Optimized Design of the AC-Side Inductance for Grid-Forming Inverter

With the large-scale integration of renewable energy in modern power systems, grid-forming (GFM) inverters will play an increasingly important role. Currently, the design method for the AC-side inductance of GFM inverters still follows that of the AC-side inductance of grid-following (GFL) inverters, which may lead to the grid-forming inverters not achieving the best performance. To address this issue, an optimized design method for the AC-side inductance of inertia synchronous control- (ISynC-) based GFM inverters is proposed by considering the constraint relationship between the DC-link voltage and grid frequency fluctuation in this paper. Finally, simulation results demonstrate that the DC voltage can correctly sense the fluctuations in grid frequency with adopting the optimal design, which is not susceptible to disturbances caused by variations in AC voltage and active power.