【摘要】 随着电力系统中可再生能源渗透率的不断提升，系统惯量水平逐渐下降，频率稳定性面临严峻挑战。为应对该问题，光伏发电通过引入储能系统，可提供惯量和一次调频支撑。提出一种基于变流器和储能容量限制的自适应虚拟同步发电机（VSG）控制方法，以动态调整光储系统的转动惯量和阻尼系数。首先，通过建立控制方程，明确频率偏差、下垂系数与变流器输出之间的关系，推导出满足容量限制的一次调频参数边界，并在此边界下分析转动惯量和阻尼系数对系统稳定性的影响。然后，设计出一种考虑了荷电状态的自适应VSG控制策略。最后，基于MATLAB/Simulink平台，验证该策略与传统固定参数VSG控制策略的性能差异。仿真结果表明，该策略在保证容量限制的前提下，显著提升了光储系统的频率支撑能力与运行安全性，具有优越性与实用价值。更多还原

【Abstract】 With the continuous increase in the penetration rate of renewable energy in power systems, the system inertia level gradually declines, posing severe challenges to frequency stability. To address this issue, photovoltaic power generation can provide inertia and primary frequency regulation support by integrating energy storage systems. An adaptive Virtual Synchronous Generator(VSG) control method considering capacity limitations of converters and energy storage is proposed to dynamically adjust the rotational inertia and damping coefficient of the photovoltaic-storage system. Firstly, by establishing control equations, the relationship between frequency deviation, droop coefficient, and converter output is clarified, and the primary frequency regulation parameter boundaries satisfying capacity limitations are derived. The impact of rotational inertia and damping coefficient on system stability is then analyzed within these boundaries. Subsequently, an adaptive VSG control strategy considering the state of charge is designed. Finally, the performance differences between this strategy and traditional fixed-parameter VSG control strategies are verified using the MATLAB/Simulink platform. Simulation results demonstrate that, under the premise of ensuring capacity limitations, this strategy significantly enhances the frequency support capability and operational safety of the photovoltaic-storage system, showcasing its superiority and practical value.更多还原