Applied Research And Integration Design Of Intelligent Energy-storing Emergency Power System Base On Lithium Iron Phosphate Battery

In recent years,the distribution network has developed rapidly,Its power supply reliability causes the grid corporation to pay high attention.Especially in the event of major protection of power supply,the power supply departments shall ensure that no power outage is the highest target during the activity.and do they best to supply the electricity and maintain social stability and normal activities.Especially in important places such as government agencies and hospitals,These places requires high reliability of power supply,Therefore,it is necessary to study the emergency power supply technology for the important load.The fast response speed of power electronics device provides technical supp ort for the quick response capability of emergency power system.This paper presented a theoretical analysis and system integration study of intelligent energy storage emergency power supply based on lithium iron phosphate battery.First,The feasibility of lithium iron phosphate battery in emergency power supply system is analyzed,and discussed mainly from the Angle of battery performance,investment benefit,intelligent coupling,etc.Second,The key technologies to improve the operation life of the lithium iron phosphate battery are analyzed,and the research is mainly from the charging mode and the battery balance ability,a five-stage charging mode is adopted based on the battery characteristics,and then the active equilibrium control strategy is proposed and the equalization circuit is designed.Third,The uninterruptible technology of the emergency power discharge and the quick switch response of the lithium iron phosphate battery is studied,the uninterruptible response capacity is improved By increasing the power protection unit and sampling point criterion.then,This paper proposes an intelligent emergency power integrated design scheme,and realizes the practical application of intelligent emergency power supply through integrated technology.At last,we test the key technologies such as working mode switching,instantaneous response ability and charging mode,the test results show that the designed power supply system meets the expected requirements.