• 제목/요약/키워드: electric conductor

검색결과 351건 처리시간 0.04초

2종소도체 배열방식을 적용한 송전도체 표면전계강도 저감기법 (Decreasing Technique of the Electric-field Intensity on Transmission Conductor Surface using the Hybrid Conductor Bundle)

  • 이동일;신구용;김정부
    • 대한전기학회논문지:전기물성ㆍ응용부문C
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    • 제48권7호
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    • pp.542-549
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    • 1999
  • Corona discharges form at the surface of a transmission line conductor when the electric-field intensity on the conductor surface exceeds the breakdown strength of air. In order to decrease the electric-field intensity on the conductor surface, a new 6 conductor bundle has been studied. This bundle, hybrid conductor bundle, consists of using a larger subconductor at the bottom two conductor positions in the 6-conductor bundles of each phase of the line. The electric field on these two larger subconductors is reduced which in turn reduces the corona noise. It is shown that this is a better solution for decreasing the electric-field intensity than ether the conventional bundle or the asymmetric bundle proposed by EPRI.

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복합경량 부스바의 설계 및 제작 (Design and Fabrication of Light-Weight Composit Bus Bar)

  • 배준한;배덕권
    • 대한전기학회논문지:전력기술부문A
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    • 제55권8호
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    • pp.334-340
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    • 2006
  • Copper is widely used in electric wire, cable, conductor in electric devices. As the demand for electric power is increasing rapidly, electric power devices are getting amazingly bigger and complicated. The using of light-weight conductor can reduce the size and making cost of the electric devices. In high-frequency application, Electric current in a conductor tends to shift to the surface of the conductor, resulting in an uneven current distribution in the inner conductor. In the extreme case the current may essentially concentrate in the 'skin' of the inner conductor as a surface current. In high frequency application, therefore, inner area of copper conductor may replace with aluminum conductor, which reduces the weight of conductor. This paper describes the manufacture and evaluation of composite conductors made of copper and aluminum. The optimum extruding ratio was 16 at $300^{\circ}C$. The electrical resistance of manufactured composite bus bar was $57{\mu}{\Omega}$ at DC and $49.5{\mu}\{Omega}$ at 300Hz.

Al/Cu 복합도체 제조 및 전기적 특성 평가 (Fabrication and Electrical Evaluation of Al/Cu Composite Conductor)

  • 심기덕;조전욱;배준한;정원모;신덕수
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2005년도 하계학술대회 논문집 Vol.6
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    • pp.621-622
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    • 2005
  • Copper is widely used in electric wire, cable, conductor in electric devices. As the demand for electric power is increasing rapidly, electric power devices are getting amazingly bigger and complicated. The using of light-weight conductor can reduce the size and making cost of the electric devices. In high-frequency application, Electric current the current in a conductor tends to shift to the surface of the conductor, resulting in an uneven current distribution in the inner conductor. In the extreme case the current may essentially concentrate in the "skin" of the inner conductor as a surface current. In high frequency application, therefore, inner area of copper conductor may replace with aluminum conductor, which reduces the weight of conductor. This paper describes the manufacture and evaluation of composite conductors made of copper and aluminum.

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수밀 분할도체의 개발 (Development of water blocking segment conductor)

  • 이기수;서세종;하재청;최영훈;최봉남;조현호
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1998년도 하계학술대회 논문집 E
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    • pp.1623-1625
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    • 1998
  • At present, in case of circular conductor, various water blocking methods are in use for power cable. But, in case the shape of the conductor is sector shaped, segment conductor it was very difficult to make the water blocking segment conductor. This paper describes the developement details of the water blocking segment conductor applied with swellable powder.

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2도체 송전선로의 스페이서 취부방식 연구 (A Study on the Spacer Installation Method for 2-Conductor Bundle Transmission Lines)

  • 민병욱;김우겸;최한열;박기용;김원진;박재웅
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2008년도 제39회 하계학술대회
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    • pp.333-334
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    • 2008
  • Overhead transmission lines are classified by the number of sub conductors per phase. Korean transmission lines use two, four, or six-conductor bundle. Bundle of conductors must have spacers or spacer dampers which keep the proper distance between sub conductors. They can prevent conductors from being vibrated or twisted due to the wind. As for the two-conductor bundle, alternating current flow generates absorption force between sub conductors which may cause a collision of sub conductors. To prevent sub conductors from being vibrated, twisted, and collided, spacer or spacer damper installation method is designed considering vibration characteristics of sub conductors. We have spacer installation method for four or six-conductor bundle lines. However, we don't have it for two-conductor bundle ones. So we have installed spacers at regular intervals in two-conductor bundle lines, and it caused rigid body oscillation of conductors due to the wind which made a flashover between conductors. This paper introduces a vibration characteristic analysis of two-conductor bundle and proposes a spacer installation method for two-conductor bundle lines.

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코로나 잡음 특성을 고려한 초고압 송전선의 다중도체배열방식 연구 (A Study on Multi-conductor Bundle for EHV Transmission Line Considering Corona Noise Characteristics)

  • 민석원;박종근
    • 대한전기학회논문지
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    • 제39권5호
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    • pp.508-515
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    • 1990
  • This paper describes the corona characteristics of conductor bundle for EHV transmission line. To reduce the corona noise, the asymmetric conductor bundle to minimize the electric field of the conductor surface is proposed. The charge simulation method is used to formulate the electric field of conductor surface and the optimal arrangement of subconductor to minimize it is selected to apply the nonlinear successive quadratic programming. Through the analytical comparison and the corona cage test, it is proved that the asymmetric conductor bundle proposed in this paper can reduce the average maximum electric field of the phase conductors and the corona noise more than the conventional symmetric conductor bundle and asymmetric conductor bundle by GE.

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Inter-Phase Transformers를 이용한 고온 초전도 케이블의 층간 전류 등분배 방안 (Uniform Current Distribution among Conductor Layers in HTS Cables Using Inter-Phase Transformers)

  • 최용선;황시돌;현옥배;임성우;박인규
    • Progress in Superconductivity
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    • 제5권2호
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    • pp.144-148
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    • 2004
  • Uniform current distribution among conductor layers in HTS cables using IPTs (inter-phase transformers) was investigated. Conventional methods for current distribution, in which resistors are inserted to conductor layers, causes additional loss. In contrast, IPTs, which use magnetic coupling, make it possible that the current in parallel circuits is distributed uniformly with any load, and minimize the loss. In this study, IPTs were designed and fabricated for examination of uniform current distribution in the conductor layers of HTS cables. The ITP was designed through calculation of its impedance that can cancel the inductance of the conduction layers. The experimental setup consisted of four IPTs and four inductors that simulate the conductor layer inductance. Each layer was designed to feed 10 A. We examined the behavior of current distribution with IPTs for various layer inductances.

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전기이중층 커패시터의 특성에 미치는 혼성 도전재의 영향 (Effect of Composite Conductor on Characteristics of Electric Double Layer Capacitor)

  • 김익준;이선영;문성인
    • 한국전기전자재료학회논문지
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    • 제17권1호
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    • pp.107-111
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    • 2004
  • This work describes the effect of composite conductor on the characteristics of electric double layer capacitor. Test cell, which was fabricated with conducting composite consisted of 80% of SPB and 20% of VGCF, exhibits the better tate capability and the lower resistance than those of the cells fabricated with single electronic conductor. These enhanced properties could be related with the decrease of contact resistance between the activated carbon powders.

코로나 케이지 내부에서의 풍소음 저감용 특수 다중도체 방식의 3차원 전계분포해석 II (3-Dimensional Analysis II on Electric Field of Special Conductor Bundle for Reducing Aeolian Noise In Corona Cage)

  • 민석원;송기현
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2001년도 추계학술대회 논문집 전력기술부문
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    • pp.399-402
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    • 2001
  • In this paper, 3-dimensional charge simulation method was applied to analyze electric field distributions of special conductor bundles equipped with spiral rods for reducing aeolian noise in a corona cage. Comparing electric field distributions of special conductor bundles in 765kV transmission tine with ones in corona case, we decide experimental voltages of special conductor bundles in corona cage.

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송전선로 가선공사용 모듈형 발받침 개발 (Development of Modular Scaffold for Overhead Transmission Line Wiring Work)

  • 민병욱;백승도;강대언;방항권;최진성;백수곤
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2006년도 제37회 하계학술대회 논문집 A
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    • pp.450-451
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    • 2006
  • The method of conductor wiring is that a messenger wire is installed, the end of the wire is connected to the conductor and a engine puller pulls the conductor. The length of one section of wiring is $3{\sim}5km$ and one group messenger wire pulls simultaneously $2{\sim}4$ group conductor, while a tensioner maintains wiring tension to prevent the deflection of the conductor. However, there are many obstacles such as roads, power lines, communication lines, buildings, farms and crops. Therefore to prevent damage from conductor deflection a staging is used. The currently used staging is scaffolding lumber which is difficult to secure and it's construction efficiency is very low because it requires a lot of time and manpower. So this study developed a insulating defense tube and pipe connecting device, and a truss structure fabrication module using steel pipe which reduces construction time and cost through a compressive and dielectric strength test.

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