基于改进PSO算法的高增益DC/DC变换器小信号模型辨识  

Small signal model identification for high step-up DC/DC converter with improved PSO algorithm

作　　者：陈佳 郭玉祥 刘红霞 王佳豪 宋久旭[1] CHEN Jia;GUO Yuxiang;LIU Hongxia;WANG Jiahao;SONG Jiuxu(Shaanxi Key Laboratory of Measurement and Control Technology for Oil and Gas Wells,Xi'an Shiyou University,Xi'an Shaanxi 710065,China;Xi'an Microelectronics Technology Institute,Xi'an Shaanxi 710018,China)

机构地区：[1]西安石油大学陕西省油气井测控技术重点实验室,陕西西安710065 [2]西安微电子技术研究所,陕西西安710018

出　　处：《太赫兹科学与电子信息学报》2025年第4期393-402,共10页Journal of Terahertz Science and Electronic Information Technology

基　　金：陕西省重点研发计划资助项目(2022GY‒135)。

摘　　要：高增益DC/DC变换器在新能源发电和直流微网中具有良好的应用前景,而良好的动态特性是其应用的基础。与传统开关变换器相比,高增益变换器建模存在计算量大和模型阶数高等难题。本文基于系统辨识的高增益变换器系统建模新方法,在分析三绕组Boost‒Forward变换器工作原理基础上,采用状态空间法建立变换器的小信号模型,并对建立模型正确性进行仿真验证。重点分析了状态空间法建模误差的来源,使用最小二乘法初步提取变换器的小信号模型,系统模型精确度为91.43%;进而使用改进粒子群(PSO)算法精确提取小信号模型,系统模型辨识精确度为94.62%。数值实验结果证明了本文辨识方法的正确性。该结果对复杂变换器的建模和控制回路设计有较高参考价值。High-gain DC/DC converters have a promising application prospect in new energy generation and DC microgrids,and good dynamic characteristics are the foundation of their applications.Compared with traditional switching converters,high-gain converters face challenges such as high computational complexity and high model order in modeling.A new modeling method is proposed for high-gain converters based on system identification.It analyzes the working principle of the three-winding Boost‒Forward converter and establishes a small-signal model of the converter using the state-space method.The correctness of the established model is verified through simulation.The sources of modeling errors in the state-space method are analyzed.The small-signal model of the converter is initially extracted using the least squares method,with a system model accuracy of 91.43%.Subsequently,an improved Particle Swarm Optimization(PSO)algorithm is employed to accurately extract the small-signal model,achieving a system model identification accuracy of 94.62%.Numerical experimental results demonstrate the correctness of the proposed identification method.The results have high reference value for the modeling and control loop design of complex converters.

关 键 词：高增益DC/DC变换器 频域辨识 最小二乘法 改进粒子群算法 

分 类 号：TN712[电子电信—电路与系统]