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提出了一种基于虚拟同步发电机算法的模式自适应微网调频控制方法,可在不改变控制结构和控制参数的条件下实现微网逆变器的多模式运行。分析了功率等级、开关频率、运行模式对系统参数的要求,运用小信号模型,以系统的稳态特性、动态特性、解耦性能和稳定性为约束条件对所提出的控制器参数进行了优化设计。仿真结果验证了提出的方法正确性,说明通过优化配置控制参数,所提出的模式自适应调频控制方法可同时满足并网和并联的控制要求,并实现模式间的无缝切换。
A mode-based adaptive microgrid frequency modulation control method based on virtual synchronous generator algorithm is proposed, which can realize the multi-mode operation of the microgrid inverter without changing the control structure and control parameters. The parameters of power system, switching frequency and operating mode are analyzed, and the parameters of the proposed system are optimized by using the small signal model and the steady-state, dynamic, decoupling and stability of the system as constraints design. The simulation results validate the correctness of the proposed method. It shows that by optimizing the configuration of control parameters, the proposed adaptive frequency control method can meet the control requirements of grid connection and parallel connection and achieve seamless switching between modes.