Common-Ground Transformerless Inverter with Virtual DC Bus Concept for Single-Phase PV Systems

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: 2020/09/01

タイトル(英語): Common-Ground Transformerless Inverter with Virtual DC Bus Concept for Single-Phase PV Systems

著者名: Saad Ul Hasan (School of Electrical and Data Engineering, University of Technology Sydney), Hassan Athab Hassan (Department of Electrical and Computer Engineering, Miami University), Mark John Scott (Department of Electrical and Computer Engineering, Miam

著者名(英語): Saad Ul Hasan (School of Electrical and Data Engineering, University of Technology Sydney), Hassan Athab Hassan (Department of Electrical and Computer Engineering, Miami University), Mark John Scott (Department of Electrical and Computer Engineering, Miami University), Yam Prasad Siwakoti (School of Electrical and Data Engineering, University of Technology Sydney), Graham Town (School of Engineering, Macquarie University), Frede Blaabjerg (Department of Energy Technology, Aalborg University)

キーワード: common mode (CM) current，photovoltaic (PV) systems，transformerless inverter，unipolar sinusoidal pulse width modulation (SPWM)，virtual DC bus

要約(英語): This study investigates a single-phase common-ground transformerless inverter topology for grid-connected photovoltaic (PV) systems. The inverter shares a common ground with the grid and utilizes minimal components for power conversion, making it suitable for use as an integrated microinverter for solar PV modules. The peak of the ac output voltage is the same as the input DC voltage, and a virtual DC bus capacitor is used to provide power during the negative cycle of the inverter. A simple unipolar sinusoidal pulse-width modulation technique is used to modulate the inverter minimizing switching loss, output filter requirements, and output current ripple. Moreover, a double-charging process is employed to minimize the inrush charging current of the virtual DC bus capacitor. Various operating states along with the design guidelines for choosing the constituent components are presented. Finally, some simulation and experimental results are presented for a 1kW prototype to validate the proposed topology.

本誌: IEEJ Journal of Industry Applications Vol.9 No.5 （2020）

本誌掲載ページ: 538-548 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/9/5/9_538/_article/-char/ja/