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김재문(Jae-Moon Kim),김양수(Yang-Su Kim),안승호(Seung-Ho Ahn),안정준(Jeong-Jun Ahn) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.11
본 논문은 조가선을 이용한 전기철도의 전력선 통신을 위한 데이터 전송 특성을 연구하였다. 최근 다양한 통신시스템이 발달함에 따라 본 논문에서는 전기철도에서 필수적인 전차선 및 조가선을 이용하여 전력선 통신에 대한 타당성 검토를 선행연구로 수행하였다. 이를 위해 우선 무가압상태에서 조가선에 신호결합기를 취부하여 양방향 데이터 통신을 구현하였다. 데이터 전송속도가 양호하게 나타났으며 이를 토대로 전력선 통신을 위한 주요 구성품을 제시하였다. 또한 전기철도 조가선을 통신 중계수단으로 이용하여 안전 정보를 전송하기 위해서 시험을 통해 전차선에서 발생하는 노이즈와 신호 감쇄 특성을 규명하였다.
전원외란 시뮬레이터를 이용한 고속전철 이선현상 모의 실험
김재문(Jae-Moon Kim),김양수(Yang-Soo Kim),장진영(Chin-Young Chang),안정준(Jeong-Jun Ahn) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
In this study, the dynamic characteristic of a contact wire and pantograph suppling electrical power to high-speed trains are investigated from an electrical response point of view. To analysis power line disturbance by induced contact loss phenomenon for high speed operation, a hardware Simulator which considered contact loss between contact wire and the pantograph as well as contact wire deviation is developed. It is confirmed that a contact wire and pantograph model are necessary for studying the dynamic behavior of the pantograph system. One of the most important needs accompanied by increasing the speed of high-speed train is reduced that an arc phenomenon by loss of contact brings out EMI. In case of a high-speed train using electrical power, as comparison with diesel rolling stock, PLD(Power Line Disturbance) such as harmonic, transient voltage and current, EMI, dummy signal injection etc usually occurs. Throughout experiment, it is verified that an arc phenomenon is brought out for simulator operation and consequently conducted noise is flowed in electric circuit by power line disturbance.
충남지역 배출원별 PM<sub>2.5 </sub>중 이온, 탄소, 원소성분의 특성 연구
신지혜 ( Ji-hye Shin ),김영민 ( Yeong-min Kim ),박천웅 ( Chun-woong Park ),안정준 ( Jung-jun Ahn ),유하나 ( Ha-na Yu ),김종숙 ( Jong-sook Kim ),정금희 ( Geum-hee Jeong ),최진하 ( Jin-ha Choi ) 한국환경분석학회 2021 환경분석과 독성보건 Vol.24 No.1
WeconductedaprincipalcomponentanalysisofPM<sub>2.5</sub>(particleswithadiameter≤2.5μm)atfoursiteslocatedinChungcheongnam-do,aprovinceofSouthKorea,todeterminethelevelofpollutionandcharacteristicsofPM<sub>2.5</sub>componentsateachemissionsource.ThefourmonitoringsitesincludedasteelcomplexnearSongsan-myeon(SS)area,apetrochemicalcomplexnearDokgot-ri(DG)area,aresidentialcomplexnearMojong-dong(MJ)area,andavillagenearNaepo(NP)area.Samplescollectedatthesesiteswereanalyzedandtheconcentrationsofmass,ion,carbon,andelementinPM<sub>2.5</sub>werecompared.ThemassconcentrationswerefoundtobethehighestinSS,followedbyMJ,DG,andNP.TheconcentrationofdominantionspecieswererecordedinaascendingorderofNO<sub>3</sub><sup>-</sup>>SO<sub>4</sub><sup>2+</sup>>NH<sub>4</sub><sup>+</sup>inMJandSO<sub>4</sub><sup>2-</sup>>NO<sub>3</sub><sup>-</sup>>NH<sub>4</sub><sup>+</sup>inSS,DG,andNP.TheresultsindicatethatMJhadthehighestNOxconcentration,whichisemittedbyautomobiles.Moreover,MJexhibitedthehighestorganiccarbonconcentrationof5.67μg/m<sup>3</sup>andelementalcarbonconcentrationof0.51μg/m<sup>3</sup>.TheanalysisoftheelementalcompositionofPM<sub>2.5</sub>indicatedasignificantlyhigherconcentrationofFe,Zn,andMninSSandAs,V,andNiinDG.DifferentcomponentanalysisresultsfromeachemissionsourcesuggesttheneedtounderstandthedistributionofpollutantsineachregionwhileestablishingmeasurestoreducePM<sub>2.5</sub>levels.