A new type of single-phase five-level inverter

2017 3rd International Conference on Energy, Environment and Materials Science

能源学;生态环境科学;材料科学

Xu, Zhi^1 ; Li, Shengnan^1 ; Qin, Risheng^1 ; Zhao, Yanhang^2

Electric Power Research Institute, Yunnan Electric Power Company, Kunming

650000, China^1

State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing

400044, China^2

关键词: Direct current voltage;    Hysteresis comparator;    Multilevel inverter;    Neutral point clamped;    Neutral point potential;    New five-level inverters;    Single phase five level inverters;    Utilization rates;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/94/1/012036/pdf
DOI  :  10.1088/1755-1315/94/1/012036

来源: IOP

【 摘 要 】

At present, Neutral Point Clamped (NPC) multilevel inverter is widely applied in new energy field. However, it has some disadvantages including low utilization rate of direct current (DC) voltage source and the unbalance of neutral potential. Therefore, a new single-phase five level inverter is proposed in this paper. It has two stage structure, the former stage is equivalent to three level DC/DC converter, and the back stage uses H bridge to realize inverter. Compared with the original central clamp type inverter, the new five level inverter can improve the utilization of DC voltage, and realize the neutral point potential balance with hysteresis comparator.