A Simple Space Vector Modulation to Eliminate Zero Sequence Voltage with Balanced Neutral Point Voltage for a New Five-Level Voltage Source Inverter
Main Article Content
Abstract
In the paper, a new three-phase five-level voltage source inverter (VSI) topology is developed by utilizing six three-level F-type legs. The proposed topology reduces the number of power electronic components while operating with a single DC source, offering advantages over conventional three-phase five-level VSI topologies. The operating principles are analyzed theoretically, and a simplified space vector modulation (SVM) method is introduced to control the proposed topology. In the proposed SVM approach, 19 voltage vectors are strategically selected for modulation to regulate the inverter while effectively eliminating the zero-sequence voltage (ZSV) component. Furthermore, balanced capacitor voltages are achieved by leveraging the opposite effects of redundant switching states on the neutral-point voltage. Consequently, the proposed SVM method enables simultaneous capacitor voltage balancing and elimination of the zero-sequence voltage (ZSV) component without requiring the adjustment of a balancing control factor. Simulation results are presented to validate the effectiveness of the proposed VSI topology and its modulation strategy.
Keywords
Balanced capacitor voltages, five-level voltage source inverter, space vector modulation, zero-sequence voltage component.
Article Details
References
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