面向储能容量配置优化的VSG参数协调控制策略

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

  • 摘要: 以传统虚拟同步发电机(Virtual synchronous generator, VSG)为基础的参数自适应控制策略虽可改善暂态过程中有功频率振荡问题,但却增大了对储能容量配置的需求。针对这一问题,首先通过分析VSG系统处于过阻尼、临界阻尼与欠阻尼状态下的动态响应,联立其与储能容量的关系,总结VSG系统在不同动态阶段所对应的最适宜阻尼状态。在此基础上,提出一种基于系统阻尼比可控可变的VSG参数协调控制策略,旨在改善VSG系统动态响应的同时优化系统储能容量配置。最后,将所提VSG参数协调控制策略与传统VSG参数控制策略进行对比分析,软件与半实物仿真结果验证了所提控制策略的正确性与有效性。

     

    Abstract: 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.

     

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