电流源视角下组网和跟网设备互联系统的同步稳定性定义与分析

With the integration of large-scale new energy and power electronics, the power system has gradually formed a form of interconnection between networking equipment and network following equipment. The networking equipment mainly includes virtual synchronous machines and synchronous machines, while the network following equipment mainly consists of phase-locked loop converters. Synchronous stability is crucial as the foundation for the operation of large power grids, but due to the significant differences in synchronization mechanisms between networking devices and network following devices, it is extremely difficult to analyze the synchronous stability of interconnected systems. Therefore, this article utilizes the concept of dual excitation winding synchronous machines in physical understanding to construct an equivalent structure that can unify network equipment and network following equipment. In mathematics, a universal modeling approach is proposed to describe the synchronization characteristics of equipment, and a synchronization stability analysis model for interconnected systems based on current sources is established. Furthermore, the mathematical definition of synchronization stability in interconnected systems and several sufficient conditions for system synchronization stability are given. Finally, a simulation example was built in MATLAB/Simulink to verify the rationality of the model.