Virtual Synchronous Generator-Based Frequency Control Strategy for Grid-Connected PV Systems

One of the sources of renewable energy, photovoltaic (PV) power generation has a wide range of potential applications, and its integration into the electrical grid is growing. PV systems cannot actively regulate frequency in real time because they lack the high inertia and output impedance of synchronous generators. Giving the PV system the fundamental capacity to control frequency, based on the synchronous generators' self-droop properties, researchers created a droop control method. However, this approach still lacks control process inertia and damping linkages. This problem can be overcome, according to the study, by regulating the frequency of PV systems using a virtual synchronous generator (VSG) management strategy. The dynamic qualities of the PV system are improved by frequency management using the swing equation, which is based on droop control. The outcomes of the simulation demonstrate that the suggested algorithm is capable of successfully increasing the dynamic characteristics of frequency change and reaching the same level of main frequency regulation as the droop control.