Unified MPPT Control Strategy for Z-Source Inverter
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2015, Vol 3, Issue 8
Abstract
This Paper proposes the PV array connected Z-source inverter is widely used because it boost up output voltage and reduces the harmonics and improves efficiency. Here single stage Photovoltaic power conversion system uses less number of switching devices and reduces the system cost. The Perturb and observation MPPT control algorithm provides shoot-through period which inserted into switching devices to produce maximum power to the Z-network. At this instant, the voltage across Zsource capacitor is equal to the output voltage of PV array at the MPP. The control of Z-source capacitor voltage beyond the MPP voltage of a PV array is not possible in Traditional Maximum Power Point Tracker algorithm. In this work Unified MPPT control algorithm is used to simultaneously achieve MPPT as well as Z-source capacitor voltage. The Operation and Performance of the Proposed Systems have been simulated using MATLAB/Simulink.
Authors and Affiliations
V. Aswini, B. M. Manjunath, J. Nagarjuna Reddy
Keywords
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