VSG Parameter Coordinated Control Strategy Toward Optimization of Energy Storage Capacity Configuration

Although a parameter-adaptive control strategy based on the traditional virtual synchronous generator(VSG) can alleviate issues related to active power frequency oscillations during transient processes, it simultaneously amplifies the demand for configuring energy storage capacity. In response to this issue, the proposed approach is initiated by first analyzing the dynamic responses of the VSG system under overdamped, critically damped, and underdamped conditions. A correlation between these damping conditions and the required energy storage capacity is established, with the most suitable damping states corresponding to different dynamic phases of the VSG system ultimately being summarized. Building upon this analysis, a VSG parameter coordination control strategy that enables controllable and variable system damping ratios is introduced. The primary objective of this strategy is to enhance the dynamic response of the VSG system while optimizing the configuration of the system's energy storage capacity. Lastly, a comparative analysis between the proposed VSG parameter coordination control strategy and the traditional VSG parameter control strategy is conducted. The correctness and effectiveness of the proposed control strategy are validated through software and semi-realistic simulation results.