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SOLAR TRACKING USING FUZZY LOGIC

SOLAR TRACKING USING FUZZY LOGIC. Presented By Megha Srikanth. An Overview. Introduction Principle of MPPT Control MPPT techniques P & O controller Fuzzy logic of MPPT control Conclusion. INTRODUCTION.

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SOLAR TRACKING USING FUZZY LOGIC

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  1. SOLAR TRACKING USING FUZZY LOGIC Presented By MeghaSrikanth

  2. An Overview • Introduction • Principle of MPPT Control • MPPT techniques • P & O controller • Fuzzy logic of MPPT control • Conclusion

  3. INTRODUCTION • This scheme is capable of following the trajectory of the sun throughout the day on a year-round basis. • Various schemes have been proposed for optimizing the tilt angle and orientation of solar collectors • The actual energy conversion efficiency of PV module is rather low

  4. PRINCIPLE OF MPPT • The photovoltaic module operation depends strongly on the load characteristics • The connection between the source and the load is considered • Furthermore the characteristics of a PV system vary with temperature and insulation

  5. Current-voltage characteristic of a PV module

  6. Photovoltaic system

  7. MPPT TECHNIQUES • Voltage feedback based methods • Current feedback based methods • Power based methods

  8. P & O CONTROLLER • Principle is to provoke perturbation by acting on the PWM duty cycle and observing the effect on the output PV power. • when dp / dv > 0 , the voltage is increased, D (k )= D (k – 1) + C • when dp / dv < 0 , the voltage is decreased, D(k ) = D(k − 1) − C .

  9. Power-voltage characteristic of a PV module

  10. Basic circuit of the boost chopper

  11. Fuzzy logic of MPPT control • They have the advantage to be robust and relatively simple to design • They do require the complete knowledge of the operation of the PV system by the designer.

  12. General diagram of a fuzzy controller

  13. Membership functions of (a) error E - (b) change of error CE - (c) duty ratio D

  14. CONCLUSION • Fuzzy controller is faster than the P&O controller in the transitional state • Presents also a much smoother signal with less fluctuations in steady state • It can provide an order more effective than the traditional controllers for the nonlinear systems

  15. REFERENCES • V. Salas, E. Olias, A. Barrado and A. Lazaro, ‘Review of the Maximum Power Point Tracking Algorithms for Stand-Alone Photovoltaic Systems’, Solar Energy Materials & Solar Cells • H. Knopf, ‘Analysis, Simulation and Evaluation of Maximum Power Point Tracking (MPPT) • F. Boehinger, ‘Self Adaptive DC Converter for Solar Spacecraft Power Supply’, IEEE

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