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US 8,299,642 B2Granted
Wind power generation system
AssigneeHitachi, Ltd.
InventorsMasaya Ichinose, Motoo Futami, Hiromitsu Sakai, Kazuhiro Imaie
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Abstract
A wind power generation system includes an excessive current consumption device, an AC input of which is connected between a generator rotor and an excitation converter on a system failure to detect a DC voltage ascent of the excitation converter and operate a shunt circuit on the system failure.
Claims14
A wind power generation system that supplies a generated power to a power system from an AC excitation generator, comprising:
- a stator of the AC excitation generator connected with the power system;
- an AC excitation converter connected with a rotor of the AC excitation generator, the rotor of the AC excitation generator connected with a turbine to rotate the rotor of the AC excitation generator by a motive energy of the turbine;
- a shunt circuit unit, shuntable by a switching unit, provided between the AC excitation converter and the rotor of the AC excitation generator;
- a system-sided converter connected between the stator of the AC excitation generator and the power system, a DC portion of the system-sided converter connected with a DC portion of the AC excitation converter;
- and
- a converter controller provided for controlling an excitation converter and the system-sided converter backed up at when a system voltage is descended, wherein
- the converter controller includes a unit that detects a DC voltage, a DC voltage ascent detection unit and a unit that operates the shunt circuit unit when the DC voltage ascent detection unit detects the DC voltage ascent.
4 more elements
Dependencies are inferred from the claim text.