Yudie Soeryadharma Jeen Ming, Ling

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## Yudie Soeryadharma Jeen Ming, Ling

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**Analysis of the Maximum Power Point Tracking Simulink Model in a Three-Phase**Grid-Connected Photovoltaic System Yudie Soeryadharma Jeen Ming, Ling**ABSTRACT**• Photovoltaic (PV) is one of the clean and free-pollution renewable energy, but it is an unreliable source because of the intermittent feature of weather. • Well integration of the MPPT technique with PV array model will ensure the system operates at its maximum power point at different weather conditions and solar irradiation. • This paper use the MATLAB Simulink to simulate the model.**INTRODUCTION**• Recently, the needs of renewable energy resources increase due to the fuel energy crisis and the global warming issue. Solar energy is one of the most important renewable energy • Solar energy using photovoltaic (PV) has several advantages, e.g., no noise and free pollution. • Twooperational problems, the efficiency is very low especially under low irradiation conditions and in the intermittent weather condition the electric power changes continuously.**What is MPPT and why it is needed? (Maximum power point**tracking) It is needed a controller (MPPT) to achieve the highest efficiency and provide a stable power under the intermittent weather condition • Why IC technique ? It shows good performance under the intermittent of solar irradiance The simulation result will show how good is the performance of this IC technique.**PV Model**• A solar cell basically is a p-n semiconductor junction. When exposed to light, a dc current is generated.**IC MPPT Technique**• The incremental conductance method is developed under the fact of slope of the PV array power curve is zero at the MPP IC MPPT Algorithm**Simulation under constant solar irradiance**• The maximum standard operating for constant solar irradiance is assumed to be 1000 W/m2 in the study. (A) The measured output of PV Module (B) The respond of IC MPPT tracking algorithm**Output from boost converter**Under 1000 W/m2 of solar irradiance, The duty cycle for boost converter is a constant value 0.45 and the booster convert around 92kW of power with constant ouput voltage 500 V to the PV inverter.**Comparison of the measured output of PV module with output**of boost converter The PV module provides 100kW and the boost converter convert 92kW of energy**Simulation under decreasing solar irradiance**The figure shows the decreasing solar irradiance (1000 W/m2- 800 W/m2 -250 W/m2). (A) Decreasing of solar irradiance(B) Duty cycle of boost converter**(A) The measured output of PV Module (B) The respond of IC**MPPT tracking algorithm**Output from boost converter**The figure shows the power, voltage, current of boost converter. Under (1000 W/m2- 800 W/m2 -250 W/m2) of solar irradiance, the booster convert around 92kW - 80 kW - 25 kW of power. The booster maintains the output of voltage to be 500 V to the PV inverter.**Comparison of the measured output of PV module with output**of boost converter The PV module provides 100kW (1000 W/m2) 80kW (800W/m2) 25kW (250 W/m2) and the boost converter convert 92kW, 74kW, 20 kW**Simulation under different solar irradiance**The figure A shows the variations of solar irradiance (600 W/m2- 800 W/m2 - 400 W/m2 -600 W/m2) Figure B shows the duty cycle of boost converter responding to different solar irradiance. In fact, an extreme variation of solar irradiance occur rarely.**(A) The measured output of PV Module (B) The respond of IC**MPPT tracking algorithm**Output from boost converter**The figure shows the measurement output from boost converter. The figure shows the power, voltage, current of boost converter. Under (600 W/m2- 800 W/m2 - 400 W/m2 -600 W/m2) of solar irradiance, the booster maintains output voltage to be 500 V constantly.**Comparison of the measured output of PV module with output**of boost converter The power efficiency is approximately 90%. The simulation result shows the MPPT works and respond fast and well even in any behavior of solar irradiance and also gain a high efficiency**PV module connected to grid**The simulation is under 1000 W/m2 of solar irradiance. Output voltage of PV Inverter Output voltage of load**The figure shows the voltage after connected to the grid. to**phase A-B in 25 kV voltage level. Output voltage of grid**Conclusion**• In this paper, different solar radiations is used to investigate the performance of IC MPPT. • Simulation results show the IC MPPT technique in the PV system achieves the tracking of maximum power point with acceptable system performance and fast response. • For the future, the IC technique will be a reliable MPPT to apply in the real power system because of the intermittent of solar irradiance**References**• Kun, D., Bian, X.G., Liu, H.H.,and Tao, P.,“A MATLAB-Simulink-Based PV Module Model and Its Application Under Conditions of Nonuniform Irradiance,” IEEE Trans. Energy Convers., vol. 27, no. 4, Dec. 2012. • M.H. Rashid, Power Electronic Handbook. California: Academic Press, 2001. • T. Esram and P. L. Chapman, ―Comparison of photovoltaic array maximum power point tracking techniques,” IEEE Trans. Energy Convers.,vol. 22, no. 2, pp. 439–449, Jun. 2007. • J. H. Lee, H. S. Bae, and B. H. Cho, "Advanced Incremental Conductance MPPT Algorithm with a Variable Step Size," 2006 • Hairul Nissah Zainudin, Saad Mekhilef, “Comparison Study of Maximum Power Point Tracker Techniques for PV Systems”, Cairo University, Egypt, December 19-21, 2010, Paper ID 278. • M. E. Ropp and S. Gonzalez, “Development of a MATLAB/Simulink model of a single-phase grid-connected photovoltaic system,” IEEE Trans. Energy Convers., vol. 24, no. 1, pp. 195–202, Mar. 2009. • B. Verhoeven et al.. (1998) Utility Aspects of Grid Connected Photovoltaic Power Systems. International Energy Agency Photovoltaic Power Systems, IEA PVPS T5-01: 1998. [Online]. Available: www.iea-pvps.org • Matlab and Simulink, The Mathworks, Inc. http://www.mathworks.com. • SimPowerSystems for Use with Simulink, User’s Guide, The MathWorks Inc., • Y.-T. Hsiao and C.-H. Chen, "Maximum power tracking for photovoltaic power system," in Conf. Record of the 37th IAS AnnualMeeting Ind. Applicat. Conf., 2002, pp. 1035-1040. • K. H. 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