Research On The Energy Storage System Of The New Energy Power Station

With the development of new energy and the electric vehicle industry,electric vehicles have become the focus of the society.In the future,there will be a large number of automobile power batteries to meet the conditions of transportation.Electric cars for high performance requirements of the battery,when the battery capacity attenuation to 80% of the rated capacity,think power battery is not fit to use on electric cars,but retired from the car battery still has 80% of the residual capacity,still have to continue to use value,on the screening and reassemble the batteries,can be applied to the battery performance requirements are relatively low.As a battery energy storage system can realize energy storage device and bidirectional power flow,improve power grid load frequency control equipment system and the reactive power supporting ability,etc.,the return of electric cars and batteries have retired in the energy storage system may continue to use.In this Thesis,the research object of the lithium ion battery in the decommissioned battery of the recharging station of xujiadao in Qingdao is introduced,and the development research status of the battery storage energy is introduced firstly.Secondly through the long cycle of cycling test,on the battery performance testing,research phase using monomer battery and battery module in recession trajectory under different working conditions,analysis of different cycles capacity decline reasons,internal resistance performance,voltage change,power characteristic changes,external characteristics of pilot use lithium ion battery to conduct a comprehensive research and analysis;Then introduce the battery modeling method and the pilot use lithium ion battery equivalent circuit modeling,the model is used to identify the parameters of the parameters required,the emulational model of battery in the Matlab/simulink,the accuracy of the simulation;Finally,the operation control technology of the large-scale battery energy storage power station is studied,and the simulation analysis indicates that the battery energy storage system is the important direction of future research.