Prime-mover dynamo plants – Electric control – Fluid-current motors
Reexamination Certificate
2011-02-25
2011-11-08
Cuevas, Pedro J (Department: 2839)
Prime-mover dynamo plants
Electric control
Fluid-current motors
C290S055000, C363S037000
Reexamination Certificate
active
08053917
ABSTRACT:
Reactive power is supplied in accordance with a reactive-power supply instruction from a power grid while ensuring a variable-speed range of a wound-rotor induction generator. A variable-speed power generator includes a prime mover that generates motive power by using natural energy; an electric generator that includes a stator having a primary winding and a rotor having a secondary winding, the stator and the rotor being connected to a power grid, and that generates electric power based on the motive power generated by the prime mover; and a power converter connected to the stator and the rotor, wherein the power converter does not supply reactive power to the power grid, and wherein the variable-speed power generator includes a power-converter controller that causes the electric generator to operate at a rotation speed set to be higher than or equal to a synchronous speed and increases reactive power supplied to the power grid when a reactive-power supply instruction for supplying reactive power to the power grid is obtained from the power grid.
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Matsushita Takatoshi
Naka Takehiro
Nakashima Takumi
Wakasa Tsuyoshi
Yasugi Akira
Berner Kenneth M.
Cuevas Pedro J
Hauptman Benjamin J.
Kanesaka Manabu
Mitsubishi Heavy Industries Ltd.
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