Studies on oscillation damping of virtual synchronous generators using modern control theory

• Project/Area Number: 17K14643
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: Osaka University
• Principal Investigator: Liu Jia 大阪大学, 工学研究科, 助教 (00791922)
• Research Collaborator: Ise Toshifumi ; Miura Yushi
• Project Period (FY): 2017-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2017: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
• Keywords: インバータ / 分散電源 / 仮想同期発電機 / 状態フィードバック / 極配置 / 現代制御理論 / 状態フィードバック制御 / 電力工学 / 再生可能エネルギー / 制御工学

Outline of Final Research Achievements

Virtual synchronous generator (VSG) control is a promising control method for inverter-interfaced distributed generator, as it can provide inertia support for the power system. In this study, we try to propose a novel damping method adopting modern control theory, in order to alleviate the oscillatory feature of VSG-based inverter. This idea is realized by a solution based on state feedback control using pole placement, and its tuning method and design procedure are established. Moreover, the proposed method is analyzed and evaluated in various operation mode and under various conditions, and comparisons with existing methods are performed. As a result, from theoretical analyses and experimental results, we demonstrate that the proposed method has faster response than previous methods with outstanding ripple and noise attenuation ability.

Academic Significance and Societal Importance of the Research Achievements

再生可能エネルギー発電の大量導入により、同期発電機がどんどんインバータに切り替わっていく次世代の電力系統において、インバータの慣性補償機能が重要になる。それができる仮想同期発電機制御が振動しやすいが、本研究で提案した振動低減方法でその弱点をなくし、インバータ型分散電源の大量導入の土台を構築した。提案した設計方法と解析方法も、分散電源の研究において世界を先んじ、今後の研究開発の理論的基盤に寄与する。

Research Products

• [Journal Article] A Novel Oscillation Damping Method of Virtual Synchronous Generator Control Without PLL Using Pole Placement (2018)
  • Author(s): Jia Liu, Yushi Miura and Toshifumi Ise
  • Journal Title: Proceedings of International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia-) Volume: -
  • Peer Reviewed
• [Journal Article] 極配置法による仮想同期発電機制御の振動抑制方法 (2017)
  • Author(s): 劉佳,三浦友史,伊瀬敏史
  • Journal Title: 電気学会 電力技術・電力系統技術合同研究会資料 Volume: PE-17-101,PSE-17-101 Pages: 1-6
• [Presentation] A Comparative Study on Damping Methods of Virtual Synchronous Generator Control (2019)
  • Author(s): Jia Liu, Yushi Miura, and Toshifumi Ise
  • Organizer: 21st European Conference on Power Electronics and Applications (EPE 2019)
  • Int'l Joint Research
• [Presentation] A Novel Oscillation Damping Method of Virtual Synchronous Generator Control Without PLL Using Pole Placement (2018)
  • Author(s): Jia Liu, Yushi Miura and Toshifumi Ise
  • Organizer: International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia-)
  • Int'l Joint Research
• [Presentation] 極配置法による仮想同期発電機制御の振動抑制方法 (2017)
  • Author(s): 劉佳,三浦友史,伊瀬敏史
  • Organizer: 電気学会 電力技術・電力系統技術合同研究会