• Title, Summary, Keyword: EMTP/ATPDraw

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The Effects of Common Ground according to Fault Conditions in The Underground Transmission and Distribution System (고장조건에 따른 지중송배전계통에서 공통접지의 영향 분석)

  • Lim, Kwang-Sik;Lee, Jong-Beom
    • Proceedings of the KIEE Conference
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    • pp.285-287
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    • 2007
  • This paper describes that the effect on the other system is generated by the single line to ground fault of the underground transmission systems and distribution systems established the common ground in trefoil. Each system is modeled by EMTP/ATPDraw and the system carry out simulations according to the various values of common ground to analyse. In this study, the result of analysis based on simulation suggests protection method and ground system of each system.

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A Characteristic Analysis of Superconducting Fault Current Limiter in Power Systems (초전도 한류기 동작 특성에 따른 계통 영향 분석)

  • Rhee, Sang-Bong;Kim, Chul-Hwan;Kim, Kyu-Ho;Hyun, Ok-Bae
    • Proceedings of the KIEE Conference
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    • pp.207-209
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    • 2007
  • For proper application of the superconducting fault current limiter(SFCL), the prior investigation of fundamental characteristics and its effects to the distribution systems are needed. The Current limiting behavior of SFCL is dominated by quenching and recovery characteristics. So, we have developed an EMTP/ATPDraw model of resistive type SCFL using MODELS language. The operating characteristics and current limiting behaviors of SFCL in distribution systems have been simulated and investigated.

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Lightning Overvoltage Analysis and Model Establishment of XLPE Cable Underneath a Bridge on Underground Power Cable Systems (지중송전계통에서 XLPE케이블의 교량첨가시 모델수립 및 뇌과전압 해석)

  • Kim, Cheol-Ho;Lee, Jong-Beom
    • Proceedings of the KIEE Conference
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    • pp.2243-2244
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    • 2008
  • In this paper, XLPE cable underneath a bridge is modelled using EMTP/ATPDraw. Bridge section is also modelled by mutually coupled parallel conductor with XLPE cable. This paper is analysed the overvoltge by structure change of bridge section when the lightning occurs on the system.

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A Detection Scheme of a Secondary Arc Extinction Using Correlation of a Fault Voltage (고장 전압의 correlation을 이용한 2차 아크 소호 판별)

  • Jang, Won-Hyeok;Seo, Hun-Chul;Kim, Chul-Hwan
    • Proceedings of the KIEE Conference
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    • pp.340_341
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    • 2009
  • This paper suggests a detection scheme of a secondary arc extinction using the peak value of a fault voltage estimated by correlation algorithms. The system implemented in this paper is based on a Korean 765 kV system and the suggested proposed scheme is tested on the system. The performance of the method is analyzed by using Electro-Magnetic Transients Program (EMTP)/ATPDraw.

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An Analysis of the Impact of the PV generation on Fuse Coordination (퓨즈협조에 대한 태양광 발전의 영향 분석)

  • Cho, Hae-In;Seo, Hun-Chul;Kim, Chul-Hwan
    • Proceedings of the KIEE Conference
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    • pp.474_475
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    • 2009
  • Recently the grid-connected PV system is increased in the power system. According to this trend, protection coordination issues are becoming more important when the PV generation is connected to the power system. In this paper, we model the PV system using EMTP/ATPDRAW and analyze the impact of the PV generation for the fuse coordination.

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A Study on the Reclosing Operation of Distribution System considering the ESS (ESS를 고려한 배전계통 재폐로 동작에 관한 연구)

  • Seo, Hun-Chul;Kim, Chul-Hwan;Rhee, Sang-Bong
    • Proceedings of the KIEE Conference
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    • pp.583-584
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    • 2015
  • Energy Storage System(ESS) can be used as several purposes such as uninterruptible power supply (UPS), frequency regulation, maximum load cut, and etc. This paper analyzes and simulates the reclosing operation in distribution system with ESS for frequency regulation and maximum load cut. To solve the effect from ESS, two sequences in reclosing process are added to conventional reclosing. The modelings and simulations of reclosing operation using EMTP/ATPDraw are performed.

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A Study on a Fault Location Algorithm Using Wavelet Transform in Combined Transmission Systems (혼합송전계통에서 웨이브렛 변환을 이용한 고장점 탐색 알고리즘에 관한 연구)

  • Jeong, Chae-Gyun;Lee, Jong-Beom;Yun, Yang-Ung
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.51 no.5
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    • pp.247-254
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    • 2002
  • This paper describes a fault location algorithm in real combined transmission systems with underground power cable. The algorithm to calculate the fault location was developed using DWT wavelet transform and travelling wave occurred at fault point. And the proposed algorithm is also used the transient signal of one end in stead of the signal information of two ends. On the other hand, in this papers, the method to discriminate fault point between overhead line and cable section is also Proposed. Variety simulations were carried out to verify the accuracy and effectiveness of the proposed algorithm using EMTP/ATFDraw and Matlab. Simulation results show that the proposed method has the excellent ability for discrimination of fault section and fault location in combined transmission systems with power cables.

The Modeling of 3 Phase DC-DC Buck Converter for EV Charging System using EMTP (EMTP를 이용한 전기 자동차 급속 충전기용 3상 DC-DC buck Converter 모델링)

  • Shin, Se-Ri;Ju, Seong-Chul;Shim, Hyong-Wook;Lee, Jae-Won;Kim, Chul-Hwan
    • Proceedings of the KIEE Conference
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    • pp.87-88
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    • 2011
  • 전기 자동차는 내연기관 차량을 대체할 차세대 그린카의 대표 차종으로 부각되고 있다. 전기 자동차가 상용화되기 위해서는 전기자동차 자체의 성능뿐만 아니라 충전 인프라 발전이 함께 이뤄져야 한다. 현재 개발된 전기 자동차의 경우 충전 시간이 긴 반면 주행 거리가 짧기 때문에 효용성이 크게 떨어진다. 따라서 충전 시간을 최대한 단축 시키기 위한 급속 충전 시스템 개발이 활발하게 진행되고 있다. 본 논문에서는 전기 자동차용 급속 충전기에 적용되는 실제적인 DC-DC 컨버터를 ATPDraw/MODELS를 이용해 모델링하고 검증하였다.

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An Analysis of Recloser Operation According to Recovery Characteristics of Superconducting Fault Current Limiter (초전도 한류기의 회복특성에 따른 재폐로 동작 분석)

  • Rhee, Sang-Bong;Kim, Chul-Hwan;Kim, Kyu-Ho;Kim, Jae-Chul;Hyun, Ok-Bae
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.58 no.5
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    • pp.905-910
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    • 2009
  • For proper application and operation of a SFCL(Superconducting Fault Current Limiter) in distribution systems, the prior investigation of fundamental characteristics and its effects analysis to the systems are very important. A point of view in coordination with recloser in distribution systems, characteristic about quenching and recovering of SFCL should be studied. Especially, its detailed study of recovery characteristic is particularly important to avoid conflict between the SFCL and the recloser. In this paper, the resistive type SFCL and recloser, which used in distribution system, were implemented using EMTP/ATPDraw and MODELS language. To analyze the recovery characteristics of SFCL according to recloser operation in distribution systems, case studies have been simulated and investigated.

An Analysis of Superconducting Fault Current Limiter Operation According to Asymmetry Fault Current (비대칭 고장전류에 따른 초전도 한류기 동작 분석)

  • Rhee, Sang-Bong;Kim, Chul-Hwan;Kim, Kyu-Ho;Kim, Jae-Chul;Hyun, Ok-Bae
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.58 no.3
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    • pp.450-454
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    • 2009
  • This paper analyzes a asymmetry current with SFCL (Superconducting Fault Current Limiter) operation during transient period, when a fault occurs in power systems. The principle of asymmetry current nature is reviewed and asymmetry components reduction with SFCL operation is explained. To verify the performance of SFCL, a EMTP/ATPDraw model of SFCLs using MODELS language developed and simulated. Throughout the simulation, results presents the main factors for reducing the asymmetry component of fault current are not a quenching time, but a limiting resistance of SFCL and fault initiated angle.