Today a power electronics inverter is used efficiently to control the flow of the active and reactive power between a dc power source and the utility grid acting as a power STATCOM which also finds applications in the interfacing of RES.
Fig. 6.135 presents the block diagram of a three-phase VSI, connected to a utility grid (PCC), where

is the fundamental component of the inverter output phase voltage that operates at a voltage amplitude of

and with a phase displacement δ ...