Research On The Reverse Injected Harmonic Elimination Of High Quality ICPT System Based On Harmonic Dection

Wireless Power Transfer(WPT)refers to a mode that electrical energy is transmitted in a contactless form through transfer medium in the physical space.With the improvement of society,WPT technology,especially inductively coupled power transfer(ICPT)technology,has attracted more and more attention in advantage of long distance transfer,independent of transfer medium,careless of transfer direction.With the application of power electronic technology in ICPT system,harmonic is introduced into the system at the same time.The harmonics in ICPT have a bad effect on the system,including: increasing heat of system,increasing system loss,increasing electromagnetic radiation and serious distortion of waveform in some special topology.With the increasing demand for power quality,the harmonics problem in the ICPT system has gradually become one of the factors hinder the development of ICPT technology.Furthermore,how to eliminate the harmonics and improve the power quality of ICPT system has become a new research hotspot.Based on the ICPT harmonic problem,this paper proposes a reverse injected harmonic elimination of high quality ICPT system based on harmonic dection.First of all,research status at home and aboard is summarized,which sums up harm of harmonics to ICPT system.Secondly,this paper analyzes the harmonic in detail.On the basis of principle of ICPT system,high frequency inverter,the harmonic source,is analyzed.According to harmonic problem in the system,this paper proposes a transfer admittance gain model based on LCL-S topology ICPT system.And the model is used to analyze the harmonic problem in ICPT system qualitatively and quantitatively.Then,based on the principle of active filter,this paper proposes a reverse injected harmonic elimination of high quality ICPT system based on harmonic dection.Moreover,the main circuit topologies and harmonic dection network is analyzed in detail.Furthermore,based on the proposed system,this paper describes the principle of proposed system in detail.The circuit model is constructed for SS and LCL-S topology respectively.What's more,this paper analyzes impedance reflection,harmonic dection network and harmonic elimination,and the harmonic elimination factor ? is proposed.Finally,in order to validate the exactness of analysis and theory,Matlab/Simulink circuit and experiment platform are set up respectively.The platform and simulation results are consistent with theoretical analysis,which verifies the correctness of the proposed theory.