摘要
提出一种新型单级升降压多电平逆变器,该逆变器可适应输入直流电压的大范围变化,在可再生能源的能量转换、存储及传送系统中有重要的应用前景。该升降压多电平逆变器由Buck-Boost变换器推演而来,利用电感作为储能和均衡元件,无需电解电容,具有较高的可靠性和较长的使用寿命。本文介绍了升降压多电平逆变器的拓扑结构和基本工作原理。在分析其均流特性的基础上,选择载波反相PWM调制策略,实现该逆变器的自均流。最后给出仿真和实验结果,对理论分析进行验证。
A novel single-stage Buck-Boost multilevel inverter is proposed, which is adapt to wide range varied DC input voltage and is of important prospect in the system of energy conversion, storage and transmission of renewable sources. The proposed Buck-Boost multilevel inverter, deduced from Buck-Boost converter, applies inductor instead of electrolytic capacitor as storage and equilibrium component, which is of more reliability and longer service life. The topology structure and operating principle are introduced in this paper. Based on the analysis of its current sharing feature, phase opposition disposition PWM （POD-PWM）is serter. Simulation and experiment results are provided to validate the correctness of theoretical analysis.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2016年第1期47-55,共9页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(50837003)
河北省自然科学基金(E2012203085)
关键词
升降压多电平逆变器
单级
可再生能源
载波反相PWM
自均流
Buck-Boost multilevel inverter
single-stage
renewable source
phase opposition disposition PWM （POD- PWM ）
self current sharing
