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오성보,김일환,이상근,Oh, Seong-Bo,Kim, Eel-Hwan,Lee, Sang-Geun 한국조명전기설비학회 2006 조명·전기설비학회논문지 Vol.20 No.7
도로조명은 차량 운전자와 보행자에게 장애물을 신속 정확히 그리고 편안하게 볼 수 있는 도로의 야간 주위환경을 제공한다. 또한 밤에 도로설비 이용을 원활하게 함은 물론 교통의 흐름을 향상시켜 교통안전을 증진시키는데 목적을 두고 있다. 이 논문은 제주시내 중심가 8개 도로의 등기구 설치현황을 실측조사 하였으며 조명기구 배열방식을 고려하여 4개 도로의 조도 실측을 통하여 수평면조도와 균제도를 기준치와 비교분석하였다. 이를 토대로 제주시 주요 도심지 상가 도로에 관한 시뮬레이션으로 도로조명의 적합한 모델을 제시하였다. Fixed lighting of public ways for both drivers and pedestrians can create a nighttime environment in which people can see comfortably and can quickly and accurately identify objects on the roadway being travelled. Roadway lighting can improve traffic safety, achieve efficient traffic movement and promote the general use of the facility during darkness. The design of a roadway lighting system involves consideration of visibility, economics, esthetics, safety and environmental conditions. This paper shows estimation of horizontal illuminance and uniformity ratio by actual measurement of roadway lighting at main streets in Jejusi and evaluation of Jejusi roadway lighting conditions for modeling by computer simulation.
이상근(Lee Sang-Geun),오성보(Oh Seong-Bo),김덕구(Kim Duck-Gu) 한국조명·전기설비학회 2005 한국조명·전기설비학회 학술대회논문집 Vol.2005 No.11월
Fixed lighting of public ways for both vehicles and pedestrians can create a nighttime environment in which people see comfortably and can quickly and accurately identify objects on the roadway being travelled roadway lighting can improve traffic safety, achieve efficient traffic movement and promote the general use of the facility during darkness. The design of a roadway lighting system involves consideration of visibility, economics, esthetics, safety and environmental conditions. This paper describe estimation of horizontal illuminance by actual measurement at main streets in Jejusi. We try to evaluate Jejusi Roadway Lighting Conditions for modeling by computer simulation.
이도헌,김일환,김호민,오성보,이승민,LEE, DOHEON,Kim, Eel-Hwan,Kim, Ho Min,Oh, Sung-Bo,LEE, SEUNGMIN 한국태양에너지학회 2015 한국태양에너지학회 논문집 Vol.35 No.3
This paper presents a solution by introducing energy storage system(ESS) to solve an annual blackout due to a typhoon or electrical failure in Udo Island. This island is now receiving electrical power through undersea cables from the Jeju Island. During blackout period, ESS will supply the electricity. And it is necessary to estimate the ESS capacity and control the transient state for the operation of stable power system. For the verification of proposed method, ESS capacities have been estimated according to base load and the minimum capacity of only home appliance in Udo Island. Also, in case of restoring from the fault, the algorithm for synchronization is proposed. Finally, the simulation results by using the PSCAD/EMTDC program will show the feasibility.
풍력발전시스템이 연계된 계통의 과도안정성에 영향을 미치는 요소
김세호(Se-Ho Kim),오성보(Sung-Bo Oh),고성민(Seoung-Min Ko),안재현(Jae-Hyun Ahn),이수묵(Soo-Mook Lee),장시호(Si-Ho Jang),이효상(Hyo-Sang Lee) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
This paper reports investigation into the factors that influence the transient behavior of the wind power generation system following network fault conditions. It is shown that the critical clearing time (CCT) can be affected by various factors contributed by the host network. Such factors include capacity of wind power, power factor, the length of the interfacing line, etc. This investigation is conducted on a simulated grid-connected wind farm using Digsilent Power Factory.
전력계통의 지락사고에 대한 매트릭스형 초전도 한류기의 동작특성
오금곤(Kum-Gon Oh),조용선(Yong-Sun Cho),최효상(Hyo-Sang Choi),오성보(Seong-Bo Oh),김덕구(Deog-Goo Kim) 한국조명·전기설비학회 2009 조명·전기설비학회논문지 Vol.23 No.10
전력 계통 내에서 발생하는 과도한 고장전류의 억제를 위한 가장 이상적인 방안은 초전도 한류기이다. 초전도 한류기의 전력계통 적용을 위해 본 논문에서는 전력계통 내에서 발생하는 1선, 2선, 3선 지락사고를 모의하여 매트릭스형 초전도 한류기의 동작 특성 및 소비전력을 분석하였다. 모든 지락사고에 대해 매트릭스형 초전도 한류기는 사고 초기에는 85[%] 이상, 1주기 이후에는 95[%] 이상 고장전류를 제한시킬 수 있다는 것을 확인하였다. 또한 초전도 소자간의 임계특성의 차이를 줄여줌으로써 소비전력이 균등해진다는 것을 확인하였다. It is very important for power stability to suppress the excessive fault current happened frequently in the real power grid. The superconducting fault current limiter (SFCL) is one of the most effective ways to reduce the fault current among the facilities developed so far. In this paper, we have investigated the operating characteristics of the power grid with the SFCL according to three types such as the single, double and triple line-to-ground faults. In addition, we analyzed the consumption power of the superconducting units based on the working data of the SFCL. We confirmed that the fault current could be limited lower than its peak value to 85 percentage in initial fault condition and to 95 percentage after one cycle in the matrix-type SFCL. The consumption powers of the superconducting units were almost equal by reduction of the difference of the critical current between superconducting units element.
Back to bock 컨버터를 갖는 가변속 풍력터빈 시스템의 모델링과 해석
김일환,강경보,김재홍,문상호,오성보,김세호,Kim, Eel-Hwan,Kang, Keong-Bo,Kim, Jae-Hong,Moon, Sang-Ho,Oh, Sung-Bo,Kim, Se-Ho 한국조명전기설비학회 2005 조명·전기설비학회논문지 Vol.19 No.8
본 논문에서는 이중여자 유도발전기의 회전자에 back to back 컨버터가 채용된 가변속 풍력터빈 시스템의 모델링과 해석을 나타내었다. 제어시스템의 특성을 파악하기 위해서 시뮬레이션에서는 Psim 프로그램을 사용하여 660[kW] 의 출력정격을 갖는 시스템을 모델로 하였다. 모델링에서는 블레이드 제어 시스템 모델과 회전자와 계통선에 연결된 컨버터 시스템을 모델링 하였다. 풍속의 변화에 따라 원하는 출력을 얻을 수 있도록 피치각을 제어하여 정격풍속 이하에서도 최대출력이 발생하도록 하였고, 정격풍속 이상에서는 회전자 속도를 일정하게 하여 정격출력을 유지할 수 있도록 하였다. 또한 무효전력을 제어하여 출력의 역률을 제어하였다. 제안한 해석방법의 타당성을 검증하기 위하여 풍속변화에 따른 모델 시스템의 시뮬레이션 결과 값들과 제주행원 풍력발전 단지에서 운용되고 있는 V47 660[kW] 시스템의 실측 결과들과 서로 비교 검증하여 제안한 해석 방법의 타당성을 입증하였다. This paper presents the simulation modeling and analysis of variable wind speed turbine system(VWTS) using the doubly fed induction generator(DFIG) connected the back to back converter system in the rotor side. In the simulation, using the model system which has the 660[kW] rated power, blade control and the dual converter system are modeled for verifying the control characteristics. The VWTS is controlled by the optimal pitch angle for maximum output power under the rated wind speed, and for the rated output power over the rated wind speed. And also power factor is controlled by the reactive power. To verify the effectiveness of the proposed method, simulation results are compared with the actual data from the V47 VWTS located in Hangwon wind farm in Jeju-Do. According to the comparison of these results, this method shows excellent performance.
풍력발전단지 출력보상용 하이브리드 에너지저장장치의 용량산정
김승현(Kim Seong Hyun),진경민(Jin Kyung-Min),오성보(Oh Sung-Bo),김일환(Kim Eel-Hwan) 한국태양에너지학회 2013 한국태양에너지학회 논문집 Vol.33 No.4
This paper presents the determination method of the hybrid energy storage capacity for compensating the output of wind power when disconnecting from the grid. In the wind power output compensation, a lot of charging and discharging time with lithium-ion battery will be deteriorated the life time. And also, this fluctuation will cause some problems of the power quality and power system stability. To solve these kind of problems, many researchers in the world have been studied with BESS(Battery Energy Storage System) in the wind farm. But, BESS has the limitation of its output during very short term period, this means that it is difficult to compensat the very short term output of wind farm. Using the EDLC (Electric Double Layer Capacitor), it is possible to solve the problem. Installing the battery system in the wind farm, it will be possible to decrease the total capacity of BESS consisting of HESS (Hybrid Energy Storage System). This paper shows simulation results when not only BESS is connected to wind farm but also to HESS. To verify the proposed system, results of computer simulation using PSCAD/EMTDC program with actual output data of wind farms of Jeju Island will be presented.
제주 행원 풍력발전단지의 출력 안정화를 위한 에너지저장시스템 용량산정에 관한 연구
강명석(Kang Myeong-Seok),진경민(Jin Kyung-Min),김일환(Kim Eel-Hwan),오성보(Oh Sung-Bo),이정민(Lee Jeong-Min) 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.1
This paper presents the characteristics of power generation output at Haeng-won wind farm and how to determine the optimized ESS capacity for power stabilizing. Depend on the fluctuationrate of wind power output variation, wind farm capacity and site, power stabilization will be impacted. Therefore, we need to determine proper ESS capacity. Using the actual data of Haeng-won wind farm from 2009.3 to 2010.2., capacity of ESS was determined by moving average value. To verify the proposed algorithm, simulations are carried out with PSCAD/EMTDC program. As a result, optimal ESS capacity of Haeng-won wind farm inJ eju is estimated about 1.63 MWh.