Thermal Design And Structural Optimization Of High Power Photovoltaic Inverter

In recent years,solar photovoltaic power generation technology is improving,the scale of its related industries have been greatly developed and enhanced.PV inverter as a part of the industrial chain,the application scale is also increasing year by year.With the growing application of photovoltaic inverter technology and cost pressures continue to increase,the inverter product size is getting smaller and smaller,power density and heat flux density is also growing,especially for power station type applications of high power photovoltaic inverse Variable device,this feature is particularly prominent.In order to solve the problem of thermal deposition of high power PV inverters,this paper studies the thermal design and thermal analysis of specific examples,and finds out the potential overheat problems and design improvements,not only shorten the product development The cycle also increases the reliability of the product.This paper studies the overall design of high power photovoltaic inverter,rational layout of the inverter structure.Based on Ansys Icepak heat flow analysis software,a detailed thermal design of the whole system was carried out.The factors influencing the air duct impedance of the whole system are analyzed,and the scheme of improving the air duct is put forward.And a fast method to obtain the impedance curve of the system is given.The mathematic model of a typical fan heatsink module system is established.The mathematical model is programmed by VBA,the result is curve,and the curve fitting method is used to calculate the intersection function of the curve.This paper presents a method to simplify the whole system into a fan heatsink component system.The accuracy of the method is verified by comparing the results with the simulation results.In the simplified analysis model,through the mathematical analysis of the radiator in the research object,the optimization interval of the geometric parameters of the radiator is obtained.On the basis of this,the optimal design of the DOE experiment was optimized by using the heat flow analysis software,and the optimal scheme was selected.And then use the optimization module of the software itself to further optimize the selected program to obtain a comprehensive optimal solution,and applied to the whole system simulation model,run the simulation to get the functional device simulation temperature data.The prototype system was tested to get the actual temperature data of each functional device,and the accuracy of the simulation analysis was verified by comparing with the simulated temperature data.