A Comparative Study of Droop and VSG Controlled Grid Forming Inverters Integrated with D-STATCOM

With the rise of Distributed Energy Resources (DER), the grid-forming inverter (GFMI) has become a key focus area in modern power systems. This paper presents a comparative performance analysis of two GFMIs controlled_by similar and different controls (Droop and Virtual Synchronous Generator (VSG) control) integrated with D-STATCOM based on settling time, stability with the effect of PI gains of D-STATCOM's controller. This study finds that Droop controlled GFMIs settle faster than Droop-VSG and VSG controlled GFMIs. However, Droop-VSG provides the least peak overshoots to D-STATCOM. The increased PI gain values of a controller of D-STATCOM provide faster stability of the system. The analysis is conducted using MATLAB/Simulink.