• Title/Summary/Keyword: PV Source

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A Hysteresis Current Controller for PV-Wind Hybrid Source Fed STATCOM System Using Cascaded Multilevel Inverters

  • Palanisamy, R.;Vijayakumar, K.
    • Journal of Electrical Engineering and Technology
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    • v.13 no.1
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    • pp.270-279
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    • 2018
  • This paper elucidates a hysteresis current controller for enhancing the performance of static synchronous compensator (STATCOM) using cascaded H-bridge multilevel inverter. Due to the rising power demand and growing conventional generation costs a new alternative in renewable energy source is gaining popularity and recognition. A five level single phase cascaded multilevel inverter with two separated dc sources, which is energized by photovoltaic - wind hybrid energy source. The voltages across the each dc source is balanced and standardized by the proposed hysteresis current controller. The performance of STATCOM is analyzed by connecting with grid connected system, under the steady state & dynamic state. To reduce the Total Harmonic Distortion (THD) and to improve the output voltage, closed loop hysteresis current control is achieved using PLL and PI controller. The performance of the proposed system is scrutinized through various simulation results using matlab/simulink and hardware results are also verified with simulation results.

Durability Determination and Analysis during IEC61215 PV Module Test (IEC61215을 통한 PV모듈 내구성 평가 및 분석)

  • Kim, Kyung-Soo;Kang, Gi-Hwan;Yu, Gwon-Jong
    • Proceedings of the KIEE Conference
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    • 2009.07a
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    • pp.1061_1061
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    • 2009
  • Running low of fossil fuel energy forces the industry to find a new way to overcome this energy crisis. One of the solutions is using the unlimited and everlasting energy sources like wind, sun, water, and so on. Especially, sun energy becomes the hottest issue in recent years because of its merit in installation, operation and abundant material source of silicon. In 2008, about 5.5GW photovoltaic (PV) system has been installed all around world. Many professional renewable energy organizations expect that the total PV system installation will be 30GW. To sustain the long-term stability of the PV system, several institutes perform the test based on IEC standards like IEC 61215 for silicon crystalline PV module and IEC 61646 for thin film PV module. Also in South Korea, Korea Institute of Energy Research (KIER) performs the certificate test according to IEC 61215 standards. In this paper, we want to summarize and inform the 3 years‘ test results of domestic and foreign PV modules. The specific and technical explanation will be shown in the following paper in detail.

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A Study on PV Power Generation System Adding the Function of Shunt Active Filler Using DSP (DSP를 이용한 엑티브 필터 기능 추가형 태양광발전시스템의 운전특성에 관한 연구)

  • Seo, Hyo-Ryong;Park, Young-Gil;Kim, Jong-Hyun;Park, Min-Won;Yu, In-Keun
    • Proceedings of the KIEE Conference
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    • 2006.07b
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    • pp.1169-1170
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    • 2006
  • Grid connected PV(Photovoltic) generation systems are becoming and actual and general. The power output of PV system is directly affected by the weather conditions. And when AC power supply is needed, power conversion by an inverter and a MPPT control are necessary. The PV power generation system can be treated to a harmonics source for the power distribution system. So, the PV system combined the function of active filter system can be useful applied in power distribution system. AF(Active Filters) intended for harmonic solutions are expending their functions from harmonic compensation of nonlinear loads into harmonic isolation between utilities and consumer. With the test analysis of the proposed control strategy of PV-AF system, the outcome of the test shows the stability and effectiveness of the proposed PV-AF system. The various capability of AF has been proved in previous research and usage. In this paper, authors present a DSP controlled PV-AF system for power conditioning in three-phase industrial or commercial power systems and verify it through experimental results.

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Research into The Future Development of the Hybrid System for Buoy

  • Lee, Ji-Young;Kim, Jong-Do;Lee, Jong-Ho;Lee, Jin-Yeol;Oh, Jin-Seok
    • Journal of Advanced Marine Engineering and Technology
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    • v.31 no.5
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    • pp.583-591
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    • 2007
  • This paper reports the performance of a 150W PV-wave hybrid system with battery storage in buoy. This system was originally designed to meet a new hybrid ower system for buoy in Korea. In the case or lighted buoys and lighthouses, a light failure alarm system of wireless radio is attached so that light failures are immediately notified to the office. At lighthouse offshore fixed lights and light buoys where commercial electricity is not available, the power source depends on solar system and batteries. This power system has a various problems. Therefore energy derived from the sunshine, wind and waves has been used as the energy source lot aids to navigation. Recently a hybrid system of combining the solar, wind and the wave generator is a favorable system lot the ocean facilities like lighthouse and buoy. The hybrid system in this paper is intended for variable DC load like light, communication system in the buoy and includes a PV-wane generation system and battery. This is composed a high efficiency charging algorithm, switching converter and controller. This paper includes discussion on system reliability, power quality, and effects of hybrid system in the buoy. Simulation and experimental results show excellent performance.

FPGA-based Centralized Controller for Multiple PV Generators Tied to the DC Bus

  • Ahmed, Ashraf;Ganeshkumar, Pradeep;Park, Joung-Hu;Lee, Hojin
    • Journal of Power Electronics
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    • v.14 no.4
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    • pp.733-741
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    • 2014
  • The integration of photovoltaic (PV) energy sources into DC grid has gained considerable attention because of its enhanced conversion efficiency with reduced number of power conversion stages. During the integration process, a local control unit is normally included with every power conversion stage of the PV source to accomplish the process of maximum power point tracking. A centralized monitoring and supervisory control unit is required for monitoring, power management, and protection of the entire system. Therefore, we propose a field-programmable gate array (FPGA) based centralized control unit that integrates all local controllers with the centralized monitoring unit. The main focus of this study is on the process of integrating many local control units into a single central unit. In this paper, we present design and optimization procedures for the hardware implementation of FPGA architecture. Furthermore, we propose a transient analysis and control design methodology with consideration of the nonlinear characteristics of the PV source. Hardware experiment results verify the efficiency of the central control unit and controller design.

Design of Anti-Islanding Algorithm for Utility interactive Photovoltaic System (계통연계형 태양광 발전시스템에서 역충전방지 알고리즘 설계)

  • Gho, J.S.;Kim, H.S.;Choe, G.H.;Kim, H.S.;Lee, Y.J.;You, G.J.;Song, J.S.
    • Proceedings of the KIEE Conference
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    • 1995.07a
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    • pp.440-442
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    • 1995
  • In a recently as renewable energy source photovoltaic(PV) system using solar energy has been very widely researched because of its pollution-free and infinity. Especially many researches are intensively focused on small scale utility interactive PV system which can use dead space and easily make power stabilized from unstable natural energy source. In this system one of the most important matters is islanding protection. Islanding phenomenon appears when power failure occurs. For the safety of utility interactive PV system must has the function of not only system protection but also detection of islanding. This paper describes parallel operating alghorithm using reactive power variation method and twin peak band pass filter. This alghorithm is verified useful by simulation.

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A Utility Interactive Photovoltaic Generation System using PWM Chopper and Current Source Inverter (PWM 쵸퍼와 전류형 인버터를 이용한 계통연계형 태양광발전시스템)

  • 이승환;성낙규;오봉환;검성남;이훈구;김용주;한경희
    • The Transactions of the Korean Institute of Power Electronics
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    • v.3 no.4
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    • pp.323-329
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    • 1998
  • In this paper, we compose of the utility interactive photovoltaic(PV) generation system with a PWM stepdown chopper and a current source inverter. The stepdown chopper is controlled by the several gate pulses (twice frequency of utility voltage, square pulse and without the chopper) of chopper part to reduce pulsation of DC current and size of DC reactor. PV current only is measured for maximum power point tracking without any influence on the variation of insolation and temperature. Therefore, we can control modulation factor of the chopper to operate at maximum power point of solar cell. And, the utility interactive photovoltaic generation system supplies an AC power to the load and the utility power system.

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Modeling and Simulation Analysis of Grid-Connected Photovoltaic Generation System in terms of Dynamic behavior (계통연계형 태양광발전시스템의 동특성 모델링 및 모의해석)

  • Kim, Eung-Sang;Kim, Seul-Ki
    • 한국신재생에너지학회:학술대회논문집
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    • 2005.06a
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    • pp.127-131
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    • 2005
  • The paper addresses modeling and analysis of a grid-connected photovoltaic generation system (PV system). PSCAD/EMIDC. an industry standard simulation tool for studying the transient behavior of electric power system and apparatus. is used to conduct all aspects of model implementation and to carry out extensive simulation study. An equivalent circuit model of a solar cell has been used for modeling solar array. A PWM voltage source inverter (VSI) and its current control scheme have been implemented. A maximum power point tracking (MPPT) technique is employed for drawing the maximum available energy from the PV array. Comprehensive simulation results are presented to examine PV array behaviors and PV system control performance in response to irradiation changes. In addition, dynamic responses of PV array and system to network fault conditions are simulated and analysed

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State of the Art Review of Shading Effects on PV Module Efficiencies and Their Detection Algorithm Focusing on Maximum Power Point

  • Lee, Duk Hwan;Lee, Kwang Ho
    • KIEAE Journal
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    • v.14 no.2
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    • pp.21-28
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    • 2014
  • This paper provides the up to date review of the shading effects on PV module performance and the associated detection algorithm related to the maximum power point tracking. It includes the brief explanations of the MMP variations due to the shading occurrence on the PV modules. Review of experimental and simulation studies highlighting the significant impacts of shading on PV efficiencies were presented. The literature indicates that even the partial shading of a single cell can greatly drop the entire module voltage and power efficiency. The MMP tracking approaches were also reviewed in this study. Both conventional and advanced soft computing methods such as ANN, FLC and EA were described for the proper tracking of MMP under shaded conditions. This paper would be the basic source and the comprehensive information associated with the shading effects and relevant MPP tracking technique.

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

  • Choe, Gyu-Yeong;Kim, Jong-Soo;Lee, Young-Kuk;Lee, Byoung-Kuk
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.58 no.12
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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.