In order to realize no energy difference when the large-scale distributed energy storage units of grid connected photo-voltaic power stations discharge and charge,and to achieve energy balance,an intelligent energy balance control method for large-scale distributed energy storage units of grid connected photovoltaic power stations is proposed.This paper analyzes the structure of large-scale distributed energy storage unit of grid connected photovoltaic power station,and extract the dynamic change characteristics of energy storage unit based on ampere hour integration method.An energy balance factor is introduced to improve the droop control method,and an adaptive balance control strategy under the influence of line impedance is designed to control the output current without abnormality and realize energy intelligent balanced control.The experimental results show when the proposed method is used,the energy difference of the three energy storage units of grid connected photovoltaic power station is 0％when discharging and charging,and the difference of output current is 0,which can achieve intelligent energy balance of distributed energy storage units.
关键词
并网型电站/光伏发电站/分布式储能/能量均衡
Key words
grid connected power station/photovoltaic power station/distributed energy storage/energy balance
维普
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