Study on frequency converter for low frequency transmission using modular matrix converter

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560332
• 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: Osaka University
• Principal Investigator: MIURA Yushi 大阪大学, 工学(系)研究科(研究院), 准教授 (90354646)
• Co-Investigator(Kenkyū-buntansha): ISE Toshifumi 大阪大学, 大学院工学研究科, 教授 (00184581)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: モジュラーマトリックスコンバータ / 低周波送電 / 電圧空間ベクトル変調 / キャパシタ電圧平衡制御

Outline of Final Research Achievements

Modular multilevel matrix converter (MMxC) for low frequency transmission that is applicable to off-shore wind farms is investigated. Its converter arm is composed of series-connected H bridge cells, and each H bridge cell consists of 4 switching devices and a capacitor. Thus the MMxC is able to output multilevel waveforms and therefore suitable for high power and high voltage applications. In this research, for the MMxC, power flow control and capacitor voltage balancing control among H bridge cells using voltage space vector modulation are proposed. A broad frequency range of the proposed controls from a low frequency to a commercial frequency are verified through numerical simulations and experiments using a 2-kVA MMxC.

Free Research Field

パワーエレクトロニクス，電力系統，核融合装置，超伝導コイルなどに適用される大型電源