Synchronization Mechanism Test and Evaluation Method for New Energy Converters

The essential difference between grid-following (GFL) and grid-forming (GFM) control lies in the different synchronization mechanisms. In order to obtain a new energy unit synchronization mechanism judgment method, this paper firstly analyzes the synchronization methods of the two control methods in principle, then establishes the time domain simulation model of GFL and GFM control and verifies their synchronization response characteristics through phase jump experiments, and analyzes the influence of the key control parameters of GFL and GFM on the synchronization response characteristics. Finally, a judgment index is proposed to distinguish between GFL and GFM units, and based on the hardware-in-the-loop simulation of the black box unit controller to determine the synchronization mechanism, the results show that the index can realize the effective distinction between GFL and GFM units, and has a strong compatibility with the unit control strategy.