A PV-DSTATCOM With Adaptive DC-Link Voltage for Grid Integration and PQ Enhancement

A photovoltaic based distribution static compensator (PV-DSTATCOM) is one of the leading approaches to deal with the energy demand shortage and power quality issues in the modern power system. This article achieves the improved performance of PV-DSTATCOM to establish the grid integration and power quality enhancement. In the proposed system, during the PV-DSTATCOM state, photovoltaic array power is used to maintain the dc-link voltage by extracting the maximum power based on the perturb and observe algorithm and supplying the excess power into the grid. During the DSTATCOM state, a reference dc-link voltage control scheme is proposed based on the connected load on the point of common coupling, which thus regulates the dc-link voltage and enhances the PV-DSTATCOM performance. The control signals for the voltage-source inverter are generated based on the modified synchronous reference frame control scheme. The effectuality of the proposed system is validated by the MATLAB simulation results. A hardware prototype is developed to verify the usefulness of the proposed system compared to the control technique in the literature. Finally, the results presented in this article convey how the improved performance of PV-DSTATCOM has been accomplished while guaranteeing power quality improvement and grid integration.