فهرست نشریات علمی دسترسی آزاد ایران

In recent years, advanced power converters have become increasingly prominent in power system applications. Among them, the virtual synchronous generator (VSG) stands out due to its ability to replicate the desired dynamic behavior within the grid. However, while VSGs perform well under balanced operating conditions, they struggle to manage unbalanced components effectively. To overcome this limitation, this study introduces a control approach for islanded microgrids based on a decoupled double self-tuning filter (DDSTF). This method enhances the VSG's operation under unbalanced voltage scenarios by separating positive and negative sequence components in the d-q reference frame. As a result, oscillatory distortions are significantly minimized. Moreover, the technique facilitates the isolation of DC components from fluctuating signals, leading to improved controller efficiency along the d-q axes. The proposed solution offers several advantages, such as higher precision, improved control response, effective component separation, and low computational complexity. Simulation results confirm the practicality and performance improvements of the proposed approach.