• Title/Summary/Keyword: 성정(性情)

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The Prediction and Evaluation Air Pollutants Concentration around Industrial Complex by using Atmospheric Dispersion Models -Based on ISCST3, FDM, AERMOD- (대기확산모델을 사용한 공단주변지역의 대기오염물질농도 예측 및 평가 -ISCST3, FDM, AERMOD를 중심으로-)

  • 이화운;원경미;배성정
    • Journal of Environmental Science International
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    • v.8 no.4
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    • pp.485-490
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    • 1999

  • We will calculate concentration of air pollutants using ISCST3, FDM and AERMOD of models recommended in U. S. EPA which are able to predict concentration of short term for point source, complex like industrial complex, power plant and burn-up institution. Before executing model, as analyzing computational result of many cases according to selecting of input data, we will increasing predictable ability of model in limit range of model. Especially, we analyzed three cases-case of considering various emission rate according to time scale and not, case considering effect of atmospheric pollution materials removed by physical process. In our study, after comparing and analyzing results of three model, we choose the atmospheric dispersion model reflected well the characteristic of the area. And we will investigate how large the complex pollutant sources such as industrial complex contribute to atmospheric environment and air quality of the surrounding the area as predicting and estimating chosen model.

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Analysis of the Induced Voltage on the 154kV Underground Cable (154kV 지중케이블에서 유기전압의 해석)

  • Choi, Suk-Young;Yoo, Myeong-Ho;Bai, Doo-Han;Oh, Jung-Hwan;Rim, Seong-Jeong;Kim, Jae-Chul
    • Proceedings of the KIEE Conference
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    • 1997.07c
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    • pp.1184-1186
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    • 1997

  • In this paper, we analyze the induced voltage and current in the underground transmission cable. To analyze it, we select the 154[kV] underground transmission system which is located in the city. In the case of the steady state, the single phase fault, and three phase fault in the underground cable, we analyze the induced voltage and current for an equivalent model through EMTP simulation. Also, the components of an equivalent model and the computer simulation using EMTP is described.

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A Study on the Establishment of Merging Unit Communication Test System using RTDS based on IEC61850 (RTDS를 이용한 IEC61850 기반 Merging Unit통신 테스트 시스템 구축에 관한 연구)

  • Hong, Jun-Ho;Choi, Myeon-Song;Lee, Seung-Jae;Rim, Seong-Jeong;Park, Dong-Ho
    • Proceedings of the KIEE Conference
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    • 2008.11a
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    • pp.253-255
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    • 2008

  • 병합장치(merging unit: MU)는 변류기(CT)와 변성기(VT)로부터 계측된 전류와 전압을 이더넷을 통해 샘플값(sampled value: SV) 메시지를 전송하는 IED이다. 본 논문에서는 병합장치(MU)의 통신 성능 테스트하기 위한 시스템을 구축하는 방법을 제시하였다. RTDS를 이용하여 계통을 모의하고 샘플값 메시지를 지원하는 과전류계전(OCR) IED를 구축 한 후 계통에 모의 고장을 통해 CB를 동작시킴으로서 성능을 확인하였다. 또한 상용 IED를 연결하여 CB 동작 테스트를 통해 구축한 통신 테스트 시스템의 상호운용성을 확인하였다.

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