• Title/Summary/Keyword: Yoon Ho

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Multigrid DADI Method For Low Mach Number Preconditioning Method (저마하수 예조건화 기법을 위한 다중격자 DADI 기법)

  • Sung Chun-ho;Kwon Jang Hyuk;Choi Yoon-Ho;Lee Seung-Soo
    • 한국전산유체공학회:학술대회논문집
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    • 2001.10a
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    • pp.20-30
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    • 2001

  • A multigrid DADI method for low Mach number preconditioning method is presented. The eigenvalues of governing equations are modified by A low Mach number preconditioner developed by Choi & Merkle, and it results in an accurate solution and fast convergence In the low Mach number region. The convergence of numerical method is further accelerated by multigrid method. The efficient and accuracy of present method is shown by comparison with conventional solution method for the compressible flows.

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A layout planning of the Korean rural village in China (중국 한인동포 농촌마을 배치 계획)

  • Joo, Ho-Gil;Rhee, Shin-Ho;Kim, Jun-Bong;Jang, Mun-Ki;Yoon, Seong-Soo;Zhang, Cheng-Gang
    • Proceedings of the Korean Society of Agricultural Engineers Conference
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    • 2002.10a
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    • pp.141-144
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    • 2002

  • A layout planning of the rural village must consider regional, environmental and historical background, at the view of future-oriental. The study is Ryongsan-chon, that common the Korean rural village in China. It has a good environment for agriculture but lacking facilities for life. The layout plans that consider the characteristic of in-China, and Korean made out.

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Development of 60MW HVDC System Control Algorithm (60MW급 HVDC 시스템 제어 알고리즘 개발)

  • Lee, Kyung-Bin;Chung, Yong-Ho;Hwang, Ho-Yoon
    • Proceedings of the KIPE Conference
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    • 2012.11a
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    • pp.183-184
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    • 2012

  • 2010년부터 민간기업인 LS산전과 한국전력공사의 공동 개발을 통하여 60MW급 ${\pm}80kV$ HVDC (High Voltage DC transmission System)전류형 HVDC시스템 알고리즘 국산화 개발을 진행하여 2012년 3월 개발을 완료하였다. 개발된 알고리즘의 성능, 안정성 및 신뢰성을 확보하기 위하여 LS산전에서 개발한 Hardware 플랫폼에 제어 알고리즘을 탑재하고 RTDS(Real Time Digital Simulator)를 통한 연계시험을 진행하여 이를 검증하였다. 본 논문에서는 개발된 HVDC 제어 알고리즘의 기능과 RTDS연계 시험결과를 소개하고자 한다.

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