• Title/Summary/Keyword: Photovoltaic power

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Operationg Characteristics of 50kW Utility Interactive Photovoltaic System (목포대학교 기숙사 30[kW]급 태양광발전시스템 발전특성)

  • Moon, Chae-Joo;Lim, Joung-Min;Cheang, Eui-Heang;Park, Sang-Jin;Park, Gui-Yeol
    • 한국태양에너지학회:학술대회논문집
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    • 2008.11a
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    • pp.53-56
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    • 2008
  • A photovoltaic panel is a device that, through the photovoltaic effect, converts luminous energy into electric energy. Photovoltaic generation system used infinity of solar energy, cost of fuel is needless and there in no air pollution or waste occurrence. This paper summarizes the results of these efforts by offering a photovoltaic system structure in 30[kW] large scale applications installed in Mokpo National University dormitory roof. The status of photovoltaic system components, are inter-connection and safety equipment monitoring system will be summarized as this article. This describes configuration of utility interactive photovoltaic system which generated power supply for dormitory. In this paper represent 30[kW] utility photovoltaic system examination result.

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A Study on the Optimal PV-module Design for Efficiency Improvement of Photovoltaic System (태양광발전시스템의 효율 향상을 위한 태양전지 모듈의 최적 설계에 관한 연구)

  • Kim, Min;Lee, Gi-Je;Lee, Jin-Seop
    • Proceedings of the KIEE Conference
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    • 2001.10a
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    • pp.328-330
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    • 2001
  • The construct of photovoltaic module array, main power source of photovoltaic system, is very important to the efficiency improvement of whole photovoltaic system. Photovoltaic modules are usually connected in series or parallel to meet power capacity required. Since output characteristics of a photovoltaic module are greatly fluctuated on the variation of insolation, temperature and its type, the maximum open circuit voltage and output operating voltage of photovoltaic module array must exist in the admissible input voltage range of inverter system under any operating conditions. In this paper, we present the selection and array method of photovoltaic modules through simulation for the coupling loss reduction between photovoltaic modules and a inverter.

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

  • 안교상;임희천;황인호;주형준
    • Proceedings of the KIPE Conference
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    • 1999.07a
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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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Auxiliary Power Supply using Photovoltaic Power Generation for Air-Conditioner (태양광발전을 이용한 에어콘의 보조운전 제어 시스템)

  • 황인호;유권종;송진수;이후기;정찬규
    • Proceedings of the Korea Society for Energy Engineering kosee Conference
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    • 1993.05a
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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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Analysis and Design of Utility Interactive Photovoltaic System with Source Side VAR Compensation (전원측 무효전력 보상기능을 갖는 계통연계형 태양광 발전 시스템의 해석 및 설계)

  • 이상용;고재석;한찬영;이정락;최규하;목형수
    • Proceedings of the KIPE Conference
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    • 1999.07a
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    • pp.591-594
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    • 1999
  • The application field of photovoltaic system has been increased widely. In the application of photovoltaic system, the utility interactive photovoltaic system(UIPVS) has benefits of not only the home energy saving in domestic system but also reduction of peak power which threaten the capacity of power plant equipment when the maximum power consumption is occurred in daytime. This paper represents the effect of the nonlinear AC load which connected to the UIPVS with parallel connection and introduces the active power filtering(APF) techniques to the UIPVS for the reactive power compensation. The enhancement of source side power quality using APF algorithm is verified using simulation.

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Design and Characteristics Analysis of a 3 kW Grid-connected Photovoltaic Power Generation System (3 kW 계통연계형 태양광 발전시스템의 설계 및 실증운전특성 분석)

  • Hwang, I.H.;Jeong, S.J.;Ahn, K.S.;Lim, H.C.
    • Solar Energy
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    • v.18 no.1
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    • pp.19-25
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    • 1998
  • This paper describes a design method and characteristics analysis of the 3 kW grid-connected photovoltaic power generation system to establish the basic application technology of photovoltaic systems. The design specification of a 3 kW photovoltaic power generation system including a DC/AC inverter is suggested to investigate the system performance for grid connection. The results of the demonstration test from February to October show that the system with utilization rate up to 17% has reliable operation characteristics and is useful for peak-shaving of utility power.

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EMTP Implementation of Power Factor Controller in Utility Interactive Photovoltaic System (EMTP를 이용한 태양광 연계 계통의 역률 제어기 구현)

  • Kim, Sang-Hyub;Rhee, Sang-Bong;Kim, Chul-Hwan;Lyu, Seung-Heon
    • Proceedings of the KIEE Conference
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    • 2008.07a
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    • pp.490-491
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    • 2008
  • A photovoltaic power generation system is one of the ideal clean energy sources increasingly replacing fossil fuel, which has many environmental problems such as exhausted gas or air pollution. As a photovoltaic generation system should meet the requirement to be connected to utility, power factor is an important factor for the high quality of power. This paper implements a power factor controller to improve the power quality of utility interactive photovoltaic system. To verify the effectiveness of the implemented power factor controller, the results by Electromagnetic Transients Program (EMTP) are presented.

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A Study on the Sub Power Generator for Photovoltaic/Wind Hybrid System (태양광/풍력 복합발전의 보조 전력발생장치 개발에 대한 연구)

  • Park Se-Jun;Yoon Pil-Hyun;Lim Jung-Yeol;Lee Jeong-Il;Cha In-Su
    • Proceedings of the KIPE Conference
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    • 2003.11a
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    • pp.247-251
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    • 2003
  • The developments of the hybrid energy are necessary since the future alternative energies that have no pollution and no limitation are restricted. Currently power generation system of MW scale has been developed. However, even photovoltaic system cannot always generate stable output with ever-changing weather condition. In this paper, sub power generator for hybrid system(photovoltaic 500[W], wind power generation 400[W]) was suggested. Sub power Generator that uses elastic energy of spiral spring to photovoltaic system was also added for the present system. In an experiment, when output of photovoltaic system gets lower than 24[V] (charging voltage), power was continuously supplied to load through the inverter by charging energy obtained from generating rotary energy of spiral spring operates In DC generator. Also, control algorithm of sub power generator is used genetic algorithm(GA).

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Outdoor Performance Evaluation of Multi-Crystalline Silicon Photovoltaic Module (다결정 실리콘 태양광 모듈의 옥외 성능 평가)

  • Lee, Yuri;Kim, Woo Kyoung;Jung, Jae Hak
    • Current Photovoltaic Research
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    • v.7 no.3
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    • pp.71-75
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    • 2019
  • Solar energy is one of the renewable energy sources. It can respond to expanding energy demand. A solar cell module is designed to have a durability that can be developed over a long period of 25 years to be installed outdoors and perform like a stable power supply. We need Standard Test Condition (STC)-based power output data before and after testing to measure the power output of existing modules. The modules are shown to reduce power output by comparing data before and after outdoor experiments regardless of whether they are indoor or outdoor. It is easy to compare the power output quantities through the module simulator in the indoor. However, it takes a lot of testing time and costs to compare the power output on outdoor in the case of a high number of modules and distance from the module simulator. It can save time and costs if we can check the power output using the data in outdoor. We have used the long-term outdoor test to find the elements out that corresponds to the reductions in power output quantities. We have conducted research that matched the actual and the tests.

The Long-term Operating Evaluation of the Grid Connected Photovoltaic System (태양광발전시스템의 장기운전에 의한 성능특성 분석)

  • Kim, Eui-Hwan;Kang, Seng-Won;Kim, Jae-Eon
    • New & Renewable Energy
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    • v.7 no.2
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    • pp.28-35
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    • 2011
  • Recently, photovoltaic systems have been devolved into much larger systems up to MW-scale. Photovoltaic industry participants give their focus on power generation capability of photovoltaic modules because their benefits can be decided from the amount of generation. The information on long-term performance change of photovoltaic modules helps to estimate the amount of power generation and evaluate the economic cost-benefits. Long-term performance of a PV system has been analyzed with operation data for 12 years from 1999 to 2010. In the first year, the amount of yearly power generation was 57.7 MWh with 13.2% capacity factor. In 2007, the amount of yearly generation was 44.3 MWh with 10.14% capacity factor, and in 2010, the amount was decreased down to 38.1 MWh with 8.7% capacity factor. The result means that long-term capacity factor has been 4.5% decreased for 12 years and that the amount of generation has been decreased 34.0% for 12 years which is 2.8 % per year. The latter capacity factor has been decreased faster than 0.20%, the average rate for 10 years. The performance decrease of the PV system is meant to be accelerated. The decrease of performance and utilization is due to aged deterioration of photovoltaic modules and lowering conversion efficiency of PCS.