Abstract
In recent years, virtual synchronous generator (VSG) technology has been more and more used in grid-connected inverters of PV power generation systems. Photovoltaic inverter based on VSG can improve the voltage support capacity of the power grid, but it increases the difficulty of the power grid elaborate modeling and simulation. This paper researched the modeling and parameter identification of the PV inverter based on VSG. In this paper, the PV inverter simulation model based on VSG technology was set up in PSCAD and the effective voltage support capability of VSG technology for the power grid was verified. The mathematical model of the inverter based on VSG was established in MATLAB and important parameters were identified based on the improved differential evolution algorithm. Finally, the performance of the modeling method and parameter identification method used in this paper were tested by considering various perturbations.
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