光储微电网运行模式无缝切换方法研究

Optical storage microgrid modeling and seamless switch of operation modes

微电网因其清洁和组网控制方式灵活等优势而被广泛应用。对光、储个体微电源分别进行建模,其中,在进行光伏组件建模时提出一种基于功率占空比二次微分的改进最大功率点跟踪(MPPT)算法;提出基于模式控制器的模式切换策略,该策略通过实时检测公共连接点(PCC)处的电压和频率,判断微电网的运行状态,并根据运行状态控制各逆变器的工作模式。MATLAB/Simulink仿真结果表明:该控制方法能够实现2种运行模式的无缝切换。

Micro-grid is clean and green network with flexible controlling,it is widely used in pow-er system.Models of PV and storage micro-sources were established in this paper.An improved MPPT algorithm was proposed based on the duty cycle of secondary power differential in the PV model.And an operating mode switching strategy was proposed for model controller.By detecting the voltage and frequency at point of common coupling （PCC）,the strategy could effectively j udge the operating status of micro-grid and control the converters operation modes.The MAT-LAB/Simulink based simulation results showed that the proposed controlling strategy can achieve seamless switch between two operating modes.