シャ　キンカ   Jinhua She   佘　錦華    所属   工学部 機械工学科    職種   教授
言語種別	英語
発行・発表の年月	2012/06
形態種別	国際会議論文
査読	査読あり
標題	Neutral-Point Voltage Control for a Three-Level DC-AC Inverter Using Equivalent-Input-Disturbance Approach
執筆形態	共著
掲載誌名	The 3rd Symposium of Power Electronics and Distributed Generation Systems (IEEE PEDG 2012)
出版社・発行元	IEEE
巻・号・頁	pp.398-402
著者・共著者	Jie Zhang, Ryuichi Yokoyama, and Jinhua She
概要	One problem with a single-voltage source, threelevel 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 neutralpoint voltage is converted to a disturbance rejection problem. This method suppresses the variation of the neutral-point voltage to a small level and reduces the capacity of capacitors. Simulation results show the effectiveness of the method.