Call For Paper Volume:4 Issue:10 Oct'2017 |

Power Management Strategy in parallel connected PV arrays by Integrating Buck boost converter with Single phase Bidirectional Inverter

Publication Date : 30/11/2015



Author(s) :

G.RAVICHANDRAN , T.RAMESH.


Volume/Issue :
Volume 2
,
Issue 11
(11 - 2015)



Abstract :

In this project is to develop a MPPT based power management system for parallel connected PV arrays by integrating buck-boost dc-dc converter with single phase inverter. The V-I characteristic of PV array is nonlinear in which the voltage decreases with increase in current. The decrease in voltage is less until a peak point and after the peak point voltage decreases drastically. Since power is product of voltage and current, considerable output power is possible until the peak point and after the peak point the power output will be very low. In order to draw maximum power from PV panels a number of MPPT (Maximum Power Point Tracking) algorithms are developed, in which the power is drawn as long as the voltage is above peak value. When the voltage goes below peak value the PV array is disconnected for a small duration and the voltage is allowed to rise and then reconnected when the voltage attains a specified value which is above the peak value. In the proposed system the output voltage of two PV arrays are individually boosted/bucked to a high dc voltage and interfaced to a dc bus. When the PV array voltage is lesser than bus voltage boost operation is performed and when it is greater buck operation is performed. A bidirectional inverter is also interfaced to dc bus which is used for energy transfer from dc bus to ac grid and vice versa. When the dc power is excess, the inverter is used to convert excess dc power to ac power and inject to grid, and when there is deficiency in dc power the inverter is used to convert ac power to dc power and supply to dc bus. Simulation results are verified using MATLAB/SIMULINK Software.


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Power Management Strategy in parallel connected PV arrays by Integrating Buck boost converter with Single phase Bidirectional Inverter

November 30, 2015