• 제목/요약/키워드: Photovoltaic Generation

검색결과 973건 처리시간 0.04초

태양광.연료전지 복합발전 시스템의 DC/DC 컨버터 제어 시뮬레이션 (DC/DC Converter Control for Photovoltaic/Fuel Cell Hybrid Generation system)

  • 박소리;박상훈;원충연;정용채;김영렬
    • 한국조명전기설비학회:학술대회논문집
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    • 한국조명전기설비학회 2008년도 춘계학술대회 논문집
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    • pp.353-356
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    • 2008
  • This paper is proposed that the photovoltaic/fuel cell hybrid generation system for the stand-alone system. In case of the photovoltaic generation system, it depends on the weather condition, irradiation and so on... On the contrary, fuel cell has not this limitation. It can be interactive generation system between photovoltaic and fuel cell. This paper simulated stand-alone co-generation system based on the control of DC link. Moreover, 1[kw] BLDC motor system with speed and hysteresis current controller is used for the proposed system.

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Wavelength Conversion Lanthanide(III)-cored Complex for Highly Efficient Dye-sensitized Solar Cells

  • Oh, Jung-Hwan;Song, Hae-Min;Eom, Yu-Kyung;Ryu, Jung-Ho;Ju, Myung-Jong;Kim, Hwan-Kyu
    • Bulletin of the Korean Chemical Society
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    • 제32권8호
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    • pp.2743-2750
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    • 2011
  • Lanthanide(III)-cored complex as a wavelength conversion material has been successfully designed and synthesized for highly efficient dye-sensitized solar cells, for the first time, since light with a short wavelength has not been effectively used for generating electric power owing to the limited absorption of these DSSCs in the UV region. A black dye (BD) was chosen and used as a sensitizer, because BD has a relatively weak light absorption at shorter wavelengths. The overall conversion efficiency of the BD/WCM device was remarkably increased, even with the relatively small amount of WCM added to the device. The enhancement in $V_{oc}$ by WCM, like DCA, could be correlated with the suppression of electron recombination between the injected electrons and $I_3{^-}$ ions. Furthermore, the short-circuit current density was significantly increased by WCM with a strong UV light-harvesting effect. The energy transfer from the Eu(III)-cored complex to the $TiO_2$ film occurred via the dye, so the number of electrons injected into the $TiO_2$ surface increased, i.e., the short-circuit current density was increased. As a result, BD/WCM-sensitized solar cells exhibit superior device performance with the enhanced conversion efficiency by a factor of 1.22 under AM 1.5 sunlight: The photovoltaic performance of the BD/WCM-based DSSC exhibited remarkably high values, $J_{sc}$ of 17.72 mA/$cm^2$, $V_{oc}$ of 720 mV, and a conversion efficiency of 9.28% at 100 mW $cm^{-2}$, compared to a standard DSSC with $J_{sc}$ of 15.53 mA/$cm^2$, $V_{oc}$ of 689 mV, and a conversion efficiency of 7.58% at 100 mW $cm^{-2}$. Therefore, the Eu(III)-cored complex is a promising candidate as a new wavelength conversion coadsorbent for highly efficient dye-sensitized solar cells to improve UV light harvesting through energy transfer processes. The abstract should be a single paragraph which summaries the content of the article.

분산형 발전고객의 OCGR오동작 및 과부족 계량에 대한 사례연구 (A Case Study on Malfunction of OCGR and Inaccuracy of Watt-hour Meter in Distributed Generation System)

  • 신동열;박용우;차한주
    • 전기학회논문지
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    • 제57권8호
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    • pp.1349-1355
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    • 2008
  • The paper shows the analysis of operating conflict of OCGR trip events and metering errors in the photovoltaic generation, wind generation distributed generation customers with no defect of the distributed generation facilities, which are connected to 22.9kV distribution lines. To analyze problems with metering errors and OCGR fault event, a power quality analyzer and PSIM program were used to test the field and to simulate in Sun-Cheon photovoltaic generation and Seo-Cheon photovoltaic generation customers. With the trial distribution line, the result of analysis was verified to prove with the same situation of the actual field. This paper suggests short term and long term countermeasures of OCGR fault events, analysis of over and shortage of metering errors in distributed generation customers.

영농형 태양광 발전의 진단을 위한 지능형 예측 시스템 (Intelligent Prediction System for Diagnosis of Agricultural Photovoltaic Power Generation)

  • 정설령;박경욱;이성근
    • 한국전자통신학회논문지
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    • 제16권5호
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    • pp.859-866
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    • 2021
  • 영농형 태양광 발전은 농지 상부에 태양광 발전 설비를 설치하는 방식으로 농작물과 전기를 동시에 생산함으로써 농가 소득을 증대시키는 새로운 모델이다. 최근 영농형 태양광 발전을 활용하는 다양한 시도들이 이루어지고 있다. 영농형 태양광 발전은 기존의 태양광 발전과는 달리 비교적 높은 구조물 상부에 설치하게 되므로 유지 보수가 상대적으로 어렵다는 단점이 있다. 이러한 문제를 해결하기 위해 지능적이고 효율적인 운용 및 진단 기능이 요구된다. 본 논문에서는 영농형 태양광 발전 설비의 전력 생산량을 수집, 저장하여 지능적인 예측 모델을 구현하기 위한 예측 및 진단 시스템의 설계 및 구현에 대해 논한다. 제안된 시스템은 태양광 발전량과 환경 센서 데이터를 기반으로 발전량을 예측하여 설비의 이상 유무를 판별하며 설비의 노화 정도를 산출하여 사용자에게 제공한다.

태양광발전 시스템의 일사량에 따른 전력 패턴 분석 (Analysis of Power Pattern According to Irradiation for Photovoltaic Generation System)

  • 이경섭
    • 전기학회논문지P
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    • 제58권4호
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    • pp.602-608
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    • 2009
  • In this thesis, output voltage, current and power of solar module were classified by irradiation from data of overall operating characteristics collected for one year in order to manage efficient photovoltaic generation system and deliver maximum power. In addition, from these data, correlations between irradiation of photovoltaic cell and amount of power given by photovoltaic cell was quantitatively examined to deduce optimization of the design and construction of photovoltaic generation system. As I-V characteristics according to a temperature range of 10~50[$^{\circ}C$], the area of I-V characteristics were increased with an increase in temperature. Since this area corresponds to the power, output power is thought to have increased with temperature. As output power characteristics according to a temperature range of 10~50[$^{\circ}C$], output power was increased with an increase in temperature. Since output power increases with temperature increase, the result corresponds well to the related equation on temperature and output power. As I-V characteristics according to a irradiation range of 100~900 [$W/m^2$], voltage and current were increased with an increase in irradiation. The result is thought of as an increase in output power with increasing irradiation. As output power characteristics according to a irradiation range of 100~900 [$W/m^2$], output power was increased with increasing irradiation. This result corresponds well to the related equation on irradiation and output power.

중규모 태양광발전시스템 장기 실증운전 평가 (The long-term operating evaluation of the grid connected photovoltaic system)

  • 김의환;안교상;임희천
    • 한국태양에너지학회 논문집
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    • 제29권5호
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    • pp.14-19
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    • 2009
  • The 50 kWp grid connected photovoltaic system which was installed at KEPRI site in 1999 has been operated more than 10 years. In order to acquire long term operation characteristics of medium size photovoltaic system, the operation test data related on power generation electricity and capacity factor of 50 kWp system, which have been collected since 1999, were analysed. From the analysing results, 57.7 MWh in annual power generation electricity of 50 kWp photovoltaic system in 1999 has been decreased 49.1 MWh in 2005 and reached 41.9 MWh in 2008. In addition to, the capacity factor of 50 kWp photovoltaic system also showed 13.2 % in 1999, 11.2% in 2005 and finally reached 9.6% in 2008. The operation test data showed a trend of decreasing of generation electricity and capacity factor during the 10 years operation time and we guessed that was caused by solar cell performance degradation and decreasing of PCS system efficiency.

계통연계 태양광발전시스템의 제어기법 및 연계운전특성 (A control method and test results of utility interactive photovoltaic power generation systems)

  • 안교상;임희천;황인호;주형준
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 1999년도 전력전자학술대회 논문집
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    • pp.549-553
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    • 1999
  • This paper describes a design method of grid-connected photovoltaic power generation systems with three phase inverter. A 3-phase 50kW photovoltaic power generation system including a DC/AC inverter is designed and made in order to investigate the system performance for grid connection. Also the control scheme of a three phase current-controlled PWM inverter is presented by using d-q transformation. The experimental waveforms show that the proposed system has stable behavior with an unit power factor in utility-interactive operation.

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태양광발전을 이용한 에어콘의 보조운전 제어 시스템 (Auxiliary Power Supply using Photovoltaic Power Generation for Air-Conditioner)

  • 황인호;유권종;송진수;이후기;정찬규
    • 한국에너지공학회:학술대회논문집
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    • 한국태양에너지학회, 한국에너지공학회 1993년도 춘계 공동학술발표회 초록집
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    • pp.47-52
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    • 1993
  • Recently, as exactly clean source, the research of photovoltaic power generation is undertaken actively and widely. In this paper, an auxiliary power supply system which is composed of photovoltaic generation and DC-DC boost chopper is described. This system in mainly for Air-conditioner appliances is which AC source is formed through rectifying circuit and without electrical storage battery. There exist two operating modes depending on the power quantity of the solar cells and the load. The control algorithm is discussed.

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MATLAB 기반의 PLECS를 이용한 태양광 모델링 및 발전시스템 개발 (Development of Photovoltaic Modeling and Generation System using PLECS in MATLAB)

  • 최규영;김종수;이영국;이병국
    • 전기학회논문지
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    • 제58권12호
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    • pp.2379-2384
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    • 2009
  • In this paper, based on MATLAB which has characteristic that is simply applied to control algorithm and source modeling, photovoltaic modeling is implemented. Photovoltaic modeling is similarly performed PV array and simulated. Also, in order to output maximum power of PV, MPPT control is simulated. Moreover, simulation of converter is performed by means of PLECS (Piece wise Linear Electrical Simulation) which is easily made schematic of power electronics. Also, we compare simulation results and Sharp PV module and Suntech PV module. Finally, informative simulation of PV generation system is provided.

3상 계통연계 태양광발전시스템의 운전특성 (Control Characteristics of Three-Phase Utility Interactive Phovotovoltaic Power Generation System)

  • 김영철;정명웅;서기영;이현우;우준인
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
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    • 제49권8호
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    • pp.536-543
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    • 2000
  • The photovoltaic power generation system has a great future as clean energy instead of fossil fuel which has many environmental problems such as exhausted gas or air pollution. In a utility interactive photovoltaic generation system, a three-phase inverter is used for the connection between the photovoltaic array and the utility. This paper present a three phase inverter for photovoltaic power system with current controller, voltage controller, PLL Control system and the Phase detector of Interactive Voltage by using dq transformation. The proposed inverter system provides a sinusoidal ac current for domestic loads and the utility line with unity power factor.

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