POWER FACTOR COLLECTION METHOD FOR WIND POWER GENERATOR USING CURRENT CONTROL

摘要

The present invention proposes a power factor revision method for a wind power generator using current control, in which a reactive section is removed to improve a power factor of a converter, a phase of a current is corresponded with a phase of a voltage to suppress generation of a reactive power in the converter, and a current variation of a three-phase power inputted to the converter is controlled in conjunction with a voltage variation of the three-phase power, so that a high power factor is secured while using a simple structure of a Vienna converter having three switching devices. To this end, the present invention includes the steps of: determining a variation with respect to a three-phase alternating current voltage through a variation of a three-phase current inputted to a converter; varying the three-phase voltage depending on the variation of the three-phase current by varying the three-phase current in order to allow the three-phase voltage to follow a preset reference voltage (step of associated controlling); and revising a power factor in a reactive section by boosting the three-phase voltage in the reactive section where three-phase voltage is lower than a direct current voltage of the converter (step of power factor revision in a reactive section).