【摘要】 为解决高比例新能源并网的间歇性与不稳定性问题，同时提高其利用效率，针对基于全钒液流电池(VRFB)的构网型储能系统展开研究。采用多物理场耦合的VRFB混合模型，全面模拟其动态运行特性；设计基于直流母线电压外环的柔性充放电控制策略，并集成虚拟同步发电机(VSG)控制技术，实现对VRFB充放电的精确控制；最后，通过MATLAB/Simulink建模仿真验证策略的有效性。结果表明，所提策略长时放电能稳定输出端电压，在光伏/VRFB并网运行、调频调压及维持直流母线电压稳定等方面性能优异，验证了VRFB在构网型储能领域的应用潜力。更多还原

【Abstract】 To address the intermittent and unstable issues of high-proportion new energy grid connection and enhance its utilization efficiency, the grid-forming energy storage system based on vanadium redox flow batteries(VRFB) is focused on.The research employs a multi-physics field-coupled VRFB hybrid model to simulate its dynamic operation characteristics comprehensively.Based on this, a flexible charge and discharge control strategy based on the outer loop of the DC bus voltage is designed, and the virtual synchronous generator(VSG) control technology is integrated to achieve precise control of VRFB’s charge and discharge.The effectiveness of the strategy is verified through modeling and simulation in MATLAB/Simulink.The results indicate that this strategy can stabilize the output terminal voltage during long-term discharge and performs outstandingly in photovoltaic/VRFB grid-connected operation, frequency and voltage regulation, and maintaining the stability of the DC bus voltage, which can validate the application potential of VRFB in the field of grid-forming energy storage.更多还原