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제로 에너지 건축물 적용을 위한 PV 모듈의 동작 특성 연구
강병복,윤중현 대한전자공학회 2023 전자공학회논문지 Vol.60 No.8
In the BIPV system, which is the core of a zero-energy building, the PV module is integrated with the building. Since it is vulnerable to power degradation and failure caused by the structure and surrounding environment of the building, it is necessary to prevent the spread of accidents in advance through rapid failure diagnosis. In this paper, the state of the PV module was analyzed using simulation for the continuous operation and safety of the BIPV system. The virtual PV module was simulated to approximate the actual PV module, and the validity of the simulation was verified through the analysis of IV curves and FF factors. Bypass diode failures are the most dangerous and frequent PV module failures, and shading causes a decrease in the power of the PV module. In this paper, the characteristics of bypass diodes and shading were analyzed, and the status of PV modules was diagnosed through IV curves and FF factors. 제로 에너지 건축물의 핵심인 BIPV 시스템은 건물과 일체화 되어 있고, 건물의 구조와 주변 환경으로 인한 출력 저하와 고장 발생에 취약하기 때문에 신속한 고장 진단을 통해서 사고의 확산을 사전에 차단할 필요가 있다. 본 논문에서는 제로 에너지 건축물에 대한 BIPV 시스템의 지속운전과 안전성 확보을 위하여, 시뮬레이션을 통해 PV 모듈의 상태를 분석하였다. PV 모듈의 실측값에 근사하도록 가상 PV 모듈을 시뮬레이션하고 IV 곡선과 FF 인자 분석 결과, 실제 모듈과 최대 전력 특성저항이 0.14% 이내 오차로 유사하였다. PV 모듈 고장 중 가장 위험하고 발생 빈도가 높은 바이패스 다이오드의 개방 및 단락에 의한 고장 특성 분석과 PV 모듈의 출력 저하의 주요 원인이 되는 음영에 의한 특성 분석을 통해 PV 모듈의 상태진단이 가능함을 확인하였다.
딥러닝 알고리즘을 이용한 태양광발전량 예측 모델에 대한 연구
강병복,윤중현 대한전자공학회 2023 전자공학회논문지 Vol.60 No.2
In this paper, in order to predict the amount of power generation for solar energy, the prediction error rates for three deep learning algorithms were applied and tested. For the data used during the test, the parameters were optimized by extracting data from photovoltaic power generation facilities and Korea Meteorological Administration. Among the three algorithms, as a result of measuring the prediction error rate according to the weather environment, the LSTM(Long Short-Term Memory) algorithm showed excellent characteristics in common. When the meteorological environment changes, such as clouds, there is a large error between the actual power generation and the predicted power generation. In addition, when the weather is maintained at a constant level, the predicted power generation converges to the actual power generation. Through these results, it is thought that the prediction error rate between predicted power generation and actual power generation can be improved through learning of output characteristics according to various environments. 본 논문에서는 태양광에너지에 대한 발전량을 예측하기 위하여 3가지 딥러닝 알고리즘을 적용하였고, 실제 한국전력거래소에서 사용하고 있는 예측오차율을 통해 발전량을 예측오차를 산출하였다. 태양광발전설비와 기상청의 데이터 중 주요 데이터를 추출하고 파라미터를 최적화를 진행하였다. 3가지 알고리즘 중, 공통적으로 LSTM(Long Short-Term Memory) 알고리즘이 우수한 특성을 나타내었고, 구름과 같이 기상 환경이 변하는 경우에는 실제 발전량과 예측 발전량 사이에 오차가 많이 발생였지만 일정하게 기상이 유지될 경우에는 예측발전량이 실제 발전량에 수렴하는 특징을 보였다. 이러한 결과를 통해 태양발전시스템은 다양한 환경에 따른 출력특성 학습을 통해 예측발전과 실제 발전사이의 예측 오차율을 개선할 수 있을 예상된다.
탄화수소 및 불화탄화수소 혼합냉매의 기상-액상 평형에 관한 실험적 연구
강병복,김민수,김영일 대한설비공학회 2000 설비공학 논문집 Vol.12 No.11
Isothermal vapor-liquid equilibrium(VLE) data have been obtained for the systems of propane(R290)+1,1,1,2-tetrafluoroethane(R134a) and 1,1,1,2-tetrafluoroethane(R134a)+isobutane(R60A) in the temperature range of 253.15 to 323.15K. Experiments were performed in a circulation type apparatus by injecting vapor through liquid pool using a magnetic pump. Both systems form azeotropes in the temperature range of this study. The experimental results were estimated with the Peng-Robinson equation of state. When the temperature-dependent binary interaction parameter was used in the Peng-Robinson equation of state, the absolute average deviation of the measured bubble point pressures from the values correlated by the Peng-Robinson equation was 0.65% and 0.78% for R290+R134a and R134a+600a, respectively. Azeotropic compositions for both systems were presented.
강병복(Byung-Bog Kang),윤정필(Jeong-Phil Yoon),박세준(Se-Jun Park),윤필현(Pil-Hyun Yoon),임중열(Jung-Yeol Lim),차인수(In-Su Cha) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.11
Digital environment that is represented to internet is displacing business way of industry and business achievement way with the fast speed being giving great change on life whole, improve existence business process utilizing internet and Web connection technology, information superhighway to tradition industrialist manufacture and e-transformation's propulsion that wish to maximize productivity and administration efficiency is spread vigorously. In this paper, we wish to accomplish generation equipment's heighten stability and believability through remote monitoring and control of BIPV system. This paper describes the design of the monitoring system for sensing the monitoring data and indirect controlling of the BIPV system. Most of the conventional monitoring system depend on the special hardware and software.<br/> Basic design goal of monitoring system is to provide the convenience for the user and the portability for the system.<br/> In order for the system to fulfill its requirements, it was designed using Labview GUI facility based on the Windows 2000 environment of IBM PC compatible and Add-on card based on the TCP/IP protocol. Advantage of the monitoring system are a personnel expenses curtailment effect, free of the place restriction and unmanned system of the generation plants, etc.
강병복(Byung-Bok Kang),임중열(Jung-Yeol Lim),윤정필(Jung-Pil Yoon),차인수(In-Su Cha) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.-
Currently there are very limited amounts of resources and serious amounts pollution. Wind power generation system have an advantage of unlimited and unpolluted amount of energy resource. In this paper, for the application of these characteristic and for the generation to be achieved regard of districts and geographical features the energy continuously. The operation characteristics of system were analyzed through experiments for a trial product.<br/> <br/>
강병복(Byung-Bog Kang),차인수(In-Su Cha),임중열(Jung-Yeol Lim),윤정필(Jeong-Phil Yoon),박세준(Se-Jun Park) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
A guard lamp system has been installed at the PV positive center, located at Gwangju in Korea. Digital environment that is represented to internet is displacing business way of industry and business achievement way with the fast speed being giving great change on life whole, improve existence business process utilizing internet and Web connection technology, information superhighway to tradition industrialist manufacture and e-transformation's propulsion that wish to maximize productivity and administration efficiency is spread vigorously. In this paper, we wish to accomplish generation equipment's heighten stability and believability through remote monitoring and control of guard lamp system. This paper describes the design of the monitoring system for the sensing data and indirect controlling of the guard lamp system. Most of the conventional monitoring systems depend on the special hardware and software. The essential design of monitoring system is to provide the convenience for the user and the portability for the system. In order for the system to fulfill its requirements, it was designed using Labview GUI facility based on the Windows 2000 environment of IBM PC compatible and Add-oncard based on the TCP/IP protocol. Advantage of the monitoring system are a personnel expenses curtailment effect,of the place restriction and unmanned system of the generationplants, etc..