A Passive LC Filter Based Harmonic Compensation for Multilevel Cascaded Inverters under Unbalanced DC Sources Using NVM Control Technique
Journal Title: International Journal of Science Engineering and Advance Technology - Year 2015, Vol 3, Issue 12
Abstract
This paper proposes passive lc filter network based multilevel cascaded inverters with pulse width-modulation strategy to achieve balanced line-toline output voltages and to maximize the modulation index in the linear modulation range where the output voltage can be linearly adjusted in the multilevel cascaded inverter (MLCI) operating under unbalanced dc-link conditions. A neutral voltage modulation strategy is proposed to achieve output voltage balancing as well as to extend the linear modulation range up to the maximum reachable point in theory. In the proposed method, too large of a dc-link imbalance precludes the balancing of the output voltages. The simulations for a seven-level phase-shifted modulated MLCI for electric vehicle traction motor drive show that the proposed method is able to balance line-to-line output voltages as well as to maximize the linear modulation range under the unbalanced dc-link conditions.
Authors and Affiliations
Bhargav kumar. G| M.Tech, Scholar, Dept of EEE, Lenora College of Engineering, Rampachodavaram, Deepti Priyanka. S| Assistant Professor, Dept of EEE, Lenora College of Engineering, Rampachodavaram
Keywords
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