2002 Fiscal Year Final Research Report Summary
Development of a doubly-fed generator for load leveling of a magnetic-flux deviation of a proton synchrotron
| Project/Area Number |
12555077
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
電力工学・電気機器工学
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
AKAGI Hirofumi Tokyo Institute of Technology, Electrical Engineering, Professor, 大学院・理工学研究科, 教授 (80126466)
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| Co-Investigator(Kenkyū-buntansha) |
OGASAWARA Satoshi Okayama University, Electrical Engineering, Associate Professor, 工学部, 助教授 (40160733)
TAKEMOTO Masatsugu Tokyo Institute of Technology, Electrical Engineering, Research Associate, 大学院・理工学研究科, 助手 (80313336)
FUJITA Hideaki Tokyo Institute of Technology, Electrical Engineering, Associate Professor, 大学院・理工学研究科, 助教授 (40238580)
SATO Yukihiko Chiba University, Electrical Engineering, Associate Professor, 工学部, 助教授 (50205978)
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| Project Period (FY) |
2000 – 2002
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| Keywords | Flywheel generator / Doubly-fed induction machine / Adjustable-speed drive / Energy storage / Magnetic dc deviation |
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| Research Abstract |
A flywheel energy storage system based on a doubly-fed induction generator basically consists of a wound-rotor induction machine and a voltage-source PWM rectifier/inverter used as an ac exciter.
This research focused on a doubly-fed induction generator intended for load leveling of a magnetic power supply for the next-generation proton synchrotron. A digital controller for the generator, developed in this research, is characterized by the combination of vector control and decoupling control. The controller enables the generator to perform active power control independent of reactive power control even in transient states. An experimental system rated at 7.5 kW was designed and constructed by combination of power electronics and motor drive technologies. The validity of the theory developed in this paper, along with the effectiveness and viability of the control strategy, is confirmed by the experimental system. The experimental system consists of a 7.5-kVA doubly-fed induction generator with a vertical axis.
In addition, this research discusses a transient behavior of a magnetizing current in the induction machine, and proposed a new control method for suppressing a magnetic-flux deviation that may occur in the doubly-fed induction generator. The viability and effectiveness of the proposed method is verified by experiments using the 7.5-kW prototype developed in this research.
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