• Title/Summary/Keyword: 154kV

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A study on 154kV protective relaying systems for HTS power devices application in Korea

  • Lee, Seung-Ryul;Yoon, Jae-Young;Lee, Byong-Jun
    • Progress in Superconductivity and Cryogenics
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    • v.9 no.4
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    • pp.28-31
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    • 2007
  • This paper describes the consideration of 154kV protective relaying systems for applying HTS(High Temperature Superconducting) power devices to Korean power system. We investigates firstly 154kV relay systems of Korean power system and then do a basic study on the relay systems in the power system with superconducting devices. For the more detailed result, the study using EMTDC relay system modeling will be done from the viewpoint of superconducting devices application in the future.

Design Procedure on the Environmental Effects of Compact Tower (컴팩트 타워 전기 환경장해 발생량에 따른 설계기법)

  • Lee, Won-Kyo;Park, Chan-Hyeong;Lee, Ho-Kwon
    • Proceedings of the KIEE Conference
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    • 2011.07a
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    • pp.557-558
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    • 2011
  • 전력수요의 지속적 증가에 따라 송전설비의 추가 건설이 필요하지만 건설여건의 악화에 따라 보다 더 최적화된 송전철탑의 도입이 요구되고 있다. 이러한 문제를 해결하기 위한 방법으로 절연암을 채용한 철탑 설계 방법 및 기존 154kV 송전철탑을 활용하여 345kV 전압을 송전 할 수 있는 방안이 검토되고 있다. 송전전압이 높아지면 주변에 여러 가지 환경장해(코로나 소음, 통신선 유도 장해)를 유발하는데 이 장해 발생량은 철탑의 절연간격, 전력선의 종류 및 도체 구성방식에 따라 달라 된다. 따라서 기존 154kV 송전선로를 이용하여 345kV 송전 전압으로 격상을 위해서는 필수적으로 환경장해 유발 요인을 분석이 필요하고 환경장해를 최소화 할 수 있는 설계 기법이 요구된다. 이에 따라 본 논문에서는 기존 154kV 송전철탑을 이용하여 345kV 전압을 송전 할 때 환경장해 기준치를 만족하는 설계기법을 제시하고자 한다.

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Development of Live-line Insulator Tester and Its Application to 154kV Power Lines - Part 1 : Tester Development (활선애자점검기의 개발 및 154kV 선로에의 적용 - 제1부 : 점검기 개발)

  • Lee, Jae-Kyung;Park, Joon-Young;Cho, Byung-Hak;Oh, Ki-Yong
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.59 no.1
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    • pp.83-88
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    • 2010
  • A new live-line insulator tester was developed to detect faulty insulators in 154kV power transmission lines. This paper is the first part of the two-part paper and deals with its tester development. The developed tester has the following characteristics. First, it automates parts of the insulator inspection process by using a sensor and an actuator, and secondly, it sustains its weight by itself, not by a lineman. Finally, it measures the insulation resistance of an insulator together with its distribution voltage to provide more information for its analysis and diagnosis. These leads to the improvement of its operation efficiency, measurement reliability and usability. Its effectiveness was validated by live-line field tests in actual power lines.

Feasibility Study on the Application of 154kV HTS-FCL in Korean Power System (국내 실계통에서의 154kV 초전도한류기 계통적용 가능성 검토)

  • Lee Seung Ryul;Kim Jong-Yul;Choi Heung-Kwan;Yoon Jae Young
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.53 no.12
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    • pp.661-669
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    • 2004
  • As the load density of KEPCO system is higher, the fault current can be much higher than SCC(Short Circuit Capacity) of circuit breaker. Fault current exceeding the rating of circuit breaker is a very serious problem in high density load area, which can threaten the stability of whole power system. Even though there are several alternatives to reduce fault current, as the superconductivity technology has been developed, the HTS-FCL (High Temperature Superconductivity Fault Current Limiter) can be one of the attractive alternatives to solve the fault current problem. This study presents the application plication of 154kV HTS-FCL in Korean power system.

A Study on the Bus-Tie Application of 154kV HTS-FCL in Korean Power System (실계통에서의 154kV HTS-FCL Bus-Tie 최적 적용방안에 관한 연구)

  • Kim Jong-Yul;Yoon Jae Young;Lee Seung Rvul
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.54 no.5
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    • pp.226-233
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    • 2005
  • As the power demand has been increasing, a fault current problem is becoming more serious in real power system. Various ways like bus-split operation, transmission line open operation, are used in Korean power system for solving the problem. In this time, superconducting FCL(Fault Current Limiter) has been developed as a vary attractive alternative since HTS(High Temperature Superconductivity) was discovered. Korea, a project developing superconducting FCL to apply to 154kV transmission system is proceeding. Therefore, a power system analysis for SFCL application to power system is necessary, This paper presents the determination of quenching resistance and the selection of optimal cites when 154kV HTS-FCL is applied to Korean power system.

154kV Main TR. Bay IED Based On IEC 61850 (IEC 61850 기반의 154kV M.Tr Bay IED 적용 사례)

  • Roh, Jae-Keun;Oh, Jae-Hoon;Yang, Hang-Jun
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.11
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    • pp.2028-2034
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    • 2011
  • Substation Automation System (SAS) based on IEC 61850 is becoming more and more reality in applying power systems. As well, the development of various engineering tools and the convergence with diagnostic systems are underway. To reflect recent advancements in SAS technology, the Korea Electric Power Corporation initiated a 154kV SAS pilot project and a smart power grid business in 2010. In this paper, the authors will summarize the overview and the lessons learned in applying the IEC 61850-based 154kV Main transformer bay IED solutions to these two project.

장거리 CABLE 가압과 주변압기 단자 전압 상승

  • Jeon, Myeong-Su;Kim, Jeong-Cheol
    • Electric Engineers Magazine
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    • v.221 no.1
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    • pp.50-55
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    • 2001
  • 공사에서 공사가 완료되어 변압기의 절연저항 내압시험 등을 완료하고 이상이 없으므로 154kV/22kV 변압기를 가압하고 배전선로를 가압하는 과정에서 변압기의 단자 전압이 24.5Kv까지 상승하였다. 이때 154kV 수전단자전압은 거의 변동이 없었다.

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Development and Operation of Air Cooling System for 154kV Power Transformer (154kV 변압기 공냉형 수냉식 냉각설비 개발 및 운전)

  • Min, Byeong-Wook;Shin, Myoung-Sik;Cho, Hwan-Gu;Choi, Joon-Hyuk
    • Proceedings of the KIEE Conference
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    • 2011.07a
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    • pp.932-933
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    • 2011
  • 지속적인 경제발전 및 이상 기후변화 등으로 인한 전력수요의 지속적 증가로 2010년에 최대 66,511MW, 2011년에는 4월 현재까지 최대 68,154MW를 기록하고 있어 원활한 전력공급을 위한 전력설비의 지속적인 건설이 요구되고 있다. 그러나 건설지역 주민들의 민원 등으로 인해 건설은 갈수록 어려워지고 있는 실정이다. 한전에서는 변전소 건설의 경제성을 확보하고 변전소 건설 부지면적 및 건물면적을 최소화한 154kV Compact형 변전소를 개발하게 되었다. 이를 위해서는 변전소 면적의 상당부분을 차지하고 있는 변압기 설치면적 최소화가 필수적이다. 이를 위해 변압기 설치공간 최소화하고 냉각효율 및 민원 등을 고려한 냉매냉각방식(HCFC:Hydro Chloro Carbons, 수소화염화불화탄소)의 적용을 추진하였으나 HCFC는 오존파괴물질로 규정되어 생산과 수입이 규제될 예정으로 한전은 냉매냉각방식의 대안으로 기존 수냉식 냉각방식의 환경문제, 냉각탑 관리의 어려움 등과 물 비산에 따른 상하수도 이용요금 부담 등의 단점을 개선한 공냉형 수냉식 냉각방식을 개발하게 되었다. 본 논문에서는 154kV 변압기 공냉형 수냉식 냉각방식의 개발내용 및 운전현황에 대해 기술하고자 한다.

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A analysis result on the lightning outage and the lightning shield at 154 kV substation (154 kV 변전설비의 낙뢰사고 원인해석과 차폐검토)

  • Woo, J.W.;Shim, E.B.;Gwak, Ju-Sik;Gu, Bon-Muk;No, Yeong-Jo;Ju, Jun-Yeong
    • Proceedings of the KIEE Conference
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    • 1999.07e
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    • pp.2080-2082
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    • 1999
  • This paper describes the analysis results for the protection of lightning surge at 154 kV substation. We found that the surge arrester is needed at the inlet structure. The maximum overvoltage is 975 kV at the circuit breaker without the surge arrester at the inlet structure. This value can be lower than 600 kV by installing the surge arrestor at the inlet structure. In addition to the incoming surge from transmission line, the shield wire should be considered to prevent the shielding failure by the direct lightning stroke.

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