristics of the coil 5 and the iron core 6, and is connected between a sheath line and a ground line (not shown). The iron core 6 is impregnated with an insulation varnish for electrical insulation, and is installed inside the enclosure 3 to prevent moisture penetration. The coil 5 is wound several times around the core 6, the input terminal 1 is connected to the sheath line of the transmission line side, the output terminal 1 'is connected to the ground line grounded to the ground do.
상기 퓨즈(4)는 리액터(7)의 입력단자(1)에 직렬로 연결되어 지락사고 등이 발생되더라도 사고전류가 리액터(7)로 유입되지 않도록 차단하여 억제장치를 보호하는 것으로, 그 용량은 5㎄∼20㎄인 것을 이용함이 너무 쉽게 단선되지 않으면서도 리액터를 안전하게 보호할 수 있어 바람직하다. The fuse 4 is connected in series with the input terminal 1 of the reactor 7 to protect the suppression device by blocking an accident current from flowing into the reactor 7 even if a ground fault occurs. It is preferable to use 5 kV to 20 kV because the reactor can be safely protected without being disconnected too easily.
상기 피뢰기(2)는 리액터(7)에 병렬로 연결되어 지락사고나 뇌격 침입시 이 피뢰기(2)를 통해 사고전류가 대지로 흐를 수 있도록 하므로써, 송전선로에 전력사고가 발생되는 것을 방지하기 위한 것이다. The arrester 2 is connected to the reactor 7 in parallel to allow an accident current to flow through the arrester 2 in the event of a ground fault or lightning strike, thereby preventing a power accident from occurring in the transmission line. will be.
이러한 피뢰기(2)는 정상전압 상태에서는 전류가 흐르지 않도록 고저항을 가지나 번개 등이 침입하였을 경우에는 도전성의 전로가 되어 저항이 매우 작아져서 사고전류를 원활하게 흐르도록 하며, 다시 정상상태로 되면 고저항으로 되돌아가는 것으로, 발전소나 변전소, 송배전선로 등에 많이 사용된다. The arrester 2 has a high resistance so that current does not flow in a normal voltage state, but in case of lightning invasion, it becomes a conductive path, and the resistance becomes very small so that an accident current flows smoothly. It is used for power plants, substations and transmission and distribution lines.
이상의 구성에 의한 본 발명의 작용에 대해 설명하면 다음과 같다. Referring to the operation of the present invention by the above configuration is as follows.
상기 시스전류 억제장치는 시스선에 리액터(7)가 연결 설치되어 평소에는 이 리액터(7)의 임피던스에 의해 시스전류가 흐르는 것을 억제하여 송전선로의 전력손실을 줄일 수 있으며, 안정되게 전력을 전송할 수 있게 한다. The sheath current suppressor is connected to the reactor 7 is installed in the sheath line is usually suppressed the flow of the sheath current by the impedance of the reactor 7 can reduce the power loss of the transmission line, and transmit power stably To be able.
또한, 지락사고나 뇌격 침입시 상기 시스선에 리액터(7)의 용량을 초과하는 사고전류가 흐르게 되면, 리액터(7)의 입력단자(1)에 직렬로 연결된 퓨즈(4)가 단선되어 리액터(7)로 사고전류가 유입되는 것을 차단하여 억제장치의 파손을 방지할 수 있게 된다.In addition, if an accident current exceeding the capacity of the reactor 7 flows through the sheath line during a ground fault or a lightning strike, the fuse 4 connected in series to the input terminal 1 of the reactor 7 is disconnected and the reactor ( 7) It can prevent the breakdown of the suppression device by blocking the inflow of the accident current.
이때, 시스선에 침입된 사고전류는 리액터(7)에 병렬로 연결된 피뢰기(2)를 통해 대지로 원활하게 흘러서 송전선로에 전력사고가 발생되는 것을 방지하게 된다. At this time, the accident current penetrated into the sheath line flows smoothly to the ground through the arrester (2) connected in parallel to the reactor (7) to prevent the power accident occurs in the transmission line.
따라서, 이러한 시스전류 억제장치는 리액터(7)에 과전류가 유입되지 않기 때문에, 그 사이즈 및 용량 등을 종래에 비해 현저히 작게 하더라도 안전하게 사용할 수 있어서, 지중의 송전선로에 억제장치를 설치하기가 매우 용이하고, 유지보수도 편리한 장점이 있다. Therefore, since the sheath current suppressing device does not flow overcurrent into the reactor 7, the sheath current suppressing device can be safely used even if its size and capacity are considerably smaller than in the related art, and it is very easy to install the suppressing device in the underground transmission line. And maintenance is also convenient.
상기와 같은 본 발명은, 시스선에 리액터의 용량을 넘어서는 과전류가 유기되더라도 입력측에 직렬로 연결된 퓨즈가 단선되어 과전류에 의한 억제장치의 파손을 방지할 수 있고, 침입된 과전류는 리액터와 병렬로 연결된 피뢰기를 통해 대지로 원활하게 흐르기 때문에, 송전선로에 전력사고가 발생되는 것을 방지할 수 있다. In the present invention as described above, even if an overcurrent exceeding the capacity of the reactor is induced in the sheath line, the fuse connected in series to the input side is disconnected to prevent breakage of the suppressor due to the overcurrent, and the intruded overcurrent is connected in parallel with the reactor. Since it flows smoothly through the arrester to the ground, it is possible to prevent the power accident to occur in the transmission line.
또한, 상기 시스전류 억제장치는 그 용량 및 사이즈를 종래에 비해 현저히 작게 하더라도 안전하게 사용할 수 있어서, 지중 송전선로에 설치하기가 매우 용이하며, 유지보수도 편리한 장점이 있다. In addition, the sheath current suppression device can be safely used even if its capacity and size are significantly smaller than in the prior art, it is very easy to install in underground transmission lines, and has the advantage of convenient maintenance.
도 1은 본 발명에 따른 시스전류 억제장치의 구성도이다.1 is a block diagram of a sheath current suppression apparatus according to the present invention.
- 도면의 주요부분에 대한 부호의 설명 --Explanation of symbols for the main parts of the drawings-
1 : 입력단자 1’: 출력단자1: Input terminal 1 ': Output terminal
2 : 피뢰기 3 : 외함2: lightning arrester 3: enclosure
4 : 퓨즈 5 : 코일4: fuse 5: coil
6 : 철심 7 : 리액터6: iron core 7: reactor
Claims (3)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040016991A KR100571152B1 (en) | 2004-03-12 | 2004-03-12 | Sheath Current Suppressor for Underground Cables |
| JP2004191579A JP2005261178A (en) | 2004-03-12 | 2004-06-29 | Sheath current suppressing device for underground cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040016991A KR100571152B1 (en) | 2004-03-12 | 2004-03-12 | Sheath Current Suppressor for Underground Cables |
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| Publication Number | Publication Date |
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| KR20050091514A true KR20050091514A (en) | 2005-09-15 |
| KR100571152B1 KR100571152B1 (en) | 2006-04-17 |
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| KR1020040016991A KR100571152B1 (en) | 2004-03-12 | 2004-03-12 | Sheath Current Suppressor for Underground Cables |
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| Country | Link |
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| JP (1) | JP2005261178A (en) |
| KR (1) | KR100571152B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100889929B1 (en) * | 2007-06-20 | 2009-03-24 | 한국수력원자력 주식회사 | Structure and one side earth section of under ground cables |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2894383B1 (en) * | 2005-12-05 | 2008-10-24 | Soule Prot Surtensions Sa | IMPROVED SAFETY OVERVOLTAGE PROTECTION DEVICE AND METHOD FOR MANUFACTURING THE SAME |
| CN103414175A (en) * | 2013-07-29 | 2013-11-27 | 西安交通大学 | Short-circuit fault current limiter |
| CN107979079A (en) * | 2017-11-02 | 2018-05-01 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of four column lightning arrester connected in parallel current equalizing methods and its device |
| KR102608211B1 (en) | 2023-04-28 | 2023-11-30 | (주)선진하이테크 | Cable Sheath Induced Voltage Reducing Device |
| KR102544329B1 (en) | 2023-04-28 | 2023-06-16 | (주)선진하이테크 | Monitoring System for Cable Sheath Induced Voltage Reduction Device |
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- 2004-03-12 KR KR1020040016991A patent/KR100571152B1/en active IP Right Grant
- 2004-06-29 JP JP2004191579A patent/JP2005261178A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100889929B1 (en) * | 2007-06-20 | 2009-03-24 | 한국수력원자력 주식회사 | Structure and one side earth section of under ground cables |
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| JP2005261178A (en) | 2005-09-22 |
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