Building Synchronization Equivalence between Droop-based Grid-Forming and PLL-based Grid-Following Inverters

Gird-forming inverter (GFM) and Grid-following inverter (GFL) have been developed into totally different concepts, but a strong similarity exists in the synchronization mechanism. In this digest, their inherent equivalence of synchronization control is revealed by analytical derivation. As a result, this mapping relationship bridges the gap between the two communities working on GFM and GFL, and this equivalence provides more physics-based insights into the corresponding parameter design. The case test results are carried out to verify the equivalent analysis.