• Title/Summary/Keyword: 배전선로

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The Installation Technique of Grounding Electrode Conductors for Metal Oxide Distribution Surge Arresters (배전용 피뢰기의 접지도선 설치기법)

  • Lee, B.H.;You, I.S.;Lee, T.R.;Ahn, C.H.;Youn, J.S.;Youn, H.H.;Kim, J.S.;Kim, J.C.
    • Proceedings of the KIEE Conference
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    • 2001.07c
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    • pp.1718-1720
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    • 2001
  • The route of surge arrester connection is very important because bends and kinds of leads increase the impedance to lightning surges and tend to nullify the effectiveness of a grounding electrode conductor. There is a need to know how effective installation of lightning surge arresters is made in order to control voltage and to absorb energy at high lightning currents. The effectiveness of a grounding conductor and bonding for 18[kV] metal oxide distribution line arresters was experimentally investigated with lightning and oscillating impulse voltages.

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The Development Plan of the Protection Device Auto-coordination Program in the Distribution Automation System (배전자동화 적용선로 보호기기 자동정정 프로그램 개발)

  • Kang, Moon-Ho;Ha, Bok-Nam;Lim, Seong-Il;Cho, Nam-Hun;Lee, Heung-Ho
    • Proceedings of the KIEE Conference
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    • 2001.05a
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    • pp.129-131
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    • 2001
  • In order to improve the reliability of power service and the effective management of distribution power system. DAS (Distribution Automation system) is widely used in KEPCO(Korea Electric Power Corporation) branch offices. Based on the present protective device coordination program which used in KEPCO. this study presents the new concept about both protective device coordination program maximizing the characteristics of DAS and development plan of protective device auto-coordination program with the merits of DAS.

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An Exper System for Dignosis of Fault Location on Electric Power Distribution System (배전 계통에서의 고장점 진단 전문가 시스템 개발)

  • Jin, B.G.;Lee, D.S.;Lee, S.J.;Kang, S.H.;Choi, M.S.;Ahn, B.S.;Yoon, N.S.
    • Proceedings of the KIEE Conference
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    • 2001.05a
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    • pp.319-321
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    • 2001
  • When the fault occurred at distribution system, the restoration was late. There are 2 reasons The one is the error of fault location the other is multiple possible candidates of fault location. This paper presents two of new techniques for diagnosing fault regions. The proposed diagnosis scheme is capable of accurately identifying the location of fault upon its occurrence. based on the integration of information available from protective devices and measured load current change at the substation. In this paper expert system for real fault region is presented using these facts. Testing of the developed system using EMTP Simulation Model has demonstrated.

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Development of Control Algorithm of D-STATCON(Distribution STATic-CONden: Compensations of Voltage Flicker and Harmonics (전압 플리커 및 고조파 보상을 위한 배전용 STATCON의 제어알고리즘 개발)

  • Jeon, Y.S.;Oh, K.I.;Lee, K.S.;Choo, J.B.
    • Proceedings of the KIEE Conference
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    • 1999.07c
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    • pp.1282-1286
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    • 1999
  • This paper presents the DQ transfomation and space vector modulation method to develop a control algorithm of distribution STATCON(STATic CONdenser) for line voltage regulation, dc link voltage regulation and harmonics compensation. The Performance analysis of a PI with ramp comparision and synchronous reference frame current controller is carried out. Based on these analysis, the control performances are desirable to compensate the harmonics and to regulate de link and line voltage of Distribution line.

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Field Demonstration of the Distribution STATCON-Installation & Evaluation (배전용 STATCON 설치 사례-설치 및 평가)

  • Cha, J.D.;Kim, J.M.;Hong, S.W.;Lee, H.S.;Lee, K.S.;Oh, K.I.
    • Proceedings of the KIEE Conference
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    • 1999.07f
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    • pp.2641-2643
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    • 1999
  • This paper describes the first field demonstration of the distribution STATCON in Korea including installation and its evaluation for improving power quality in distribution system. The purpose of installation is to verify functionally the voltage source inverter based equipment for voltage regulation and harmonic mitigation in distribution line. The operational data resulting from field test and the site figure are included.

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A Study on the Improvement of ZnO Varistor for Distribution Class Surge Arrester(18kV, 5kA) (배전급 피뢰기(18kV, 5kA)용 산화아연바리스타의 성능향상에 관한 연구)

  • Yoo, Deok-Son;Yoon, Han-Soo;Kim, Suk-Soo;Choi, Yeon-Gyu;Jang, Sung-Do
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2003.07b
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    • pp.744-746
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    • 2003
  • A ZnO varistor with reference voltage 250V/mm was fabricated through the control of particle size in slurry and the variation of sintering conditions. It was found that to measure the flatness of the V-I characteristic curve in the small-current region and the flatness of the V-I characteristic curve in a large-current region was improved nonlinearity of the fabricated ZnO varistor. According to the IEC 60099-4 was measured the accelerated aging test and high current test of the distribution class surge varistor which is excellent in respect to the property of ZnO varistor.

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Transferred OverVoltages on LV sides in Multigrounded Neutral during Line to Ground Fault on Distribution Systems (배전계통의 고저압 혼촉고장시 중성선 전위상승에 따른 저압기기 스트레스 전압)

  • Choi, Sun-Kyu;Choi, Jong-Kee;Kim, Kyoung-Hun;Choi, Myeong-Ho;Lee, Byung-Sung
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.61 no.6
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    • pp.910-915
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    • 2012
  • In this paper we propose multi-grounded neutral design method which was considered of transferred transient overvoltage when line to neutral fault occurs. Specially, In order to confirm the actual transient overvoltage magnitude which occurs on neutral line, we considered some screening(shielding) effects. The screening coefficient was deducted from field test results and calculation in a distribution line which is identical with an actual power line. The purpose of this paper is to attempt to suggest the guidance for grounding skystem design considering limitation of overvoltage for LV side in IEC 61936. The result is based on EMTP simulation and real field faults situation in distribution lines.

Method for Acquisition of Network Analysis Data under Inferior SCADA Signal Quality Conditions (원격 장치 신호 품질 불량 시 계통해석 데이터 취득 방안)

  • Bae, Ae-Kyoung;Kim, Young-In;Kim, Hong-Joo;Lee, Seung-Ju;Lee, Seok-Chan
    • Proceedings of the KIEE Conference
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    • 2015.07a
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    • pp.288-289
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    • 2015
  • EMS(Energy Management System: 에너지 관리 시스템)에서 SCADA(Supervisory Control and Data Acquisition: 집중원격감시 시스템)은 RTU(Remote Terminal Unit), RCC(Remote Control Centre) 등을 통해 데이터를 취득한다. 이렇게 취득된 데이터는 토폴로지(Topology)를 구성하고, 계통을 감시하고 해석하는데 사용된다. EMS에서 계통해석 기술은 발전, 송전, 변전, 배전 계통이 유기적으로 결합되어 원활한 전력의 공급과 높은 신뢰도를 제공할 수 있어야 하는데 이를 위해서는 항상 신뢰할 수 있는 데이터를 사용해야 한다. 하지만 SCADA 취득 데이터는 통신 선로 상의 지연 등 통신 오류를 포함하고 있기 때문에 항상 신뢰할 수는 없으며, 오차를 포함한 측정 데이터를 사용하여 계통 해석을 할 경우 계통 해석 결과 전체를 신뢰할 수 없게 된다는 문제점이 있다. 본 논문에서는 원격 장치 신호 품질 불량 시 계통해석 데이터를 보다 신뢰할 수 있도록 취득, 사용하는 방안에 대해 제안한다.

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The Challenges and Countermeasures of Korea Power System at 2015 Summer Peak Load (2015년 하계 최대부하시 우리나라 전력계통의 문제점 및 대책 방안)

  • Song, Tae Yong;Joo, Joon Young;Lee, Chang Gun;Kim, Sang Min;Hur, Sung Il
    • Proceedings of the KIEE Conference
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    • 2015.07a
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    • pp.333-334
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    • 2015
  • 2015년 발,송,배전 설비 신설, 변경과 최대부하82,000MW에 대비하여 우리나라 전력계통의 운영방안을 검토하였다. 고장전류를 차단기 정격 내에 유지할 수 있도록 모선분리, 선로분리 등을 적용하였고, 특히 765kV 송전선로 고장시 계통안정을 위해 수도권의 부하를 차단하는 장치를 정지하는 방안을 마련하여 수도권 계통안정에 기여하였다. 인천지역에서 나타난 과전압 및 안정도 약화에 대해 적절한 발전및 송전제약 한계값을 적용하여 인천지역의 안정 운영에도 기여하였다.

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Algorithm for Electric Vehicle Charging Aggregator Using Fuel Cell (연료전지를 이용한 전기자동차 충전Aggregator 알고리즘)

  • Park, Seung-Gil;Ryu, Jeong-Hun;Seo, Woo-Seok;Kim, Woo-Joong;Hwang, Chang-Hyun;Yoo, Young-Sang;Kang, Sang-Hee
    • Proceedings of the KIEE Conference
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    • 2015.07a
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    • pp.596-598
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    • 2015
  • 본 논문에서는 전기자동차 충전 시 예상되는 선로 과부하 문제와 전압강하 문제를 해결하기 위해 연료전지를 이용한 충전 Aggregator 알고리즘을 제안한다. 충전Aggregator 알고리즘은 충전부하 투입 알고리즘과 충전부하 제거 알고리즘으로 구성되어 있다. 충전부하 투입 알고리즘은 충전부하 투입 전 선로전력과 전압강하를 예측하여 예측 된 값들이 허용범위를 초과하지 않을 경우 충전을 시작하는 알고리즘 이고 충전부하 제거 알고리즘은 전기자동차 충전 중 일반부하의 증가로 문제 발생 시 충전부하를 제거하는 알고리즘이다. 제안된 알고리즘은 PSCAD/EMTDC를 이용해서 연료전지가 연계된 특정지역의 배전계통을 모델링하여 검증하였다.

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