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An Efficient DC-DC converter with Analog MPPT controller for the stand alone Photo Voltaic system

Author : Anto Joseph, Godwin Jam and Antony Mary

Pages : 1247-1251
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In this research article we have proposed a new hybrid bridge resonant DC-DC converter with analog MPPT controller for the photo voltaic system in stand-alone load. The output of the photo voltaic panel is unregulated DC supply due to the change in weather conditions. The maximum power is tracked with respect to the temperature and irradiance level by using DC-DC converter. The logic truth table based perturbation and observation algorithm is applied for maximum power point tracking (MPPT) purpose. This algorithm is selected due to its ability to withstand against any parameter variation and having high efficiency. The solar cell array powers the steady state energy and the battery compensates the dynamic energy in the system. The aim of the control strategy is to control the hybrid bridge resonant DC-DC converter and bi-direction DC-DC converter to operate in suitable modes according to the condition of solar cell and battery, so as to coordinate the two sources of solar cell and battery supplying power and ensure the system operates with high efficiency and behaviours with good dynamic performance. The output of DC-DC converter is converted to AC voltage by using inverter. The AC output voltage and frequency are regulated. A closed loop voltage control for inverter is done by using unipolar sine wave pulse width modulation (SPWM). The regulated AC voltage is fed to AC standalone loads or grid integration. The overall system is designed, developed and validated by using MATLABSIMULINK.

Keywords: Hybrid Bridge Resonant DC-DC converter, Photo-voltaic systems, Perturbation and observe, Analog MPPT Controller, Inverter, Bidirectional DC-DC Converter (BDC)

Article published in International Journal of Current  Engineering  and Technology, Vol.3,No.4(Oct- 2013)



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