Theory And Application Research On Solar Energy PV-LED System

At present,the whole world is faced with the shortage problem of energies.Therefore,energies and sustainable development of the environment become the most concerned issue of human beings.Solar energy is a new energy which is renewable.Solar energy PV-LED system is the necessary choice of establishing energy-saving and environmental socity,which can maintain the long-term economic benefits of the nation.Solar energy streetlights are a kind of electric product which transfer light energy to electric energy.They are easy to set and convenient to control.There is no need to dig the tunnels and arrange the wires.They are safe,energy-saving and environmental.Their positions also can be changed by practical situations.This paper are based on the essential theories of solar energy PV-LED system,analysis of LED system,design of solar energy streetlight system equipment and software.It researches and analyzes on the case study of the first stage landscape lighting project in Changchun Dream Town.Solar energy streetlights use light source as the main energy.They absorb light source,reserve it in storage batteries during the daytime and transfer it into electric energy during the nighttime,namely,use the charging and discharging function of storage batteries.Solar energy streetlights are consist of solar energy battery components,LED lamp cap,controller,storage batteries and lamp standard.They have simple operation principles.The controller of solar energy streetlights is the unitary PLC,which set all the components in one enclosure.This will create a reasonable and ordered system process,promote the charging efficiency of streetlights and extend service life of storage batteries.The software design of solar energy streetlights uses Siemens S7-200 system,CPU224 as core processor and EM235 as analog signals measure.The lightening part will open depend on brightness detection and time setting.It will use the electricity test of storage batteries to switch working situations.The second stage landscape lighting project in White City of Country Garden is Green Two-star Standard Construction Project.Parts streetlights in this project use dual power supply system,improve the stability of solar energy streetlights and ensure their working in different weather conditions.Solar energy and electric supply are supplement and cover the shortage.