Study of next-generation wind turbine generation systems based on multilevel converters

• Project/Area Number: 26420223
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Hagiwara Makoto 東京工業大学, 工学院, 准教授 (20436710)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: パワーエレクトロニクス / 風力発電 / 双方向チョッパ / マルチレベル変換器 / 風力発電システム / DC-DCコンバータ

Outline of Final Research Achievements

The generator voltage of a cutting-edge wind turbine generation system (WTGS) is expected to increase from the conventional low-voltage level of 690 V to a medium-voltage level of 6.6 kV with a power level up to 10 MW without the
application of a parallel connection of multiple power units. This research project proposed a 10-MW WTGS consisting of a three-phase open-winding synchronous generator equipped with six lead terminals and three modular multilevel converters (MMCs) which are identical in terms of circuit configuration. The validity of the system has been confirmed by computer simulation using PSCAD software package along with experiment using a down-scaled system. Moreover, this research projects has proposed a new non-isolated dc-dc converter which can achieve reduction in size and weight of an inductor. The validity of the new dc-dc converter has been confirmed by a 150 V down-scaled system and computer simulation using PSCAD software package.

Research Products

• [Journal Article] A Medium-Voltage Large Wind Turbine Generation System Using an AC/AC Modular Multilevel Cascade Converter (MMCC) (2016)
  • Author(s): Nuntawat Thitichaiworakorn、萩原誠、赤木泰文
  • Journal Title: IEEE Journal of Emerging and Selected Topics in Power Electronics Volume: 印刷中 Issue: 2 Pages: 534-546
  • DOI: 10.1109/jestpe.2015.2462119
  • Peer Reviewed / Int'l Joint Research
• [Presentation] インダクタの小型・軽量化が実現可能な双方向チョッパの過渡特性 (2017)
  • Author(s): 大西晴菜、萩原誠
  • Organizer: 電気学会全国大会
  • Place of Presentation: 富山大学五福キャンパス
  • Year and Date: 2017-03-15
• [Presentation] インダクタの小型・軽量化が実現可能な双方向チョッパの実験検証 (2017)
  • Author(s): 大西晴菜、萩原誠
  • Organizer: 電気学会半導体電力変換モータドライブ合同研究会
  • Place of Presentation: ダイキン工業株式会社 テクノロジー・イノベーションセンター
  • Year and Date: 2017-01-27
• [Patent(Industrial Property Rights)] Bidirectional chopper circuit (2017)
  • Inventor(s): 赤木泰文、萩原誠
  • Industrial Property Rights Holder: 赤木泰文、萩原誠
  • Industrial Property Rights Type: 特許
  • Filing Date: 2017-03-09
  • Overseas
• [Patent(Industrial Property Rights)] 双方向チョッパ回路 (2015)
  • Inventor(s): 赤木泰文、萩原誠
  • Industrial Property Rights Holder: 赤木泰文、萩原誠
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2015-172771
  • Filing Date: 2015-09-02