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Discontinuous Current Mode Control for Minimization of Three-phase Grid-Tied Inverters in Photovoltaic System

Discontinuous Current Mode Control for Minimization of Three-phase Grid-Tied Inverters in Photovoltaic System

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カテゴリ: 論文誌(論文単位)

グループ名: 【D】産業応用部門(英文)

発行日: 2019/01/01

タイトル(英語): Discontinuous Current Mode Control for Minimization of Three-phase Grid-Tied Inverters in Photovoltaic System

著者名: Hoai Nam Le (Nagaoka University of Technology), Jun-ichi Itoh (Nagaoka University of Technology)

著者名(英語): Hoai Nam Le (Nagaoka University of Technology), Jun-ichi Itoh (Nagaoka University of Technology)

キーワード: three-phase grid-tied inverter,continuous current mode,discontinuous current mode

要約(英語): In this paper, a current control method for discontinuous current mode (DCM) is proposed for a three-phase grid-tied inverter to minimize inductors without worsening current total harmonic distortion (THD). In conventional continuous current mode (CCM) control, current THD increases as an inductor value is reduced because a zero-clamping phenomenon occurs due to dead-time. In the proposed DCM current control, a zero-current interval is intentionally controlled and a dead-time-induced error voltage is simply compensated with conventional dead-time feedforward compensation. The validation of the control method is confirmed by simulations and a 700-W prototype. Compared to conventional CCM current control, the current THD is reduced by 97.6% with the proposed DCM current control, whereas the inductor volume is reduced by 70%. In the experiments, the current THD is maintained below 5% over load range from 0.3p.u. to 1.0p.u. even when the inductance impedance is reduced to 0.5% of the inverter total impedance.

本誌: IEEJ Journal of Industry Applications Vol.8 No.1 (2019)

本誌掲載ページ: 90-97 p

原稿種別: 論文/英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejjia/8/1/8_90/_article/-char/ja/

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