Combined DC-Link Fed Parallel-VSI-Based DSTATCOM for Power Quality Improvement of a Solar DG Integrated System

In present day power systems, Power Quality (PQ) issues are causing great concern owing to the increased use of electronic controlled drives and fluctuating other non-linear loads. This problem is further aggravated by a steady increase in integration renewable energy-based Distribution Generation (DG), employing converters distribution systems. Custom devices with suitable control strategies provide an effective solution these quality issues. this work, typical three-phase system supplying load DG considered. A shunt connected DSTATCOM at PCC employed mitigate concerns. Initially, parallel-VSI based configuration, individual DC-Link working basically on principle current sharing, has been proposed. The analysis carried out for variable conditions PQ enhancement making more theory viz. Instantaneous Real-Reactive (IRP) generation switching patterns VSIs parallel DSTATCOM. Further, improvement over above configuration combined/common DC-Link-fed advantages minimized sensing elements, reliable operation low-cost compensation. similar improvement, same IRP some modifications (known as MIRP theory). effectiveness established from simulation results. all cases, analyses using MATLAB/Simulink platform results presented detail. Thus, proposed VSIs-based configurations solutions under varying conventional