多电平级联H桥逆变器通用型离散模型及分岔与混沌行为特性分析  

General discrete model and analysis of bifurcation and chaotic behavior in multi-level cascaded H-bridge inverter

作　　者：杨维满[1,2] 王富强 李锦键 王兴贵 张钰沛[1] YANG Weiman;WANG Fuqiang;LI Jinjian;WANG Xinggui;ZHANG Yupei(College of Electrical Engineering and Information Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Gansu Province New Energy Power Conversion and Control Engineering Research Center,Lanzhou 730050,China)

机构地区：[1]兰州理工大学电气工程与信息工程学院,甘肃兰州730050 [2]甘肃省新能源电力变换及控制工程研究中心,甘肃兰州730050

出　　处：《电力自动化设备》2024年第8期145-152,共8页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51867016);甘肃省杰出青年基金资助项目(22JR5RA221);兰州理工大学红柳优秀青年人才计划资助课题。

摘　　要：多电平级联H桥逆变器内部功率器件多、等效开关频率高、开关组合状态繁杂、离散数学模型建立难度大,其分岔、混沌动力学行为难以进行系统性分析。基于虚拟遍历法建立了具有N个单元的多电平级联H桥逆变器通用型离散映射数学模型;引入对交流变量跟踪性能更佳的准比例谐振控制器,并重点分析了比例增益、谐振增益、单元数量N变化以及主电路和控制电路中其他参数变化情况下的分岔、混沌行为特性;对比分析了引入混沌抑制前后系统稳定性变化情况。从方法论角度分别采用根轨迹图和折叠图验证了稳定性分析结果的正确性,并通过PSIM仿真和实验验证了相关结论的正确性和抑制分岔与混沌行为的有效性。Multi-level cascaded H-bridge inverter has numerous internal power devices,high equivalent switching frequency,complex switching combination states,and it is difficult to establish a discrete mathematical model,making its systematical analysis of bifurcation and chaotic dynamic behavior difficult.Based on the virtual traversal method,a generic discrete mapping mathematical model for the multi-level cascaded H-bridge inverter with N units is established.The quasi-proportional resonant controller with better tracking performance for AC variables is introduced,and the bifurcation and chaotic behavior characteristics of the system are analyzed in detail,considering the changes in proportional gain,resonant gain,unit number,and other parameters in the main circuit and control circuit.The stability changes of the system before and after the introduction of chaos suppression are compared and analyzed.From a methodological perspective,the stability analysis results are verified using root locus and bifurcation diagrams,and the correctness of the conclusions and the effectiveness of bifurcation and chaotic behavior suppression are verified through PSIM simulation and experiment.

关 键 词：准比例谐振 级联H桥逆变器 分岔 混沌 混沌抑制 

分 类 号：TM464[电气工程—电器]