摘要
为了提高逆变器的电压和功率等级,提出了一种级联五开关H桥多电平逆变器拓扑结构的功率均衡控制方法。该方法采用了同相交错层叠锯齿载波移相调制,综合了同相层叠锯齿载波调制良好的消谐特性以及载波移相调制各个单元功率分配均衡的优点,使级联五开关H桥多电平逆变器拓扑结构中各个功率单元不仅可以输出五电平,保持良好的消谐特性,而且可以在一个输出周期内实现功率均衡。以3个功率单元为例,进行了仿真实验。实验结果验证了该拓扑结构及其控制方法的可行性与优越性。
A power balance control scheme of cascaded multilevel inverter with five switches for each H-bridge unit is proposed in this paper to improve the voltage and power levels of the inverter. Phase disposition modulation and phaseshift modulation are adopted, which has advantages of both good harmonic characteristics owing to phase disposition modulation and power balance distribution for each H-bridge unit owing to phase-shift modulation. The proposed scheme can not only output five levels that have good harmonic characteristics, but also achieve the output power balance in one output cycle for each cell. A cascaded inverter consisting of three cells is taken as an example in the simulation, and the result verifies the validity and superiority of the proposed topological structure and its control scheme.
作者
叶满园
康翔
YE Manyuan KANG Xiang(School of Electrical and Automation Engineering, East China Jiaotong University, Nanchang 330013, China)
出处
《电力系统及其自动化学报》
CSCD
北大核心
2017年第2期27-31,共5页
Proceedings of the CSU-EPSA
基金
国家自然科学基金资助项目(51167006)
江西省自然科学基金资助项目(2016BAB206157)
江西省工业支撑资助项目(2016BBE50057)
关键词
五开关H桥
同相层叠
锯齿载波
移相调制
多电平逆变器
功率均衡控制
H-bridge with five switches
phase disposition
saw-tooth carrier
phase-shift modulation
multilevel inverter
power balance control
