Title :
A 31-level cascade inverter for power applications
Author :
Lee, C.K. ; Hui, S. Y Ron ; Chung, Henry Shu-Hung
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, China
fDate :
6/1/2002 12:00:00 AM
Abstract :
Power inverter modules fed with separate DC 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 DC 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
Keywords :
DC-AC power convertors; digital-analogue conversion; electrolytic capacitors; flexible AC transmission systems; invertors; phase shifters; uninterruptible power supplies; 31-level cascade inverter; DC voltage sources; chain-cell converter; digital-to-analog converter; electrolytic capacitors; flexible AC transmission; power applications; power inverter modules; reliability; static phase-shifter; uninterruptible power supply; Capacitors; Digital-analog conversion; Filtering; Inverters; Motor drives; Phase shifters; Power amplifiers; Proposals; Uninterruptible power systems; Voltage;
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2002.1005388
