1
Masaya Ichinose, Motoo Futami, Shinya Oohara, Kazuhiro Imaie, Mitsugu Matsutake: Power generation apparatus using AC energization synchronous generator and method of controlling the same. Hitachi, Antonelli Terry Stout & Kraus, November 18, 2008: US07453242 (32 worldwide citation)

A power generation apparatus and method includes an AC energization synchronous generator, a switching device for connecting to a network disposed on a stator side of the AC energization synchronous generator, an energizing device for applying a variable frequency AC to a secondary winding of the AC ...


2
Shinya Oohara, Masaya Ichinose, Motoo Futami, Tadashi Sodeyama: Wind power generation system and operating method thereof. Hitachi, Antonelli Terry Stout & Kraus, August 4, 2009: US07569944 (26 worldwide citation)

A wind power generation system wherein procedure for controlling the blade pitch is changed in accordance with the rate of decrease in the amplitude of the grid voltage, and when over current occurs in the grid-side power converter, the grid-side power converter is brought into the gate-blocked cond ...


3
Masaya Ichinose, Motoo Futami, Shinya Oohara, Kazuhiro Imaie, Mitsugu Matsutake: Power generation apparatus using AC energization synchronous generator and method of controlling the same. Hitachi, Antonelli Terry Stout & Kraus, February 19, 2008: US07332894 (19 worldwide citation)

In a power generation apparatus equipped with an AC energization synchronous generator, when energization of a secondary winding starts to conduct connecting to the network of the AC energization synchronous generator to a network voltage, energization of the secondary winding starts at a fixed freq ...


4
Shinya Oohara, Masaya Ichinose, Motoo Futami, Kazuya Tsutsumi, Takashi Shiraishi, Shigeo Yoshida, Hajime Komiyama, Junichi Sugino: Wind turbine and operating method thereof. Hitachi, Fuji Heavy, Antonelli Terry Stout & Kraus, February 14, 2012: US08116914 (12 worldwide citation)

A pitch controller, uninterruptible power supply, and rotational speed detector are disposed in the rotor in a wind turbine. When a slip ring failure or wire breakage occurs, the pitch controller internally creates a pitch angle command so as to control the pitch angle.


5
Masaya Ichinose, Shinya Oohara, Motoo Futami, Yasuhiro Imazu: Power converter for doubly-fed power generator system. Hitachi, Antonelli Terry Stout & Kraus, February 3, 2009: US07485980 (11 worldwide citation)

An excitation power converter of a doubly-fed generator is protected from excess current to be caused by ground fault or system disturbance and operation continuity of the power converter is ensured. In a power converter system, in order not to flow excess current generated in secondary windings of ...


6
Shinya Oohara, Masaya Ichinose, Motoo Futami, Tadashi Sodeyama: Wind power generation system and operation method thereof. Hitachi, Antonelli Terry Stout & Kraus, January 10, 2012: US08093740 (10 worldwide citation)

A wind power generation system wherein procedure for controlling the blade pitch is changed in accordance with the rate of decrease in the amplitude of the grid voltage, and when over current occurs in the grid-side power converter, the grid-side power converter is brought into the gate-blocked cond ...


7
Shinya Oohara, Masaya Ichinose, Motoo Futami, Mitsugu Matsutake, Shoji Fukuda: Distributed generation system and power system stabilizing method. Hitachi, Antonelli Terry Stout & Kraus, February 16, 2010: US07663348 (9 worldwide citation)

A distributed generation system that can suppress a voltage fluctuation caused by a distributed generation by an apparatus of a small power capacity in the distributed generation itself and stabilize the power system voltage without inserting interharmonic voltage or current into the power system an ...


8
Masaya Ichinose, Shinya Oohara, Motoo Futami, Mitsugu Matsutake, Hiromitsu Sakai: Wind power generation system and method of controlling power converter. Hitachi, Antonelli Terry Stout & Kraus, May 31, 2011: US07952214 (8 worldwide citation)

A wind power generation system temporarily stops a power converter when a system disturbance occurs, and reactivates the power converter after detecting a solution of the problem of an influence (overcurrent of a stator, direct current component of a stator, overcurrent of a rotor, etc.) of a fault ...


9
Masaya Ichinose, Shinya Oohara, Motoo Futami, Mitsugu Matsutake: Wind power generation system. Hitachi, Antonelli Terry Stout & Kraus, June 1, 2010: US07728451 (8 worldwide citation)

A wind power generation system includes: a wind turbine in which at least one blade is mounted on an axis; a generator for generating multiphase alternating current power by rotation of the axis; and a multiphase power conversion device for performing PWM-control for adjustment and output of generat ...


10
Masaya Ichinose, Shinya Oohara, Motoo Futami: Wind power generation apparatus, wind power generation system and power system control apparatus. Hitachi, Antonelli Terry Stout & Kraus, January 5, 2010: US07642666 (7 worldwide citation)

An interface device transmits a reactive power command depending on a power system from a voltage regulation device of the power system to a wind power generation apparatus electrically connected to the power system, and the wind power generation apparatus receives the reactive power command. Then, ...