cascade inverter;
flexible ac transmission;
multilevel converters;
power amplifiers;
D O I:
10.1109/TIE.2002.1005388
中图分类号:
TP [自动化技术、计算机技术];
学科分类号:
0812 ;
摘要:
Power inverter modules fed with separate de voltage sources of voltage ratio 1:2:4:8 are connected to form a cascade multilevel inverter. This new proposal combines the advantages of the static phase-shifter and chain-cell converter concept. Using the same number of power devices as a standard nine-level inverter, the proposed converter operates as a high-power digital-to-analog converter with 31-level resolution. Electrolytic capacitors used in the proposed inverter for providing the de voltage sources will never be connected in opposite polarity in all cases, thus ensuring high reliability. The proposal has the potential for uninterruptible power supply and flexible ac transmission applications.