A three-phase grid-connected photo-voltaic converter is investigated in this paper to enhance its operational capabilities and stability margins. These converters are generally connected to the grid with an inductive impedance. In this paper the possibility of using a resistive impedance to enhance the stability of the overall system has been investigated. To reduce the losses in the system, rather than using a real resistance, a virtual resistance is emulated inside the control architecture to ensure resistive power transfer between two sources. The stability with an inductive and resistive grids are presented in this paper based on results of already reported frequency response. The overall system is modeled via MATLAB/Simulink and several important case study results are presented in this digest. More case studies and/or hardware in the loop results for various other case studies will be presented in the final version of the paper.
