High-frequency Oscillation Suppression Strategy Based on Arm Current Feedforward Virtual Damping in SVG for Photovoltaic Plants

With the large-scale grid connection of renewable energy, there exists the oscillation problem, causing equipment damage and large power loss. Recently, some oscillation suppression strategies do not consider the influence of SVG on stability. However, a high-frequency oscillation problem caused by SVG is found in an actual PV plant. Therefore, this paper proposes a high-frequency oscillation suppression strategy based on arm current feedforward virtual damping in SVG for PV plants. The proposed strategy can eliminate the oscillation problem without affecting the original dynamic performance. Finally, the simulation results are presented to demonstrate the effectiveness of the proposed oscillation suppression strategy.