摘要
为了提高级联H桥和五开关级联多电平逆变器的电平数,并减少开关器件和直流电源的数量,提出了一种不对称的级联五开关逆变器拓扑结构。该逆变器由2个不对称六电平逆变器反向级联而成,输出电压可达15电平。在相同的输出电平数下,该逆变器拓扑结构比传统级联H桥多电平逆变器减少了1个直流电源和18个开关器件。给出了相应基于正负反向层叠的调制方法,通过将输出电压波形与目标波形进行比照,对PWM脉冲信号进行逻辑组合得到开关管的驱动信号。最后通过MATLAB2016/Simulink软件搭建仿真平台进行验证,结果证明了所提逆变器拓扑结构及其控制策略的正确性及可行性。
In order to improve the level of cascaded H-bridge and five-switch cascaded multilevel inverters,and reduce the number of switching devices and DC power supply,an asymmetric cascaded five-switch inverters topology is proposed. The inverter is composed of two asymmetric six-level inverters cascaded in reverse,and the output voltage can reach 15 levels. At the same output level,the topology of the inverter reduces 1 DC power supply and 18 switching devices compared with the traditional cascaded H-bridge multilevel inverters. The corresponding modulation method based on positive and negative stacking is given. The driving signal of the switch is obtained by comparing the output voltage waveform with the target waveform and combining the PWM pulse signal logically. Finally,a simulation platform is built by MATLAB2016/Simulink software to verify the correctness and feasibility of the proposed inverter topology and control strategy.
作者
胡文华
章超凡
HU Wenhua;ZHANG Chaofan(School of Electrical and Automation Engineering,East China Jiaotong University,Nanchang 330013,China)
出处
《实验室研究与探索》
CAS
北大核心
2020年第6期56-59,共4页
Research and Exploration In Laboratory
基金
国家自然科学基金项目(51567009)
江西省科技厅重点研发计划(20192BBE50017)。
关键词
不对称级联
多电平逆变器
五开关
逻辑组合
asymmetric cascade
multilevel inverter
five-switch
logical combination
