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	2013/01
形態種別	学術論文
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	Power System Protection and Control
出版社・発行元	Xuchang KETOP Electrical Apparatus Testing & Research Institute
巻・号・頁	41(1),pp.183-189
著者・共著者	Jie Zhang, Ryuichi Yokoyama, Jinhua She, and Min Wu
概要	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.