基于混合储能的直流微电网协同能量管理策略

Cooperative Energy Management Strategy of DC Micro-grid Based on Hybrid Energy Storage

根据直流微电网的结构以及运行特点,分析了直流微电网中分布式发电单元和混合储能单元的控制策略。针对直流微电网中由于分布式发电单元输出功率的不稳定以及负载突变造成的直流母线电压波动问题,提出了一种基于直流微电源模块和混合储能模块的协同能量管理策略。该控制策略以直流母线电压为信号对混合储能模块的充放电模式进行控制。同时也搭建了含光伏微源单元和混合储能单元的仿真模型,通过MATLAB/Simulik仿真软件对混合储能的能流切换模式进行仿真,结果表明该策略在负荷波动或者光伏单元输出功率不稳定情况下直流母线电压的相对稳定性,验证了该策略的正确性和可行性。

According to the structure and operating characteristics of DC micro-grid control strategies are analyzed in a DC micro-grid distributed generation units and hybrid energy storage unit. For DC microgrid distributed generation units due to the unstable output power and the DC bus voltage load fluctuation caused by mutations, a new micro-based DC power supply module and hybrid energy storage module collaborative energy management strategies. The control policy to the DC bus voltage signal to charge and discharge mode hybrid energy storage module control. At the same time, it also build a simulation model with photovoltaic cells and mixed-source storage unit, Simulik simulation software for the storage of mixed stream switching mode can be simulated by MATLAB, the results show that the strategy fluctuations in load or photovoltaic cell output power instability the relative stability of the case DC bus voltage to verify the correctness and feasibility of the strategy.