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Implementation of Digitized Multi-module Solar Photovoltaic Power Conversion System
|關鍵字:||maximum power point tracking;太陽能最大功率點追蹤;on-grid mode;buck converter;inverter;digital signal processor;multi-module system;市電並聯;降壓轉換器;換流器;多模組再生能源並聯系統;數位訊號處理器||出版社:||電機工程學系所||引用:|| I. Takahashi, T. Sakurai, and I. Andoh., “Development of a Simple Photovoltaic System for Interconnection of Utility Power System,” in Proc. Int. Conf. Power Electron., Drives and Energy Syst. Ind. Growth, New Dehli, India, pp. 88-93, 1996.  J. Wang, J. Liu, L. Wu, and Z. Zhao., “Optimal Control of Solar Energy Combined with MPPT and Battery Charging,” in Proc. International Conference on Electrical Machines and Systems, Beijing, China, pp. 285-288, 2003.  W. Swiegers and J.H.R. Enslin., “An Integrated Maximum Power Point Tracker for Photovoltaic Panels,” in Proc. of Int. Symp. Ind. Eng., Pretoria, South Africa, pp. 40-44, 1998.  D.Y. Lee, H.J. Noh, D.S. Hyun and I. Choy., “An Improved MPPT Converter Using Current Compensation Method for Small Scaled PV-applications”, in Proc. Applied Power Electronics Conference and Exposition, Miami, FL, pp. 540-545, 2003.  I.H. Altas and A.M. Sharaf., “A Novel Fuzzy Logic Controller for Maximum Power Extraction From a PV Array Driving a Three-phase Induction Motor,” in Proc. Mediterranean Electrotechnical Conference, Anatalya, Turkey, pp.853-856, 1994.  C.L. Liu, “Research on the Fuzzy-Control based Maximum Power Point Tracking Technology for Photovoltaic System,” Master Thesis, Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, 2011.  M.A.S. Masoum, S.M.M. Badeiani, and E.F. Fuchs., “Microprocessor-controlled New Class of Optimal Battery Chargers for Photovoltaic Applications,” in Proc. Power Engineering Society General Meeting, Denver, Colorado, pp. 1489, 2004.  T.T. Hsu, “Design and Implementation of a DSP-based-Module-Series Grid-Connected Photovoltaic System,” Master Thesis, Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, 2010.  H.T. Hsieh, “Study and Implementation of a DSP-Based Stand-Alone Photovoltaic System,” Master Thesis, Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, 2009.  C. Hua, J. Lin, and C. Shen, “Implementation of a DSP-Controlled Photovoltaic System with Peak Power Tracking,” IEEE Trans. Ind. Electron., vol. 45, pp 99-107, 1998.  T. Esram and P. L. Chapman, “Comparison of Array Maximum Power Point Tracking Techniques”, National Science Foundation ECS-01-34208.  S.H. Lee, “DSP-Based Single Phase Small Scale Photovoltaic Energy Conversion System,” Master Thesis, Department of Electrical Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan, 2003.  T.Y. Kim, H.G. Ahn, S. K. Park, and Y.K. Lee, “A Novel Maximum Power Point Tracking Control for Power System under Rapidly Changing Solar Radiation,” in Proc. IEEE International Symp. Ind. Electron., 2001, pp. 1011-1014.  K. Kobayashi, H. Matsuo, and Y. Sekine, “A Novel Optimum Operating Point Tracker of the Solar Cell Power Supply System,” in Proc. 35th Annual IEEE Power Electron. Specialists Conf., 2004, pp. 2147-2151.  S. Yuvarajan and S. Xu, "Photo-voltaic Power Converter with a Simple Maximum-Power-Point-Tracker," in Proc. 2003 International Symp. Circuits and Syst., 2003, pp. III-399-III-402.  F.S. Sun, Study of High Performance PV System, Doctoral Dissertation, Department of Mechanical Engineering, National Taiwan University, 2005.  林容益， “TMS320F281X系統DSP數位化機電控制”，全華圖書股份有限公司，2008。  W. Xiao, N. Ozog, and W. G. Dunford, “Topology Study of Photovoltaic Interface for Maximum Power Point Tracking,” IEEE Transactions on Industrial Electronics, vol.54, no.3,pp. 1696-1704,2007.  M.L. Lin, “A DSP-based Single-stage MPPT Inverter and Grid-connected Techniques,” Master Thesis, Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, 2010.  M.H. Rashid, Power Electronics 3rd ed., Prentice Hall, 2004.  D.W. Hart, Introduction to Power Electronics, Free Press, 1998.  W.C. Chiou, “Digital Control for Grid-Connected Inverters,” Master Thesis, Department of Electrical Engineering, National Chung Cheng University, Chiayi , Taiwan, 2008.  B.S. Wang, “Development of a DSP-Based Controllable Converter for Wind Turbine and Solar Hybrid Power Conversion System,” Master Thesis, Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, 2009.  C.H. Lee, “A Design and Implementation of a Small Scale Photovoltaic Energy Conversion System,” Master Thesis, Department of Electrical Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan, 2002.  R.C. Chang, “Digital Control for Bi-directional Inverter under Power Factor Correction Mode,” Master Thesis, Department of Electrical Engineering, National Chung Cheng University, Chiayi, Taiwan, 2010.  C.L. Huang,” Design and Implementation of Converter for Grid-Connected Single-Phase Photovoltaic Energy Conversion System,” Master Thesis, Department of Electrical Engineering, National Yunlin University of Science and Technology, Yunlin, Taiwan, 2008.||摘要:||
This thesis investigates the solar cell energy generation system from the maximum power point tracking (MPPT) to parallel utility system conversion aimed at improving disadvantages of the traditional single solar cell module by developing a multi-module power supply system. The system not only improves the power supplying efficiency of the single solar cell module, but also strengthens the stability of power supply. That is, if any one of solar cell packs fails, the system still works. When the solar cell system operates, the information of voltage and current of every module is acquired at each sampling instant. A design method based on the adaptive MPPT algorithm is proposed to generate the optimal power output. A DSP-based control system for synchronization of plural AC power sources has also been implemented. The power supplying strategy controls the energy output from the inverter according to the value of current of each module. In which, our goal is that the higher power solar cell modules should supply more energy to the load, while the lower power solar cell modules supply less energy. That means that the higher power sources plays as the master energy supplier, while the lower one serves as the slave supplier. If there is insufficient energy to the load demanded then the utility power will be joining the network. Efficiency of this control scheme would be significant under the condition of heavy load.
In this thesis, simulation not only is conducted in the MATLAB environment for verifying the MPPT strategy, but also utilizing SIMPLIS to analyze parallel utility as the reference for the experiment of parallel power supply. In the control unit, a digital signal processor is used as the core of the multiple power control system. The strategy for power supply control and current detection are all accomplished in the DSP control board. Thus, our can gain better readability of the control strategy and reduce the cost of hardware.
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