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345[kV] 100[MVA] STATCOM 과도해석 모델 개발 및 동특성 분석
윤종수,Yoon, Jong-Su 한국조명전기설비학회 2011 조명·전기설비학회논문지 Vol.25 No.6
This paper describes the development of the transient analysis model of 345[kV] 100[MVA] STATCOM and the result of the performance analysis. The Korea power utility company, KEPCO began a commercial operation of a 100[MVA] STATCOM(Static synchronous COMpensator) at 345[kV] Migeum substation in Seoul. In order to operate a new control device like STATCOM to the power system, suitable transient model is needed. Therfore, Korea Electric Power Coporation(KEPCO) developed a transient analysis models using EMTDC/PSCAD. The development of this transient analysis model is based on the actual STATCOM S/W algorithm and H/W specification that was provided by its manufacture. Through this model, the transient/dynamic performance of STATCOM at Migeum substation can be analyzed.
윤종수(Jong-Su Yoon),김재한(Jae Han Kim),이성두(Seong-doo Lee),최장흠(Jang-Hum Choi),서보혁(Bo-hyeok Seo) 대한전기학회 2010 전기학회논문지 Vol.59 No.11
This paper describes the operation effect of FACTS devices in the Korean power system. At the year of 2010, three FACTS devices is under commercial operation in the Seoul area. Among them, 345kV ±100MVA STATCOM at Mi-Geum substation and 345kV ±200MVA SVC at Dong-Seoul substation are very close at their electrical and geographical distance. Therefore, the additional analysis including interaction and mutual transient is necessary. Therefore, a detailed EMTDC/PSCAD simulation model was developed and steady-state/transient analysis was implemented.
고등학교 ‘법과 정치’ 교과서에서의 노동인권교육 내용 분석
윤종수 ( Yoon Jong-su ),김해성 ( Kim Hae-sung ) 한국법교육학회 2016 법교육연구 Vol.11 No.2
본 연구는 고등학교 사회과 과목 중에서도 법교육을 담당하고 있는 ‘법과 정치’ 교과서의 노동인권교육 내용을 분석하여 향후 노동인권교육의 목표 실현과 교과서 개선에 도움을 주고자 하였다. 고등학교 ‘법과 정치’ 교과서의 노동인권 단원의 내용에 대하여 양적 분석을 실시하였으며, 교과서의 ‘본문’, ‘학습 활동’, ‘사진 및 삽화’ 3가지 영역에서 질적 분석을 실시하였다. 분석 결과, ‘법과 정치’ 3종의 교과서에서 노동인권을 담당하는 단원의 분량이 절대적으로 적었다. 또한, ‘내용 타당성’ 면에서 교과서들은 노동인권교육의 목표를 충실히 반영하는 데 다소 부족하였다. ‘학습 가능성’ 면에서는 학습자 수준을 고려하면 다소 어려운 측면이 있어 학습 가능성이 떨어졌다. 내용 적절성’ 면에서는 학습 영역이 지식에 편중되는 등 다소 적절하지 못한 측면이 있었다. ‘일관성’ 면에서는 사회문화현상의 실제적 반영이 다소 부실하였다. ‘법과 정치’ 교과서가 노동인권교육 목표에 충실할 수 있으려면 법조문 위주의 지식 전달보다는 학습자의 흥미와 관심을 높일 수 있도록 실제 사례 중심으로 내용을 구성하고, 학습자가 현재 경험하거나 앞으로 경험하게 될 노동 현장에서 발생하기 쉬운 노동 문제들을 폭넓게 다루어야 할 것이다. The purpose of this study is to help the improvement of labor rights education through an analysis of high school “Law and Politics” textbooks-which deals with the law education, directly addresses the labor rights. This study has performed a quantitative analysis on the labor rights unit of “Law and Politics” textbook. And then performed a qualitative analysis on the 3 domains: ‘main texts’, ‘learning activities’ and ‘photos and illustrations’ in the textbook. The results showed that the proportion of the units addressing the labor rights was too small in 3 types of “Law and Politics” textbooks. In addition, regarding Sowell``s standard of ‘validity’, the textbooks did not reflect the objectives of labor rights education faithfully. In ‘learnability’, textbooks had some difficulty considering the level of learners, which degraded the learnability. And, the textbooks lay too much importance on knowledge in learning, indicating inadequate appropriateness. In ‘consistency’, the social and cultural phenomena were inadequately reflected.
윤종수(Jong-su Yoon),정현기(Hyun-Gi Jeong),권영호(Young-Ho Kwon),신찬기(Chan-ki Shin),황동진(Dong-jin Hwang) 대한환경위생공학회 2008 대한환경위생공학회지 Vol.23 No.4
Our study indicates the zooplankton abundance with characteristics of water column and the vertical distribution in Lake Jinyang, South Korea. Seasonal changes of zooplankton community are determined by environmental parameters like water temperature, pH, dissolved oxygen, suspended solids and chlorophyll a. In lake Jinyang, this study showed that the zooplankton abundance in transition zone(St.1, St.2) was higher density than in lacustrine zone(St.3). Rotifers were dominant zooplankton and among them, Polyarthra spp., Keratella spp, and Nauplli(Copepoda) were common. But Cladoceran showed the low density. During survey period, zooplankton abundance with vertical distribution in surface layer(epilimnion) was higher than in bottom layer(hypolimninon). Zooplankton densities in Surface and middle layer showed positive relationship with water temperature and the densities in bottom layer(hypolimnion) showed positive relationship with chlorophyll a. Our assumption in spite of the short term study are supported by the facts that increase of temperature driven by climate change more maintains the thermocline duration by the summer temperature stratification. Thus the results suggest that the climate changes are an important source of changing zooplankton community feeding phytoplankton. So the zooplankton should be monitoring by the ecological management of Lake Jinyang to cope with climate changes like flood plain or drought.
윤종수(Jong-Su Yoon) 대한전기학회 2011 전기학회논문지 Vol.60 No.1
The implemetation of the AC and DC lines on the same transmission tower is an economical and practical approaching that increase the power transmission capacity of an existing transmission corridor. But, In this case, Inductive and capacitive coupling between AC and DC lines on the same tower should be investigated in advance. According to the installation plan of ±80㎸ 60MW bipole HVDC in Jeju island, KOREA that will be commissioned until 2011, DC lines will parallely operate with 154㎸ 2 AC lines in existed 154㎸ AC 4 lines transmission tower. This paper presents the transient analysis results about the interaction between 154㎸ AC and 80kV DC lines in the same transmission tower.