A control strategy for a solar grid-connected inverter

In this paper, the control of a grid-connected inverter is investigated. There are two key control issues that need to be examined. The first is the control of the AC side of the converter to ensure that sinusoidal output waveforms are produced and that the DC bus capacitor voltage that the six-switch bridge see is fixed. It will be assumed in this paper that the output of the inverter is being fed to the grid. The second key issue that needs to be examined is the current that is fed from the PV panels to the inverter. The ripple on this current must be minimized as much as possible so that the inverter can be implemented with maximum power point tracking techniques (MPPT) that will enable it to extract the maximum power that is available from the PV panels at any given time.