Wind power generator equipped with secondary battery, converter control device, and power converter control method

摘要

PPROBLEM TO BE SOLVED: To improve the utilization factor of a windmill and to suppress the change of an output power due to the output change of the windmill. PSOLUTION: A wind turbine power generator comprises: a rectifier having the rotor of a synchronous generator connected to the shaft of the windmill and connected to the stator of the generator; and an inverter connected to the rectifier and connected to a power system. In this power generator, the variable-frequency power generated from the synchronous generator is converted into a DC power by the rectifier, the DC power is converted to a fixed-frequency AC power by the inverter, a secondary chargeable and dischargeable battery is directly coupled between the rectifier and the inverter, and the battery is always controlled to be charged and discharged so as to suppress the change of the effective power to be output to the power system. PCOPYRIGHT: (C)2004,JPO