摘要
针对光伏储能系统中多种工作模式间自由切换时的供电可靠性问题,以Lab VIEW2015为软件开发平台,开发设计了独立的光储能量管理系统。同时改进光储能量管理系统MPPT算法,采用变步长扰动算法减小系统启动时的功率波动,保证外部条件变化时的动态跟踪性能,减小MPPT点附近的功率波动,提高光伏系统能量利用率。根据母线以及储能电池的端电压,确定了能量管理系统的5种工作模式,确保系统的快速响应以及高效运行。最后,在已搭建的实验平台中验证了所提出的能量管理方法的有效性。
During free switching between various working modes,the power supply of the photovoltaic energy storage system is not reliable. Based on Lab VIEW 2015,this work developed an independent management system for storing light energy. To improve the MPPT algorithm in the photovoltaic energy storage system,the variable step size perturbation algorithm is used to reduce the power fluctuation during the initiation of the system. At the same time,the improved MPPT algorithm guarantees the dynamic tracking performance when the external conditions change,reduces the power fluctuation near the MPPT point,and improves the energy consuming efficiency of PV systems. According to the terminal voltage of the generatrix and the storage battery,five working modes of energy management system has been developed to ensure the fast response and efficient operation of the system. Finally,the effectiveness of the proposed energy management method is verified by the experimental platform.
基金
国家自然科学基金资助项目(51777146)
