Effects of line parameters on performance of voltage source converters in distributed generation systems

The paper discusses the operational domain of three phase voltage source converters (VSC) connected to an ac grid. The effects of the parameters (X/R ratio) of the conductors between the VSC and grid on the active and reactive power transfer are analyzed. The impacts on the control parameters, namely, the power angle and output voltage of VSC have been described. The study has revealed the active and reactive power operational domain in relation to the circuit parameters. The simulation studies are conducted; the presented results have confirmed the analysis results. The results could be used to determine the power controllability of a VSC, therefore, the capacity of controlling reactive power/power factor while transfer the active power.