Patent ID: 9350261
Filing Date: 2016-05-24
CPC Classification: H02J,H02M,Y02E

Claim Text:
1. A power converter apparatus that is applied to a wind power generation system and converts power generated by a wind power generator to alternating-current power supplied for a power system, the power converter apparatus comprising: a system voltage detector configured to detect a system voltage of the power system; a converter controller configured to be exclusively controlled by an alternating-current detected from the wind power generator, generate a power instruction value and a gate signal only based on the alternating-current and input the generated gate signal to a converter that converts the alternating-current to a direct-current: an inverter controller configured to receive the generated power instruction value from the converter controller; and an inverter configured to convert the direct-current converted by the converter to the alternating-current power supplied for the power system, wherein the inverter controller is configured to control the inverter to stably output power generated by the wind power generator to the power system based on another power instruction value from a higher level controller and to control an output voltage of the inverter to stabilize the system voltage of the power system based on an alternating-current voltage instruction value when the system voltage detected by the system voltage detector is within a preset range having an upper limit and a lower limit, and configured to control an output current of the inverter such that an active current component and a reactive current component are those corresponding to a variation rate of the system voltage to stabilize the system voltage of the power system by use of a voltage drop due to impedance of the power system when the system voltage detected by the system voltage detector is outside the preset range.