Circulating Current Suppression and Current Sharing Strategy for Parallel IPT System Based on d-q Synchronous Rotating Frame  

作　　者：Hao He Youwei Liu Bin Wei Cheng Jiang Songcen Wang Xiaokang Wu Bingwei Jiang 

机构地区：[1]China Electric Power Research Institute,Beijing 100192,China

出　　处：《CSEE Journal of Power and Energy Systems》2025年第2期886-899,共14页中国电机工程学会电力与能源系统学报(英文)

摘　　要：A modular-parallel IPT system with multi-inverters is proposed to enhance power capacity and expansibility for primary power equipment.In order to balance the actual output power of each inverter,a control strategy is designed to minimize circulating-current and equalize output current.In the process of circulating current suppression,current could be decoupled into the following two parts through a d-q synchronous rotating frame:virtual active and reactive current.Then,the above two virtual current components can be adjusted by PWM and PPM.A close-loop control method based on master-slave scheme is proposed to improve the scalability for a practical IPT system,and an impedance matching and its ZCS method is proposed to avoid detuning caused by a change of the number of modules.Finally,an IPT experiment platform with 3-parallel modules is established to verify availability of the proposed control methods.As shown in the experiment,circulating current of the prototype can be reduced from 2.6 A to 0.3 A,and the difference of output power of each module is less than 1%when deviation of the input DC voltage,the delay of driving signals,and the resonant inductance is 10%,respectively.The overall efficiency of the modular IPT system is up to 92.5%at 3.3 kW.

关 键 词：Inductive power transfer d-q synchronous rotating frame circulating current suppression current sharing 

分 类 号：TM724[电气工程—电力系统及自动化]