A Comparison of DC/AC and DC/DC Modular Multilevel Energy Conversion Processes

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: 2015/07/01

タイトル(英語): A Comparison of DC/AC and DC/DC Modular Multilevel Energy Conversion Processes

著者名: Gregory J. Kish (The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto), Peter W. Lehn (The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto)

著者名(英語): Gregory J. Kish (The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto), Peter W. Lehn (The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto)

キーワード: DC/AC converter，DC/DC converter，HVDC，modular converter

要約(英語): Using strings of cascaded submodules for multilevel dc/ac conversion has attracted considerable attention owing to the widespread popularity of the modular multilevel converter (MMC). Recently, it has been shown that such conventional submodule strings can be adapted to achieve single-stage dc/dc conversion. Although the modular string configurations for dc/ac and dc/dc conversion are similar, the underlying power transfer mechanisms employed by each differ significantly. This paper compares the dc/ac and dc/dc energy conversion processes for series-cascaded submodules and highlights their key similarities and differences. In addition, converter operation and control requirements for dc/ac and dc/dc conversion are discussed and compared. A capacitor voltage regulation scheme for dc/dc conversion is proposed, whereby vars generation can be arbitrarily allocated between the converter arms in order to maximize conversion efficiency. It is shown that single-stage dc/dc conversion can reduce converter cost and operating losses by up to 50% as compared to conventional cascaded dc/ac stages, i.e. dc/ac-ac/dc conversion.

本誌: IEEJ Journal of Industry Applications Vol.4 No.4 （2015） Special Issue on IPEC-Hiroshima

本誌掲載ページ: 370-379 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/4/4/4_370/_article/-char/ja/