独立光伏发电混合储能系统功率转换控制研究  

Research on power control for hybrid energy storage of photovoltaic generation system

作　　者：闫晓金 Yan Xiaojin(Department of Postgraduates,North China Institute of Aeropace Engineering,Langfang 065000,China)

机构地区：[1]北华航天工业学院研究生教学部,河北廊坊065000

出　　处：《可再生能源》2020年第10期1368-1374,共7页Renewable Energy Resources

基　　金：河北省教育厅青年基金(QN2019122);北华航天工业学院校重点项目(ZD202003);廊坊市科技支撑计划项目(2017011071)。

摘　　要：超级电容与蓄电池构成的混合储能系统,可以实现高效收集独立光伏发电系统能量,还能避免蓄电池充放电的电流大幅波动。文章根据光伏电池、蓄电池和超级电容混合储能单元、负载三者之间的功率转换关系,分析了独立光伏发电混合储能系统的基本工作模态,提出了一种基于SOC模糊控制的混合储能系统功率分配策略。控制超级电容快速平抑系统的功率波动,可使蓄电池基本处于恒流充放电状态,优化混合储能系统的功率特性。通过搭建Simulink仿真平台验证的结果表明,功率分配控制策略能够有效控制独立光伏发电混合储能系统的能量转换,抑制光伏电池和负载功率变化对储能系统的影响,保持直流母线电压稳定,并优化了蓄电池的工作状态。The hybrid energy storage system composed of super capacitor and battery hybrid energy storage can realize efficient collection of energy from independent photovoltaic power generation system.At the same time,it can also avoid large fluctuations in the current of the battery charge and discharge.Based on the power conversion relationship among photovoltaic cells,batteries and superceapacitor hybrid energy storage units,and loads,the article analyzes the basic operating modes of independent photovoltaic power generation hybrid energy storage systems.This paper proposes a hybrid energy storage system power allocation strategy based on SoC fuzzy control.In order to optimize the power characteristics of the hybrid energy storage system,we use the control super capacitor to quickly smooth the power fluctuation of the system,and realize that the battery is basically in a constant current charging and discharging state.Simulink simulation results show that the power distribution control strategy can effectively control the energy conversion of the independent photovoltaic power generation hybrid energy storage system.At the same time,it can suppress the impact of photovoltaic cells and load power changes on the energy storage system,maintain the stability of the DC bus voltage,and optimize the working state of the battery.

关 键 词：混合储能 光伏发电 模糊控制 荷电状态 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程]