Modeling and Small Signal Stability Analysis of Virtual Synchronous Generator Control with Field Winding Transient

The synchronous generator model forms the foundation for virtual synchronous generator (VSG) control. However, the impact of different-order model structures as VSG controls on system stability is still unclear. This paper investigates the influence of field winding transient in VSG control on the low-frequency stability of the system. The study reveals that, compared to the commonly used second-order VSG control, the VSG control with field winding transient introduces a negative virtual resistor, thereby reducing system damping, which deteriorates system stability. Experimental tests are presented to validate the theoretical analysis.