Abstract

This work presents a single stage multi-objective solar energy conversion system (SECS), which integrates a photovoltaic (PV) array to a three-phase three wire distribution system. To harvest maximum power from the PV array, the reference DC bus voltage is calculated using an MPPT algorithm based on an incremental conductance (INC) technique. A voltage source converter (VSC), which is controlled by a modified distributed normalized least mean square (dNLMS) based control technique integrates the PV array to the grid. The SECS has the capabilities of a distribution static compensator (DSTATCOM) such as power factor correction, grid currents balancing, and harmonics currents reduction to meet the IEEE 519 standard. Moreover, it can continue operating as a DSTATCOM, in the absence of sufficient solar irradiance. The control technique is tested under various dynamic conditions using test results on a prototype developed in the laboratory.

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