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SPKF를 이용한 리튬 폴리머 배터리(LiPB)의 충전 상태(SOC) 관측
서보환(Bo-Hwan Seo),이동춘(Dong-Choon Lee),이교범(Kyo-Beum Lee),김장목(Jang-Mok Kim) 전력전자학회 2011 전력전자학술대회 논문집 Vol.2011 No.7
본 논문은 SPKF(Sigma-point Kalman Filter)를 이용한 리튬 폴리머 배터리(LiPB)의 충전 상태(SOC: State of Charge) 추정 방법을 제안한다. 배터리 모델은 단순화된 테브난 등가회로 모델과 Runtime 모델이 결합되어 있고, Runtime 모델의 양단 전압을 이용하여 SOC를 추정한다. 제안된 알고리즘은 시뮬레이션을 통해 그 타당성이 검증된다.
웹2.0기반의 수요자 맞춤형 농장경영S/W 서비스 개선 방안에 관한 연구
심근섭(Keun-Seop Shim),고현석(Hyeon-Seok Ko),서보환(Bo-Hwan Seo) 한국IT서비스학회 2011 한국IT서비스학회 학술대회 논문집 Vol.2011 No.9
In the current scenario of rapidly changing world, agricultural management has been recognized as an essential mechanism for delivering knowledge information and agricultural information. Farmers doesn't like the complicate agricultural information system and software. They want to access some agricultural management software simply and easily when they need. Moreover, We must consider management issues related to service integration, users and results-centered mind for increasing satisfaction of customer. The type of farm management has become more complex and increasingly specialized. Through this kind of specialization, farmers want to enhance their production efficiency. We surveyed " how much necessity and what kinds of farm management software does they want?". Over 86% of those surveyed were demand the proposed farm management software that will be improvement on software function for user-oriented services. The farm management software is showing an upward trend. We studied the vest service models and Web2.0 platform that will find new ways of agriculture management technology information service and farm management software.
Comparison of Different Methods for Line Impedance Estimation
Payam Alemi(알레미파얌),Bo-hwan Seo(서보환),Dong-Choon Lee(이동춘) 전력전자학회 2010 전력전자학술대회 논문집 Vol.2010 No.7
This paper surveys recent works in line impedance estimation. Inverters used in distribution system are often connected to the grid through LCL filter. Different methods are investigated for estimating the line impedance. Advantages and disadvantages with brief summary for each method are presented. Simulation results for a specified grid are shown for two main different methods and the results are compared with estimation error.