Research On High Gain Boost Converter In PV-TE Hybrid Power System

Nowdays,the world of traditional energy exhaustion and the world environmental pollution increased year by year,in this context,the solar photovoltaic power generation system with its unique clean,excellent price,large reserves of the people have been favored.However,in the whole process of power generation,photovoltaic panels with increasing temperature,and its use efficiency life power will be greatly reduced,which leads to the photovoltaic cell can only be a small part of the solar energy into electricity,and most of the remaining solar energy into heat.In order to solve this problem,the start of the photovoltaic cell itself for cooling treatment,in addition,many based on photovoltaic power generation hybrid The system gradually emerged[1-2].photovoltaic-Thermal hybrid power system(PV-TE),the implementation of the ladder level based on the use of solar energy,improve the conversion efficiency of solar,as a representative of photovoltaic power generation in the hybrid system.In this paper,through the research of photovoltaic-Thermal Boost converter(PV-TE)hybrid power generation system,further to after converting the photoelectric converter through DC/DC power dual power input,the photothermal complementary thought,can not only waste heat loss of traditional photovoltaic system in reasonable use,but also improve the utilization rate of solar energy And system operation total efficiency[3-4].In order to ensure the normal operation of hybrid power system,improve the voltage gain of the traditional double input Boost converter,reduce the current ripple of input and output,reduce the converter losses,optimize the converter output power quality,the switch inductance unit used in the traditional double input converter.A Boost converter with unit switch inductance and magnetic integration is presented in this paper.Using switching inductance instead of traditional energy storage inductor and integrating all inductors into a coupled inductor,this method not only sufficiently reduces the size of the magnetic device,but also optimizes the transient state performance of the converter.The operating mode of the converter is analyzed,and the voltage gain expression of the converter is derived.Compared with the classical converter,the voltage gain of the converter proposed in this paper is)1(4 +D times of that of the traditional converter.According to the different work mode of double input converter,according to the actual use of the corresponding demand situation,given the small signal dynamic model of Boost converter,design the corresponding controller mode,in order to improve the performance of the system.Finally,the principle analysis and formula deduction are verified by simulation and experiment.The results show that the improved dual input high gain Boost converter has good comprehensive performance.