Parameters Analysis and Operational Area Calculations of VSG Applied to Distribution Networks

Virtual synchronous generator (VSG) technology is an effective way to realize coordinated energy supply of active distribution networks and comprehensive energy at present. This paper starts from the two perspectives of grid-connected operational modes and island operational modes. Based on the mathematical model of VSG, referring to existing grid standards, comprehensively considering its active and reactive-power loop stability and dynamic performance, the influencing factors of the related control parameters
$K,\ D_{\mathrm{q}},\ J,\ D_{\mathrm{p}}$
are analyzed. And selection range for
$K,\ D_{\mathrm{q}},\ J,\ D_{\mathrm{p}}$
is proposed, which ensures stability and robustness in grid-connected and island operational modes. In this paper, this method can be used as a reference for control strategy research and practical engineering applications of VSG. Finally, effects of parameter selection on stability and dynamic performance of active and reactive-power loops are analyzed by using the zero-pole map and Bode diagram, and feasibility of the scheme is verified by PSCAD/EMTDC.