Neutral-point voltage control for a three-level DC-AC inverter using equivalent-input-disturbance approach
One problem with a single source three-level inverter is the drafting of its neutral-point voltage. This may occur during transition or when unbalanced loads are connected to the inverter system. Variation of neutral-point voltage may greatly deteriorate the power quality. In this paper, we employ an equivalent-input-disturbance approach to deal with this problem. By adding an extra neutral leg, the control problem of neutral-point voltage is converted to a disturbance rejection problem. This method suppresses the variation of the neutral-point voltage to a low level and reduces the capacity of DC-link capacitors. Simulation results show the effectiveness of the method.
inverter、multi-level、neutral-point voltage、EID、disturbance
TM464(变压器、变流器及电抗器)
2013-01-29（万方平台首次上网日期，不代表论文的发表时间）
共7页
183-189
