• 제목/요약/키워드: stand-alone photovoltaic system

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풍력.태양광 복합 발전 시스템 개발 및 모니터링에 관한 연구 (The study for developing Wind and Photovoltaic power hybrid generation system and monitoring)

  • 박근현;강철웅;임종환;박의장
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2010년도 춘계학술대회 초록집
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    • pp.183.1-183.1
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    • 2010
  • Recently, the increased interest in environmental issues has led to extensive research for development of green energy generation systems. However, only one type of generation system may not be sufficient for stand-alone mode because it cannot cope with the irregularity of weather condition. A hybrid generation system is able to make up for the weakness of each system. In this paper, a stand-alone hybrid wind/PV system is developed that can guarantee the stable energy supply. The system is suitable for power supply under 50W, and a vertical savonius type of blade was designed and applied for the wind generation system.

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유목민들을 위한 PV & Battery용 DC-DC 컨버터의 통합제어 알고리즘 (Combined Control Algorithm for a DC-DC Converter of PV & Battery for Mongolian Nomadic Life)

  • 투덴수런 오운자르갈;레덧탕;박민원;유인근
    • 한국산업정보학회논문지
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    • 제23권1호
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    • pp.23-29
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    • 2018
  • 독립형 태양광(PV) 시스템은 몽골 유목민 목축업자들에게 가장 중요한 에너지발전 시스템 중 하나이다. 기본적으로 독립형 PV 시스템은 두 개의 DC-DC 컨버터를 사용한다. 이 시스템은 비용이 많이 들고, 사이즈가 커지기 때문에 다른 장소로 이동 할 때 큰 어려움이 있다. 본 논문에서는 배터리의 SOC 제어 와 최대전력추종제어가(MPPT) 결합된 제어 알고리즘을 제안한다. 배터리는 3단계(Bulk, Absorption, Float Charge)로 충 방전된다. 본 논문에서는 Bulk단계에서 MPPT제어 기반으로 충전되는 제어 알고리즘을 제안한다. 제안된 제어 알고리즘을 다양한 날씨 조건에 대해서 적용하였으며, PSIM 소프트웨어를 이용한 시뮬레이션을 통하여 그 효용성을 검증하였다. 본 논문에서 제안한 알고리즘은 몽골 유목민들의 농촌 생활에 필수적인 독립형 태양광 발전 시스템을 설계하는데 유용하게 사용될 것이다.

부조일에 따른 독립형 태양광 풍력 복합발전 시스템에서 전기저장장치의 경제성에 관한 연구 (A Study on the Economic of Electrical Storage Device of Stand Alone PV/Wind Hybrid System Based upon Sunless Days)

  • 최병수;김재철
    • 조명전기설비학회논문지
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    • 제26권3호
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    • pp.16-23
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    • 2012
  • This paper relates to a study on the economic of electrical storage device for supplying power in sunless days, in the stand alone PV/Wind hybrid system, which it is applied to separate houses. In a photovoltaic/wind hybrid power system used in a separate house, when only the battery is used in sunless days, the capacity of the battery is become larger. For example, as in recent days, if cloudy days are frequent due to anomaly climate, it is difficult to supply power stably by only the battery based upon pre-estimated sunless days. Accordingly, in order to supply stably power of new renewable energy such as solar to any separate houses, it is preferable to reduce the capacity of battery by decreasing the number of sunless days when estimating the capacity of battery and to drive the small generator for compensation of the power shortage.

Implementation of a Stand-alone Photovoltaic Pumping System with Maximum Power Point Tracking

  • Zhengming Zhao;Kunlun Chen;Liqiang Yuan
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2001년도 Proceedings ICPE 01 2001 International Conference on Power Electronics
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    • pp.635-638
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    • 2001
  • Photovoltaic (PV) pumping systems with maximum power point tracking (MPPT) technique aims at obtaining the highest possible power to the pump under various insolation and temperature, thus overcomes the mismatch between the photovoltaic panel and the pumping load. A simple method of tracking the maximum power points and forcing the system to operate close to these points is presented in this paper. The MC68HC908GP32 micro control unit (MCU) is employed to implement the proposed MPPT controller. Experimental results will also show the performances of the photovoltaic pumping system with the MPPT technique.

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독립형 PV시스템용 전력변환기 제어 알고리즘 (The Control Algorithm of Power-conditioner for Stand-alone PV System)

  • 정영석;강기환;김홍성;정명웅;유권종;송진수
    • 한국에너지공학회:학술대회논문집
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    • 한국에너지공학회 1998년도 추계 학술발표회 논문집
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    • pp.209-215
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    • 1998
  • This paper deals with stand-alone Photovoltaic system(SPVS) with charge and discharge controller. Main power source of SPVS are generally solar cell and battery. therefore SPVS can be classified into variable types in accordance with connection type between battery and solar cell. Mainly used one of them is direct connection type which has advantages such as simple structure and simple controller. However most big drawback of this system is energy loss by voltage disharmony between solar cell and battery. Therefore SPVS with charge and discharge controller which can operate solar cell at maximum power point is designed and analyzed by simulation in this paper.

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독립형 태양광 발전시스템의 MPPT 제어기법 특성비교 (Comparison of MPPT Control Method Characteristic for Stand-alone PV System)

  • 이용식;김남인;정성원;김재현
    • 전기학회논문지
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    • 제61권1호
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    • pp.75-79
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    • 2012
  • Maximum power point tracking(MPPT) techniques are used in photovoltaic systems to maximize the PV array output power by tracking continuously the maximum power point which depends on panels temperature and on irradiance conditions. This paper proposes a variable step size MPPT algorithm which can improve the MPPT speed and accuracy. Depending on insolation and temperature, the MPPT controller gives optimized step size. The effectiveness of the proposed system is verified thorough PSIM simulation and experiments on a 50[W] prototype. The experimental results confirm that the PV power of the improved P&O method is higher than that of the traditional P&O method.

Power Control modeling and Simulation of Hybrid Power System for Building Microgrid Connected Application

  • Yoon, Gi-Cap;Cho, Jae-Hoon;Hong, Won-Pyo
    • 조명전기설비학회논문지
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    • 제23권11호
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    • pp.84-93
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    • 2009
  • In this paper, we propose to study the possibility of using a photovoltaic system combined with a high speed micro-turbine. This hybrid system can work as stand-alone system or grid connected system as it will be a part of a micro-grid. Initially, we propose Matlab/Simulink dynamic models of photovoltaic, micro turbine systems and supercapacitor. Then, we carry out a simulation comparison of the two systems, this is, with supercapacitor and without supercapacitor bank. We show that supercapacitor bank as short-term storage device was necessary to reduce the fast fluctuation of power in the case of sensitive loads. It is verified the simulation results of Matlab/Simulink based hybrid power system represent the effectiveness of the suggested hybrid power system.

A Study on Photovoltaic/Wind/Diesel Hybrid Power System

  • Jeong, Byung-Hwan;Cho, Jun-Seok;Gho, Jae-Seok;Choe, Gyu-Ha;Kim, Eung-Sang;Lee, Chang-Sung
    • Journal of Power Electronics
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    • 제3권1호
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    • pp.40-48
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    • 2003
  • In this paper, a hybrid power system with photovoltaic/wind/diesel generators is proposed to solve the defect of stand-alone type power system in a remote area. A hybrid power system has a power-balanced controller to equilibrate generation power with a given load demand and which is composed of common DC power system. To execute a power-balanced control, a hybrid power system is assumed that all of power generators have the characteristics of an equivalent current-source and load sharing control technique must be needed at the same time. So this paper discusses the structure of power-balance control for hybrid power system. And through the results of simulation, the proposed scheme was verified.

독립형 태양광 발전시스템의 MPPT 제어기법 비교 (MPPT Control Method comparison of the Stand-alone PV system)

  • 이용식;김남인;정성원;김재현
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2011년도 제42회 하계학술대회
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    • pp.1386-1387
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    • 2011
  • Maximum power point tracking(MPPT) techniques are used in photovoltaic systems to maximize the PV array output power by tracking continuously the maximum power point which depends on panels temperature and on irradiance conditions. In this paper, the controller of the stand-alone PV system applicable to various fields are designed. The improved P&O MPPT and traditional P&O MPPT method was applied. This improved algorithm consists of a constant perturbation with an step control which will make easier the controller PV power data acquisition process. This strategy of control has, in first time, been validated by PSIM simulations. After, been field test. The experimental results show that the improved P&O method increased the PV output power compare to traditional P&O method.

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기후조건 및 실부하패턴을 고려한 태양광 시스템 최적 운전기법 (Photovoltaic System Operation Optimal Technique Considering Climate Condition and Residential Loads Pattern)

  • 문희성;최규영;김종수;이영국;이병국
    • 전기학회논문지
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    • 제58권12호
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    • pp.2385-2390
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    • 2009
  • Based on the detailed analysis of output characteristics of PV array and residential load usage pattern, a design method to calculate optimal battery capacity for stand-alone PV generation systems is proposed. And also, according to power flow Actual irradiation and temperature data are analyzed to compose a PV array simulator and also six representative home appliances are electrically modeled for load simulator, along with 24hours usage pattern. The surplus and insufficient power can be calculated from the proposed simulation platform, so that selection of an optimal battery capacity can be possible. The theoretical analysis and design process will be explained, along with informative simulation results.