孤岛直流微电网的光储协调控制策略

Coordinated control strategy with photovoltaic storage for isolated DC microgrid

针对孤岛模式下的直流微电网,光伏电池由于容易受到外界因素干扰而出现微电网内功率不平衡现象,为此提出采用非对称模糊控制策略跟踪最大功率点充分利用光能。对于传统模式下的微电网协调控制策略容易出现电能质量波动范围大,从而导致微电网内部协调控制模式切换频率高的问题,提出了把直流微电网母线电压进行分段式协调控制的方式。通过Matlab/Simulink实验仿真,验证了方案的有效性和可行性。

For the DC microgrid in the island mode,the photovoltaic cells are prone to be disturbed by the external factors,which leads to power imbalance in the microgrid.Therefore,an asymmetric fuzzy control strategy is proposed to track the maximum power point and make full use of the light energy.For the problem that the power quality fluctuates widely in the traditional coordinated control strategy of the microgrid,which leads to frequent frequency switching of the internal coordinated control mode of the microgrid,this paper proposes a method of the sectional coordinated control of the DC microgrid bus voltage.The effectiveness and feasibility of the proposed scheme are verified by the Matlab/Simulink experimental simulation.