悬浮电容混合级联式多电平逆变器的研究  

Research on Hybrid Cascaded Multi-level Converter with Floating Capacitor

作　　者：韩俊 韩金刚[2] 黄河 陈皓菲 陈曦 史静 HAN Jun;HAN Jingang;HUANG He;CHEN Haofei;CHWN Xi;SHI Jing(Economic Research Institute,State Grid Jiangsu Electric Power Co.,Ltd,Nanjing 210008,China;Logistics Engineering College,Shanghai Maritime University,Shanghai 201306,China;State Grid Jiangsu Electric Power Co.,Ltd,Nanjing 210000,China)

机构地区：[1]国网江苏省电力有限公司经济技术研究院,南京210008 [2]上海海事大学物流工程学院,上海201306 [3]国网江苏省电力有限公司,南京210000

出　　处：《电源学报》2018年第6期71-76,共6页Journal of Power Supply

基　　金：上海市自然科学基金资助项目(15ZR1419800;16ZR1414300);国网江苏省电力公司科技资助项目(J2016029)~~

摘　　要：在传统的级联式多电平变换器的基础上提出了一种混合主从级联式变换器。该变换器由一个传统的非对称三电平H桥和一个对称的H桥级联构成。非对称H桥作为主变流单元由直流电源直接供电;而对称的H桥作为从变流单元由一个悬浮电容提供能量。与传统的级联多电平变流器相比,在输出相同电平的情况下需要较少的器件。文中详细分析了该拓扑的工作原理和悬浮电容电压平衡的方法,并在Matlab/Simulink中进行了仿真分析。最后制作了一台实验装置,并通过现场可编程门阵列FPGA(field programmable gate array)对该实验装置实现了实时控制,通过仿真和实验结果的对比,验证了理论分析的正确性。Based on the conventional cascaded multi-level converter,a hybrid client-server cascaded multi-level converter is presented in this paper.This converter is composed of a conventional asymmetric 3-level H-bridge and a symmetric H-bridge.As the main converter unit,the asymmetric H-bridge is directly powered by a DC power source,while the symmetric H-bridge acting as a supplementary converter unit is powered by a floating capacitor.Compared with the conventional cascaded multi-level converter,this topology needs fewer devices when generating the same number of output levels.The operation principle of the converter and the balance control method of the floating capacitor were analyzed in detail,and simulation analysis was carried out based on MATLAB/SIMULINK.Finally,an experimental device was fabricated,and its real-time control was realized by means of a field programmable gate array(FPGA)controller.The correctness of theoretical analysis was validated by the comparison between simulation and experimental results.

关 键 词：悬浮电容 多电平逆变器 电容电压 现场可编程门阵列 

分 类 号：TM464[电气工程—电器]