基于开关状态预测矫正的高频电力电子变换器实时仿真建模方法研究  

Research on the Real-time Simulation Modeling Method for High Switching Frequency Power Electronic Converter Based on Predicting and Correcting the Switch Status

作　　者：孙宗辉 郭希铮[1] 王诗楠 王玉乐 游小杰 SUN Zonghui;GUO Xizheng;WANG Shinan;WANG Yule;YOU Xiaojie(School of Electrical Engineering,Beijing Jiaotong University,Haidian District,Beijing 100044,China;Collaborative Innovation Center of Railway Traffic Safety,Beijing Jiaotong University,Haidian District,Beijing 100044,China)

机构地区：[1]北京交通大学电气工程学院,北京市海淀区100044 [2]北京交通大学轨道交通安全协同创新中心,北京市海淀区100044

出　　处：《中国电机工程学报》2024年第21期8618-8628,I0024,共12页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：中央高校基本科研业务费专项项目(科技领军人才团队项目)(2022JBXT006)。

摘　　要：针对二值电阻(R_(on)/R_(off))开关模型固有的迭代计算问题,该文提出一种适用于高频电力电子变换器的实时仿真建模方法。该方法采用后向欧拉方法离散系统状态变量,消除模型潜在的数值振荡。同时,通过匹配门控信号以及自然换向过程中半桥开关状态组合的预测值与历史值,进而获得准确的系统开关状态组合,为系统提供精确的非迭代解。最后,该文给出所提建模方法的现场可编程门阵列(field programmable gate array,FPGA)硬件实现方案并实时测试开关频率100与500kHz的LLC谐振变换器,实时仿真步长达到20ns。与已有取消R_(on)/R_(off)开关模型迭代计算的建模方法相比,该文所提建模方法在高精度建模的同时,实现更低的实时仿真步长并且大幅降低FPGA硬件资源占用率。Aiming at the inherent iterative calculation problem of resistance(R_(on)/R_(off))switch model,this paper proposed a real-time simulation method for high-frequency power electronic converter.The backward Euler method was used to discrete the state variables,which can eliminate the potential numerical oscillation of the model.Meanwhile,the actual switch status combination was obtained by analyzing the gating signals and matching the predicted switch status combinations with the historical switch status combinations of half-bridge arms,which provided accurate non-iterative solutions for the system.Finally,this paper gave the field programmable gate array(FPGA)hardware implementation scheme and tested the LLC resonant converters with 20 ns simulation time step,100 kHz switching frequency and 500 kHz switching frequency in real time.Compared with the existing methods which deal with the iterative calculation of Ron/Roff switch model,the modeling method proposed in this paper achieves a lower real-time time step and reduces the FPGA hardware resource footprint while modeling with high precision.

关 键 词：迭代计算 二值电阻开关模型 实时仿真 高频电力电子变换器 LLC谐振变换器 

分 类 号：TM743[电气工程—电力系统及自动化]