Numerical Simulation and Design for Mitigating Power Quality Issue based on PV Supported DVR and D-STATCOM

Abstract

Integration of the grid with non-conventional energy systems has always been a difficult scenario, but with conventional energy depleting at an alarming rate and power demand rising by the day, it has become imperative to concentrate on renewable energy systems and their integration with the conventional system. Little attention has been paid to the integration of Renewable Energy Sources (RES) into the existing Power System to meet the growing demand for electricity and improve the related power quality issues. Power quality issues and their significant influence on sensitive loads are well-known. By integrating a solar PV integrated Static Synchronous Compensator (PV-STATCOM) and PV-battery based Dynamic Voltage Restorer (DVR) into the grid, the proposed study aims to compare the performance of both the devices to improve power quality issue. The maximum power output from a PV array is retrieved using a P&O MPPT controller, regardless of temperature or irradiation conditions. The PV- STATCOM's and DVR’s DC-link is connected to solar PV via a DC-DC boost converter. MATLAB SIMULINK has been used to model and simulate PV integrated DVR and STATCOM. The PI controller and discrete PWM provides the control of DVR and PV-STATCOM. According to the simulation results DVR is more efficient than D-STATCOM for improving power quality in PV integrated grid.