考虑氢能应用的光伏直流微电网中储能容量配置寻优方法研究

Research on Optimization Method for Energy Storage Capacity Configuration in Photovoltaic DC Micro Grid Considering Hydrogen Energy Application

针对光伏出力的间歇性与不稳定性,使得单纯依赖蓄电池进行能量平抑和调节,难以满足微电网持续稳定运行的需求,提出考虑氢能应用的光伏直流微电网中储能容量配置寻优方法。考虑氢能在光伏直流微电网中的应用,对光伏电池、蓄电池以及电解槽—储氢罐—燃料电池建模分析。根据建模分析结果,设计功率平抑控制策略与混合储能充放电管理策略。将最大化年净利润与光伏自消纳率作为优化目标,建立储能容量配置优化模型,获得储能容量最优配置结果。实验结果表明,应用所提方法后,光伏直流微电网的功率偏移率实现了显著的降低,调峰能力得到了有效优化,并且调度后微电网的自平衡率大幅提升,表明该方法具有良好的容量配置效果。

In view of the situation that the sustaining and stable operation of the micro grid only by batteries for energy leveling and adjustment can not be met due to the intermittency and instability of PV output,the optimization method of energy storage capacity allocation in photovoltaic DC micro grid considering Hydrogen energy application is proposed.Considering the application of Hydrogen energy in photovoltaic DC micro grid,the photovoltaic cell,battery,electrolyzer-Hydrogen storage tank-fuel cell are modeled and analyzed.The power leveling control strategy and hybrid energy storage charge and discharge management strategy are designed in accordance with the the modeling analysis results.The maximizing annual net profit and PV self-absorption rate are taken as the optimization objectives,an optimization model of energy storage capacity configuration is set up to obtain the optimal configuration result of energy storage capacity.The experimental results show that with application of the proposed method,the power deviation rate of photovoltaic DC micro grid is significantly reduced,the peak load balancing capacity is effectively optimized,and the self-balance rate of the micro grid is greatly improved,indicating that the method has a good capacity allocation effect.