基于混合储能系统的微电网功率波动抑制策略

A Microgrid Power Fluctuation Suppression Strategy Based on Hybrid Energy Storage System

摘要:

为了提高微电网的动态响应能力和稳定性，提出了一种采用分层控制的多频率功率波动抑制策略。首先，利用超级电容器响应速度快、功率密度高的优势，抑制高频功率波动；然后，利用锂离子电池动态响应能力强的特点，调节中频功率波动；最后，利用铅酸蓄电池大容量与稳定的特性，负责低频功率波动下的长时间平衡调节。将3种储能元件的特性与多频率功率波动相匹配，以提高微电网对多频率功率的抑制效果。通过在Simulink平台上对所提模型进行仿真，验证了该系统在多频率功率波动抑制方面的优越性能。仿真结果表明，所提控制策略能够实现不同储能元件的协同优化，使电力系统在复杂工况下保持高效稳定运行。

Abstract:

In order to improve the dynamic response capability and stability of microgrids, a multi-frequency power fluctuation suppression strategy with hierarchical control is proposed. Firstly, supercapacitors, due to their advantages such as fast response and high power density, are used to suppress high-frequency power fluctuations. And then, the strong dynamic response capability of lithium-ion batteries is utilized to adjust medium-frequency power fluctuations. Finally, because of its large capacity and stable characteristics, lead-acid batteries are used to regulate long-term balance under low-frequency power fluctuations. The characteristics of three energy storage components are matched with multi-frequency power fluctuations to enhance the suppression effect of microgrid on multi-frequency power. By simulating the proposed model on Simulink platform, the superior performance of the system in suppressing multi-frequency power fluctuations is verified. Simulation results show that the proposed control strategy can achieve a coordinated optimization of different energy storage components, which enables the power system to maintain efficient and stable operation under complex conditions