• Title/Summary/Keyword: photovoltaic system

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The Monitoring System with PV Module-level Fault Diagnosis Algorithm (태양전지모듈 고장 진단 알고리즘을 적용한 모니터링시스템)

  • Ko, Suk-Whan;So, Jung-Hun;Hwang, Hye-Mi;Ju, Young-Chul;Song, Hyung-June;Shin, Woo-Gyun;Kang, Gi-Hwan;Choi, Jung-Rae;Kang, In-Chul
    • Journal of the Korean Solar Energy Society
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    • v.38 no.3
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    • pp.21-28
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    • 2018
  • The objects of PV (Photovoltaic) monitoring system is to reduce the loss of system and operation and maintenance costs. In case of PV plants with configured of centralized inverter type, only 1 PV module might be caused a large loss in the PV plant. For this reason, the monitoring technology of PV module-level that find out the location of the fault module and reduce the system losses is interested. In this paper, a fault diagnosis algorithm are proposed using thermal and electrical characteristics of PV modules under failure. In addition, the monitoring system applied with proposed algorithm was constructed. The wireless sensor using LoRa chip was designed to be able to connect with IoT device in the future. The characteristics of PV module by shading is not failure but it is treated as a temporary failure. In the monitoring system, it is possible to diagnose whether or not failure of bypass diode inside the junction box. The fault diagnosis algorithm are developed on considering a situation such as communication error of wireless sensor and empirical performance evaluation are currently conducting.

A Performance Analysis On Designed Value Of Photovoltaic System (태양광 발전시스템의 설계치에 대한 성능 비교분석)

  • So, J.H.;Yu, G.J.;Gang, G.H.;Lee, J.K.;Seok, J.K.;Choi, J.Y.
    • Proceedings of the KIEE Conference
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    • 2002.07b
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    • pp.1319-1321
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    • 2002
  • This paper compares the performances of photovoltaic system by computer simulation with those of real photovoltaic system. We evaluate the performances of photovoltaic system by computer simulation considering system parameters of system specifications, installation and surrounding conditions etc. In the future, we will intend to develop an analysis tools and construct database for optimal design of photovoltaic system

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An Experimental Study on Plant Factory System Applied Photovoltaic System and LED Lighting (태양전지와 LED 조명을 이용한 가정용식물공장 시스템 실증시험)

  • Yang, Jun-Woo;Chung, Dong-Yeol;Kim, Jeong-Yeol;Peck, Jong-Hyeon
    • Journal of Institute of Convergence Technology
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    • v.3 no.1
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    • pp.37-40
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    • 2013
  • Plant factory industry as a new agriculture is in the spotlight. In this paper, we experimented plant factory applied photovoltaic system and LED lighting. For growing the plant, red, blue and white LED were placed into 1:4:3. Electric power generated by the photovoltaic system was supplied on DC power supply instead of AC. The designed and experimented power generation amount per day of photovoltaic system were 2,860 Wh and 2,272 Wh respectively. Plant has not been grown at the dead space of LED lighting so it is required to array LED lighting.

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An Efficiency Improvement of the Photovoltaic Generation System by Using the PPT based MPPT Converter (PPT 기반 MPPT 컨버터에 의한 태양광 발전시스템의 효율 개선)

  • Lee, Eun-Chul;Lee, Seong-Ryong
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.55 no.4
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    • pp.216-223
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    • 2006
  • In this paper, a methodology for the efficiency improvement of the photovoltaic system without adding some elements or increasing the cost comparing with the conventional system is discussed. It is suggested the optimal photovoltaic module configuration through its performance analysis, and also the suitable maximum power point tracking (MPPT) voltage considered the system cost and the efficiency of the converter. The high efficiency photovoltaic system by using the parallel power transfer (PPT) based MPPT converter is proposed and analyzed theoretically comparing with the conventional Buck type MPPT converter. Finally, it is designed and implemented the proposed photovoltaic system for supplying DC 48V by using the PPT based MPPT converter. And the effect of the efficiency improvement and the usefulness of the proposed system is proved through some preliminary simulation and experiment results.

A Study on the Benefit-Cost Analysis of Photovoltaic System in the Greenhome (그린홈 적용 태양광 발전시스템의 편익비용분석에 관한 연구)

  • Jung, Soon-Sung
    • Journal of Power System Engineering
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    • v.18 no.3
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    • pp.112-117
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    • 2014
  • The purpose of this study is to suggest the benefit-cost analysis for photovoltaic system in greenhome. Perspectives of benefit-cost analysis for photovoltaic system in greenhome is participant, non-participant, administrator and nation. This study identifies the cost and benefit components and benefit-cost calculation procedures from four major perspectives : participant, non-participant, administrator and nation. The results of benefit-cost analysis from each perspective can be expressed in a variety of ways, but in all cases it is necessary to calculate the net present value of photovoltaic system impacts over the lifecycle of those impacts.

Application of Robust Controller Design to Photovoltaic System Simulator (태양광발전 시뮬레이터의 강인제어설계 응용)

  • Lee, Youn;Chun, Yeong-Han
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.59 no.2
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    • pp.267-271
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    • 2010
  • Photovoltaic system simulator is under being developed for the performance test of Power conditioning system (PCS). The photovoltaic system simulator is required to emulate real system, which can be obtained by fast response controller. In this paper, we suggest a robust control method as a tool to design the simulator controller. The performance of the controller is determined by weighting functions, sensitivity function $W_1$ complementary sensitiviey function $W_3$, and a control signal shaping function $W_u$. Experimental results show that robust control method is promising for obtaining better performance of the photovoltaic system simulator.

Analysis of Performance of Balcony Integrated PV System (발코니 일체형 태양광발전시스템의 발전성능 분석)

  • Kim, Hyun-Il;Kang, Gi-Hwan;Park, Kyung-Eun;So, Jung-Hoon;Yu, Gwon-Jong;Suh, Seung-Jik
    • Journal of the Korean Solar Energy Society
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    • v.29 no.1
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    • pp.32-37
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    • 2009
  • Photovoltaic(PV) permits the on-site production of electricity without concern for fuel supply or environmental adverse effects. The electrical power is produced without noise and little depletion of resources. So BIPV(Building-Integrated Photovoltaic) system have been increased around the world. Hereby the relative installation costs of the system will be relatively low compared to traditional installations of PV in high-rise buildings. This paper examined possibility of building integrated balcony PV system and analyzed both performance and problems of this system. The system is influenced by conditions such as irradiation, module temperature, shade and architectural component etc. If this BIPV system of 1.1kW is possible the natural ventilation in the summer case, the temperature of PV module decrease and then the efficiency of PV system increase generally. By the results, the annual averaged PR of BIPV system of cold facade type is about 74.7%.

On the Use of Maximum Likelihood and Input Data Similarity to Obtain Prediction Intervals for Forecasts of Photovoltaic Power Generation

  • Fonseca Junior, Joao Gari da Silva;Oozeki, Takashi;Ohtake, Hideaki;Takashima, Takumi;Kazuhiko, Ogimoto
    • Journal of Electrical Engineering and Technology
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    • v.10 no.3
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    • pp.1342-1348
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    • 2015
  • The objective of this study is to propose a method to calculate prediction intervals for one-day-ahead hourly forecasts of photovoltaic power generation and to evaluate its performance. One year of data of two systems, representing contrasting examples of forecast’ accuracy, were used. The method is based on the maximum likelihood estimation, the similarity between the input data of future and past forecasts of photovoltaic power, and on an assumption about the distribution of the error of the forecasts. Two assumptions for the forecast error distribution were evaluated, a Laplacian and a Gaussian distribution assumption. The results show that the proposed method models well the photovoltaic power forecast error when the Laplacian distribution is used. For both systems and intervals calculated with 4 confidence levels, the intervals contained the true photovoltaic power generation in the amount near to the expected one.

National Certified License Tests for the Facility Management of New and Renewable Energy (Photovoltaic Cell) (신재생에너지 (태양광) 설비 국가 공인 자격증 시험)

  • Jo, Min-Jung;Hwang, Un-Jei;Park, Rei-Hyan;Jo, Dong-Hyun;Kim, Jong-Do;Park, Eun-Hye;Kang, Kwang-Sun
    • Current Photovoltaic Research
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    • v.1 no.2
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    • pp.126-139
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    • 2013
  • New national certified license tests for the facility management of new and renewable energy is given from this year. There are three national certified licenses including craftsman, industrial engineer and engineer. The subjects for the craftsman are photovoltaic facility for written exam and practical business of photovoltaic facility for writing exam. The subjects for the industrial engineer are theory, construction, management and law of the photovoltaic system for written exam and practical business of photovoltaic system for writing exam. The subjects for the engineer add one more subject compared with the industrial engineer, such as design of photovoltaic system. The first tests were given in september 28 in this year. The tests will be given three in 2014.

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

  • Kim, Eui-Hwan;Ahn, Kyo-Sang;Lim, Hee-Chun
    • Journal of the Korean Solar Energy Society
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    • v.29 no.5
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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.