Modified incremental conductance algorithm for Z-source inverter based photovoltaic power conditioning systems

Abstract EN

Recently photovoltaic (PV) energy harvesting and its transformation into electrical energy attract substantial pursuits.

In this PV power system, it is required to obtain the maximum available power by integrating the maximum power point tracking.

Lately, the Z-source inverters are adapted as power conditioning devices, which act as a single stage power conditioner for converting PV array DC voltage into AC output voltage, boost the voltage magnitude and draw out the maximum power.

The photovoltaic array output voltage is controlled and the maximum power point tracking is attained by controlling the shoot-through duty cycle.

The well known incremental conductance maximum power point tracking algorithm is modified to prevent the bewilderedness during rapidly changing irradiation condition.

This algorithm is used along with the shoot-through incorporated pulse width modulation techniques to control the Z-source inverter.

Computer simulation and experimental results are rendered to establish the performance of the proposed system.