10kVA Inverter Power Supply Design And Application

In the modern power grid system,in order to complete the power resource operation and the science application,often use distributed energy storage system,and in distributed energy storage system,battery as energy storage unit,the most rapid development of the energy storage system the most common,inverter is an important part of distributed energy storage system,used in the storage battery dc power is converted into power frequency ac power for the appliances,belong to discharge part of the energy storage system.This paper discusses the development and research status of inverter,focuses on the study of inverter power supply in distributed storage system present situation and development trend.Inverter power supply is introduced in the paper the working principle of several main topology,points out their respective advantages and disadvantages,choose the suitable topology structure of high-power situation;Several mainstream modulation method,analyzed their fundamental wave and harmonic components.Proposed inverter power index and system backup time for the system is equipped with battery capacity,according to design index system for the parallel design at the same time.Design the machine structure of inverter power supply system and each circuit part including the selection of devices,etc.In the fifth chapter discusses the inverter general principles and the principle of feedback control system design,on the basis of the complete feedback voltage and current of the inverter power supply circuit design,this paper according to the mathematical modeling of inverter design index,established the open loop transfer,and on the matlab simulation,and according to the principles of stability design for voltage outer loop PI regulator and the current inner loop PI regulator,and the simulation was carried out,to ensure that the inverter power supply working in steady state is reasonableFinally has carried on the test to the working state of the inverter power supply,tested under different power,duty ratio,the phenomenon of switching devices made analysis,record the output waveform under various loads,recorded the variousconditions of a thermal imager temperature conditions and distribution of the whole system,the working efficiency and battery are flow condition,verify the rationality of the design of the inverter system and energy storage system,and made a summary to full text work,for the future design of high-power inverter power supply method to make the future.