Based On The Hybrid Energy Storage Of Photovoltaic Grid System Run Control Research

In recent years,with the energy crunch and environmental matters consolidated,represented by photovoltaic(pv)of the allocated power engender skill has been broad obstructed.But,pv power engender is susceptible to environmental impact,randomness and intermittent problems,pv micro grid based on hybrid energy storage will settle this issue very well.Light store dc micro grid contains a variety of micro source,how to make the micro source energy equilibrium,to maintain a stable operation system is the focus of this article.Based on the dc micro grid storage of light as the research object,on running in the system control strategy is studied.First,set the light dc micro grid storage system topology structure,the photovoltaic module,the hybrid energy backlog battery and sc,mathematical modeling,and the energy backlog trait and control recipes are assayed.Handlng claims based on the system scheme of the photovoltaic Maximum Power Point Tracking(Maximum Power Point Tracking,MPPT)strategy with Constant pressure control(Constant Voltage Charging,CVC)two kinds of control strategy.For grid converter module and control strategy are studied.Second,the Hybrid Energy Storage System(Hybrid Energy Storage System,HESS)was researched,and decided the topological assumption of Hybrid Energy Reservoir and Energy Storage power allocation principle,profit of the characteristics of super capacitor response speed to ease of unbalanced power high frequency part,using the advantage of high Energy density battery to absorb low-frequency power.Design the battery charged State(State of Charge,SOC)limit management strategy,avert energy inventory unit Charge vent,extent the use time of the battery.Adopt virtuing the sc consult current,and improve the hybrid energy storage system dynamic response speed,make dc bus voltage stability returns quickly.The simulation proved the validity of the raised control tactics.Finally,research an improved optical store dc micro power grid operation control strategy,the micro grid controller as the control center,according to the light within the dc micro network storage system control strategy of the converter in running system can be divided into six kinds of working mode,make each coordinate converter operation,through the dc bus voltage and energy storage module SOC implementation work mode of the converter smooth switch,ensure the stable operation of the dc micro grid system.Light dc micro grid storage system hardware circuit design,and built in the Matlab/Simulink simulation model,the simulation experiment results show that the dc bus voltage ripple the maximum is 3.9%,and the dc bus voltage can restore stability within 0.12 s,satisfies the requirement of system operation.Fig.[55] Table [7] Reference [80]...