Wind Power Generation Apparatus, Wind Power Generation System And Power System Control Apparatus

Abstract

A power system control apparatus which controls a power system electrically connected to a wind power generation apparatus having a wind turbine which receives wind and rotates, a generator which generates electric power by the rotating wind turbine, and a power converter which converts the electric power generated by the generator. The power system control apparatus includes a voltage detector for detecting a voltage of the power system, a reactive power command value generation unit for generating a reactive power command value from a voltage detection value of the voltage detector, and a transmission unit for transmitting the reactive power command value to the wind power generation apparatus. Output fluctuation of the generator is suppressed, and reactive power according to the reactive power command value is transmitted from the wind power generation apparatus to the power system.

1 . A power system control apparatus which controls a power system electrically connected to a wind power generation apparatus having a wind turbine which receives wind and rotates, a generator which generates electric power by the rotating wind turbine, and a power converter which converts the electric power generated by the generator, said apparatus comprising:
 a voltage detector for detecting a voltage of the power system;   a reactive power command value generation unit for generating a reactive power command value from a voltage detection value of the voltage detector; and   a transmission unit for transmitting the reactive power command value to the wind power generation apparatus;   wherein output fluctuation of the generator is suppressed, and reactive power according to the reactive power command value is transmitted from the wind power generation apparatus to the power system.   
     
     
         2 . The power system control apparatus according to  claim 1 ,
 wherein when a plurality of wind power generation apparatuses are electrically connected to the power system, the reactive power command value generation unit comprises means for transmitting a reactive power command value larger than a value of a second wind power generation apparatus having larger output active power to a first wind power generation apparatus having small output active power in the plurality of wind power generation apparatuses.   
     
     
         3 . The power system control apparatus according to  claim 1 ,
 wherein when a plurality of wind power generation apparatuses are electrically connected to the power system, the reactive power command value generation unit comprises means for transmitting a reactive power command value smaller than a value of a second wind power generation apparatus having smaller output active power to a first wind power generation apparatus having large output active power in the plurality of wind power generation apparatuses.   
     
     
         4 . The power system control apparatus according to  claim 1 ,
 wherein the reactive power command value generation unit generates a delay reactive power command when the voltage detection value is higher than a predetermined value;   wherein the reactive power command value generation unit generates an advance reactive power command when the voltage detection value is lower than the predetermined value; and   wherein a first reactive power command value is changed in such a way that the voltage detection value is in a predetermined range.