混合级联式中频逆变器控制策略  

Control Strategy of Hybrid Cascade Inverter with Medium Frequency

作　　者：何凯益 陈轶涵[1] 龚春英[1] 邓翔[1] 

机构地区：[1]江苏省新能源发电与电能变换重点实验室,南京航空航天大学,南京210016

出　　处：《南京航空航天大学学报》2014年第1期78-85,共8页Journal of Nanjing University of Aeronautics & Astronautics

摘　　要：针对高功率密度航空中频逆变器研制要求,采用混合级联式多电平逆变器的方案在减小输出滤波器的重量和体积上有显著优势,同时还能保证较好的输出特性和减小电磁干扰。本文对2H混合级联结构传统混合调制工作原理及存在的功率倒灌问题进行了详细分析研究,获得倒灌功率大小与主要参数的关系,为消除功率倒灌问题采用了单极性载波层叠调制方法,并对单极性载波层叠调制混合级联逆变器调制原理和输出特性进行了分析,并通过仿真进行了验证。To satisfy the requirements of high power density for aeronautical static inverters, the hybrid cascaded multilevel inverter scheme is proposed because of its advantage in reducing the weight and the volume of the output filter. Meanwhile, it can also ensure the good output characteristic and reduce the electromagnetic interference. With the structure of 2H-bridges, the traditional hybrid modulation and the power intrusion problem are analyzed, and the relationship between the reverse power size and main parameters is obtained. According to the power intrusion problem, the modulation method of single multilevel level-shifted carrier-based modulation is adopted, and the modulation process and the output characteristics are analyzed. Finally, the control strategy is verified by simulation.

关 键 词：混合级联逆变器 混合调制 功率倒灌 单极性载波层叠调制 

分 类 号：TM464[电气工程—电器]