A Simplified Space Vector Modulation Method for VIENNA Rectifier Considering Equilibrium of Neutral Point Potential
When energy is not transferred bidirectionally,conventional two-level and three-level converters have some defects.In order to eliminate the defects,the topology and working mechanism of the three-level,three-switch VIENNA rectifier are analyzed in this paper.Because VIENNA rectifier will produce neutral point poten-tial pulsation on the DC side,adding the voltage variation parameter of DC bus capacitor to the duty ratio distribu-tion of SVPWM algorithm can change the vector action time and realize neutral point potential equalization.Mean-while,a simplified SVPWM modulation method for three-level to two-level conversion is studied.The practical-ity and effectiveness of the method are tested and verified.
VIENNA rectifierequilibrium of neutral point potentialsimplified SVPWM
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