The design of DC/DC boost converter used for maximum power point tracking in grid connected PV systems is complex due to the non-linearity of  the PV source. This paper presents a unique design approach of the boost converter for grid connected photovoltaic inverters. The design considerations and requirements to derive the converter equations, appropriate for determining the main variables and elements of its circuit, beside the function requirements of the inverter and the continuous current mode have been fully respected.  The discussed design parameters are the DC inverter input voltage, maximum/minimum duty cycle, the ripple values in the boost input/output voltage and the inductor current ripple. This approach requires the value of inverter threshold power and the maximum allowed ripple values of inductor current, input voltage and output voltage. The simulation results show that the presented design approach enables selecting the appropriate converter elements which facilitate its function. Moreover, the impacts of important parameters as solar radiation and PV cell temperature are considered. Simulation of the converter has been carried out by Matlab-Simulink software under realistic conditions to verify the effectiveness of the proposed design approach.

Title

International Journal on Energy Conversion (IRECON)

Publisher

An-Najah National University

Publisher Country

Italy

Indexing

Scopus

Impact Factor

None

Publication Type

Both (Printed and Online)

Volume

7

Year

2019

Pages

12