基于混合储能的光伏波动功率平抑方法研究  

Research on the method for balancing fluctuant PV power based on hybrid energy storage system

作　　者：张冰冰[1] 邱晓燕[1] 刘念[1] 孙斌[2] 刘明[2] 朱椤方[2] 崔伟[1] 魏杰[1] 郑乔[1] 庄哲[1] 

机构地区：[1]四川大学电气信息学院,四川成都610065 [2]贵州电网公司电力调度控制中心,贵州贵阳550002

出　　处：《电力系统保护与控制》2013年第19期103-109,共7页Power System Protection and Control

基　　金：贵州电网公司重大科研项目(12H0594);四川省科技支撑项目(2011GZ0036)资助

摘　　要：针对光伏发电系统中发电功率波动问题,构建了一种基于混合储能的光伏并网发电系统模型,以平抑并网功率的波动。该模型引入了由超级电容器和蓄电池组成的混合储能系统,可以有效应对在各种天气条件下所引起的光伏输出功率波动问题,从而对并网功率进行削峰填谷。同时,对现有的MPPT法进行相应改进,提出了单向变步长追踪法,能够更加稳定且迅速地调整光伏系统的最大输出功率,提高发电效率。最后,在Matlab/Simulink上进行仿真,结果表明该混合储能控制系统能够有效提高光伏并网功率输送的稳定性能。Aiming at the question of balancing the fluctuating photovoltaic grid-connected generation system, a hybrid energy storage-based grid-cormected PV power system model is proposed to overcome the fluctuation of grid-injected power caused by the change of illumination intensity and temperature. An ultracapacitor-battery based energy storage control system is employed to smooth the fluctuation of grid-injected power caused by the change of various weather conditions. A new method to track the maximum power point is proposed to modulate the maximum output power of PV system more stably and instantly, and it can also improve the power generation efficiency. Finally, this model is tested by using Matlab/Simulink. The result proves that the hybrid energy storage-based control system can efficiently improve the stability of PV grid-injected power.

关 键 词：光伏发电系统 超级电容器 蓄电池 混合储能 改进型MPPT 功率平抑 

分 类 号：TM615[电气工程—电力系统及自动化]